Ignet
Search (e.g., vaccine, IFNG): Help
About
Home
Introduction
Statistics
Programs
Dignet
Gene
GenePair
BioSummarAI
Help & Docs
Documents
Help
FAQs
Links
Acknowledge
Disclaimer
Contact Us
UM Logo

UMMS Logo

UMMS Logo

Gene Information

Gene symbol: GAD2

Gene name: glutamate decarboxylase 2 (pancreatic islets and brain, 65kDa)

HGNC ID: 4093

Synonyms: GAD65

Related Genes

# Gene Symbol Number of hits
1 AIRE 1 hits
2 ALB 1 hits
3 ALPI 1 hits
4 ANXA13 1 hits
5 APC 1 hits
6 ATM 1 hits
7 C2orf28 1 hits
8 CCL2 1 hits
9 CCL3 1 hits
10 CCNH 1 hits
11 CD28 1 hits
12 CD4 1 hits
13 CD79A 1 hits
14 CD8A 1 hits
15 CLN3 1 hits
16 CLN4 1 hits
17 CPE 1 hits
18 CRP 1 hits
19 CRS 1 hits
20 CSAD 1 hits
21 CTLA4 1 hits
22 CXCL10 1 hits
23 CYP21A2 1 hits
24 DDC 1 hits
25 FOXP3 1 hits
26 G6PC 1 hits
27 G6PC2 1 hits
28 GAA 1 hits
29 GAD1 1 hits
30 GCLC 1 hits
31 GFAP 1 hits
32 GLRA1 1 hits
33 HDC 1 hits
34 HLA-A 1 hits
35 HLA-DQA1 1 hits
36 HLA-DRB1 1 hits
37 HLA-DRB5 1 hits
38 HMI 1 hits
39 HRB 1 hits
40 HSPA1A 1 hits
41 HSPD1 1 hits
42 ICA1 1 hits
43 IDDM2 1 hits
44 IFNA1 1 hits
45 IFNG 1 hits
46 IL10 1 hits
47 IL12A 1 hits
48 IL13 1 hits
49 IL17A 1 hits
50 IL1A 1 hits
51 IL1B 1 hits
52 IL2 1 hits
53 IL2RA 1 hits
54 IL4 1 hits
55 IL5 1 hits
56 IL6 1 hits
57 IL7R 1 hits
58 INS 1 hits
59 INSM2 1 hits
60 IRF1 1 hits
61 ISG20 1 hits
62 KLK3 1 hits
63 LBR 1 hits
64 LEP 1 hits
65 LMNA 1 hits
66 LTA 1 hits
67 MADCAM1 1 hits
68 MET 1 hits
69 MICA 1 hits
70 NOS2A 1 hits
71 NPY 1 hits
72 NUDT10 1 hits
73 OPRD1 1 hits
74 PNMT 1 hits
75 POLE3 1 hits
76 PTPLA 1 hits
77 PTPN22 1 hits
78 PTPRN 1 hits
79 PTPRN2 1 hits
80 RAG2 1 hits
81 SEPHS1 1 hits
82 SLC30A10 1 hits
83 SLC30A8 1 hits
84 SLC32A1 1 hits
85 SLC37A4 1 hits
86 SMCR 1 hits
87 SOX13 1 hits
88 SST 1 hits
89 TERF1 1 hits
90 TG 1 hits
91 TGFA 1 hits
92 TGFB1 1 hits
93 TGFB2 1 hits
94 TGM2 1 hits
95 TH1L 1 hits
96 TNF 1 hits
97 TNFRSF10A 1 hits
98 TNFRSF25 1 hits
99 TNFRSF4 1 hits
100 TNFRSF6B 1 hits
101 TOR1A 1 hits
102 TPO 1 hits
103 TPP1 1 hits
104 TRA 1 hits
105 TSHB 1 hits
106 TSHR 1 hits
107 TXN 1 hits

Related Sentences

# PMID Sentence
1 1370298 Insulin-dependent diabetes mellitus (IDDM) is thought to result from the autoimmune destruction of the insulin-producing beta cells of the pancreas.
2 1370298 Years before IDDM symptoms appear, we can detect autoantibodies to one or both forms of glutamate decarboxylase (GAD65 and GAD67), synthesized from their respective cDNAs in a bacterial expression system.
3 1370298 Although the level of GAD autoantibodies generally decline after IDDM onset, patients with IDDM-associated neuropathies have high levels of antibodies to GAD, years after the appearance of clinical IDDM.
4 1370298 We note a striking sequence similarity between the two GADs and Coxsackievirus, a virus that has been associated with IDDM both in humans and in experimental animals.
5 1549570 We report the isolation and sequencing of cDNAs encoding two human glutamate decarboxylases (GADs; L-glutamate 1-carboxy-lyase, EC 4.1.1.15), GAD65 and GAD67.
6 1549570 In situ hybridization of fluorescently labeled GAD probes to human chromosomes localizes the human GAD65 gene to chromosome 10p11.23 and the human GAD67 gene to chromosome 2q31.
7 1549570 We report the isolation and sequencing of cDNAs encoding two human glutamate decarboxylases (GADs; L-glutamate 1-carboxy-lyase, EC 4.1.1.15), GAD65 and GAD67.
8 1549570 In situ hybridization of fluorescently labeled GAD probes to human chromosomes localizes the human GAD65 gene to chromosome 10p11.23 and the human GAD67 gene to chromosome 2q31.
9 1924293 GAD has also been implicated as an autoantigen in the vastly differing autoimmune disease stiff-man syndrome and insulin-dependent diabetes mellitus.
10 1924293 Using sequence information from GAD-1 to screen a human pancreatic islet cDNA library, we describe the isolation of an additional GAD cDNA (GAD-2), which was mapped to the short arm of human chromosome 10.
11 1924293 Genomic Southern blotting with GAD-2 demonstrated a hybridization pattern different from that detected by GAD-1.
12 1924293 GAD-2 recognizes a 5.6-kilobase transcript in both islets and brain, in contrast to GAD-1, which detects a 3.7-kilobase transcript in brain only.
13 1924293 The deduced 585-amino acid sequence coded for by GAD-2 shows less than 65% identity to previously published, highly conserved GAD-1 brain sequences, which show greater than 96% deduced amino acid sequence homology among the three species.
14 1924293 The function of this additional islet GAD isoform and its importance as an autoantigen in insulin-dependent diabetes remain to be determined.
15 1924293 GAD has also been implicated as an autoantigen in the vastly differing autoimmune disease stiff-man syndrome and insulin-dependent diabetes mellitus.
16 1924293 Using sequence information from GAD-1 to screen a human pancreatic islet cDNA library, we describe the isolation of an additional GAD cDNA (GAD-2), which was mapped to the short arm of human chromosome 10.
17 1924293 Genomic Southern blotting with GAD-2 demonstrated a hybridization pattern different from that detected by GAD-1.
18 1924293 GAD-2 recognizes a 5.6-kilobase transcript in both islets and brain, in contrast to GAD-1, which detects a 3.7-kilobase transcript in brain only.
19 1924293 The deduced 585-amino acid sequence coded for by GAD-2 shows less than 65% identity to previously published, highly conserved GAD-1 brain sequences, which show greater than 96% deduced amino acid sequence homology among the three species.
20 1924293 The function of this additional islet GAD isoform and its importance as an autoantigen in insulin-dependent diabetes remain to be determined.
21 1924293 GAD has also been implicated as an autoantigen in the vastly differing autoimmune disease stiff-man syndrome and insulin-dependent diabetes mellitus.
22 1924293 Using sequence information from GAD-1 to screen a human pancreatic islet cDNA library, we describe the isolation of an additional GAD cDNA (GAD-2), which was mapped to the short arm of human chromosome 10.
23 1924293 Genomic Southern blotting with GAD-2 demonstrated a hybridization pattern different from that detected by GAD-1.
24 1924293 GAD-2 recognizes a 5.6-kilobase transcript in both islets and brain, in contrast to GAD-1, which detects a 3.7-kilobase transcript in brain only.
25 1924293 The deduced 585-amino acid sequence coded for by GAD-2 shows less than 65% identity to previously published, highly conserved GAD-1 brain sequences, which show greater than 96% deduced amino acid sequence homology among the three species.
26 1924293 The function of this additional islet GAD isoform and its importance as an autoantigen in insulin-dependent diabetes remain to be determined.
27 1924293 GAD has also been implicated as an autoantigen in the vastly differing autoimmune disease stiff-man syndrome and insulin-dependent diabetes mellitus.
28 1924293 Using sequence information from GAD-1 to screen a human pancreatic islet cDNA library, we describe the isolation of an additional GAD cDNA (GAD-2), which was mapped to the short arm of human chromosome 10.
29 1924293 Genomic Southern blotting with GAD-2 demonstrated a hybridization pattern different from that detected by GAD-1.
30 1924293 GAD-2 recognizes a 5.6-kilobase transcript in both islets and brain, in contrast to GAD-1, which detects a 3.7-kilobase transcript in brain only.
31 1924293 The deduced 585-amino acid sequence coded for by GAD-2 shows less than 65% identity to previously published, highly conserved GAD-1 brain sequences, which show greater than 96% deduced amino acid sequence homology among the three species.
32 1924293 The function of this additional islet GAD isoform and its importance as an autoantigen in insulin-dependent diabetes remain to be determined.
33 1939164 The 64-kDa pancreatic beta-cell autoantigen, which is a target of autoantibodies associated with early as well as progressive stages of beta-cell destruction, resulting in insulin-dependent diabetes (IDDM) in humans, has been identified as the gamma-aminobutyric acid-synthesizing enzyme glutamic acid decarboxylase.
34 1939164 Comparative analysis of the brain and beta-cell forms of GAD show that GAD65 and GAD64 in pancreatic beta-cells correspond to the larger and smaller forms of GAD in brain, respectively.
35 7505244 GAD autoantibodies in IDDM, stiff-man syndrome, and autoimmune polyendocrine syndrome type I recognize different epitopes.
36 7505244 Glutamic acid decarboxylase (GAD) is a major islet cell autoantigen in insulin-dependent diabetes mellitus (IDDM), and autoantibodies are found in high frequencies in patients with recent-onset IDDM, stiff-man syndrome (SMS), and autoimmune polyendocrine syndrome type I (APS I).
37 7505244 In this study, we examined the reactivity of anti-GAD-containing sera from 7 patients with IDDM, 4 patients with SMS, and 5 patients with APS I.
38 7505244 All sera immunoprecipitated GAD from [35S]methionine-labeled rat islet lysates and the sera from patients with SMS and APS I, but none of the IDDM patients' sera, identified the GAD protein in Western blots.
39 7505244 Two of four SMS patients' sera and 5 of 5 APS I patients' sera, in contrast to 0 of 7 IDDM patients' sera, inhibited the enzymatic activity of GAD.
40 7505244 When the various sera were tested with the GAD65 and GAD67 isoforms, produced separately by transient expression in COS cells, the enzymatic activity of GAD65 was inhibited by sera from patients with SMS and APS I, whereas no effect on the GAD67 activity was observed.
41 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
42 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
43 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
44 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
45 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
46 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
47 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
48 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
49 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
50 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
51 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
52 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
53 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
54 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
55 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
56 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
57 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
58 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
59 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
60 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
61 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
62 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
63 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
64 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
65 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
66 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
67 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
68 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
69 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
70 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
71 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
72 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
73 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
74 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
75 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
76 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
77 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
78 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
79 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
80 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
81 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
82 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
83 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
84 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
85 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
86 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
87 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
88 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
89 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
90 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
91 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
92 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
93 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
94 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
95 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
96 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
97 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
98 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
99 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
100 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
101 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
102 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
103 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
104 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
105 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
106 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
107 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
108 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
109 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
110 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
111 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
112 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
113 7519242 Higher autoantibody levels and recognition of a linear NH2-terminal epitope in the autoantigen GAD65, distinguish stiff-man syndrome from insulin-dependent diabetes mellitus.
114 7519242 Thus, destruction of pancreatic beta cells, which results in insulin-dependent diabetes mellitus (IDDM), and impairment of GABA-ergic synaptic transmission in Stiff-Man syndrome (SMS) are both characterized by circulating autoantibodies to GAD65.
115 7519242 Here we report the characterization of humoral autoimmune responses to GAD65 in 35 SMS patients, of whom 13 (37%) also had IDDM.
116 7519242 All SMS patients immunoprecipitated native GAD65 and the main titers were orders of magnitude higher than in IDDM patients.
117 7519242 Furthermore, in contrast to the situation in IDDM, autoantibodies in 35 of 35 (100%) of SMS patients recognized denatured GAD65 on Western blots.
118 7519242 The first pattern, detected in 25 of 35 SMS patients (71%), of whom 11 had IDDM (44%), was predominantly reactive with a linear NH2-terminal epitope residing in the first eight amino acids of GAD65.
119 7519242 The second epitope pattern may represent epitope spreading in the GAD65 molecule, but may also include some cases of epitope recognition associated with IDDM resistant HLA-haplotypes.
120 7519242 The principal NH2-terminal linear epitope in GAD65 distinguishes the reactivity of SMS and IDDM autoantibodies and may be a determinant of pathogenicity for GABA-ergic neurons.
121 7519242 The greater magnitude and distinct specificity of the humoral response to GAD65 in SMS may reflect a biased involvement of the T helper cell type 2 (Th2) subset of CD4+ T cells and antibody responses, whereas IDDM is likely mediated by the Th1 subset of CD4+ T cells and cytotoxic T cell responses.
122 7523207 The possible role of amino acid sequence and epitope homologies between a protein P2-C of Coxsackie virus B4 and human GAD in the development of host-specific immune response in insulin-dependent diabetes mellitus (IDDM) (molecular mimicry) was investigated.
123 7523207 Peptide antibodies to the P2-C protein, GAD65, and GAD67 were raised to analyze their immunoreactivity by enzyme-linked immunosorbent assay and immunoblotting with GAD purified from the brain and pancreas of mice that develop hyperglycemia after the infection.
124 7523207 All three peptide antisera reacted very strongly with homologous peptides; P2-C antiserum cross-reacted with GAD65 as efficiently as GAD65 antiserum with P2-C, but no cross-reaction was detected between P2-C and GAD67 although cross-reaction between the two GADs was quite pronounced.
125 7523207 P2-C antiserum immunocomplexed with GAD65 from mouse brain or pancreas, whereas GAD65 and GAD67 antisera both immunocomplexed with the two GADs from these sources.
126 7523207 A number of IDDM sera reacted with mouse GAD65 and also with P2-C and GAD65 peptides, whereas only a few reacted with GAD67 peptide.
127 7523207 The immunoreactivity of the mouse and IDDM sera to P2-C and GAD65 peptides was blocked by pre-adsorption with mouse GAD.
128 7523207 The possible role of amino acid sequence and epitope homologies between a protein P2-C of Coxsackie virus B4 and human GAD in the development of host-specific immune response in insulin-dependent diabetes mellitus (IDDM) (molecular mimicry) was investigated.
129 7523207 Peptide antibodies to the P2-C protein, GAD65, and GAD67 were raised to analyze their immunoreactivity by enzyme-linked immunosorbent assay and immunoblotting with GAD purified from the brain and pancreas of mice that develop hyperglycemia after the infection.
130 7523207 All three peptide antisera reacted very strongly with homologous peptides; P2-C antiserum cross-reacted with GAD65 as efficiently as GAD65 antiserum with P2-C, but no cross-reaction was detected between P2-C and GAD67 although cross-reaction between the two GADs was quite pronounced.
131 7523207 P2-C antiserum immunocomplexed with GAD65 from mouse brain or pancreas, whereas GAD65 and GAD67 antisera both immunocomplexed with the two GADs from these sources.
132 7523207 A number of IDDM sera reacted with mouse GAD65 and also with P2-C and GAD65 peptides, whereas only a few reacted with GAD67 peptide.
133 7523207 The immunoreactivity of the mouse and IDDM sera to P2-C and GAD65 peptides was blocked by pre-adsorption with mouse GAD.
134 7523207 The possible role of amino acid sequence and epitope homologies between a protein P2-C of Coxsackie virus B4 and human GAD in the development of host-specific immune response in insulin-dependent diabetes mellitus (IDDM) (molecular mimicry) was investigated.
135 7523207 Peptide antibodies to the P2-C protein, GAD65, and GAD67 were raised to analyze their immunoreactivity by enzyme-linked immunosorbent assay and immunoblotting with GAD purified from the brain and pancreas of mice that develop hyperglycemia after the infection.
136 7523207 All three peptide antisera reacted very strongly with homologous peptides; P2-C antiserum cross-reacted with GAD65 as efficiently as GAD65 antiserum with P2-C, but no cross-reaction was detected between P2-C and GAD67 although cross-reaction between the two GADs was quite pronounced.
137 7523207 P2-C antiserum immunocomplexed with GAD65 from mouse brain or pancreas, whereas GAD65 and GAD67 antisera both immunocomplexed with the two GADs from these sources.
138 7523207 A number of IDDM sera reacted with mouse GAD65 and also with P2-C and GAD65 peptides, whereas only a few reacted with GAD67 peptide.
139 7523207 The immunoreactivity of the mouse and IDDM sera to P2-C and GAD65 peptides was blocked by pre-adsorption with mouse GAD.
140 7523207 The possible role of amino acid sequence and epitope homologies between a protein P2-C of Coxsackie virus B4 and human GAD in the development of host-specific immune response in insulin-dependent diabetes mellitus (IDDM) (molecular mimicry) was investigated.
141 7523207 Peptide antibodies to the P2-C protein, GAD65, and GAD67 were raised to analyze their immunoreactivity by enzyme-linked immunosorbent assay and immunoblotting with GAD purified from the brain and pancreas of mice that develop hyperglycemia after the infection.
142 7523207 All three peptide antisera reacted very strongly with homologous peptides; P2-C antiserum cross-reacted with GAD65 as efficiently as GAD65 antiserum with P2-C, but no cross-reaction was detected between P2-C and GAD67 although cross-reaction between the two GADs was quite pronounced.
143 7523207 P2-C antiserum immunocomplexed with GAD65 from mouse brain or pancreas, whereas GAD65 and GAD67 antisera both immunocomplexed with the two GADs from these sources.
144 7523207 A number of IDDM sera reacted with mouse GAD65 and also with P2-C and GAD65 peptides, whereas only a few reacted with GAD67 peptide.
145 7523207 The immunoreactivity of the mouse and IDDM sera to P2-C and GAD65 peptides was blocked by pre-adsorption with mouse GAD.
146 7523207 The possible role of amino acid sequence and epitope homologies between a protein P2-C of Coxsackie virus B4 and human GAD in the development of host-specific immune response in insulin-dependent diabetes mellitus (IDDM) (molecular mimicry) was investigated.
147 7523207 Peptide antibodies to the P2-C protein, GAD65, and GAD67 were raised to analyze their immunoreactivity by enzyme-linked immunosorbent assay and immunoblotting with GAD purified from the brain and pancreas of mice that develop hyperglycemia after the infection.
148 7523207 All three peptide antisera reacted very strongly with homologous peptides; P2-C antiserum cross-reacted with GAD65 as efficiently as GAD65 antiserum with P2-C, but no cross-reaction was detected between P2-C and GAD67 although cross-reaction between the two GADs was quite pronounced.
149 7523207 P2-C antiserum immunocomplexed with GAD65 from mouse brain or pancreas, whereas GAD65 and GAD67 antisera both immunocomplexed with the two GADs from these sources.
150 7523207 A number of IDDM sera reacted with mouse GAD65 and also with P2-C and GAD65 peptides, whereas only a few reacted with GAD67 peptide.
151 7523207 The immunoreactivity of the mouse and IDDM sera to P2-C and GAD65 peptides was blocked by pre-adsorption with mouse GAD.
152 7525393 The 65-kDa isoform of glutamic acid decarboxylase (GAD65) has been implicated in autoimmune diabetes in NOD mice, but the role of the 67-kDa GAD isoform (GAD67) is less clear.
153 7532143 Although most individuals with insulin-dependent diabetes mellitus (IDDM) have autoantibodies to glutamic acid decarboxylase (GAD), antibodies to GAD are also present in some individuals with a low risk of developing diabetes.
154 7532143 The GAD autoantibodies of IDDM are specific for the GAD65 isoform, do not bind denatured GAD protein, and target epitope(s) dependent on conformation of the protein.
155 7532143 However, the IDDM epitopes have been difficult to further define because the antibodies do not bind GAD protein fragments or synthetic peptides.
156 7532143 Since the GAD67 isoform is highly homologous to GAD65 but is usually not a target of the GAD autoantibodies in IDDM sera, we created six GAD65/GAD67 chimeric proteins to maintain the overall GAD protein conformation and used these chimeric proteins to map conformation-dependent epitopes of GAD65 targeted by IDDM sera.
157 7532143 We find that the GAD binding present in most IDDM sera (n = 11 of 12) is composed of two distinct GAD antibody specificities that target different conformation-dependent regions of the GAD65 protein, one that is located between amino acids 240 and 435 (termed IDDM-E1) and one that is located between amino acids 451 and 570 (termed IDDM-E2).
158 7532143 Identification of epitopes targeted by IDDM sera may allow one to distinguish between GAD antibody-positive individuals at high and low risk of developing IDDM and to determine if differences in the autoimmune repertoire directed at GAD are present.
159 7532143 The chimeric GAD65/GAD67 proteins may also be useful in designing GAD assays specific for IDDM.
160 7532143 Although most individuals with insulin-dependent diabetes mellitus (IDDM) have autoantibodies to glutamic acid decarboxylase (GAD), antibodies to GAD are also present in some individuals with a low risk of developing diabetes.
161 7532143 The GAD autoantibodies of IDDM are specific for the GAD65 isoform, do not bind denatured GAD protein, and target epitope(s) dependent on conformation of the protein.
162 7532143 However, the IDDM epitopes have been difficult to further define because the antibodies do not bind GAD protein fragments or synthetic peptides.
163 7532143 Since the GAD67 isoform is highly homologous to GAD65 but is usually not a target of the GAD autoantibodies in IDDM sera, we created six GAD65/GAD67 chimeric proteins to maintain the overall GAD protein conformation and used these chimeric proteins to map conformation-dependent epitopes of GAD65 targeted by IDDM sera.
164 7532143 We find that the GAD binding present in most IDDM sera (n = 11 of 12) is composed of two distinct GAD antibody specificities that target different conformation-dependent regions of the GAD65 protein, one that is located between amino acids 240 and 435 (termed IDDM-E1) and one that is located between amino acids 451 and 570 (termed IDDM-E2).
165 7532143 Identification of epitopes targeted by IDDM sera may allow one to distinguish between GAD antibody-positive individuals at high and low risk of developing IDDM and to determine if differences in the autoimmune repertoire directed at GAD are present.
166 7532143 The chimeric GAD65/GAD67 proteins may also be useful in designing GAD assays specific for IDDM.
167 7532143 Although most individuals with insulin-dependent diabetes mellitus (IDDM) have autoantibodies to glutamic acid decarboxylase (GAD), antibodies to GAD are also present in some individuals with a low risk of developing diabetes.
168 7532143 The GAD autoantibodies of IDDM are specific for the GAD65 isoform, do not bind denatured GAD protein, and target epitope(s) dependent on conformation of the protein.
169 7532143 However, the IDDM epitopes have been difficult to further define because the antibodies do not bind GAD protein fragments or synthetic peptides.
170 7532143 Since the GAD67 isoform is highly homologous to GAD65 but is usually not a target of the GAD autoantibodies in IDDM sera, we created six GAD65/GAD67 chimeric proteins to maintain the overall GAD protein conformation and used these chimeric proteins to map conformation-dependent epitopes of GAD65 targeted by IDDM sera.
171 7532143 We find that the GAD binding present in most IDDM sera (n = 11 of 12) is composed of two distinct GAD antibody specificities that target different conformation-dependent regions of the GAD65 protein, one that is located between amino acids 240 and 435 (termed IDDM-E1) and one that is located between amino acids 451 and 570 (termed IDDM-E2).
172 7532143 Identification of epitopes targeted by IDDM sera may allow one to distinguish between GAD antibody-positive individuals at high and low risk of developing IDDM and to determine if differences in the autoimmune repertoire directed at GAD are present.
173 7532143 The chimeric GAD65/GAD67 proteins may also be useful in designing GAD assays specific for IDDM.
174 7532143 Although most individuals with insulin-dependent diabetes mellitus (IDDM) have autoantibodies to glutamic acid decarboxylase (GAD), antibodies to GAD are also present in some individuals with a low risk of developing diabetes.
175 7532143 The GAD autoantibodies of IDDM are specific for the GAD65 isoform, do not bind denatured GAD protein, and target epitope(s) dependent on conformation of the protein.
176 7532143 However, the IDDM epitopes have been difficult to further define because the antibodies do not bind GAD protein fragments or synthetic peptides.
177 7532143 Since the GAD67 isoform is highly homologous to GAD65 but is usually not a target of the GAD autoantibodies in IDDM sera, we created six GAD65/GAD67 chimeric proteins to maintain the overall GAD protein conformation and used these chimeric proteins to map conformation-dependent epitopes of GAD65 targeted by IDDM sera.
178 7532143 We find that the GAD binding present in most IDDM sera (n = 11 of 12) is composed of two distinct GAD antibody specificities that target different conformation-dependent regions of the GAD65 protein, one that is located between amino acids 240 and 435 (termed IDDM-E1) and one that is located between amino acids 451 and 570 (termed IDDM-E2).
179 7532143 Identification of epitopes targeted by IDDM sera may allow one to distinguish between GAD antibody-positive individuals at high and low risk of developing IDDM and to determine if differences in the autoimmune repertoire directed at GAD are present.
180 7532143 The chimeric GAD65/GAD67 proteins may also be useful in designing GAD assays specific for IDDM.
181 7532577 Glutamic acid decarboxylase (GAD), a target of both autoantibodies and autoreactive T-cells in insulin-dependent diabetes (IDD), exists as two homologous forms, GAD65 and GAD67.
182 7532577 GAD65 is preferentially expressed in human islets and recognized by autoantibodies in IDD, but which form primarily elicits GAD autoimmunity is unknown.
183 7532577 In ribonuclease protection assays, both forms of GAD messenger RNA (mRNA) were detected in human islets, although GAD65 mRNA was 200 times more abundant than GAD67 mRNA.
184 7532577 Immunoblotting of islets with GAD form-specific antisera revealed GAD65, but not GAD67.
185 7532577 Although GAD67 may share cross-reactive epitopes with GAD65, these findings do not exclude the possibility that autoimmunity to GAD arises as a consequence of the aberrant up-regulation of GAD67 in human islets.
186 7532577 Glutamic acid decarboxylase (GAD), a target of both autoantibodies and autoreactive T-cells in insulin-dependent diabetes (IDD), exists as two homologous forms, GAD65 and GAD67.
187 7532577 GAD65 is preferentially expressed in human islets and recognized by autoantibodies in IDD, but which form primarily elicits GAD autoimmunity is unknown.
188 7532577 In ribonuclease protection assays, both forms of GAD messenger RNA (mRNA) were detected in human islets, although GAD65 mRNA was 200 times more abundant than GAD67 mRNA.
189 7532577 Immunoblotting of islets with GAD form-specific antisera revealed GAD65, but not GAD67.
190 7532577 Although GAD67 may share cross-reactive epitopes with GAD65, these findings do not exclude the possibility that autoimmunity to GAD arises as a consequence of the aberrant up-regulation of GAD67 in human islets.
191 7532577 Glutamic acid decarboxylase (GAD), a target of both autoantibodies and autoreactive T-cells in insulin-dependent diabetes (IDD), exists as two homologous forms, GAD65 and GAD67.
192 7532577 GAD65 is preferentially expressed in human islets and recognized by autoantibodies in IDD, but which form primarily elicits GAD autoimmunity is unknown.
193 7532577 In ribonuclease protection assays, both forms of GAD messenger RNA (mRNA) were detected in human islets, although GAD65 mRNA was 200 times more abundant than GAD67 mRNA.
194 7532577 Immunoblotting of islets with GAD form-specific antisera revealed GAD65, but not GAD67.
195 7532577 Although GAD67 may share cross-reactive epitopes with GAD65, these findings do not exclude the possibility that autoimmunity to GAD arises as a consequence of the aberrant up-regulation of GAD67 in human islets.
196 7532577 Glutamic acid decarboxylase (GAD), a target of both autoantibodies and autoreactive T-cells in insulin-dependent diabetes (IDD), exists as two homologous forms, GAD65 and GAD67.
197 7532577 GAD65 is preferentially expressed in human islets and recognized by autoantibodies in IDD, but which form primarily elicits GAD autoimmunity is unknown.
198 7532577 In ribonuclease protection assays, both forms of GAD messenger RNA (mRNA) were detected in human islets, although GAD65 mRNA was 200 times more abundant than GAD67 mRNA.
199 7532577 Immunoblotting of islets with GAD form-specific antisera revealed GAD65, but not GAD67.
200 7532577 Although GAD67 may share cross-reactive epitopes with GAD65, these findings do not exclude the possibility that autoimmunity to GAD arises as a consequence of the aberrant up-regulation of GAD67 in human islets.
201 7532577 Glutamic acid decarboxylase (GAD), a target of both autoantibodies and autoreactive T-cells in insulin-dependent diabetes (IDD), exists as two homologous forms, GAD65 and GAD67.
202 7532577 GAD65 is preferentially expressed in human islets and recognized by autoantibodies in IDD, but which form primarily elicits GAD autoimmunity is unknown.
203 7532577 In ribonuclease protection assays, both forms of GAD messenger RNA (mRNA) were detected in human islets, although GAD65 mRNA was 200 times more abundant than GAD67 mRNA.
204 7532577 Immunoblotting of islets with GAD form-specific antisera revealed GAD65, but not GAD67.
205 7532577 Although GAD67 may share cross-reactive epitopes with GAD65, these findings do not exclude the possibility that autoimmunity to GAD arises as a consequence of the aberrant up-regulation of GAD67 in human islets.
206 7556984 Identification of islet autoantigens offers the possibility that antibody tests other than islet cell antibodies may be used for assessing risk of insulin-dependent diabetes mellitus (IDDM).
207 7556984 Islet cell antibodies, antibodies to glutamic acid decarboxylase (GAD)65, 37,000/40,000 M(r) islet tryptic fragments, carboxypeptidase-H, and islet cell autoantigen (ICA)69 were measured in sera from 100 newly-diagnosed IDDM patients, 27 individuals prior to onset of IDDM, and 83 control subjects.
208 7556984 Islet cell antibodies were detected in 88% of IDDM patients and 81% with pre-IDDM, GAD65 antibodies in 70% of IDDM patients and 89% with pre-IDDM, and antibodies to 37,000/40,000 M(r) islet tryptic fragments in 54% of IDDM patients and in 48% with pre-IDDM.
209 7556984 All 20 IDDM patients and the 3 pre-IDDM subjects who had islet cell antibodies without GAD65 antibodies had antibodies to 37,000/40,000 M(r) islet tryptic fragments, and all but one had disease onset before age 15 years.
210 7556984 The findings suggest that none of the single antibody specificities are as sensitive as islet cell antibodies, but that a combination of GAD65 antibodies and antibodies to 37,000/40,000 M(r) islet tryptic fragments has the potential to identify more than 90% of future cases of IDDM.
211 7556984 Identification of islet autoantigens offers the possibility that antibody tests other than islet cell antibodies may be used for assessing risk of insulin-dependent diabetes mellitus (IDDM).
212 7556984 Islet cell antibodies, antibodies to glutamic acid decarboxylase (GAD)65, 37,000/40,000 M(r) islet tryptic fragments, carboxypeptidase-H, and islet cell autoantigen (ICA)69 were measured in sera from 100 newly-diagnosed IDDM patients, 27 individuals prior to onset of IDDM, and 83 control subjects.
213 7556984 Islet cell antibodies were detected in 88% of IDDM patients and 81% with pre-IDDM, GAD65 antibodies in 70% of IDDM patients and 89% with pre-IDDM, and antibodies to 37,000/40,000 M(r) islet tryptic fragments in 54% of IDDM patients and in 48% with pre-IDDM.
214 7556984 All 20 IDDM patients and the 3 pre-IDDM subjects who had islet cell antibodies without GAD65 antibodies had antibodies to 37,000/40,000 M(r) islet tryptic fragments, and all but one had disease onset before age 15 years.
215 7556984 The findings suggest that none of the single antibody specificities are as sensitive as islet cell antibodies, but that a combination of GAD65 antibodies and antibodies to 37,000/40,000 M(r) islet tryptic fragments has the potential to identify more than 90% of future cases of IDDM.
216 7556984 Identification of islet autoantigens offers the possibility that antibody tests other than islet cell antibodies may be used for assessing risk of insulin-dependent diabetes mellitus (IDDM).
217 7556984 Islet cell antibodies, antibodies to glutamic acid decarboxylase (GAD)65, 37,000/40,000 M(r) islet tryptic fragments, carboxypeptidase-H, and islet cell autoantigen (ICA)69 were measured in sera from 100 newly-diagnosed IDDM patients, 27 individuals prior to onset of IDDM, and 83 control subjects.
218 7556984 Islet cell antibodies were detected in 88% of IDDM patients and 81% with pre-IDDM, GAD65 antibodies in 70% of IDDM patients and 89% with pre-IDDM, and antibodies to 37,000/40,000 M(r) islet tryptic fragments in 54% of IDDM patients and in 48% with pre-IDDM.
219 7556984 All 20 IDDM patients and the 3 pre-IDDM subjects who had islet cell antibodies without GAD65 antibodies had antibodies to 37,000/40,000 M(r) islet tryptic fragments, and all but one had disease onset before age 15 years.
220 7556984 The findings suggest that none of the single antibody specificities are as sensitive as islet cell antibodies, but that a combination of GAD65 antibodies and antibodies to 37,000/40,000 M(r) islet tryptic fragments has the potential to identify more than 90% of future cases of IDDM.
221 7561152 GAD65 autoantibodies occur frequently in insulin-dependent diabetic patients and is a useful marker for IDDM.
222 7561152 In an immunoassay to detect autoantibodies against the proinsulin converting enzyme 2 (PC-2) no such antibodies were detected in IDDM patients.
223 7578849 Association between antibodies to the MR 67,000 isoform of glutamate decarboxylase (GAD) and type 1 (insulin-dependent) diabetes mellitus with coexisting autoimmune polyendocrine syndrome type II.
224 7578849 By using an immunoprecipitation assay, we analysed reactivity of autoantibodies to human recombinant GAD65 and GAD67 in sera from patients with autoimmune polyendocrine syndrome Type II (APS II) with and without Type 1 (insulin-dependent) diabetes mellitus (IDDM) compared to patients with organ-specific autoimmunity.
225 7578849 Overall antibodies to GAD65 were correlated with IDDM in all study groups, whereas GAD67 antibodies were associated with IDDM when APS II coexists.
226 7578849 Antibodies to GAD65 and GAD67 were detected in 13 (44.8%) and 7 (24.1%) out of 29 APS II patients with IDDM, but in only 4 (13.8%) and 2 (6.9%) out of 29 APS II patients without IDDM, respectively (p < 0.05).
227 7578849 In short-standing IDDM (< 1 year), antibodies to GAD67 were significantly more frequent in patients with APS II (5 of 9 [55.6%] subjects) compared to matched diabetic patients without coexisting polyendocrinopathy (1 of 18 [5.6%] subjects) (p < 0.02).
228 7578849 The levels of GAD65 (142 +/- 90 AU) and GAD67 antibodies (178 +/- 95 AU) were significantly higher in patients with polyglandular disease than in patients with isolated IDDM (91 +/- 85 AU and 93 +/- 57 AU) (p < 0.02).
229 7578849 No correlation was observed between GAD antibodies and age, sex or any particular associated autoimmune disease, besides IDDM.
230 7578849 Association between antibodies to the MR 67,000 isoform of glutamate decarboxylase (GAD) and type 1 (insulin-dependent) diabetes mellitus with coexisting autoimmune polyendocrine syndrome type II.
231 7578849 By using an immunoprecipitation assay, we analysed reactivity of autoantibodies to human recombinant GAD65 and GAD67 in sera from patients with autoimmune polyendocrine syndrome Type II (APS II) with and without Type 1 (insulin-dependent) diabetes mellitus (IDDM) compared to patients with organ-specific autoimmunity.
232 7578849 Overall antibodies to GAD65 were correlated with IDDM in all study groups, whereas GAD67 antibodies were associated with IDDM when APS II coexists.
233 7578849 Antibodies to GAD65 and GAD67 were detected in 13 (44.8%) and 7 (24.1%) out of 29 APS II patients with IDDM, but in only 4 (13.8%) and 2 (6.9%) out of 29 APS II patients without IDDM, respectively (p < 0.05).
234 7578849 In short-standing IDDM (< 1 year), antibodies to GAD67 were significantly more frequent in patients with APS II (5 of 9 [55.6%] subjects) compared to matched diabetic patients without coexisting polyendocrinopathy (1 of 18 [5.6%] subjects) (p < 0.02).
235 7578849 The levels of GAD65 (142 +/- 90 AU) and GAD67 antibodies (178 +/- 95 AU) were significantly higher in patients with polyglandular disease than in patients with isolated IDDM (91 +/- 85 AU and 93 +/- 57 AU) (p < 0.02).
236 7578849 No correlation was observed between GAD antibodies and age, sex or any particular associated autoimmune disease, besides IDDM.
237 7578849 Association between antibodies to the MR 67,000 isoform of glutamate decarboxylase (GAD) and type 1 (insulin-dependent) diabetes mellitus with coexisting autoimmune polyendocrine syndrome type II.
238 7578849 By using an immunoprecipitation assay, we analysed reactivity of autoantibodies to human recombinant GAD65 and GAD67 in sera from patients with autoimmune polyendocrine syndrome Type II (APS II) with and without Type 1 (insulin-dependent) diabetes mellitus (IDDM) compared to patients with organ-specific autoimmunity.
239 7578849 Overall antibodies to GAD65 were correlated with IDDM in all study groups, whereas GAD67 antibodies were associated with IDDM when APS II coexists.
240 7578849 Antibodies to GAD65 and GAD67 were detected in 13 (44.8%) and 7 (24.1%) out of 29 APS II patients with IDDM, but in only 4 (13.8%) and 2 (6.9%) out of 29 APS II patients without IDDM, respectively (p < 0.05).
241 7578849 In short-standing IDDM (< 1 year), antibodies to GAD67 were significantly more frequent in patients with APS II (5 of 9 [55.6%] subjects) compared to matched diabetic patients without coexisting polyendocrinopathy (1 of 18 [5.6%] subjects) (p < 0.02).
242 7578849 The levels of GAD65 (142 +/- 90 AU) and GAD67 antibodies (178 +/- 95 AU) were significantly higher in patients with polyglandular disease than in patients with isolated IDDM (91 +/- 85 AU and 93 +/- 57 AU) (p < 0.02).
243 7578849 No correlation was observed between GAD antibodies and age, sex or any particular associated autoimmune disease, besides IDDM.
244 7578849 Association between antibodies to the MR 67,000 isoform of glutamate decarboxylase (GAD) and type 1 (insulin-dependent) diabetes mellitus with coexisting autoimmune polyendocrine syndrome type II.
245 7578849 By using an immunoprecipitation assay, we analysed reactivity of autoantibodies to human recombinant GAD65 and GAD67 in sera from patients with autoimmune polyendocrine syndrome Type II (APS II) with and without Type 1 (insulin-dependent) diabetes mellitus (IDDM) compared to patients with organ-specific autoimmunity.
246 7578849 Overall antibodies to GAD65 were correlated with IDDM in all study groups, whereas GAD67 antibodies were associated with IDDM when APS II coexists.
247 7578849 Antibodies to GAD65 and GAD67 were detected in 13 (44.8%) and 7 (24.1%) out of 29 APS II patients with IDDM, but in only 4 (13.8%) and 2 (6.9%) out of 29 APS II patients without IDDM, respectively (p < 0.05).
248 7578849 In short-standing IDDM (< 1 year), antibodies to GAD67 were significantly more frequent in patients with APS II (5 of 9 [55.6%] subjects) compared to matched diabetic patients without coexisting polyendocrinopathy (1 of 18 [5.6%] subjects) (p < 0.02).
249 7578849 The levels of GAD65 (142 +/- 90 AU) and GAD67 antibodies (178 +/- 95 AU) were significantly higher in patients with polyglandular disease than in patients with isolated IDDM (91 +/- 85 AU and 93 +/- 57 AU) (p < 0.02).
250 7578849 No correlation was observed between GAD antibodies and age, sex or any particular associated autoimmune disease, besides IDDM.
251 7589826 The presence of serum islet cell cytoplasmic antibodies (ICAs) is a standard autoimmune marker for insulin-dependent diabetes mellitus (IDDM).
252 7589826 We tested 129 IDDM sera for antibodies to ICA512 (anti-ICA512), antibodies to GAD (anti-GAD), and ICAs; we tested for inhibition of ICAs with purified recombinant ICA512 and sheep brain GAD; and we tested for immunofluorescence reactivity on COS7 cells transfected with cDNA clones encoding ICA512 and GAD65.
253 7589826 Anti-ICA512 and anti-GAD antibodies were demonstrable by indirect immunofluorescence on transfected COS7 cells, and ICA could be inhibited using either recombinant ICA512 or purified brain GAD.
254 7594559 Identification of protein tyrosine phosphatase-like IA2 (islet cell antigen 512) as the insulin-dependent diabetes-related 37/40K autoantigen and a target of islet-cell antibodies.
255 7594559 The majority of patients with insulin-dependent diabetes (IDDM) have Abs to 40- and/or 37-kDa tryptic fragments (37/40K-Abs) deriving from an unidentified islet cell membrane protein distinct from glutamate decarboxylase (GAD).
256 7594559 Recently, autoantibodies against ICA512, which has identity with the protein tyrosine phosphatase-like protein IA2, were reported.
257 7594559 Combined detection of Abs to IA2 and GAD65 in a single radio-binding assay identified Abs in 88 of 100 IDDM patients, and potentially facilitates population screening for IDDM risk assessment.
258 7681990 All the MICAs specifically recognized the smaller GAD protein, GAD65, and did not recognize the nonallelic GAD67 protein.
259 7714099 Activation of T lymphocyte subsets by synthetic TSH receptor peptides and recombinant glutamate decarboxylase in autoimmune thyroid disease and insulin-dependent diabetes.
260 7714099 In this context, we have measured the proliferative responses of peripheral blood mononuclear cells (PBMC) to the synthetic peptides corresponding to the extracellular domain of the TSH receptor (TSHR) and recombinant glutamate decarboxylase (GAD65) by means of 3H thymidine incorporation.
261 7714099 We have also studied the antigenic activation of CD4+ and CD8+ T lymphocytes by measuring human leukocyte antigen-DR (HLA-DR) expression on the cell surface by flow cytometric analysis.
262 7714099 PBMC obtained from 47 patients with Graves' disease (GD) [including 19 hyperthyroid GD (hyper GD)], 18 with Hashimoto's thyroiditis (HT), 7 with nontoxic nodular goiter (NG), 18 with insulin-dependent diabetes (IDDM), and 20 normal controls (N), were cultured for 7 days in the presence or absence of the pool peptides representing 3 different segments of TSHR or GAD65 at final concentration of 30 micrograms/mL or 10 micrograms/mL.
263 7714099 The proportion of subjects whose PBMC gave a positive proliferative response with a stimulation index (SI) of over 2.3 (i.e. above the mean +2 SD for N) to TSHR peptides was significantly higher in the hyper GD group than among euthyroid GD (eu GD), HT, IDDM, and N group.
264 7714099 The CD4+ T lymphocytes from hyper GD group were significantly more activated by TSHR peptides compared to eu GD, HT, IDDM, and N, and this induction correlated to their thyroid hormone levels.
265 7714099 Quite differently, the activation of CD8+ T lymphocytes from both hyper GD and eu GD group in response to TSHR peptides was impaired compared to HT, IDDM, and the N group; in contrast to the findings with CD4+ T lymphocytes, this was independent of thyroid hormone levels.
266 7714099 On the other hand, while the CD8+ T lymphocytes from GD and N groups were activated equally by GAD65, the activation of CD8+ T lymphocytes from the IDDM group by GAD65 was impaired compared to the GD and N groups.
267 7714099 In conclusion, the activation of CD8+ T lymphocytes from GD and IDDM by relevant antigens (i.e.
268 7714099 TSHR peptides for GD and GAD65 for IDDM) was impaired, but not by irrelevant antigens (i.e.
269 7714099 GAD65 for GD and TSHR peptides for IDDM).
270 7714099 There was also a modest stimulation of CD8+ T cells from all groups by tetanus toxoid and cardiac myosin light chain peptide, both irrelevant antigens.
271 7714099 Activation of T lymphocyte subsets by synthetic TSH receptor peptides and recombinant glutamate decarboxylase in autoimmune thyroid disease and insulin-dependent diabetes.
272 7714099 In this context, we have measured the proliferative responses of peripheral blood mononuclear cells (PBMC) to the synthetic peptides corresponding to the extracellular domain of the TSH receptor (TSHR) and recombinant glutamate decarboxylase (GAD65) by means of 3H thymidine incorporation.
273 7714099 We have also studied the antigenic activation of CD4+ and CD8+ T lymphocytes by measuring human leukocyte antigen-DR (HLA-DR) expression on the cell surface by flow cytometric analysis.
274 7714099 PBMC obtained from 47 patients with Graves' disease (GD) [including 19 hyperthyroid GD (hyper GD)], 18 with Hashimoto's thyroiditis (HT), 7 with nontoxic nodular goiter (NG), 18 with insulin-dependent diabetes (IDDM), and 20 normal controls (N), were cultured for 7 days in the presence or absence of the pool peptides representing 3 different segments of TSHR or GAD65 at final concentration of 30 micrograms/mL or 10 micrograms/mL.
275 7714099 The proportion of subjects whose PBMC gave a positive proliferative response with a stimulation index (SI) of over 2.3 (i.e. above the mean +2 SD for N) to TSHR peptides was significantly higher in the hyper GD group than among euthyroid GD (eu GD), HT, IDDM, and N group.
276 7714099 The CD4+ T lymphocytes from hyper GD group were significantly more activated by TSHR peptides compared to eu GD, HT, IDDM, and N, and this induction correlated to their thyroid hormone levels.
277 7714099 Quite differently, the activation of CD8+ T lymphocytes from both hyper GD and eu GD group in response to TSHR peptides was impaired compared to HT, IDDM, and the N group; in contrast to the findings with CD4+ T lymphocytes, this was independent of thyroid hormone levels.
278 7714099 On the other hand, while the CD8+ T lymphocytes from GD and N groups were activated equally by GAD65, the activation of CD8+ T lymphocytes from the IDDM group by GAD65 was impaired compared to the GD and N groups.
279 7714099 In conclusion, the activation of CD8+ T lymphocytes from GD and IDDM by relevant antigens (i.e.
280 7714099 TSHR peptides for GD and GAD65 for IDDM) was impaired, but not by irrelevant antigens (i.e.
281 7714099 GAD65 for GD and TSHR peptides for IDDM).
282 7714099 There was also a modest stimulation of CD8+ T cells from all groups by tetanus toxoid and cardiac myosin light chain peptide, both irrelevant antigens.
283 7714099 Activation of T lymphocyte subsets by synthetic TSH receptor peptides and recombinant glutamate decarboxylase in autoimmune thyroid disease and insulin-dependent diabetes.
284 7714099 In this context, we have measured the proliferative responses of peripheral blood mononuclear cells (PBMC) to the synthetic peptides corresponding to the extracellular domain of the TSH receptor (TSHR) and recombinant glutamate decarboxylase (GAD65) by means of 3H thymidine incorporation.
285 7714099 We have also studied the antigenic activation of CD4+ and CD8+ T lymphocytes by measuring human leukocyte antigen-DR (HLA-DR) expression on the cell surface by flow cytometric analysis.
286 7714099 PBMC obtained from 47 patients with Graves' disease (GD) [including 19 hyperthyroid GD (hyper GD)], 18 with Hashimoto's thyroiditis (HT), 7 with nontoxic nodular goiter (NG), 18 with insulin-dependent diabetes (IDDM), and 20 normal controls (N), were cultured for 7 days in the presence or absence of the pool peptides representing 3 different segments of TSHR or GAD65 at final concentration of 30 micrograms/mL or 10 micrograms/mL.
287 7714099 The proportion of subjects whose PBMC gave a positive proliferative response with a stimulation index (SI) of over 2.3 (i.e. above the mean +2 SD for N) to TSHR peptides was significantly higher in the hyper GD group than among euthyroid GD (eu GD), HT, IDDM, and N group.
288 7714099 The CD4+ T lymphocytes from hyper GD group were significantly more activated by TSHR peptides compared to eu GD, HT, IDDM, and N, and this induction correlated to their thyroid hormone levels.
289 7714099 Quite differently, the activation of CD8+ T lymphocytes from both hyper GD and eu GD group in response to TSHR peptides was impaired compared to HT, IDDM, and the N group; in contrast to the findings with CD4+ T lymphocytes, this was independent of thyroid hormone levels.
290 7714099 On the other hand, while the CD8+ T lymphocytes from GD and N groups were activated equally by GAD65, the activation of CD8+ T lymphocytes from the IDDM group by GAD65 was impaired compared to the GD and N groups.
291 7714099 In conclusion, the activation of CD8+ T lymphocytes from GD and IDDM by relevant antigens (i.e.
292 7714099 TSHR peptides for GD and GAD65 for IDDM) was impaired, but not by irrelevant antigens (i.e.
293 7714099 GAD65 for GD and TSHR peptides for IDDM).
294 7714099 There was also a modest stimulation of CD8+ T cells from all groups by tetanus toxoid and cardiac myosin light chain peptide, both irrelevant antigens.
295 7714099 Activation of T lymphocyte subsets by synthetic TSH receptor peptides and recombinant glutamate decarboxylase in autoimmune thyroid disease and insulin-dependent diabetes.
296 7714099 In this context, we have measured the proliferative responses of peripheral blood mononuclear cells (PBMC) to the synthetic peptides corresponding to the extracellular domain of the TSH receptor (TSHR) and recombinant glutamate decarboxylase (GAD65) by means of 3H thymidine incorporation.
297 7714099 We have also studied the antigenic activation of CD4+ and CD8+ T lymphocytes by measuring human leukocyte antigen-DR (HLA-DR) expression on the cell surface by flow cytometric analysis.
298 7714099 PBMC obtained from 47 patients with Graves' disease (GD) [including 19 hyperthyroid GD (hyper GD)], 18 with Hashimoto's thyroiditis (HT), 7 with nontoxic nodular goiter (NG), 18 with insulin-dependent diabetes (IDDM), and 20 normal controls (N), were cultured for 7 days in the presence or absence of the pool peptides representing 3 different segments of TSHR or GAD65 at final concentration of 30 micrograms/mL or 10 micrograms/mL.
299 7714099 The proportion of subjects whose PBMC gave a positive proliferative response with a stimulation index (SI) of over 2.3 (i.e. above the mean +2 SD for N) to TSHR peptides was significantly higher in the hyper GD group than among euthyroid GD (eu GD), HT, IDDM, and N group.
300 7714099 The CD4+ T lymphocytes from hyper GD group were significantly more activated by TSHR peptides compared to eu GD, HT, IDDM, and N, and this induction correlated to their thyroid hormone levels.
301 7714099 Quite differently, the activation of CD8+ T lymphocytes from both hyper GD and eu GD group in response to TSHR peptides was impaired compared to HT, IDDM, and the N group; in contrast to the findings with CD4+ T lymphocytes, this was independent of thyroid hormone levels.
302 7714099 On the other hand, while the CD8+ T lymphocytes from GD and N groups were activated equally by GAD65, the activation of CD8+ T lymphocytes from the IDDM group by GAD65 was impaired compared to the GD and N groups.
303 7714099 In conclusion, the activation of CD8+ T lymphocytes from GD and IDDM by relevant antigens (i.e.
304 7714099 TSHR peptides for GD and GAD65 for IDDM) was impaired, but not by irrelevant antigens (i.e.
305 7714099 GAD65 for GD and TSHR peptides for IDDM).
306 7714099 There was also a modest stimulation of CD8+ T cells from all groups by tetanus toxoid and cardiac myosin light chain peptide, both irrelevant antigens.
307 7714099 Activation of T lymphocyte subsets by synthetic TSH receptor peptides and recombinant glutamate decarboxylase in autoimmune thyroid disease and insulin-dependent diabetes.
308 7714099 In this context, we have measured the proliferative responses of peripheral blood mononuclear cells (PBMC) to the synthetic peptides corresponding to the extracellular domain of the TSH receptor (TSHR) and recombinant glutamate decarboxylase (GAD65) by means of 3H thymidine incorporation.
309 7714099 We have also studied the antigenic activation of CD4+ and CD8+ T lymphocytes by measuring human leukocyte antigen-DR (HLA-DR) expression on the cell surface by flow cytometric analysis.
310 7714099 PBMC obtained from 47 patients with Graves' disease (GD) [including 19 hyperthyroid GD (hyper GD)], 18 with Hashimoto's thyroiditis (HT), 7 with nontoxic nodular goiter (NG), 18 with insulin-dependent diabetes (IDDM), and 20 normal controls (N), were cultured for 7 days in the presence or absence of the pool peptides representing 3 different segments of TSHR or GAD65 at final concentration of 30 micrograms/mL or 10 micrograms/mL.
311 7714099 The proportion of subjects whose PBMC gave a positive proliferative response with a stimulation index (SI) of over 2.3 (i.e. above the mean +2 SD for N) to TSHR peptides was significantly higher in the hyper GD group than among euthyroid GD (eu GD), HT, IDDM, and N group.
312 7714099 The CD4+ T lymphocytes from hyper GD group were significantly more activated by TSHR peptides compared to eu GD, HT, IDDM, and N, and this induction correlated to their thyroid hormone levels.
313 7714099 Quite differently, the activation of CD8+ T lymphocytes from both hyper GD and eu GD group in response to TSHR peptides was impaired compared to HT, IDDM, and the N group; in contrast to the findings with CD4+ T lymphocytes, this was independent of thyroid hormone levels.
314 7714099 On the other hand, while the CD8+ T lymphocytes from GD and N groups were activated equally by GAD65, the activation of CD8+ T lymphocytes from the IDDM group by GAD65 was impaired compared to the GD and N groups.
315 7714099 In conclusion, the activation of CD8+ T lymphocytes from GD and IDDM by relevant antigens (i.e.
316 7714099 TSHR peptides for GD and GAD65 for IDDM) was impaired, but not by irrelevant antigens (i.e.
317 7714099 GAD65 for GD and TSHR peptides for IDDM).
318 7714099 There was also a modest stimulation of CD8+ T cells from all groups by tetanus toxoid and cardiac myosin light chain peptide, both irrelevant antigens.
319 7722468 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease that results in the destruction of the pancreatic islet beta cells.
320 7722468 Glutamic acid decarboxylase (GAD) has been recently indicated as a key autoantigen in the induction of IDDM in nonobese diabetic mice.
321 7722468 GAD65 peptides displaying the human histocompatibility leukocyte antigen (HLA)-A*0201 binding motif have been synthesized.
322 7722468 In three cases (one preclinical IDDM and two recent-onset IDDM), we detected specific killing of autologous antigen-presenting cells when incubated with GAD114-123 peptide or when infected with a recombinant vaccinia virus expressing GAD65.
323 7722468 Our finding suggests that GAD-specific cytotoxic T lymphocytes may play a critical role in the initial events of IDDM.
324 7722468 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease that results in the destruction of the pancreatic islet beta cells.
325 7722468 Glutamic acid decarboxylase (GAD) has been recently indicated as a key autoantigen in the induction of IDDM in nonobese diabetic mice.
326 7722468 GAD65 peptides displaying the human histocompatibility leukocyte antigen (HLA)-A*0201 binding motif have been synthesized.
327 7722468 In three cases (one preclinical IDDM and two recent-onset IDDM), we detected specific killing of autologous antigen-presenting cells when incubated with GAD114-123 peptide or when infected with a recombinant vaccinia virus expressing GAD65.
328 7722468 Our finding suggests that GAD-specific cytotoxic T lymphocytes may play a critical role in the initial events of IDDM.
329 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
330 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
331 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
332 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
333 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
334 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
335 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
336 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
337 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
338 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
339 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
340 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
341 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
342 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
343 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
344 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
345 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
346 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
347 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
348 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
349 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
350 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
351 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
352 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
353 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
354 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
355 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
356 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
357 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
358 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
359 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
360 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
361 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
362 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
363 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
364 7734039 Autoantibodies against glutamic acid decarboxylase 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM).
365 7734039 Glutamic acid decarboxylase (GAD) 65 antibodies were measured by a new quantitative immunoprecipitation followed by immunoblotting assay using Chinese hamster ovary cells to produce recombinant human islet GAD65 and were compared with islet cell antibodies (ICA), antibodies against 64,000-Mr islet cell proteins (64K antibodies) and antibodies against GAD purified from pig brain.
366 7734039 GAD65 antibodies were assayed in 32 Japanese patients with insulin-dependent diabetes mellitus (IDDM), 25 patients with non-insulin-dependent diabetes mellitus (NIDDM and 25 healthy volunteers.
367 7734039 GAD65 antibodies were found in 12 (80.0%) of 15 patients with newly-diagnosed IDDM and in 9 (52.9%) of 17 patients with long-term IDDM.
368 7734039 GAD65 antibodies and antibodies against GAD purified from pig brain correlated well (r = 0.70, P = 0.0001).
369 7734039 The concordance between GAD65 antibodies and ICA, 64K antibodies, and antibodies against GAD purified from pig brain, including GAD65 and GAD67, were 87.5% (28/32), 75.0% (24/32) and 90.6% (29/32), respectively.
370 7734039 We observed that a quantitative immunoprecipitation followed by immunoblotting assay had high sensitivity and specificity in detecting GAD65 antibodies, that the prevalence of GAD65 antibodies was as high as in Caucasians, and that GAD65 was also one of the major autoantigens in Japanese patients with IDDM.
371 7772701 Glutamic acid decarboxylase antibodies (GAD65Ab) are common in new onset Caucasian insulin-dependent diabetic (IDDM) patients but it is unclear if this marker is also prevalent in patients of other ethnic backgrounds.
372 7772701 We determined antibodies against human recombinant GAD in Japanese diabetic patients using a radioimmunoassay with competition between in vitro translated 35S-GAD65 and non-labelled recombinant human GAD65 (rhGAD65).
373 7772701 Our data are consistent with a strong association of GAD65Ab also in Japanese IDDM, and suggest that, when present, GAD67Ab are frequently directed to epitope(s) common to GAD65 and GAD67.
374 7772701 Glutamic acid decarboxylase antibodies (GAD65Ab) are common in new onset Caucasian insulin-dependent diabetic (IDDM) patients but it is unclear if this marker is also prevalent in patients of other ethnic backgrounds.
375 7772701 We determined antibodies against human recombinant GAD in Japanese diabetic patients using a radioimmunoassay with competition between in vitro translated 35S-GAD65 and non-labelled recombinant human GAD65 (rhGAD65).
376 7772701 Our data are consistent with a strong association of GAD65Ab also in Japanese IDDM, and suggest that, when present, GAD67Ab are frequently directed to epitope(s) common to GAD65 and GAD67.
377 7783365 Since it was reported that the 64kD antigen that had been found to be the target of autoantibodies in the sera from IDDM patients was the same as GAD, GAD antibodies have been one of the focuses of many investigations.
378 7783365 To confirm the relevance of pig GAD as the target antigen, we compared the sequences and antigenic activities among pig, rat and recombinant human GAD65.
379 7806022 Furthermore, one of the three islet cell antibody negative individuals who developed IDDM was GAD65 antibody positive both in 1976 and in 1989.
380 7809009 Glutamic acid decarboxylase (GAD) is a candidate target autoantigen involved in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
381 7809009 Using GAD isoform-specific antibodies in an immunoblot assay, we found that expression of both GAD-65 and GAD-67 in cultured islets was glucose dependent and that increased expression of both forms of GAD correlated with increased functional state of the beta cell.
382 7821743 The clinical onset of insulin-dependent diabetes is associated with several autoimmune phenomena including islet cell antibodies, glutamic acid decarboxylase (the GAD65 isoform) autoantibodies (GAD65Ab) as well as insulin autoantibodies.
383 7821743 The autoreactive sites or epitopes of GAD65 and insulin remain to be determined.
384 7821743 The clinical onset of insulin-dependent diabetes is associated with several autoimmune phenomena including islet cell antibodies, glutamic acid decarboxylase (the GAD65 isoform) autoantibodies (GAD65Ab) as well as insulin autoantibodies.
385 7821743 The autoreactive sites or epitopes of GAD65 and insulin remain to be determined.
386 7822765 Dual immunostaining with GAD isoform-specific antibodies and polyclonal antibodies to glucagon showed that GAD65 was primarily detected in rat pancreatic islet beta-cells, whereas alpha-cells had weak GAD65 staining.
387 7822765 These data demonstrate that antibodies raised against the N-terminus of GAD allow differential immunocytochemical identification of GAD67 and GAD65.
388 7822765 Differential expression of GAD isoforms within islet alpha- and beta-cells supports the role of GAD65 in autoimmune diabetes and stiff-man syndrome.
389 7822765 Dual immunostaining with GAD isoform-specific antibodies and polyclonal antibodies to glucagon showed that GAD65 was primarily detected in rat pancreatic islet beta-cells, whereas alpha-cells had weak GAD65 staining.
390 7822765 These data demonstrate that antibodies raised against the N-terminus of GAD allow differential immunocytochemical identification of GAD67 and GAD65.
391 7822765 Differential expression of GAD isoforms within islet alpha- and beta-cells supports the role of GAD65 in autoimmune diabetes and stiff-man syndrome.
392 7822765 Dual immunostaining with GAD isoform-specific antibodies and polyclonal antibodies to glucagon showed that GAD65 was primarily detected in rat pancreatic islet beta-cells, whereas alpha-cells had weak GAD65 staining.
393 7822765 These data demonstrate that antibodies raised against the N-terminus of GAD allow differential immunocytochemical identification of GAD67 and GAD65.
394 7822765 Differential expression of GAD isoforms within islet alpha- and beta-cells supports the role of GAD65 in autoimmune diabetes and stiff-man syndrome.
395 7833679 In human AITD, recent studies have demonstrated that CD8+ (suppressor/cytotoxic) and CD8+CD11b+ ("pure suppressor") cells are activated by irrelevant antigen normally, but are significantly less well activated in response to thyroglobulin or thyroperoxidase.
396 7833679 In further similar studies, CD8+ cells from patients with Graves' disease (GD) are induced normally in response to glutamic acid decarboxylase-65 (GAD-65), the putative beta cell antigen important in insulin-dependent diabetes mellitus (IDDM), but significantly less to synthetic TSH receptor (TSHR).
397 7833679 Conversely, CD8+ cells from patients with IDDM are activated normally in response to TSHR, but significantly less to GAD-65.
398 7833679 In human AITD, recent studies have demonstrated that CD8+ (suppressor/cytotoxic) and CD8+CD11b+ ("pure suppressor") cells are activated by irrelevant antigen normally, but are significantly less well activated in response to thyroglobulin or thyroperoxidase.
399 7833679 In further similar studies, CD8+ cells from patients with Graves' disease (GD) are induced normally in response to glutamic acid decarboxylase-65 (GAD-65), the putative beta cell antigen important in insulin-dependent diabetes mellitus (IDDM), but significantly less to synthetic TSH receptor (TSHR).
400 7833679 Conversely, CD8+ cells from patients with IDDM are activated normally in response to TSHR, but significantly less to GAD-65.
401 7840855 Type 1 diabetes in man and the NOD (H-2g7) mouse is frequently associated with an autoimmune response to two isoforms of glutamic acid decarboxylase (GAD), GAD65 and GAD67.
402 7883841 Patients with adult-onset Type 1 (insulin-dependent) diabetes mellitus (IDDM) are more difficult to identify than young patients, as their clinical onset is often less acute with a questionable state of insulin dependency.
403 7883841 Sera from 312 recent-onset IDDM patients under age 40 and 163 age-matched controls were assayed for IAA, ICA, and antibodies against recombinant GAD65 (M(r) 65,000) or GAD67 (M(r) 67,000).
404 7888042 GAD65 autoantibodies increase the predictability but not the sensitivity of islet cell and insulin autoantibodies for developing insulin dependent diabetes mellitus.
405 7926302 Glutamic acid decarboxylase (GAD65) autoantibodies in prediction of beta-cell function and remission in recent-onset IDDM after cyclosporin treatment.
406 7926302 We have investigated whether glutamic acid decarboxylase (GAD) autoantibodies (GAD65 Ab) were affected by cyclosporin therapy and were related to subsequent non-insulin-requiring remission and loss of glucagon-stimulated C-peptide response in 132 recent-onset insulin-dependent diabetes mellitus (IDDM) patients treated with cyclosporin or placebo for 12 months.
407 7926302 GAD65 Ab were found at onset in 66% (87 of 132) of IDDM patients and in 1% (1 of 100) of healthy control subjects.
408 7926302 The presence or absence of GAD65 Ab at study entry did not predict non-insulin-requiring remission in either cyclosporin- or placebo-treated patients.
409 7926302 Glutamic acid decarboxylase (GAD65) autoantibodies in prediction of beta-cell function and remission in recent-onset IDDM after cyclosporin treatment.
410 7926302 We have investigated whether glutamic acid decarboxylase (GAD) autoantibodies (GAD65 Ab) were affected by cyclosporin therapy and were related to subsequent non-insulin-requiring remission and loss of glucagon-stimulated C-peptide response in 132 recent-onset insulin-dependent diabetes mellitus (IDDM) patients treated with cyclosporin or placebo for 12 months.
411 7926302 GAD65 Ab were found at onset in 66% (87 of 132) of IDDM patients and in 1% (1 of 100) of healthy control subjects.
412 7926302 The presence or absence of GAD65 Ab at study entry did not predict non-insulin-requiring remission in either cyclosporin- or placebo-treated patients.
413 7926302 Glutamic acid decarboxylase (GAD65) autoantibodies in prediction of beta-cell function and remission in recent-onset IDDM after cyclosporin treatment.
414 7926302 We have investigated whether glutamic acid decarboxylase (GAD) autoantibodies (GAD65 Ab) were affected by cyclosporin therapy and were related to subsequent non-insulin-requiring remission and loss of glucagon-stimulated C-peptide response in 132 recent-onset insulin-dependent diabetes mellitus (IDDM) patients treated with cyclosporin or placebo for 12 months.
415 7926302 GAD65 Ab were found at onset in 66% (87 of 132) of IDDM patients and in 1% (1 of 100) of healthy control subjects.
416 7926302 The presence or absence of GAD65 Ab at study entry did not predict non-insulin-requiring remission in either cyclosporin- or placebo-treated patients.
417 7926302 Glutamic acid decarboxylase (GAD65) autoantibodies in prediction of beta-cell function and remission in recent-onset IDDM after cyclosporin treatment.
418 7926302 We have investigated whether glutamic acid decarboxylase (GAD) autoantibodies (GAD65 Ab) were affected by cyclosporin therapy and were related to subsequent non-insulin-requiring remission and loss of glucagon-stimulated C-peptide response in 132 recent-onset insulin-dependent diabetes mellitus (IDDM) patients treated with cyclosporin or placebo for 12 months.
419 7926302 GAD65 Ab were found at onset in 66% (87 of 132) of IDDM patients and in 1% (1 of 100) of healthy control subjects.
420 7926302 The presence or absence of GAD65 Ab at study entry did not predict non-insulin-requiring remission in either cyclosporin- or placebo-treated patients.
421 7958502 To test the role of glutamic acid decarboxylase (GAD65) or bovine serum albumin (BSA) autoimmunity in the pathogenesis of diabetes, GAD65 or BSA was injected intraperitoneally into neonatal female NOD mice (100 micrograms/mouse of each protein).
422 7964474 We tested this prediction using two insulin-dependent diabetes mellitus (IDDM)-associated antigens, coxsackievirus P2-C (Cox P2-C) protein and glutamate decarboxylase (GAD65), which share a prototypic sequence similarity of six consecutive amino acids within otherwise unrelated proteins.
423 7964474 We surveyed a panel of 10 murine MHC class II alleles that encompass the spectrum of standard alleles for the ability to cross-reactively present Cox P2-C and GAD65.
424 7964474 Since the human and the murine class II alleles associated with IDDM share conserved features, cross-reactive T cell recognition of GAD65 and Cox P2-C may contribute to the pathogenesis of human IDDM and account for the epidemiological association of coxsackievirus with IDDM.
425 7964474 We tested this prediction using two insulin-dependent diabetes mellitus (IDDM)-associated antigens, coxsackievirus P2-C (Cox P2-C) protein and glutamate decarboxylase (GAD65), which share a prototypic sequence similarity of six consecutive amino acids within otherwise unrelated proteins.
426 7964474 We surveyed a panel of 10 murine MHC class II alleles that encompass the spectrum of standard alleles for the ability to cross-reactively present Cox P2-C and GAD65.
427 7964474 Since the human and the murine class II alleles associated with IDDM share conserved features, cross-reactive T cell recognition of GAD65 and Cox P2-C may contribute to the pathogenesis of human IDDM and account for the epidemiological association of coxsackievirus with IDDM.
428 7964474 We tested this prediction using two insulin-dependent diabetes mellitus (IDDM)-associated antigens, coxsackievirus P2-C (Cox P2-C) protein and glutamate decarboxylase (GAD65), which share a prototypic sequence similarity of six consecutive amino acids within otherwise unrelated proteins.
429 7964474 We surveyed a panel of 10 murine MHC class II alleles that encompass the spectrum of standard alleles for the ability to cross-reactively present Cox P2-C and GAD65.
430 7964474 Since the human and the murine class II alleles associated with IDDM share conserved features, cross-reactive T cell recognition of GAD65 and Cox P2-C may contribute to the pathogenesis of human IDDM and account for the epidemiological association of coxsackievirus with IDDM.
431 8034738 In this study we have investigated the targeting signal of the 65-kD isoform of glutamic acid decarboxylase (GAD65), a major autoantigen in two autoimmune diseases: Stiff-Man syndrome and insulin-dependent diabetes mellitus.
432 8063033 Insulin-dependent diabetes mellitus (IDDM) is associated with autoreactivity against GAD but the diagnostic sensitivity (positivity in disease) and specificity (negativity in health) of isoform-specific GAD antibodies have yet to be defined in assay systems suitable for screening large number of samples.
433 8063033 One set of IDDM patient (n = 10) and control (n = 50) standard sera were used to develop quantitative antibody assays with in vitro synthesized recombinant 35S-methionine-labelled GAD65 and GAD67, respectively, and protein A-Sepharose to separate free from antibody-bound ligand.
434 8063033 In the IDDM sera, GAD65 and GAD67 antibodies were concordant in 7% (6 of 81) and GAD65 antibodies and ICA in 89% (72 of 81) without a correlation between the autoantibody levels.
435 8063033 Autoantibodies to recombinant human islet GAD65 are specific and sensitive markers for childhood IDDM in this immunoassay with in vitro synthesized 35S-methionine-labelled recombinant GAD.
436 8063033 Insulin-dependent diabetes mellitus (IDDM) is associated with autoreactivity against GAD but the diagnostic sensitivity (positivity in disease) and specificity (negativity in health) of isoform-specific GAD antibodies have yet to be defined in assay systems suitable for screening large number of samples.
437 8063033 One set of IDDM patient (n = 10) and control (n = 50) standard sera were used to develop quantitative antibody assays with in vitro synthesized recombinant 35S-methionine-labelled GAD65 and GAD67, respectively, and protein A-Sepharose to separate free from antibody-bound ligand.
438 8063033 In the IDDM sera, GAD65 and GAD67 antibodies were concordant in 7% (6 of 81) and GAD65 antibodies and ICA in 89% (72 of 81) without a correlation between the autoantibody levels.
439 8063033 Autoantibodies to recombinant human islet GAD65 are specific and sensitive markers for childhood IDDM in this immunoassay with in vitro synthesized 35S-methionine-labelled recombinant GAD.
440 8063033 Insulin-dependent diabetes mellitus (IDDM) is associated with autoreactivity against GAD but the diagnostic sensitivity (positivity in disease) and specificity (negativity in health) of isoform-specific GAD antibodies have yet to be defined in assay systems suitable for screening large number of samples.
441 8063033 One set of IDDM patient (n = 10) and control (n = 50) standard sera were used to develop quantitative antibody assays with in vitro synthesized recombinant 35S-methionine-labelled GAD65 and GAD67, respectively, and protein A-Sepharose to separate free from antibody-bound ligand.
442 8063033 In the IDDM sera, GAD65 and GAD67 antibodies were concordant in 7% (6 of 81) and GAD65 antibodies and ICA in 89% (72 of 81) without a correlation between the autoantibody levels.
443 8063033 Autoantibodies to recombinant human islet GAD65 are specific and sensitive markers for childhood IDDM in this immunoassay with in vitro synthesized 35S-methionine-labelled recombinant GAD.
444 8070615 Immune reactivity to the enzyme glutamic acid decarboxylase (GAD), a pancreatic islet autoantigen, is present at the diagnosis of insulin-dependent diabetes mellitus (IDDM).
445 8070615 Because GAD is also highly expressed in the nervous system, we investigated the presence of autoantibodies to the isoform GAD65 in patients with diabetic neuropathy, which is a debilitating complication of the disease.
446 8100786 The NOD mouse may have as many as 10 susceptibility genes, including its novel IA major histocompatibility complex antigen and a defective interferon-gamma receptor, whereas human IDDM is so far known to be encoded by cis and trans complementation products of certain DQ genes on chromosome 6q, and a gene in the insulin-like growth factor II region on chromosome 11p.
447 8100786 Islet cell antibody negative siblings of IDDM patients appear to have lower than expected abilities to secrete insulin in response to intravenous glucose.
448 8100786 Sera from patients before and/or after developing IDDM immunoprecipitate two native proteins of 64,000- and 38,000-M(r) glutamic acid decarboxylase (GAD65) reacting to conformational epitopes.
449 8100786 It can be induced by as disparate means as tuberculin antigen administration, by interleukin-4 treatments, by transfer of T-cell lines generated in autologous mixed lymphocyte responses, and by immunization to insulin B-chain, whereas oral islet cell antigens, such as insulin, can delay diabetes onset in the NOD mouse.
450 8149657 In the present study the reactivity of sera from 34 prediabetic and 15 diabetic NOD mice was tested against GAD protein present in islets of Langerhans and cerebellum, and against recombinant, semi-purified GAD-65 and GAD-67.
451 8168635 The autoimmune response that leads to destruction of pancreatic islet beta-cells and insulin-dependent diabetes mellitus (IDDM) has a genetic basis; however, environmental factors can exert profound modulating effects on the genetic predisposition to this autoimmune response.
452 8168635 Thus, recent studies in NOD mice suggest that the islet beta-cell-directed autoimmune response may be mediated by a T-helper 1 (Th1) subset of T-cells producing the cytokines interleukin-2 (IL-2) and interferon-gamma.
453 8168635 These studies also suggest that the diabetes-protective effects of administering microbial agents, adjuvants, and a beta-cell autoantigen (GAD65 [glutamic acid decarboxylase]) may result from activation of a Th2 subset of T-cells that produce the cytokines IL-4 and IL-10 and consequently downregulate the Th1-cell-mediated autoimmune response.
454 8232539 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease characterized by lymphocytic infiltration of the islets of Langerhans (insulitis) and destruction of insulin-secreting pancreatic beta-cells.
455 8232539 Furthermore, NOD mice receiving intrathymic injections of GAD65 exhibit markedly reduced T-cell proliferative responses to GAD and to the rest of the panel, in addition to remaining free of diabetes.
456 8240659 The 64,000-M(r) (64K) islet autoantigen, which is considered to be a target protein of beta cell destruction in insulin-dependent diabetes mellitus (IDDM), has recently been identified as the enzyme glutamic acid decarboxylase (GAD).
457 8240659 Both GADs are also present in the infected mice brain at 72 h p.i.; however, their islets contain about three-fold more GAD65, and essentially no detectable GAD67.
458 8245784 It is a major target of autoimmunity in Stiff-Man syndrome (SMS), a rare neurological disease, and in insulin-dependent diabetes mellitus.
459 8245784 The two GAD isoforms, GAD-65 and GAD-67, are the products of two different genes.
460 8245784 This reactivity is similar to that displayed by the monoclonal antibody GAD 6, suggesting the presence of a single immunodominant epitope (SMS-E1) in this region of GAD-65.
461 8245784 In addition, most SMS sera recognized at least one epitope (SMS-E2) in the NH2-terminal domain of GAD-65 (amino acids 1-95).
462 8245784 The demonstration in SMS patients of a strikingly homogeneous humoral autoimmune response against GAD and the identification of dominant autoreactive target regions may help to elucidate the molecular mechanisms of GAD processing and presentation involved in GAD autoimmunity.
463 8245784 Moreover, the reactivity reported here of GAD autoantibodies in SMS partially differs from the reactivity of GAD autoantibodies in insulin-dependent diabetes mellitus, suggesting a link between the pattern of humoral autoimmunity and the clinical condition.
464 8245784 It is a major target of autoimmunity in Stiff-Man syndrome (SMS), a rare neurological disease, and in insulin-dependent diabetes mellitus.
465 8245784 The two GAD isoforms, GAD-65 and GAD-67, are the products of two different genes.
466 8245784 This reactivity is similar to that displayed by the monoclonal antibody GAD 6, suggesting the presence of a single immunodominant epitope (SMS-E1) in this region of GAD-65.
467 8245784 In addition, most SMS sera recognized at least one epitope (SMS-E2) in the NH2-terminal domain of GAD-65 (amino acids 1-95).
468 8245784 The demonstration in SMS patients of a strikingly homogeneous humoral autoimmune response against GAD and the identification of dominant autoreactive target regions may help to elucidate the molecular mechanisms of GAD processing and presentation involved in GAD autoimmunity.
469 8245784 Moreover, the reactivity reported here of GAD autoantibodies in SMS partially differs from the reactivity of GAD autoantibodies in insulin-dependent diabetes mellitus, suggesting a link between the pattern of humoral autoimmunity and the clinical condition.
470 8245784 It is a major target of autoimmunity in Stiff-Man syndrome (SMS), a rare neurological disease, and in insulin-dependent diabetes mellitus.
471 8245784 The two GAD isoforms, GAD-65 and GAD-67, are the products of two different genes.
472 8245784 This reactivity is similar to that displayed by the monoclonal antibody GAD 6, suggesting the presence of a single immunodominant epitope (SMS-E1) in this region of GAD-65.
473 8245784 In addition, most SMS sera recognized at least one epitope (SMS-E2) in the NH2-terminal domain of GAD-65 (amino acids 1-95).
474 8245784 The demonstration in SMS patients of a strikingly homogeneous humoral autoimmune response against GAD and the identification of dominant autoreactive target regions may help to elucidate the molecular mechanisms of GAD processing and presentation involved in GAD autoimmunity.
475 8245784 Moreover, the reactivity reported here of GAD autoantibodies in SMS partially differs from the reactivity of GAD autoantibodies in insulin-dependent diabetes mellitus, suggesting a link between the pattern of humoral autoimmunity and the clinical condition.
476 8314014 Insulin, carboxypeptidase-H (CP-H), and glutamate decarboxylase (GAD) have been identified as potential autoantigens in insulin-dependent diabetes mellitus (IDDM).
477 8314014 In contrast, islet cells failed to reveal cell-surface staining for GAD65, another putative autoantigen in IDDM, under either basal or insulin stimulatory conditions or following exposure of islet cells to the cytokines interleukin-1 beta, tumor necrosis factor-alpha, and recombinant human interferon-gamma.
478 8314020 Autoantibodies to glutamic acid decarboxylase (GAD) are frequent at or before the onset of insulin-dependent diabetes mellitus (IDDM).
479 8314020 By using this assay, 77% (77 of 100) of serum samples from recent-onset IDDM patients were positive for GAD65 antibodies compared with 4% (4 of 100) of serum samples from healthy control subjects.
480 8314020 In competition analysis with unlabeled purified recombinant human islet GAD65, binding to tracer was inhibited in 74% (74 of 100) of the GAD65-positive IDDM serum samples compared with 2% of the control samples.
481 8314020 The frequency of GAD antibodies was significantly higher with IDDM onset before the age of 30 (80%, 59 of 74) than after the age of 30 (48%, 10 of 21) (P < 0.01).
482 8314020 In conclusion, even large numbers of serum samples can now be tested for GAD65 antibodies in a relatively short time, allowing screening of individuals without a family history of IDDM for the presence of this marker.
483 8314020 Autoantibodies to glutamic acid decarboxylase (GAD) are frequent at or before the onset of insulin-dependent diabetes mellitus (IDDM).
484 8314020 By using this assay, 77% (77 of 100) of serum samples from recent-onset IDDM patients were positive for GAD65 antibodies compared with 4% (4 of 100) of serum samples from healthy control subjects.
485 8314020 In competition analysis with unlabeled purified recombinant human islet GAD65, binding to tracer was inhibited in 74% (74 of 100) of the GAD65-positive IDDM serum samples compared with 2% of the control samples.
486 8314020 The frequency of GAD antibodies was significantly higher with IDDM onset before the age of 30 (80%, 59 of 74) than after the age of 30 (48%, 10 of 21) (P < 0.01).
487 8314020 In conclusion, even large numbers of serum samples can now be tested for GAD65 antibodies in a relatively short time, allowing screening of individuals without a family history of IDDM for the presence of this marker.
488 8314020 Autoantibodies to glutamic acid decarboxylase (GAD) are frequent at or before the onset of insulin-dependent diabetes mellitus (IDDM).
489 8314020 By using this assay, 77% (77 of 100) of serum samples from recent-onset IDDM patients were positive for GAD65 antibodies compared with 4% (4 of 100) of serum samples from healthy control subjects.
490 8314020 In competition analysis with unlabeled purified recombinant human islet GAD65, binding to tracer was inhibited in 74% (74 of 100) of the GAD65-positive IDDM serum samples compared with 2% of the control samples.
491 8314020 The frequency of GAD antibodies was significantly higher with IDDM onset before the age of 30 (80%, 59 of 74) than after the age of 30 (48%, 10 of 21) (P < 0.01).
492 8314020 In conclusion, even large numbers of serum samples can now be tested for GAD65 antibodies in a relatively short time, allowing screening of individuals without a family history of IDDM for the presence of this marker.
493 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
494 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
495 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
496 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
497 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
498 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
499 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
500 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
501 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
502 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
503 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
504 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
505 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
506 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
507 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
508 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
509 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
510 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
511 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
512 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
513 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
514 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
515 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
516 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
517 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
518 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
519 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
520 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
521 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
522 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
523 8376591 We investigated the presence of autoantibodies to baculovirus-expressed human recombinant 65- and 67-kD isoforms of glutamate decarboxylase (GAD65 and GAD67) in insulin-dependent diabetes mellitus (IDDM).
524 8376591 In the immunoprecipitation test using [35S]methionine-labeled GADs antibodies to GAD65 were detected in 13/15 (87%) islet cell antibody (ICA)-positive and in 1/35 (2.9%) ICA-negative first-degree relatives of patients with IDDM, in 6/11 (54.5%) ICA-positive nondiabetic schoolchildren, and in 35/50 (70%) patients with newly diagnosed IDDM.
525 8376591 After onset of IDDM antibodies to GAD65 and GAD67 declined but were still positive in 25 and 9.4% of subjects with long-standing IDDM (> 10 yr).
526 8376591 An immunotrapping enzyme activity assay for GAD65 antibodies was positive in 64/75 (85.3%) of sera that were GAD antibody positive in the immunoprecipitation test (r = 0.870, P < 0.0001).
527 8376591 In two (2.7%) sera GAD65 antibodies that block GAD enzyme activity were found.
528 8376591 Our data suggest that antibodies to GAD65 but not to GAD67 represent sensitive markers for preclinical and overt IDDM.
529 8405707 This was achieved 1) by preabsorption of ICA+ sera with recombinant GAD65 and/or GAD67 expressed in a baculovirus system and 2) by ICA analysis of sera on mouse pancreas, as GAD antibodies do not stain mouse islets in the immunofluorescence test.
530 8423232 At and before onset, most insulin-dependent diabetics (IDDM) have islet GAD65 autoantibodies (GAD65Ab).
531 8423232 Since IDDM also occurs in older patients where non-insulin-dependent diabetes is common, we studied GAD65Ab at onset to classify diabetes type.
532 8464926 GAD-65 is a dominant autoantigen in stiff-man syndrome and insulin-dependent diabetes mellitus.
533 8486775 Sera from 38 patients with type 1 (insulin-dependent) diabetes mellitus, which precipitated a 64-kD antigen from rat islets, reacted with recombinant GAD-65 in relation to their anti-64-kD titers.
534 8486775 Subsequently, [35S]methionine-labeled GAD-65 was purified from COS cell lysates and employed in a binding assay with 50 sera of patients with recent onset of type 1 diabetes mellitus. 38 sera (76%) precipitated labeled GAD-65 with titers that correlated with islet cell antibodies (ICA), determined in a standard immunofluorescence assay. 2 sera were GAD positive but ICA negative, 4 were positive only for ICA, and 6 were negative for both GAD and ICA, as were the sera of 20 controls.
535 8486775 Sera from 38 patients with type 1 (insulin-dependent) diabetes mellitus, which precipitated a 64-kD antigen from rat islets, reacted with recombinant GAD-65 in relation to their anti-64-kD titers.
536 8486775 Subsequently, [35S]methionine-labeled GAD-65 was purified from COS cell lysates and employed in a binding assay with 50 sera of patients with recent onset of type 1 diabetes mellitus. 38 sera (76%) precipitated labeled GAD-65 with titers that correlated with islet cell antibodies (ICA), determined in a standard immunofluorescence assay. 2 sera were GAD positive but ICA negative, 4 were positive only for ICA, and 6 were negative for both GAD and ICA, as were the sera of 20 controls.
537 8504767 We, therefore, tested hypotheses that M. nemestrina islets also have restricted GAD expression, that GAD expression in primates is stimulated by glucose, and that this stimulation remains restricted to the 64,000 mol wt (GAD65) isoform.
538 8507202 Glutamic acid decarboxylase (GAD) is a pancreatic islet autoantigen in insulin-dependent diabetes (IDD).
539 8507202 Two forms of GAD, GAD65 and GAD67, have been identified in brain but human islets have been reported to express only GAD65.
540 8507202 The presence of GAD67 in human pancreas implies that this form of GAD, as well as GAD65, has a pathogenic role in IDD.
541 8507202 Glutamic acid decarboxylase (GAD) is a pancreatic islet autoantigen in insulin-dependent diabetes (IDD).
542 8507202 Two forms of GAD, GAD65 and GAD67, have been identified in brain but human islets have been reported to express only GAD65.
543 8507202 The presence of GAD67 in human pancreas implies that this form of GAD, as well as GAD65, has a pathogenic role in IDD.
544 8552991 In vitro stimulation with glutamic acid decarboxylase (GAD65) leads to an oligoclonal response of peripheral T-cells in an IDDM patient.
545 8552991 The enzyme glutamic acid decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
546 8552991 To study T-cell reactivity towards GAD, peripheral blood leucocytes from seven patients with IDDM and five control subjects were stimulated in vitro with recombinant GAD.
547 8552991 The author's data suggest that GAD-reactive T-cells of Th1 phenotype can be obtained after in vitro stimulation of peripheral blood leucocytes from an HLA-DRB1*03/*04 heterozygous IDDM patient.
548 8552991 In vitro stimulation with glutamic acid decarboxylase (GAD65) leads to an oligoclonal response of peripheral T-cells in an IDDM patient.
549 8552991 The enzyme glutamic acid decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
550 8552991 To study T-cell reactivity towards GAD, peripheral blood leucocytes from seven patients with IDDM and five control subjects were stimulated in vitro with recombinant GAD.
551 8552991 The author's data suggest that GAD-reactive T-cells of Th1 phenotype can be obtained after in vitro stimulation of peripheral blood leucocytes from an HLA-DRB1*03/*04 heterozygous IDDM patient.
552 8566695 Auto-antibodies to GAD65 have been associated with the onset of insulin-dependent diabetes mellitus.
553 8595722 DELISA: sensitive nonisotopic assay for GAD65 autoantibodies, a key risk-assessment marker for insulin-dependent diabetes mellitus.
554 8603772 One of the major beta-cell autoantigens associated with IDDM is GAD.
555 8603772 We therefore analyzed patterns of GAD gene transcription by quantitating the mRNAs encoding both the 65- and 67-kDa isoforms (GAD65 and GAD67, respectively) in human fetal, postnatal, and adult pancreases, as well as in isolated adult islets, and examined their tissue-specific expression.
556 8603772 In the fetal pancreas, strong immunoreactivity for GAD65 was also evident in epithelial cells, which lacked expression of insulin or glucagon, some of which were present in the ductal epithelium, suggesting that GAD65 expression might correlate with endocrine determination.
557 8603772 One of the major beta-cell autoantigens associated with IDDM is GAD.
558 8603772 We therefore analyzed patterns of GAD gene transcription by quantitating the mRNAs encoding both the 65- and 67-kDa isoforms (GAD65 and GAD67, respectively) in human fetal, postnatal, and adult pancreases, as well as in isolated adult islets, and examined their tissue-specific expression.
559 8603772 In the fetal pancreas, strong immunoreactivity for GAD65 was also evident in epithelial cells, which lacked expression of insulin or glucagon, some of which were present in the ductal epithelium, suggesting that GAD65 expression might correlate with endocrine determination.
560 8635655 We analyzed peripheral blood mononuclear cell (PBMC) responses to human insulin, glutamate decarboxylase GAD65, tyrosine phosphatase ICA512, glucagon, membrane preparations of RIN cells and human pancreas, and three control antigens (La = nuclear cell antigen, tetanus toxoid, and phytohemagglutinin).
561 8635655 The highest differences in the magnitude of proliferative responses were seen for ICA512, followed by membrane preparations of RIN cells, GAD65, and human pancreas.
562 8635655 We analyzed peripheral blood mononuclear cell (PBMC) responses to human insulin, glutamate decarboxylase GAD65, tyrosine phosphatase ICA512, glucagon, membrane preparations of RIN cells and human pancreas, and three control antigens (La = nuclear cell antigen, tetanus toxoid, and phytohemagglutinin).
563 8635655 The highest differences in the magnitude of proliferative responses were seen for ICA512, followed by membrane preparations of RIN cells, GAD65, and human pancreas.
564 8636356 To evaluate the association of autoimmunity to glutamic acid decarboxylase (GAD) with insulin-dependent diabetes mellitus (IDDM) and IDDM-associated human leukocyte antigen (HLA) types, we studied a unique group of 47 patients with autoimmune polyendocrine syndrome type 1, a recessive disease not associated with HLA.
565 8636356 GAD65 antibodies (GAD65-Ab), GAD67-Ab, islet cell antibodies, and HLA-DQA1, -DQB1, and -DRB1 were analyzed in relation to IDDM or a decreased insulin secretory capacity.
566 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
567 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
568 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
569 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
570 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
571 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
572 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
573 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
574 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
575 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
576 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
577 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
578 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
579 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
580 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
581 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
582 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
583 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
584 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
585 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
586 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
587 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
588 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
589 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
590 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
591 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
592 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
593 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
594 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
595 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
596 8666914 Nasal administration of glutamate decarboxylase (GAD65) peptides induces Th2 responses and prevents murine insulin-dependent diabetes.
597 8666914 Induction of passive tolerance to GAD65, through inactivation of reactive T cells before the onset of autoimmunity, prevented determinant spreading and the development of insulin-dependent diabetes mellitus (IDDM).
598 8666914 Here, we examined whether an alternative strategy, designed to induce active tolerance via the engagement of Th2 immune responses to GAD65, before the spontaneous onset of autoimmunity, could inhibit the cascade of Th1 responses that lead to IDDM.
599 8666914 GAD65 peptide treated mice displayed greatly reduced IFN gamma responses and increased IL-5 responses to GAD65, confirming the diversion of the spontaneous GAD65 Th1 response toward a Th2 phenotype.
600 8666914 Consistent with the induction of an active tolerance mechanism, splenic CD4+ (but not CD8+) T cells from GAD65 peptide-treated mice, inhibited the adoptive transfer of IDDM to NOD-scid/scid mice.
601 8666914 Finally, GAD65 peptide treatment reduced insulitis and long-term IDDM incidence.
602 8675688 Identification and characterization of glima 38, a glycosylated islet cell membrane antigen, which together with GAD65 and IA2 marks the early phases of autoimmune response in type 1 diabetes.
603 8675688 Immunoprecipitating IgG autoantibodies to glutamic acid decarboxylase, GAD65, and/or a tyrosine phosphatase, IA2, are present in the majority of individuals experiencing pancreatic beta cell destruction and development of type 1 diabetes.
604 8675688 The 38-kD autoantigen, named glima 38, is an amphiphilic membrane glycoprotein, specifically expressed in islet and neuronal cell lines, and thus shares the neuroendocrine expression patterns of GAD65 and IA2.
605 8675688 The cumulative incidence of GAD65 and glima 38 antibodies in these two groups was 83 and 80%, respectively, and the cumulative incidence of GAD65, glima 38, and IA2 antibodies in the same groups was 91 and 84%, respectively.
606 8675688 GAD65, IA2, and glima 38 represent three distinct targets of immunoprecipitating IgG autoantibodies associated with beta cell destruction and type 1 diabetes.
607 8675688 Identification and characterization of glima 38, a glycosylated islet cell membrane antigen, which together with GAD65 and IA2 marks the early phases of autoimmune response in type 1 diabetes.
608 8675688 Immunoprecipitating IgG autoantibodies to glutamic acid decarboxylase, GAD65, and/or a tyrosine phosphatase, IA2, are present in the majority of individuals experiencing pancreatic beta cell destruction and development of type 1 diabetes.
609 8675688 The 38-kD autoantigen, named glima 38, is an amphiphilic membrane glycoprotein, specifically expressed in islet and neuronal cell lines, and thus shares the neuroendocrine expression patterns of GAD65 and IA2.
610 8675688 The cumulative incidence of GAD65 and glima 38 antibodies in these two groups was 83 and 80%, respectively, and the cumulative incidence of GAD65, glima 38, and IA2 antibodies in the same groups was 91 and 84%, respectively.
611 8675688 GAD65, IA2, and glima 38 represent three distinct targets of immunoprecipitating IgG autoantibodies associated with beta cell destruction and type 1 diabetes.
612 8675688 Identification and characterization of glima 38, a glycosylated islet cell membrane antigen, which together with GAD65 and IA2 marks the early phases of autoimmune response in type 1 diabetes.
613 8675688 Immunoprecipitating IgG autoantibodies to glutamic acid decarboxylase, GAD65, and/or a tyrosine phosphatase, IA2, are present in the majority of individuals experiencing pancreatic beta cell destruction and development of type 1 diabetes.
614 8675688 The 38-kD autoantigen, named glima 38, is an amphiphilic membrane glycoprotein, specifically expressed in islet and neuronal cell lines, and thus shares the neuroendocrine expression patterns of GAD65 and IA2.
615 8675688 The cumulative incidence of GAD65 and glima 38 antibodies in these two groups was 83 and 80%, respectively, and the cumulative incidence of GAD65, glima 38, and IA2 antibodies in the same groups was 91 and 84%, respectively.
616 8675688 GAD65, IA2, and glima 38 represent three distinct targets of immunoprecipitating IgG autoantibodies associated with beta cell destruction and type 1 diabetes.
617 8675688 Identification and characterization of glima 38, a glycosylated islet cell membrane antigen, which together with GAD65 and IA2 marks the early phases of autoimmune response in type 1 diabetes.
618 8675688 Immunoprecipitating IgG autoantibodies to glutamic acid decarboxylase, GAD65, and/or a tyrosine phosphatase, IA2, are present in the majority of individuals experiencing pancreatic beta cell destruction and development of type 1 diabetes.
619 8675688 The 38-kD autoantigen, named glima 38, is an amphiphilic membrane glycoprotein, specifically expressed in islet and neuronal cell lines, and thus shares the neuroendocrine expression patterns of GAD65 and IA2.
620 8675688 The cumulative incidence of GAD65 and glima 38 antibodies in these two groups was 83 and 80%, respectively, and the cumulative incidence of GAD65, glima 38, and IA2 antibodies in the same groups was 91 and 84%, respectively.
621 8675688 GAD65, IA2, and glima 38 represent three distinct targets of immunoprecipitating IgG autoantibodies associated with beta cell destruction and type 1 diabetes.
622 8675688 Identification and characterization of glima 38, a glycosylated islet cell membrane antigen, which together with GAD65 and IA2 marks the early phases of autoimmune response in type 1 diabetes.
623 8675688 Immunoprecipitating IgG autoantibodies to glutamic acid decarboxylase, GAD65, and/or a tyrosine phosphatase, IA2, are present in the majority of individuals experiencing pancreatic beta cell destruction and development of type 1 diabetes.
624 8675688 The 38-kD autoantigen, named glima 38, is an amphiphilic membrane glycoprotein, specifically expressed in islet and neuronal cell lines, and thus shares the neuroendocrine expression patterns of GAD65 and IA2.
625 8675688 The cumulative incidence of GAD65 and glima 38 antibodies in these two groups was 83 and 80%, respectively, and the cumulative incidence of GAD65, glima 38, and IA2 antibodies in the same groups was 91 and 84%, respectively.
626 8675688 GAD65, IA2, and glima 38 represent three distinct targets of immunoprecipitating IgG autoantibodies associated with beta cell destruction and type 1 diabetes.
627 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
628 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
629 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
630 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
631 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
632 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
633 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
634 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
635 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
636 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
637 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
638 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
639 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
640 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
641 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
642 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
643 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
644 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
645 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
646 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
647 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
648 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
649 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
650 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
651 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
652 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
653 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
654 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
655 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
656 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
657 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
658 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
659 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
660 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
661 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
662 8679901 Linkage and association studies in insulin-dependent diabetes with a new dinucleotide repeat polymorphism at the GAD65 locus.
663 8679901 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM).
664 8679901 The islet cell specific, 65 kDa form of GAD (GAD65) is encoded by a gene on chromosome 10p.
665 8679901 To determine whether variation in the GAD65 gene plays a role in genetic susceptibility to IDDM, possibly explaining the reported evidence for linkage on 10p, we isolated cosmid clones containing GAD65, and identified a highly polymorphic dinucleotide repeat physically linked to the gene.
666 8679901 This GAD65 microsatellite marker, along with the other 10p markers D10S193 and D10S211, were used to genotype the members of 186 multiplex IDDM families with 2 or more affected siblings.
667 8679901 The family data for GAD65 were further assessed for allelic association with IDDM using the transmission/disequilibrium test.
668 8679901 No significant deviations from expected values were observed in any of these tests, suggesting that variation in the GAD65 gene does not play a significant role in genetic susceptibility to IDDM.
669 8689840 Insulin-dependent diabetes mellitus (IDDM) is linked to HLA factors on human chromosome 6 and strongly associated with the presence of autoantibodies against the glutamic acid decarboxylase isoform GAD65.
670 8689840 At the same time, the molecular cloning of human islet GAD65 and the development of precise and reproducible GAD65Ab assays with recombinant human GAD65 has given new insights to the problem of to what extent HLA control the development of a GAD65 immune response or to the development of IDDM.
671 8689840 This is important since other factors may control the development of IDDM in only a fraction of GAD65 antibody positive individuals detected following a screening of the general population.
672 8689840 Insulin-dependent diabetes mellitus (IDDM) is linked to HLA factors on human chromosome 6 and strongly associated with the presence of autoantibodies against the glutamic acid decarboxylase isoform GAD65.
673 8689840 At the same time, the molecular cloning of human islet GAD65 and the development of precise and reproducible GAD65Ab assays with recombinant human GAD65 has given new insights to the problem of to what extent HLA control the development of a GAD65 immune response or to the development of IDDM.
674 8689840 This is important since other factors may control the development of IDDM in only a fraction of GAD65 antibody positive individuals detected following a screening of the general population.
675 8689840 Insulin-dependent diabetes mellitus (IDDM) is linked to HLA factors on human chromosome 6 and strongly associated with the presence of autoantibodies against the glutamic acid decarboxylase isoform GAD65.
676 8689840 At the same time, the molecular cloning of human islet GAD65 and the development of precise and reproducible GAD65Ab assays with recombinant human GAD65 has given new insights to the problem of to what extent HLA control the development of a GAD65 immune response or to the development of IDDM.
677 8689840 This is important since other factors may control the development of IDDM in only a fraction of GAD65 antibody positive individuals detected following a screening of the general population.
678 8692821 IA-2, a transmembrane protein of the protein tyrosine phosphatase family, is a major autoantigen in insulin-dependent diabetes mellitus.
679 8692821 Coded sera (100) were tested: 50 from patients with newly diagnosed insulin-dependent diabetes mellitus (IDDM) and 50 from age-matched normal controls.
680 8692821 Up to 86% of the IDDM patients had autoantibodies to IA-2 and/or GAD65.
681 8692821 Absorption experiments showed that the immunofluorescence reactivity of ICA-positive sera was greatly reduced by prior incubation with recombinant IA-2 or GAD65 when the respective antibody was present.
682 8692821 A little over one-half (9 of 16) of the IDDM sera that were negative for ICA were found to be positive for autoantibodies to IA-2 and/or GAD65, arguing that the immunofluorescence test for ICA is less sensitive than the recombinant tests for autoantibodies to IA-2 and GAD65.
683 8692821 It is concluded that IA-2 is a major islet cell autoantigen in IDDM, and, together with GAD65, is responsible for much of the reactivity of ICA with pancreatic islets.
684 8692821 Tests for the detection of autoantibodies to recombinant IA-2 and GAD65 may eventually replace ICA immunofluorescence for IDDM population screening.
685 8692821 IA-2, a transmembrane protein of the protein tyrosine phosphatase family, is a major autoantigen in insulin-dependent diabetes mellitus.
686 8692821 Coded sera (100) were tested: 50 from patients with newly diagnosed insulin-dependent diabetes mellitus (IDDM) and 50 from age-matched normal controls.
687 8692821 Up to 86% of the IDDM patients had autoantibodies to IA-2 and/or GAD65.
688 8692821 Absorption experiments showed that the immunofluorescence reactivity of ICA-positive sera was greatly reduced by prior incubation with recombinant IA-2 or GAD65 when the respective antibody was present.
689 8692821 A little over one-half (9 of 16) of the IDDM sera that were negative for ICA were found to be positive for autoantibodies to IA-2 and/or GAD65, arguing that the immunofluorescence test for ICA is less sensitive than the recombinant tests for autoantibodies to IA-2 and GAD65.
690 8692821 It is concluded that IA-2 is a major islet cell autoantigen in IDDM, and, together with GAD65, is responsible for much of the reactivity of ICA with pancreatic islets.
691 8692821 Tests for the detection of autoantibodies to recombinant IA-2 and GAD65 may eventually replace ICA immunofluorescence for IDDM population screening.
692 8692821 IA-2, a transmembrane protein of the protein tyrosine phosphatase family, is a major autoantigen in insulin-dependent diabetes mellitus.
693 8692821 Coded sera (100) were tested: 50 from patients with newly diagnosed insulin-dependent diabetes mellitus (IDDM) and 50 from age-matched normal controls.
694 8692821 Up to 86% of the IDDM patients had autoantibodies to IA-2 and/or GAD65.
695 8692821 Absorption experiments showed that the immunofluorescence reactivity of ICA-positive sera was greatly reduced by prior incubation with recombinant IA-2 or GAD65 when the respective antibody was present.
696 8692821 A little over one-half (9 of 16) of the IDDM sera that were negative for ICA were found to be positive for autoantibodies to IA-2 and/or GAD65, arguing that the immunofluorescence test for ICA is less sensitive than the recombinant tests for autoantibodies to IA-2 and GAD65.
697 8692821 It is concluded that IA-2 is a major islet cell autoantigen in IDDM, and, together with GAD65, is responsible for much of the reactivity of ICA with pancreatic islets.
698 8692821 Tests for the detection of autoantibodies to recombinant IA-2 and GAD65 may eventually replace ICA immunofluorescence for IDDM population screening.
699 8692821 IA-2, a transmembrane protein of the protein tyrosine phosphatase family, is a major autoantigen in insulin-dependent diabetes mellitus.
700 8692821 Coded sera (100) were tested: 50 from patients with newly diagnosed insulin-dependent diabetes mellitus (IDDM) and 50 from age-matched normal controls.
701 8692821 Up to 86% of the IDDM patients had autoantibodies to IA-2 and/or GAD65.
702 8692821 Absorption experiments showed that the immunofluorescence reactivity of ICA-positive sera was greatly reduced by prior incubation with recombinant IA-2 or GAD65 when the respective antibody was present.
703 8692821 A little over one-half (9 of 16) of the IDDM sera that were negative for ICA were found to be positive for autoantibodies to IA-2 and/or GAD65, arguing that the immunofluorescence test for ICA is less sensitive than the recombinant tests for autoantibodies to IA-2 and GAD65.
704 8692821 It is concluded that IA-2 is a major islet cell autoantigen in IDDM, and, together with GAD65, is responsible for much of the reactivity of ICA with pancreatic islets.
705 8692821 Tests for the detection of autoantibodies to recombinant IA-2 and GAD65 may eventually replace ICA immunofluorescence for IDDM population screening.
706 8692821 IA-2, a transmembrane protein of the protein tyrosine phosphatase family, is a major autoantigen in insulin-dependent diabetes mellitus.
707 8692821 Coded sera (100) were tested: 50 from patients with newly diagnosed insulin-dependent diabetes mellitus (IDDM) and 50 from age-matched normal controls.
708 8692821 Up to 86% of the IDDM patients had autoantibodies to IA-2 and/or GAD65.
709 8692821 Absorption experiments showed that the immunofluorescence reactivity of ICA-positive sera was greatly reduced by prior incubation with recombinant IA-2 or GAD65 when the respective antibody was present.
710 8692821 A little over one-half (9 of 16) of the IDDM sera that were negative for ICA were found to be positive for autoantibodies to IA-2 and/or GAD65, arguing that the immunofluorescence test for ICA is less sensitive than the recombinant tests for autoantibodies to IA-2 and GAD65.
711 8692821 It is concluded that IA-2 is a major islet cell autoantigen in IDDM, and, together with GAD65, is responsible for much of the reactivity of ICA with pancreatic islets.
712 8692821 Tests for the detection of autoantibodies to recombinant IA-2 and GAD65 may eventually replace ICA immunofluorescence for IDDM population screening.
713 8706342 Glutamic acid decarboxylase (GAD) could be a key antigen involved in this disease, and GAD65 peptide 524-543 has been implicated in early T cell response in young NOD mice.
714 8706342 After peptide challenge of splenocytes in vitro, protection against CY-accelerated diabetes was associated with higher peptide-specific production of T helper type 2 (Th2)-associated interleukins 4 and 10, whereas Th1-associated interferon-gamma and IL-2 were proportionally less represented.
715 8706342 It is concluded that immunization of NOD mice with GAD65 peptide 524-543 can counteract CY-accelerated diabetes, possibly through active cellular suppression linked to a shift of Th1/Th2 balance toward the production of Th2 cytokines such as IL-4 and IL-10.
716 8706342 Glutamic acid decarboxylase (GAD) could be a key antigen involved in this disease, and GAD65 peptide 524-543 has been implicated in early T cell response in young NOD mice.
717 8706342 After peptide challenge of splenocytes in vitro, protection against CY-accelerated diabetes was associated with higher peptide-specific production of T helper type 2 (Th2)-associated interleukins 4 and 10, whereas Th1-associated interferon-gamma and IL-2 were proportionally less represented.
718 8706342 It is concluded that immunization of NOD mice with GAD65 peptide 524-543 can counteract CY-accelerated diabetes, possibly through active cellular suppression linked to a shift of Th1/Th2 balance toward the production of Th2 cytokines such as IL-4 and IL-10.
719 8730438 Antibodies to glutamic acid decarboxylase (GAD), a pancreatic islet beta-cell antigen, are present in > 80% of newly diagnosed insulin-dependent diabetes mellitus (IDDM), and are found in nonobese diabetic (NOD) mice, a murine model of spontaneous IDDM.
720 8730438 To determine whether GAD is a target antigen in the kidney damage of NOD mice, we studied GAD mRNAs (GAD65 and GAD67) by RT-PCR in mesangial cells, isolated glomeruli, and kidney cortex and medulla in NOD and SJL/C57BL mice.
721 8734572 Based on studies in spontaneously non-obese diabetic (NOD) mice, it has been suggested that the Mr 65,000 isoform of glutamic acid decarboxylase (GAD65) is of major importance in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
722 8734572 In humans, antibodies to GAD65 are present before and at onset of the disease and in vitro T cell reactivity to GAD has also been reported.
723 8734572 To further characterize the T cell recognition of GAD65, we incubated peripheral blood mononuclear cells from 45 newly diagnosed IDDM patients with purified recombinant human islet GAD65 and correlated the proliferative response with HLA DR haplotype and the presence of GAD65 autoantibodies.
724 8734572 In conclusion, we find a proliferative T cell response to GAD65 in approximately 50% of recent onset IDDM patients and unexpectedly find the majority of responders to be HLA non-DR 3/4 heterozygous patients.
725 8734572 Based on studies in spontaneously non-obese diabetic (NOD) mice, it has been suggested that the Mr 65,000 isoform of glutamic acid decarboxylase (GAD65) is of major importance in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
726 8734572 In humans, antibodies to GAD65 are present before and at onset of the disease and in vitro T cell reactivity to GAD has also been reported.
727 8734572 To further characterize the T cell recognition of GAD65, we incubated peripheral blood mononuclear cells from 45 newly diagnosed IDDM patients with purified recombinant human islet GAD65 and correlated the proliferative response with HLA DR haplotype and the presence of GAD65 autoantibodies.
728 8734572 In conclusion, we find a proliferative T cell response to GAD65 in approximately 50% of recent onset IDDM patients and unexpectedly find the majority of responders to be HLA non-DR 3/4 heterozygous patients.
729 8734572 Based on studies in spontaneously non-obese diabetic (NOD) mice, it has been suggested that the Mr 65,000 isoform of glutamic acid decarboxylase (GAD65) is of major importance in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
730 8734572 In humans, antibodies to GAD65 are present before and at onset of the disease and in vitro T cell reactivity to GAD has also been reported.
731 8734572 To further characterize the T cell recognition of GAD65, we incubated peripheral blood mononuclear cells from 45 newly diagnosed IDDM patients with purified recombinant human islet GAD65 and correlated the proliferative response with HLA DR haplotype and the presence of GAD65 autoantibodies.
732 8734572 In conclusion, we find a proliferative T cell response to GAD65 in approximately 50% of recent onset IDDM patients and unexpectedly find the majority of responders to be HLA non-DR 3/4 heterozygous patients.
733 8734572 Based on studies in spontaneously non-obese diabetic (NOD) mice, it has been suggested that the Mr 65,000 isoform of glutamic acid decarboxylase (GAD65) is of major importance in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
734 8734572 In humans, antibodies to GAD65 are present before and at onset of the disease and in vitro T cell reactivity to GAD has also been reported.
735 8734572 To further characterize the T cell recognition of GAD65, we incubated peripheral blood mononuclear cells from 45 newly diagnosed IDDM patients with purified recombinant human islet GAD65 and correlated the proliferative response with HLA DR haplotype and the presence of GAD65 autoantibodies.
736 8734572 In conclusion, we find a proliferative T cell response to GAD65 in approximately 50% of recent onset IDDM patients and unexpectedly find the majority of responders to be HLA non-DR 3/4 heterozygous patients.
737 8739307 An ELISA displacement test using two biotinylated monoclonals recognizing a linear (M61/7E11) or a conformational GAD65 epitope (M65/6B12) was performed to identify epitope regions recognized by monoclonal GAD antibodies.
738 8739307 The GAD binding by monoclonal GAD antibodies was tested by immunofluorescence on fixed and unfixed pancreatic sections of human, rat, and mouse, and by Dot-blot experiments. 16/23 (69.6%) of the monoclonals were specifically reactive with GAD65 and 7/23 (30.4%) were reactive with both GAD isoforms. 8/16 (50%) of monoclonal GAD65 antibodies recognized a linear GAD epitope located at the N-terminus (pattern 1). 5/16 (31.3%) displaced M65/6B12, indicating the recognition of a conformational GAD epitope (pattern 2).
739 8739307 In conclusion, GAD antibodies recognizing both conformational and linear epitopes of the GAD65 molecule are involved in ICA binding with strong reactivity.
740 8739307 An ELISA displacement test using two biotinylated monoclonals recognizing a linear (M61/7E11) or a conformational GAD65 epitope (M65/6B12) was performed to identify epitope regions recognized by monoclonal GAD antibodies.
741 8739307 The GAD binding by monoclonal GAD antibodies was tested by immunofluorescence on fixed and unfixed pancreatic sections of human, rat, and mouse, and by Dot-blot experiments. 16/23 (69.6%) of the monoclonals were specifically reactive with GAD65 and 7/23 (30.4%) were reactive with both GAD isoforms. 8/16 (50%) of monoclonal GAD65 antibodies recognized a linear GAD epitope located at the N-terminus (pattern 1). 5/16 (31.3%) displaced M65/6B12, indicating the recognition of a conformational GAD epitope (pattern 2).
742 8739307 In conclusion, GAD antibodies recognizing both conformational and linear epitopes of the GAD65 molecule are involved in ICA binding with strong reactivity.
743 8739307 An ELISA displacement test using two biotinylated monoclonals recognizing a linear (M61/7E11) or a conformational GAD65 epitope (M65/6B12) was performed to identify epitope regions recognized by monoclonal GAD antibodies.
744 8739307 The GAD binding by monoclonal GAD antibodies was tested by immunofluorescence on fixed and unfixed pancreatic sections of human, rat, and mouse, and by Dot-blot experiments. 16/23 (69.6%) of the monoclonals were specifically reactive with GAD65 and 7/23 (30.4%) were reactive with both GAD isoforms. 8/16 (50%) of monoclonal GAD65 antibodies recognized a linear GAD epitope located at the N-terminus (pattern 1). 5/16 (31.3%) displaced M65/6B12, indicating the recognition of a conformational GAD epitope (pattern 2).
745 8739307 In conclusion, GAD antibodies recognizing both conformational and linear epitopes of the GAD65 molecule are involved in ICA binding with strong reactivity.
746 8743289 Glutamate decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes (IDDM) and the neurological disorder Stiff-Man-Syndrome (SMS).
747 8743289 We derived a human monoclonal autoantibody (MICA 2) from peripheral blood of a patient newly diagnosed with IDDM, which reacted with GAD65 in Western blots.
748 8743289 A sequence homology with human heat shock protein 60 (HSP60) maps to this region of GAD65 but no cross-reactivity of MICA 2 with HSP60 occurred.
749 8743289 Our data demonstrate that reactivity of an antibody in Western blots does not necessarily define a classic linear epitope of 6-8 amino acids and describe a new autoreactive epitope in GAD65 different from those reported for sera from patients with SMS.
750 8743289 Glutamate decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes (IDDM) and the neurological disorder Stiff-Man-Syndrome (SMS).
751 8743289 We derived a human monoclonal autoantibody (MICA 2) from peripheral blood of a patient newly diagnosed with IDDM, which reacted with GAD65 in Western blots.
752 8743289 A sequence homology with human heat shock protein 60 (HSP60) maps to this region of GAD65 but no cross-reactivity of MICA 2 with HSP60 occurred.
753 8743289 Our data demonstrate that reactivity of an antibody in Western blots does not necessarily define a classic linear epitope of 6-8 amino acids and describe a new autoreactive epitope in GAD65 different from those reported for sera from patients with SMS.
754 8743289 Glutamate decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes (IDDM) and the neurological disorder Stiff-Man-Syndrome (SMS).
755 8743289 We derived a human monoclonal autoantibody (MICA 2) from peripheral blood of a patient newly diagnosed with IDDM, which reacted with GAD65 in Western blots.
756 8743289 A sequence homology with human heat shock protein 60 (HSP60) maps to this region of GAD65 but no cross-reactivity of MICA 2 with HSP60 occurred.
757 8743289 Our data demonstrate that reactivity of an antibody in Western blots does not necessarily define a classic linear epitope of 6-8 amino acids and describe a new autoreactive epitope in GAD65 different from those reported for sera from patients with SMS.
758 8743289 Glutamate decarboxylase (GAD65) is a major autoantigen in insulin-dependent diabetes (IDDM) and the neurological disorder Stiff-Man-Syndrome (SMS).
759 8743289 We derived a human monoclonal autoantibody (MICA 2) from peripheral blood of a patient newly diagnosed with IDDM, which reacted with GAD65 in Western blots.
760 8743289 A sequence homology with human heat shock protein 60 (HSP60) maps to this region of GAD65 but no cross-reactivity of MICA 2 with HSP60 occurred.
761 8743289 Our data demonstrate that reactivity of an antibody in Western blots does not necessarily define a classic linear epitope of 6-8 amino acids and describe a new autoreactive epitope in GAD65 different from those reported for sera from patients with SMS.
762 8746789 Recombinant human transforming growth factor beta does not inhibit the effects of interleukin-1 beta on pancreatic islet cells.
763 8746789 The macrophage-derived cytokine, interleukin-1 beta (IL-1 beta), has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct cytotoxicity, and alteration of islet cell antigen expression.
764 8746789 Because transforming growth factor beta (TGF-beta) has been reported to inhibit IL-1 receptor expression in several lymphoid and progenitor cell lines, to induce IL-1 receptor antagonist protein (IRAP) production in human peripheral blood monocytes, and to antagonize several effects of inflammatory cytokines and because oral tolerance may be mediated in part by TGF-beta released by regulatory T lymphocytes, we investigated whether TGF-beta counteracted the effects of IL-1 beta on islet cells.
765 8746789 Islets isolated from Sprague-Dawley rats were cultured with or without recombinant human IL-1 beta and TGF-beta.
766 8746789 Accumulated insulin secretion, cytokine-induced cytotoxicity, and islet cell expression of glutamic acid decarboxylase 65 (GAD-65) and heat-shock protein 70 (HSP-70) were measured in this study.
767 8746789 We found that (1) IL-1 beta at 50 and 100 pg/ml inhibited insulin secretion by 41.9 +/- 14.8 and 52.6 +/- 3.5% and induced cytotoxicity by 46.5 +/- 17.3 and 54.1 +/- 6.1%, respectively.
768 8746789 IL-1 beta at 1000 pg/ml significantly increased HSP-70 expression and decreased GAD-65 expression. (2) TGF-beta at 0.1, 1, 10, and 40 ng/ml had no significant effect on insulin secretion and did not induce cytotoxicity, TGF-beta at 40 ng/ml had no effect on the expression of either HSP-70 or GAD-65. (3) In combination, TGF-beta at 1, 10, and 40 ng/ml did not antagonize the IL-1 beta (50 and 100 pg/ml)-induced inhibition of insulin secretion or cytotoxicity; TGF-beta (40 ng/ml) did not block the effects of IL-1 beta (1000 pg/ml) on HSP-70 or GAD-65 expression.
769 8746789 In conclusion, recombinant human TGF-beta does not counteract these effects of recombinant human IL-1 beta on rat pancreatic islet cells.
770 8746789 Recombinant human transforming growth factor beta does not inhibit the effects of interleukin-1 beta on pancreatic islet cells.
771 8746789 The macrophage-derived cytokine, interleukin-1 beta (IL-1 beta), has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct cytotoxicity, and alteration of islet cell antigen expression.
772 8746789 Because transforming growth factor beta (TGF-beta) has been reported to inhibit IL-1 receptor expression in several lymphoid and progenitor cell lines, to induce IL-1 receptor antagonist protein (IRAP) production in human peripheral blood monocytes, and to antagonize several effects of inflammatory cytokines and because oral tolerance may be mediated in part by TGF-beta released by regulatory T lymphocytes, we investigated whether TGF-beta counteracted the effects of IL-1 beta on islet cells.
773 8746789 Islets isolated from Sprague-Dawley rats were cultured with or without recombinant human IL-1 beta and TGF-beta.
774 8746789 Accumulated insulin secretion, cytokine-induced cytotoxicity, and islet cell expression of glutamic acid decarboxylase 65 (GAD-65) and heat-shock protein 70 (HSP-70) were measured in this study.
775 8746789 We found that (1) IL-1 beta at 50 and 100 pg/ml inhibited insulin secretion by 41.9 +/- 14.8 and 52.6 +/- 3.5% and induced cytotoxicity by 46.5 +/- 17.3 and 54.1 +/- 6.1%, respectively.
776 8746789 IL-1 beta at 1000 pg/ml significantly increased HSP-70 expression and decreased GAD-65 expression. (2) TGF-beta at 0.1, 1, 10, and 40 ng/ml had no significant effect on insulin secretion and did not induce cytotoxicity, TGF-beta at 40 ng/ml had no effect on the expression of either HSP-70 or GAD-65. (3) In combination, TGF-beta at 1, 10, and 40 ng/ml did not antagonize the IL-1 beta (50 and 100 pg/ml)-induced inhibition of insulin secretion or cytotoxicity; TGF-beta (40 ng/ml) did not block the effects of IL-1 beta (1000 pg/ml) on HSP-70 or GAD-65 expression.
777 8746789 In conclusion, recombinant human TGF-beta does not counteract these effects of recombinant human IL-1 beta on rat pancreatic islet cells.
778 8757636 However, reverse-transcription PCR and ELISA measurements of cytokine mRNA and protein levels showed that the GAD65-reactive T cells from both line 5 and line 12 mice produced higher levels of IL-4 and lower levels of IFN-gamma than similar T cells from standard NOD/Lt mice.
779 8760354 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease in which cytokines are thought to play an important role in beta-cell destruction and immune regulation.
780 8760354 A major target of beta-cell autoimmunity in IDDM is the enzyme glutamate decarboxylase (GAD).
781 8760354 Accordingly we cultured rat islets in the presence and absence of cytokines, and measured synthesis of both isoforms of GAD, GAD65 and GAD67, by [35S]methionine incorporation and immunoprecipitation with a rabbit antiserum that recognizes both GAD65 and GAD67.
782 8760354 Incubation of islets with interleukin (IL)-1 beta (1 ng/ml, 24 h), tumour necrosis factor alpha (TNF-alpha; 200 units/ml, 24 h) or interferon gamma (IFN-gamma; 500 units/ml, 72 h) significantly decreased the synthesis of both GAD65 and GAD67, but reduced neither total protein synthesis nor insulin accumulation in the medium or content.
783 8760354 Incubation of islets for 24 h in IFN-alpha (1000 units/ml), TNF-beta (50 ng/ml), IL 2 (1000 units/ml), IL-4 (100 ng/ml), IL-6 (10 ng/ml), IL-10 (20 ng/ml), IL-12 (10 ng/ml) or transforming growth factor beta 2 (TGF-beta 2; 5 ng/ml) did not significantly alter GAD65 or GAD67 synthesis.
784 8760354 Inhibition of GAD65 and GAD67 protein synthesis by IL-1 beta, TNF-alpha or IFN-gamma was reversed by co-incubation with the nitric oxide synthase inhibitor, NG-monomethyl arginine (NMMA).
785 8760354 Expression of both GAD65 and GAD67 mRNA, measured by RNase protection assay, was also decreased by IL-1 beta and completely restored to baseline levels by NMMA.
786 8760354 Thus the synthesis of both isoforms of islet GAD is selectively decreased in the presence of IL-1 beta, TNF-alpha or IFN-gamma by a NO-mediated mechanism, probably at the level of cytokine gene transcription.
787 8760354 As GAD autoimmunity has been previously shown to have a pathogenic role in an animal model of IDDM, its inhibition by cytokines might limit the immune response, thereby regulating the rate of beta-cell destruction in IDDM.
788 8760354 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease in which cytokines are thought to play an important role in beta-cell destruction and immune regulation.
789 8760354 A major target of beta-cell autoimmunity in IDDM is the enzyme glutamate decarboxylase (GAD).
790 8760354 Accordingly we cultured rat islets in the presence and absence of cytokines, and measured synthesis of both isoforms of GAD, GAD65 and GAD67, by [35S]methionine incorporation and immunoprecipitation with a rabbit antiserum that recognizes both GAD65 and GAD67.
791 8760354 Incubation of islets with interleukin (IL)-1 beta (1 ng/ml, 24 h), tumour necrosis factor alpha (TNF-alpha; 200 units/ml, 24 h) or interferon gamma (IFN-gamma; 500 units/ml, 72 h) significantly decreased the synthesis of both GAD65 and GAD67, but reduced neither total protein synthesis nor insulin accumulation in the medium or content.
792 8760354 Incubation of islets for 24 h in IFN-alpha (1000 units/ml), TNF-beta (50 ng/ml), IL 2 (1000 units/ml), IL-4 (100 ng/ml), IL-6 (10 ng/ml), IL-10 (20 ng/ml), IL-12 (10 ng/ml) or transforming growth factor beta 2 (TGF-beta 2; 5 ng/ml) did not significantly alter GAD65 or GAD67 synthesis.
793 8760354 Inhibition of GAD65 and GAD67 protein synthesis by IL-1 beta, TNF-alpha or IFN-gamma was reversed by co-incubation with the nitric oxide synthase inhibitor, NG-monomethyl arginine (NMMA).
794 8760354 Expression of both GAD65 and GAD67 mRNA, measured by RNase protection assay, was also decreased by IL-1 beta and completely restored to baseline levels by NMMA.
795 8760354 Thus the synthesis of both isoforms of islet GAD is selectively decreased in the presence of IL-1 beta, TNF-alpha or IFN-gamma by a NO-mediated mechanism, probably at the level of cytokine gene transcription.
796 8760354 As GAD autoimmunity has been previously shown to have a pathogenic role in an animal model of IDDM, its inhibition by cytokines might limit the immune response, thereby regulating the rate of beta-cell destruction in IDDM.
797 8760354 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease in which cytokines are thought to play an important role in beta-cell destruction and immune regulation.
798 8760354 A major target of beta-cell autoimmunity in IDDM is the enzyme glutamate decarboxylase (GAD).
799 8760354 Accordingly we cultured rat islets in the presence and absence of cytokines, and measured synthesis of both isoforms of GAD, GAD65 and GAD67, by [35S]methionine incorporation and immunoprecipitation with a rabbit antiserum that recognizes both GAD65 and GAD67.
800 8760354 Incubation of islets with interleukin (IL)-1 beta (1 ng/ml, 24 h), tumour necrosis factor alpha (TNF-alpha; 200 units/ml, 24 h) or interferon gamma (IFN-gamma; 500 units/ml, 72 h) significantly decreased the synthesis of both GAD65 and GAD67, but reduced neither total protein synthesis nor insulin accumulation in the medium or content.
801 8760354 Incubation of islets for 24 h in IFN-alpha (1000 units/ml), TNF-beta (50 ng/ml), IL 2 (1000 units/ml), IL-4 (100 ng/ml), IL-6 (10 ng/ml), IL-10 (20 ng/ml), IL-12 (10 ng/ml) or transforming growth factor beta 2 (TGF-beta 2; 5 ng/ml) did not significantly alter GAD65 or GAD67 synthesis.
802 8760354 Inhibition of GAD65 and GAD67 protein synthesis by IL-1 beta, TNF-alpha or IFN-gamma was reversed by co-incubation with the nitric oxide synthase inhibitor, NG-monomethyl arginine (NMMA).
803 8760354 Expression of both GAD65 and GAD67 mRNA, measured by RNase protection assay, was also decreased by IL-1 beta and completely restored to baseline levels by NMMA.
804 8760354 Thus the synthesis of both isoforms of islet GAD is selectively decreased in the presence of IL-1 beta, TNF-alpha or IFN-gamma by a NO-mediated mechanism, probably at the level of cytokine gene transcription.
805 8760354 As GAD autoimmunity has been previously shown to have a pathogenic role in an animal model of IDDM, its inhibition by cytokines might limit the immune response, thereby regulating the rate of beta-cell destruction in IDDM.
806 8760354 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease in which cytokines are thought to play an important role in beta-cell destruction and immune regulation.
807 8760354 A major target of beta-cell autoimmunity in IDDM is the enzyme glutamate decarboxylase (GAD).
808 8760354 Accordingly we cultured rat islets in the presence and absence of cytokines, and measured synthesis of both isoforms of GAD, GAD65 and GAD67, by [35S]methionine incorporation and immunoprecipitation with a rabbit antiserum that recognizes both GAD65 and GAD67.
809 8760354 Incubation of islets with interleukin (IL)-1 beta (1 ng/ml, 24 h), tumour necrosis factor alpha (TNF-alpha; 200 units/ml, 24 h) or interferon gamma (IFN-gamma; 500 units/ml, 72 h) significantly decreased the synthesis of both GAD65 and GAD67, but reduced neither total protein synthesis nor insulin accumulation in the medium or content.
810 8760354 Incubation of islets for 24 h in IFN-alpha (1000 units/ml), TNF-beta (50 ng/ml), IL 2 (1000 units/ml), IL-4 (100 ng/ml), IL-6 (10 ng/ml), IL-10 (20 ng/ml), IL-12 (10 ng/ml) or transforming growth factor beta 2 (TGF-beta 2; 5 ng/ml) did not significantly alter GAD65 or GAD67 synthesis.
811 8760354 Inhibition of GAD65 and GAD67 protein synthesis by IL-1 beta, TNF-alpha or IFN-gamma was reversed by co-incubation with the nitric oxide synthase inhibitor, NG-monomethyl arginine (NMMA).
812 8760354 Expression of both GAD65 and GAD67 mRNA, measured by RNase protection assay, was also decreased by IL-1 beta and completely restored to baseline levels by NMMA.
813 8760354 Thus the synthesis of both isoforms of islet GAD is selectively decreased in the presence of IL-1 beta, TNF-alpha or IFN-gamma by a NO-mediated mechanism, probably at the level of cytokine gene transcription.
814 8760354 As GAD autoimmunity has been previously shown to have a pathogenic role in an animal model of IDDM, its inhibition by cytokines might limit the immune response, thereby regulating the rate of beta-cell destruction in IDDM.
815 8760354 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease in which cytokines are thought to play an important role in beta-cell destruction and immune regulation.
816 8760354 A major target of beta-cell autoimmunity in IDDM is the enzyme glutamate decarboxylase (GAD).
817 8760354 Accordingly we cultured rat islets in the presence and absence of cytokines, and measured synthesis of both isoforms of GAD, GAD65 and GAD67, by [35S]methionine incorporation and immunoprecipitation with a rabbit antiserum that recognizes both GAD65 and GAD67.
818 8760354 Incubation of islets with interleukin (IL)-1 beta (1 ng/ml, 24 h), tumour necrosis factor alpha (TNF-alpha; 200 units/ml, 24 h) or interferon gamma (IFN-gamma; 500 units/ml, 72 h) significantly decreased the synthesis of both GAD65 and GAD67, but reduced neither total protein synthesis nor insulin accumulation in the medium or content.
819 8760354 Incubation of islets for 24 h in IFN-alpha (1000 units/ml), TNF-beta (50 ng/ml), IL 2 (1000 units/ml), IL-4 (100 ng/ml), IL-6 (10 ng/ml), IL-10 (20 ng/ml), IL-12 (10 ng/ml) or transforming growth factor beta 2 (TGF-beta 2; 5 ng/ml) did not significantly alter GAD65 or GAD67 synthesis.
820 8760354 Inhibition of GAD65 and GAD67 protein synthesis by IL-1 beta, TNF-alpha or IFN-gamma was reversed by co-incubation with the nitric oxide synthase inhibitor, NG-monomethyl arginine (NMMA).
821 8760354 Expression of both GAD65 and GAD67 mRNA, measured by RNase protection assay, was also decreased by IL-1 beta and completely restored to baseline levels by NMMA.
822 8760354 Thus the synthesis of both isoforms of islet GAD is selectively decreased in the presence of IL-1 beta, TNF-alpha or IFN-gamma by a NO-mediated mechanism, probably at the level of cytokine gene transcription.
823 8760354 As GAD autoimmunity has been previously shown to have a pathogenic role in an animal model of IDDM, its inhibition by cytokines might limit the immune response, thereby regulating the rate of beta-cell destruction in IDDM.
824 8781713 Since glutamic acid decarboxylase-65 (GAD-65) is a target autoantigen in IDDM, we investigated whether the cytokines IL-1 beta, TNF alpha IFN gamma altered islet cell expression of GAD-65 and whether the effect of cytokines on GAD-65 expression was similar to their effect on insulin secretion.
825 8781713 We found that: 1) IL-1 beta at low dose (1 U/ml) which stimulated insulin secretion, had no effect on GAD-65 expression, whereas higher doses of IL-1 beta (10, 100, 1000 U/ml) which inhibited insulin secretion, decreased GAD-65 expression. 2) TNF alpha at doses of 10, 100, 1000 U/ml which stimulated insulin secretion had no effect on GAD-65 expression. 3) IFN gamma at doses of 10, 100, 1000 U/ml had no effect on insulin secretion or on GAD-65 expression. 4) In combination, IL-1 beta plus TNF alpha and IFN gamma showed a similar inhibitory effect on GAD-65 expression as IL-1 beta alone.
826 8781713 In summary: 1) IL-1 beta dramatically inhibits GAD-65 expression. 2) TNF alpha and IFN gamma have no effect on GAD-65 expression.
827 8781713 Of these three cytokines, IL-1 beta is the primary cytokine affecting GAD-65 expression.
828 8781713 Since glutamic acid decarboxylase-65 (GAD-65) is a target autoantigen in IDDM, we investigated whether the cytokines IL-1 beta, TNF alpha IFN gamma altered islet cell expression of GAD-65 and whether the effect of cytokines on GAD-65 expression was similar to their effect on insulin secretion.
829 8781713 We found that: 1) IL-1 beta at low dose (1 U/ml) which stimulated insulin secretion, had no effect on GAD-65 expression, whereas higher doses of IL-1 beta (10, 100, 1000 U/ml) which inhibited insulin secretion, decreased GAD-65 expression. 2) TNF alpha at doses of 10, 100, 1000 U/ml which stimulated insulin secretion had no effect on GAD-65 expression. 3) IFN gamma at doses of 10, 100, 1000 U/ml had no effect on insulin secretion or on GAD-65 expression. 4) In combination, IL-1 beta plus TNF alpha and IFN gamma showed a similar inhibitory effect on GAD-65 expression as IL-1 beta alone.
830 8781713 In summary: 1) IL-1 beta dramatically inhibits GAD-65 expression. 2) TNF alpha and IFN gamma have no effect on GAD-65 expression.
831 8781713 Of these three cytokines, IL-1 beta is the primary cytokine affecting GAD-65 expression.
832 8781713 Since glutamic acid decarboxylase-65 (GAD-65) is a target autoantigen in IDDM, we investigated whether the cytokines IL-1 beta, TNF alpha IFN gamma altered islet cell expression of GAD-65 and whether the effect of cytokines on GAD-65 expression was similar to their effect on insulin secretion.
833 8781713 We found that: 1) IL-1 beta at low dose (1 U/ml) which stimulated insulin secretion, had no effect on GAD-65 expression, whereas higher doses of IL-1 beta (10, 100, 1000 U/ml) which inhibited insulin secretion, decreased GAD-65 expression. 2) TNF alpha at doses of 10, 100, 1000 U/ml which stimulated insulin secretion had no effect on GAD-65 expression. 3) IFN gamma at doses of 10, 100, 1000 U/ml had no effect on insulin secretion or on GAD-65 expression. 4) In combination, IL-1 beta plus TNF alpha and IFN gamma showed a similar inhibitory effect on GAD-65 expression as IL-1 beta alone.
834 8781713 In summary: 1) IL-1 beta dramatically inhibits GAD-65 expression. 2) TNF alpha and IFN gamma have no effect on GAD-65 expression.
835 8781713 Of these three cytokines, IL-1 beta is the primary cytokine affecting GAD-65 expression.
836 8781713 Since glutamic acid decarboxylase-65 (GAD-65) is a target autoantigen in IDDM, we investigated whether the cytokines IL-1 beta, TNF alpha IFN gamma altered islet cell expression of GAD-65 and whether the effect of cytokines on GAD-65 expression was similar to their effect on insulin secretion.
837 8781713 We found that: 1) IL-1 beta at low dose (1 U/ml) which stimulated insulin secretion, had no effect on GAD-65 expression, whereas higher doses of IL-1 beta (10, 100, 1000 U/ml) which inhibited insulin secretion, decreased GAD-65 expression. 2) TNF alpha at doses of 10, 100, 1000 U/ml which stimulated insulin secretion had no effect on GAD-65 expression. 3) IFN gamma at doses of 10, 100, 1000 U/ml had no effect on insulin secretion or on GAD-65 expression. 4) In combination, IL-1 beta plus TNF alpha and IFN gamma showed a similar inhibitory effect on GAD-65 expression as IL-1 beta alone.
838 8781713 In summary: 1) IL-1 beta dramatically inhibits GAD-65 expression. 2) TNF alpha and IFN gamma have no effect on GAD-65 expression.
839 8781713 Of these three cytokines, IL-1 beta is the primary cytokine affecting GAD-65 expression.
840 8816973 The processes that lead to the production of islet cell autoantibodies in insulin-dependent (type 1) diabetes mellitus (IDDM) are largely unknown.
841 8816973 The high relative avidities for GAD65 of MICA 1, 3, 4 and 6 and their high, nonrandom ratio of replacement versus silent mutations in the antigen binding regions indicated that the humoral response to GAD65 is driven by the antigen.
842 8816973 The results suggest that, in humans, an antigen driven B cell activation and affinity maturation process may contribute to the production of GAD65-autoantibodies found in patients with IDDM.
843 8816973 The processes that lead to the production of islet cell autoantibodies in insulin-dependent (type 1) diabetes mellitus (IDDM) are largely unknown.
844 8816973 The high relative avidities for GAD65 of MICA 1, 3, 4 and 6 and their high, nonrandom ratio of replacement versus silent mutations in the antigen binding regions indicated that the humoral response to GAD65 is driven by the antigen.
845 8816973 The results suggest that, in humans, an antigen driven B cell activation and affinity maturation process may contribute to the production of GAD65-autoantibodies found in patients with IDDM.
846 8816972 Insulin-dependent diabetes mellitus (IDDM) in the non-obese diabetic (NOD) mouse results from a T lymphocyte mediated destruction of the insulin-producing beta cells of the pancreas and serves as a model for human type I diabetes.
847 8816972 It has previously been shown that a T helper 1 (Th1) response to the islet antigen, glutamic acid decarboxylase (GAD65, henceforth GAD) spontaneously develops in NOD mice concurrent with the onset of lymphocytic infiltration into the islets (insulitis).
848 8816972 Each hybridoma displayed a unique cytokine profile when stimulated with peptides 524-538 and 527-541, assaying IL-2, IFN-gamma, and IL-5 production by peptide-stimulated hybridomas.
849 8816982 We analysed the relation between humoral and cellular immunity to multiple islet cell antigens, including human insulin, glutamate decarboxylase GAD65, tyrosine phosphatase (ICA512/IA2), human pancreas and RIN cells in 28 patients with newly diagnosed type 1 diabetes and 9 antibody-positive (Ab+) relatives at high risk for type 1 diabetes.
850 8816982 Further-more, we found that T-cell reactivity to GAD was associated with T-cell reactivity to RIN cells, whereas reactivity to ICA512 and insulin was not associated with any other T-cell response.
851 8816982 Likewise, antibody response to ICA512/IA2 correlated with antibodies to human pancreas (ICA), whereas antibody response to GAD or insulin was not related to any other antibody response.
852 8820987 After fusion of splenocytes from a Balb/c mouse which received three injections of human recombinant GAD65 44 hybridomas producing monoclonal GAD antibodies (mc-GAD Ab) could be established. 35 out of the 44 mc-GAD Ab specifically recognized the GAD65 isoform, whereas 9 showed a cross-reactivity with GAD67.
853 8824714 Rat GAD65 was expressed as a fusion protein in the expression vector RSET and inhibited ICA (GAD+ICA) in 26% of 23 recent onset patients, 29% of 14 ICA positive first degree relatives (FDR) who progressed to diabetes (prediabetics) and 50% of 20 FDR who did not progress to diabetes 18 months to 5 years (31 +/- 14 months) after collection of the sample.
854 8824714 GAD+ICA were inversely associated with the presence of insulin autoantibodies (IAA) (P = 0.006).
855 8824714 GAD antibodies (GAD-Ab) were also detected by immunoprecipitation of in vitro transcribed and translated [35S] methionine-labelled human GAD65.
856 8824714 Rat GAD65 was expressed as a fusion protein in the expression vector RSET and inhibited ICA (GAD+ICA) in 26% of 23 recent onset patients, 29% of 14 ICA positive first degree relatives (FDR) who progressed to diabetes (prediabetics) and 50% of 20 FDR who did not progress to diabetes 18 months to 5 years (31 +/- 14 months) after collection of the sample.
857 8824714 GAD+ICA were inversely associated with the presence of insulin autoantibodies (IAA) (P = 0.006).
858 8824714 GAD antibodies (GAD-Ab) were also detected by immunoprecipitation of in vitro transcribed and translated [35S] methionine-labelled human GAD65.
859 8845050 Glutamic acid decarboxylase (GAD) has been shown to exist as two isoforms with molecular weights of 65 kD (GAD65) and 67 kD (GAD67) in the central nervous system as well as in several non-neuronal tissues, including the pancreatic islets.
860 8845050 Recently, this enzyme has been proposed as a key beta-cell autoantigen in insulin-dependent diabetes mellitus (IDDM).
861 8845050 In the adult pig, GAD65 was localized exclusively in most of the beta cells, whereas GAD67, in addition to being present in a majority of the beta cells, was also seen in a proportion of glucagon and somatostatin labelled cells.
862 8845050 The predominant expression of both the isoforms in porcine beta cells suggests that islet cells from this species may act as a suitable cellular model for study of GAD autoreactivity during the early stages of IDDM.
863 8845050 Glutamic acid decarboxylase (GAD) has been shown to exist as two isoforms with molecular weights of 65 kD (GAD65) and 67 kD (GAD67) in the central nervous system as well as in several non-neuronal tissues, including the pancreatic islets.
864 8845050 Recently, this enzyme has been proposed as a key beta-cell autoantigen in insulin-dependent diabetes mellitus (IDDM).
865 8845050 In the adult pig, GAD65 was localized exclusively in most of the beta cells, whereas GAD67, in addition to being present in a majority of the beta cells, was also seen in a proportion of glucagon and somatostatin labelled cells.
866 8845050 The predominant expression of both the isoforms in porcine beta cells suggests that islet cells from this species may act as a suitable cellular model for study of GAD autoreactivity during the early stages of IDDM.
867 8864827 Detection of autoantibodies to the pancreatic islet heat shock protein 60 in insulin-dependent diabetes mellitus.
868 8864827 We found no relationship between the levels of hsp60 antibodies and islet cell antibodies (ICA) or antibodies to glutamic acid decarboxylase (GAD65) in IDDM patients.
869 8864827 Although the positivity was low, the detection of hsp60 antibodies may be helpful for diagnosis of IDDM especially in GAD65 Ab- or JCA-negative Japanese patients.
870 8864827 Detection of autoantibodies to the pancreatic islet heat shock protein 60 in insulin-dependent diabetes mellitus.
871 8864827 We found no relationship between the levels of hsp60 antibodies and islet cell antibodies (ICA) or antibodies to glutamic acid decarboxylase (GAD65) in IDDM patients.
872 8864827 Although the positivity was low, the detection of hsp60 antibodies may be helpful for diagnosis of IDDM especially in GAD65 Ab- or JCA-negative Japanese patients.
873 8877294 Diagnostic sensitivity of immunodominant epitopes of glutamic acid decarboxylase (GAD65) autoantibodies in childhood IDDM.
874 8877294 The prevalence and titre of epitope-specific autoantibodies to glutamic acid decarboxylase (GAD65) in 155 insulin-dependent diabetic (IDDM) and 9 GAD65 antibody (Ab)-positive healthy children were determined using four GAD65/67 chimaeric molecules which discriminate among the N-terminal (N), middle (M) and C-terminal (C) epitopes of GAD65.
875 8877294 We found autoantibodies to GAD65 in 116 of 155 (75%), to GAD67 in 19 of 155 (12%) (p < 0.0001) and to the GAD65-N-67 chimaera in 25 of 155 (16%) (p < 0.0001) IDDM sera.
876 8877294 We conclude that GAD65Ab in IDDM and healthy children are directed to middle and C-terminal epitopes, and propose that levels of antibodies specifically directed to the carboxy-terminal end of GAD65 may distinguish IDDM from healthy children.
877 8877294 Diagnostic sensitivity of immunodominant epitopes of glutamic acid decarboxylase (GAD65) autoantibodies in childhood IDDM.
878 8877294 The prevalence and titre of epitope-specific autoantibodies to glutamic acid decarboxylase (GAD65) in 155 insulin-dependent diabetic (IDDM) and 9 GAD65 antibody (Ab)-positive healthy children were determined using four GAD65/67 chimaeric molecules which discriminate among the N-terminal (N), middle (M) and C-terminal (C) epitopes of GAD65.
879 8877294 We found autoantibodies to GAD65 in 116 of 155 (75%), to GAD67 in 19 of 155 (12%) (p < 0.0001) and to the GAD65-N-67 chimaera in 25 of 155 (16%) (p < 0.0001) IDDM sera.
880 8877294 We conclude that GAD65Ab in IDDM and healthy children are directed to middle and C-terminal epitopes, and propose that levels of antibodies specifically directed to the carboxy-terminal end of GAD65 may distinguish IDDM from healthy children.
881 8877294 Diagnostic sensitivity of immunodominant epitopes of glutamic acid decarboxylase (GAD65) autoantibodies in childhood IDDM.
882 8877294 The prevalence and titre of epitope-specific autoantibodies to glutamic acid decarboxylase (GAD65) in 155 insulin-dependent diabetic (IDDM) and 9 GAD65 antibody (Ab)-positive healthy children were determined using four GAD65/67 chimaeric molecules which discriminate among the N-terminal (N), middle (M) and C-terminal (C) epitopes of GAD65.
883 8877294 We found autoantibodies to GAD65 in 116 of 155 (75%), to GAD67 in 19 of 155 (12%) (p < 0.0001) and to the GAD65-N-67 chimaera in 25 of 155 (16%) (p < 0.0001) IDDM sera.
884 8877294 We conclude that GAD65Ab in IDDM and healthy children are directed to middle and C-terminal epitopes, and propose that levels of antibodies specifically directed to the carboxy-terminal end of GAD65 may distinguish IDDM from healthy children.
885 8877294 Diagnostic sensitivity of immunodominant epitopes of glutamic acid decarboxylase (GAD65) autoantibodies in childhood IDDM.
886 8877294 The prevalence and titre of epitope-specific autoantibodies to glutamic acid decarboxylase (GAD65) in 155 insulin-dependent diabetic (IDDM) and 9 GAD65 antibody (Ab)-positive healthy children were determined using four GAD65/67 chimaeric molecules which discriminate among the N-terminal (N), middle (M) and C-terminal (C) epitopes of GAD65.
887 8877294 We found autoantibodies to GAD65 in 116 of 155 (75%), to GAD67 in 19 of 155 (12%) (p < 0.0001) and to the GAD65-N-67 chimaera in 25 of 155 (16%) (p < 0.0001) IDDM sera.
888 8877294 We conclude that GAD65Ab in IDDM and healthy children are directed to middle and C-terminal epitopes, and propose that levels of antibodies specifically directed to the carboxy-terminal end of GAD65 may distinguish IDDM from healthy children.
889 8904930 To study the immune response to glutamic acid decarboxylase (GAD) in insulin-dependent diabetes mellitus, monoclonal GAD antibodies after fusion of splenocytes from a nondiabetes-susceptible BALB/c mouse immunized with human recombinant GAD65 were generated.
890 8904930 Some 37 monoclonals, including all GAD65/67 reactive antibodies, react with GAD by Western blot analysis.
891 8904930 The remaining 7 GAD65 monoclonals bind GAD only in an immunoprecipitation assay, which implies that they target epitopes dependent on the conformation of the GAD molecule.
892 8904930 In conclusion, our data show that even after common immunization of a nondiabetes-susceptible mouse strain, monoclonal were obtained which preferentially react with the GAD65 linear amino-terminus (amino acids 4-17) and a conformation-dependent region located in the middle of GAD targeted by autoantibodies, indicating that this GAD region is not restricted to the autoimmune response associated with the Stiff-man syndrome and the beta-cell destruction in type 1 diabetes mellitus.
893 8904930 To study the immune response to glutamic acid decarboxylase (GAD) in insulin-dependent diabetes mellitus, monoclonal GAD antibodies after fusion of splenocytes from a nondiabetes-susceptible BALB/c mouse immunized with human recombinant GAD65 were generated.
894 8904930 Some 37 monoclonals, including all GAD65/67 reactive antibodies, react with GAD by Western blot analysis.
895 8904930 The remaining 7 GAD65 monoclonals bind GAD only in an immunoprecipitation assay, which implies that they target epitopes dependent on the conformation of the GAD molecule.
896 8904930 In conclusion, our data show that even after common immunization of a nondiabetes-susceptible mouse strain, monoclonal were obtained which preferentially react with the GAD65 linear amino-terminus (amino acids 4-17) and a conformation-dependent region located in the middle of GAD targeted by autoantibodies, indicating that this GAD region is not restricted to the autoimmune response associated with the Stiff-man syndrome and the beta-cell destruction in type 1 diabetes mellitus.
897 8904930 To study the immune response to glutamic acid decarboxylase (GAD) in insulin-dependent diabetes mellitus, monoclonal GAD antibodies after fusion of splenocytes from a nondiabetes-susceptible BALB/c mouse immunized with human recombinant GAD65 were generated.
898 8904930 Some 37 monoclonals, including all GAD65/67 reactive antibodies, react with GAD by Western blot analysis.
899 8904930 The remaining 7 GAD65 monoclonals bind GAD only in an immunoprecipitation assay, which implies that they target epitopes dependent on the conformation of the GAD molecule.
900 8904930 In conclusion, our data show that even after common immunization of a nondiabetes-susceptible mouse strain, monoclonal were obtained which preferentially react with the GAD65 linear amino-terminus (amino acids 4-17) and a conformation-dependent region located in the middle of GAD targeted by autoantibodies, indicating that this GAD region is not restricted to the autoimmune response associated with the Stiff-man syndrome and the beta-cell destruction in type 1 diabetes mellitus.
901 8904930 To study the immune response to glutamic acid decarboxylase (GAD) in insulin-dependent diabetes mellitus, monoclonal GAD antibodies after fusion of splenocytes from a nondiabetes-susceptible BALB/c mouse immunized with human recombinant GAD65 were generated.
902 8904930 Some 37 monoclonals, including all GAD65/67 reactive antibodies, react with GAD by Western blot analysis.
903 8904930 The remaining 7 GAD65 monoclonals bind GAD only in an immunoprecipitation assay, which implies that they target epitopes dependent on the conformation of the GAD molecule.
904 8904930 In conclusion, our data show that even after common immunization of a nondiabetes-susceptible mouse strain, monoclonal were obtained which preferentially react with the GAD65 linear amino-terminus (amino acids 4-17) and a conformation-dependent region located in the middle of GAD targeted by autoantibodies, indicating that this GAD region is not restricted to the autoimmune response associated with the Stiff-man syndrome and the beta-cell destruction in type 1 diabetes mellitus.
905 8932998 Proliferative lymphocyte responses to virus antigens homologous to GAD65 in IDDM.
906 8932998 Virus infection has been proposed as an initiating factor in the aetiology of insulin-dependent diabetes mellitus (IDDM).
907 8932998 The frequency of positive response to the coxsackie B viruses was also significantly higher in IDDM subjects expressing the DRB 1*04 major histocompatibility complex (MHC) haplotype than the DRB 1*03 haplotype.
908 8932998 These results indicate a disease and MHC class II association between coxsackie B virus infection and IDDM and an association between adenovirus infection and IDDM.
909 8933284 IA-2 and IA-2 beta are major autoantigens in IDDM and the precursors of the 40 kDa and 37 kDa tryptic fragments.
910 8933284 Serological studies revealed that a high percentage of patients with IDDM have autoantibodies to IA-2/IA-2 beta and that the presence of these autoantibodies in otherwise normal individuals is highly predictive in identifying those at risk of ultimately developing clinical diabetes.
911 8933284 Moreover, many patients who are ICA positive, but who do not have Abs to GAD65, have Abs to IA-2/IA-2 beta.
912 8933284 It is concluded that IA-2/IA-2 beta are major autoantigens in IDDM and together with GAD65 are responsible for much of the reactivity of ICA with pancreatic islets.
913 8933286 Detection of glutamic acid decarboxylase (GAD) autoantibodies by indirect immunofluorescence using CHO cells expressing recombinant human GAD65.
914 8933286 The reaction between human glutamic acid decarboxylase (GAD65) expressed in CHO cells and GAD antibodies was studied by indirect immunofluorescence (IIF).
915 8933286 Twelve of 26 sera from newly-diagnosed insulin-dependent diabetes mellitus (IDDM) patients displayed a variety of anti GAD specific IIF images encompassing the two extremes observed with the monoclonal antibodies.
916 8933286 Our results established differences in anti GAD antibodies in terms of their capacity to recognize human GAD65 in the context of transformed CHO cells compared with conventional IP assays.
917 8933286 Detection of glutamic acid decarboxylase (GAD) autoantibodies by indirect immunofluorescence using CHO cells expressing recombinant human GAD65.
918 8933286 The reaction between human glutamic acid decarboxylase (GAD65) expressed in CHO cells and GAD antibodies was studied by indirect immunofluorescence (IIF).
919 8933286 Twelve of 26 sera from newly-diagnosed insulin-dependent diabetes mellitus (IDDM) patients displayed a variety of anti GAD specific IIF images encompassing the two extremes observed with the monoclonal antibodies.
920 8933286 Our results established differences in anti GAD antibodies in terms of their capacity to recognize human GAD65 in the context of transformed CHO cells compared with conventional IP assays.
921 8933286 Detection of glutamic acid decarboxylase (GAD) autoantibodies by indirect immunofluorescence using CHO cells expressing recombinant human GAD65.
922 8933286 The reaction between human glutamic acid decarboxylase (GAD65) expressed in CHO cells and GAD antibodies was studied by indirect immunofluorescence (IIF).
923 8933286 Twelve of 26 sera from newly-diagnosed insulin-dependent diabetes mellitus (IDDM) patients displayed a variety of anti GAD specific IIF images encompassing the two extremes observed with the monoclonal antibodies.
924 8933286 Our results established differences in anti GAD antibodies in terms of their capacity to recognize human GAD65 in the context of transformed CHO cells compared with conventional IP assays.
925 8943434 Autoreactive islet cell Abs (ICA) accompany the pathogenic destruction of pancreatic beta cells in insulin-dependent diabetes mellitus (IDDM).
926 8943434 We have isolated 4 new ICA-reactive B cell lines, one from a DR4/DR11-positive newly diagnosed IDDM patient (MICA 7) and three from a DR3 homozygous patient with both IDDM and Graves' disease (MICA 8-10).
927 8943434 Like MICA 1-6, MICA 7-10 are specific for GAD65, suggesting that GAD65-reactive B cells dominate the ICA response in IDDM.
928 8943434 MICA 1-6, 7, and 8-10, derived from three IDDM patients of different HLA haplotypes, define six different epitopes in GAD65 and represent tools to determine the spectrum, possible HLA association, and temporal order of epitope recognition in IDDM.
929 8943434 Autoreactive islet cell Abs (ICA) accompany the pathogenic destruction of pancreatic beta cells in insulin-dependent diabetes mellitus (IDDM).
930 8943434 We have isolated 4 new ICA-reactive B cell lines, one from a DR4/DR11-positive newly diagnosed IDDM patient (MICA 7) and three from a DR3 homozygous patient with both IDDM and Graves' disease (MICA 8-10).
931 8943434 Like MICA 1-6, MICA 7-10 are specific for GAD65, suggesting that GAD65-reactive B cells dominate the ICA response in IDDM.
932 8943434 MICA 1-6, 7, and 8-10, derived from three IDDM patients of different HLA haplotypes, define six different epitopes in GAD65 and represent tools to determine the spectrum, possible HLA association, and temporal order of epitope recognition in IDDM.
933 8954025 We analyzed sequential serum samples from 155 siblings and offspring (aged < 7 yr) of patients with type I diabetes from the Denver Diabetes Autoimmunity Study in the Young study and from a separate group of first degree relatives (aged 2-40 yr) for autoantibodies reacting with three defined autoantigens: glutamic acid decarboxylase (GAD65), insulin, and ICA512/IA-2.
934 8969635 We evaluated a new, commercially developed radioimmunoprecipitation assay for measuring glutamic acid decarboxylase (GAD) antibodies by using recombinant human GAD65.
935 8969635 We found GAD antibodies in 74% (23 of 31; 95% confidence interval 55-88%), 70% (14 of 20; 46-88%), and 65% (28 of 43; 49-79%) of patients at, respectively, < or = 1 year, 1-2 years, and 2-4 years after the onset of insulin-dependent diabetes mellitus (IDDM) and in 30% (30 of 99; 21-40%) of patients with long-term diabetes (4-22 years).
936 8969635 We also detected GAD antibodies in 8% (9 of 106; 4-16%) of patients with non-insulin-dependent diabetes mellitus (NIDDM).
937 8969635 The frequency of GAD antibodies in the NIDDM group was markedly higher in the insulin-deficient patients [67% (6 of 9; 30-93%)], who initially were nonketotic and non-insulin-dependent for > or = 6 months but later became insulin dependent, than in the non-insulin-deficient patients [3% (3 of 97; 1-9%)].
938 8969635 This new commercial assay is easy to use and provides a specific and sensitive method for evaluating GAD antibodies in IDDM.
939 8989249 The aim of the present study was to investigate the presence of anti-AADC antibodies in a large cohort of patients with APS I, and in patients with isolated insulin-dependent diabetes mellitus (IDDM).
940 8989249 We found autoantibodies against AADC in 35 of 69 patients (51%) with APS I but in none of 138 patients with isolated IDDM or 91 healthy controls.
941 8989249 Of the 9 APS I patients with IDDM, 5 had antibodies against both AADC and glutamate decarboxylase, 2 against AADC only, and 2 against glutamate decarboxylase only.
942 8989249 Thus, an autoimmune reactivity against AADC may be involved in the pathogenesis of autoimmune chronic active hepatitis and vitiligo in APS I patients, whereas the role of AADC in the development of IDDM in these patients remains to be determined.
943 9028724 IA-2-autoantibodies complement GAD65-autoantibodies in new-onset IDDM patients and help predict impending diabetes in their siblings.
944 9028724 IA-2 has been identified as an autoantigen that is recognized by immunoglobulins from insulin-dependent diabetic (IDDM) patients.
945 9028724 Using a liquid phase radiobinding assay, we performed an IA-2-autoantibody (IA-2-Ab) assay in 474 IDDM patients and 482 non-diabetic control subjects aged 0-3 years.
946 9028724 IA-2-Ab levels were positively correlated with ICA titres (p < 0.001) and HLA DQ A1*0301-DQ B1*0.02 (p < 0.003) by multivariate analysis.
947 9028724 In a group of 481 non-diabetic siblings (age 0-39 years) of IDDM patients only 7 were IA-2-Ab positive (1.5%).
948 9028724 In conclusion, IA-2-Ab show a high diagnostic specificity for IDDM and are predictive markers of impending diabetes in siblings of patients.
949 9048916 Reliable genetic and immunological markers are important in the prediction of insulin-dependent diabetes mellitus (IDDM).
950 9048916 Since glutamic acid decarboxylase (GAD) is a candidate primary autoantigen, we examined the possible linkage between IDDM and the genes encoding GAD65 (GAD2, 10p11-12) and GAD67 (GAD1, 2q31) in 58 Danish IDDM affected sib pairs.
951 9048916 No evidence of linkage was found between IDDM and either of the genes encoding GAD.
952 9048916 Considering the high prevalence of GAD autoantibodies in IDDM, a putative genetic association between GAD and IDDM would be expected to affect most diabetic individuals.
953 9048916 Therefore, our data indicate that the association between GAD and IDDM is not genetically determined, and that microsatellites used in this study do not contribute to the prediction of IDDM.
954 9058186 Detection of serum autoantibodies to glutamic acid decarboxylase (GAD) is a new method to differentiate insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM).
955 9058186 We also established a sandwich ELISA for anti-GAD Ab of the IgG class using GAD65 for coating and the anti-human IgG for detection and examined 54 sera of the IDDM patients and 45 sera of normal individuals.
956 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
957 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
958 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
959 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
960 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
961 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
962 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
963 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
964 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
965 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
966 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
967 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
968 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
969 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
970 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
971 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
972 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
973 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
974 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
975 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
976 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
977 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
978 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
979 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
980 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
981 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
982 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
983 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
984 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
985 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
986 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
987 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
988 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
989 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
990 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
991 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
992 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
993 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
994 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
995 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
996 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
997 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
998 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
999 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
1000 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
1001 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
1002 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
1003 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
1004 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
1005 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
1006 9073547 Activation of CD8+ T lymphocytes in insulin-dependent diabetes mellitus.
1007 9073547 Insulin-dependent diabetes mellitus (IDDM) is a T-cell-mediated autoimmune disease directed against the insulin-secreting beta cells of the islets of Langerhans of the pancreas.
1008 9073547 We have previously shown that in organ-specific autoimmune diseases, Graves' disease (GD), and IDDM, the antigen that is specific for each of these disorders (i.e., TSH receptor for GD, glutamic acid decarboxylase-65 (GAD65) for IDDM) does not activate the disease-specific CD8+ cells as fully as CD8+ cells from normal persons.
1009 9073547 In order to identify the specific antigen responsible for triggering or maintaining autoimmunity in patients afflicted with the disease, we have studied the effects of islet (beta) cell-specific antigens GAD65, insulin, pancreatic antigen (P69), T cell epitope 69 (Tep69), and a milk-derived bovine serum albumin (BSA)-peptide-ABBOS (pre-BSA positions 157-169) on the activation of CD8+ T lymphocytes in IDDM patients.
1010 9073547 We compared the patterns of T cells activation with those mediated by an irrelevant peptide antigen, P348 (amino-terminal region of human cardiac myosin light chain-1), and also tetanus toxoid.
1011 9073547 We also studied the responses of CD8+ T lymphocytes to these IDDM-relevant and -irrelevant antigens in Hashimoto's thyroiditis patients (HT), rheumatoid arthritis patients (RA), and normal control subjects (N) to compare the pattern of responses in the other autoimmune diseases.
1012 9073547 When the response of CD8+ T lymphocytes of IDDM patients to each of the IDDM-relevant antigens was compared to that of the irrelevant antigen, only GAD65 and ABBOS showed a significantly reduced activation compared to P348 and tetanus toxoid.
1013 9073547 Moreover, CD8+ T lymphocytes of IDDM patients showed a significantly lower activation by GAD65 than those from N, HT, and RA.
1014 9073547 In conclusion, our data suggest that CD8+ T lymphocytes of IDDM patients but not those from N, HT, and RA groups have specifically reduced potential for activation in response to GAD65 but not to insulin, P69, and Tep69, whereas ABBOS exerts a less well-defined reductive effect on the activation of CD8+ lymphocytes of IDDM patients.
1015 9073547 Since CD8+ cells have been shown to contain suppressor activity, our data support the notion that a disease-specific defect in GAD65 autoantigenic induction of suppressor T lymphocytes may be important in the pathogenesis of IDDM.
1016 9075795 Combined analysis and single-step detection of GAD65 and IA2 autoantibodies in IDDM can replace the histochemical islet cell antibody test.
1017 9075797 To study the possible link between the gut immune system and IDDM, we tested the expression of the alpha4beta7-integrin, a homing receptor for MAdCAM-1, on GAD65-reactive lymphocytes.
1018 9084973 GAD65 is one of the major autoantigens associated with insulin-dependent diabetes mellitus (IDDM).
1019 9084973 The two peptides p17 and p18 of GAD65 that share sequence similarity with coxsackie virus (amino acid sequence identity: PEVKEK) appeared to be the major determinants of GAD65 recognized preferably by T cells from new-onset IDDM patients and their first degree relatives.
1020 9084973 In contrast, in our study unrelated control subjects frequently recognized the two GAD peptides (55%, 16/29), similar to first degree relatives (41%, 12/29) and IDDM patients post-onset (68%, 15/22).
1021 9084973 Moreover, this study demonstrated a positive correlation of T-cell proliferation to GAD p17 (amino acid 247-266) and p18 (amino acid 260-279) with simultaneous responses to both peptides in 13% of all subjects tested (n = 97) (p < 0.001).
1022 9084973 T-cell proliferation to GAD p17 was higher than to p18 in recent-onset diabetic patients, first degree relatives and unrelated control subjects (p < 0.02, p < 0.004, p < 0.002, respectively).
1023 9099922 Antibodies against this epitope were induced during enterovirus (including CBV) infections in initially healthy children who later progressed to clinical insulin-dependent diabetes mellitus (IDDM).
1024 9099922 Antibody responses were frequent also in constantly GAD65 antibody-negative non-diabetic children, and antibody levels did not differ between newly diagnosed IDDM patients and matched control subjects.
1025 9112029 Prevalence of GAD65 and IA-2 autoantibodies in IDDM patients affected by diabetic nephropathy.
1026 9153283 Glutamic acid decarboxylase (GAD) has been defined as a major target antigen in insulin-dependent diabetes mellitus (IDDM).
1027 9153283 To identify the molecular ligands triggering a T cell response to GAD, a panel of human GAD65-specific T lymphocyte lines was generated from peripheral blood of three recent onset IDDM patients.
1028 9153283 Our data reveal that (a) the T cell response to GAD65 is quite heterogenous in recent onset IDDM patients; (b) HLA-DR, not DQ, seems to be the principal restriction element used by T cells present at the onset of the disease; and (c) T cells responding to epitopes containing identical sequences to Coxsackie virus P2-C protein were not detected.
1029 9153283 Glutamic acid decarboxylase (GAD) has been defined as a major target antigen in insulin-dependent diabetes mellitus (IDDM).
1030 9153283 To identify the molecular ligands triggering a T cell response to GAD, a panel of human GAD65-specific T lymphocyte lines was generated from peripheral blood of three recent onset IDDM patients.
1031 9153283 Our data reveal that (a) the T cell response to GAD65 is quite heterogenous in recent onset IDDM patients; (b) HLA-DR, not DQ, seems to be the principal restriction element used by T cells present at the onset of the disease; and (c) T cells responding to epitopes containing identical sequences to Coxsackie virus P2-C protein were not detected.
1032 9179463 Combined measurements of GAD65 and ICA512 antibodies in acute onset and slowly progressive IDDM.
1033 9179463 Autoantibodies to 65 kD glutamic acid decarboxylase (GADAA) and ICA512 (ICA512AA) were measured by radioimmunoassays using as antigens in vitro transcribed and translated [35S]-methionine-labeled human GAD65 and ICA512 (IA-2).
1034 9179463 ICA512 radioassay, in combination with GAD assay may provide a useful diagnostic marker for IDDM especially in youth.
1035 9179463 Combined measurements of GAD65 and ICA512 antibodies in acute onset and slowly progressive IDDM.
1036 9179463 Autoantibodies to 65 kD glutamic acid decarboxylase (GADAA) and ICA512 (ICA512AA) were measured by radioimmunoassays using as antigens in vitro transcribed and translated [35S]-methionine-labeled human GAD65 and ICA512 (IA-2).
1037 9179463 ICA512 radioassay, in combination with GAD assay may provide a useful diagnostic marker for IDDM especially in youth.
1038 9208924 Autoantibodies to the islet-cell 65-kDa variant of glutamate decarboxylase (GAD65) are found in most insulin-dependent diabetes mellitus (IDDM) patients many years before the appearance of clinical symptoms of the disease.
1039 9220540 Autoantigens in insulin-dependent diabetes mellitus: molecular cloning and characterization of human IA-2 beta.
1040 9220540 Using recombinant human IA-2 beta, we developed a radioimmunoprecipitation assay to measure autoantibodies in the sera of patients with insulin-dependent diabetes mellitus (IDDM).
1041 9220540 Thirty-seven percent (28 of 76) of the IDDM sera-but less than 1% of the control sera (1 of 174)-reacted with IA-2 beta.
1042 9220540 The same IDDM sera tested for autoantibodies to IA-2 and glutamic acid decarboxylase (GAD65) showed that 64% (49 of 76) and 57% (43 of 76), respectively, were positive.
1043 9220540 Combination of any two markers, such as IA-2 beta and IA-2, or IA-2 beta and GAD65, or IA-2 and GAD65, revealed that 67%, 74%, and 87% of IDDM sera were positive for autoantibodies, respectively.
1044 9220540 Blocking of IDDM sera with recombinant IA-2, IA-2 beta, or GAD65 resulted in marked inhibition of reactivity of IDDM sera with pancreatic islet sections as measured by islet cell autoantibody immunofluorescence.
1045 9220540 Autoantigens in insulin-dependent diabetes mellitus: molecular cloning and characterization of human IA-2 beta.
1046 9220540 Using recombinant human IA-2 beta, we developed a radioimmunoprecipitation assay to measure autoantibodies in the sera of patients with insulin-dependent diabetes mellitus (IDDM).
1047 9220540 Thirty-seven percent (28 of 76) of the IDDM sera-but less than 1% of the control sera (1 of 174)-reacted with IA-2 beta.
1048 9220540 The same IDDM sera tested for autoantibodies to IA-2 and glutamic acid decarboxylase (GAD65) showed that 64% (49 of 76) and 57% (43 of 76), respectively, were positive.
1049 9220540 Combination of any two markers, such as IA-2 beta and IA-2, or IA-2 beta and GAD65, or IA-2 and GAD65, revealed that 67%, 74%, and 87% of IDDM sera were positive for autoantibodies, respectively.
1050 9220540 Blocking of IDDM sera with recombinant IA-2, IA-2 beta, or GAD65 resulted in marked inhibition of reactivity of IDDM sera with pancreatic islet sections as measured by islet cell autoantibody immunofluorescence.
1051 9220540 Autoantigens in insulin-dependent diabetes mellitus: molecular cloning and characterization of human IA-2 beta.
1052 9220540 Using recombinant human IA-2 beta, we developed a radioimmunoprecipitation assay to measure autoantibodies in the sera of patients with insulin-dependent diabetes mellitus (IDDM).
1053 9220540 Thirty-seven percent (28 of 76) of the IDDM sera-but less than 1% of the control sera (1 of 174)-reacted with IA-2 beta.
1054 9220540 The same IDDM sera tested for autoantibodies to IA-2 and glutamic acid decarboxylase (GAD65) showed that 64% (49 of 76) and 57% (43 of 76), respectively, were positive.
1055 9220540 Combination of any two markers, such as IA-2 beta and IA-2, or IA-2 beta and GAD65, or IA-2 and GAD65, revealed that 67%, 74%, and 87% of IDDM sera were positive for autoantibodies, respectively.
1056 9220540 Blocking of IDDM sera with recombinant IA-2, IA-2 beta, or GAD65 resulted in marked inhibition of reactivity of IDDM sera with pancreatic islet sections as measured by islet cell autoantibody immunofluorescence.
1057 9223318 Glutamic acid decarboxylase isoform 2 (GAD65; EC 4.1.1.15) has been identified as a key target autoantigen of insulin-dependent diabetes mellitus (IDDM).
1058 9223318 IDDM is genetically associated with the major histocompatibility complex (MHC), and particular alleles from the HLA-DQ and HLA-DR loci contribute to disease.
1059 9223318 We have utilized HLA-DR(alpha1*0101,beta1*0401) (hereafter referred to as DR0401), human CD4, murine class II null triple transgenic mice and recombinant GAD65 to generate T cell hybridomas, and we have used overlapping sets of peptides to map the immunodominant epitopes of this autoantigen.
1060 9223318 Immunodominant GAD65 epitopes defined in transgenic mice correspond to GAD65 regions previously shown to elicit T cell responses specifically in DR0401 IDDM patients, underscoring the validity of this approach.
1061 9223318 Glutamic acid decarboxylase isoform 2 (GAD65; EC 4.1.1.15) has been identified as a key target autoantigen of insulin-dependent diabetes mellitus (IDDM).
1062 9223318 IDDM is genetically associated with the major histocompatibility complex (MHC), and particular alleles from the HLA-DQ and HLA-DR loci contribute to disease.
1063 9223318 We have utilized HLA-DR(alpha1*0101,beta1*0401) (hereafter referred to as DR0401), human CD4, murine class II null triple transgenic mice and recombinant GAD65 to generate T cell hybridomas, and we have used overlapping sets of peptides to map the immunodominant epitopes of this autoantigen.
1064 9223318 Immunodominant GAD65 epitopes defined in transgenic mice correspond to GAD65 regions previously shown to elicit T cell responses specifically in DR0401 IDDM patients, underscoring the validity of this approach.
1065 9223318 Glutamic acid decarboxylase isoform 2 (GAD65; EC 4.1.1.15) has been identified as a key target autoantigen of insulin-dependent diabetes mellitus (IDDM).
1066 9223318 IDDM is genetically associated with the major histocompatibility complex (MHC), and particular alleles from the HLA-DQ and HLA-DR loci contribute to disease.
1067 9223318 We have utilized HLA-DR(alpha1*0101,beta1*0401) (hereafter referred to as DR0401), human CD4, murine class II null triple transgenic mice and recombinant GAD65 to generate T cell hybridomas, and we have used overlapping sets of peptides to map the immunodominant epitopes of this autoantigen.
1068 9223318 Immunodominant GAD65 epitopes defined in transgenic mice correspond to GAD65 regions previously shown to elicit T cell responses specifically in DR0401 IDDM patients, underscoring the validity of this approach.
1069 9231650 Islet antigens associated with type 1 diabetes include a recently identified protein tyrosine phosphatase-like molecule IA-2, which contains the intracellular fragment IA-2ic.
1070 9231650 To determine whether combinations of antibodies including those to IA-2 characterize and predict type 1 diabetes, we studied antibodies to IA-2, IA-2ic, glutamic acid decarboxylase (GAD65), and islet cell antibodies (ICAs) in 1) 60 newly diagnosed type 1 diabetic patients followed for 1 year, 2) 31 monozygotic twin pairs discordant for type 1 diabetes followed up to 12 years (11 twins developed diabetes), 3) 18 dizygotic twin pairs discordant for type 1 diabetes, and 4) normal healthy control subjects.
1071 9231650 Newly diagnosed type 1 diabetic patients frequently had antibodies to IA-2 (62%), IA-2ic (67%), GAD65 (77%), and ICAs (85%).
1072 9231650 In summary, IA-2 emerges as a major antigen associated with type 1 diabetes and distinct from GAD65.
1073 9231650 Islet antigens associated with type 1 diabetes include a recently identified protein tyrosine phosphatase-like molecule IA-2, which contains the intracellular fragment IA-2ic.
1074 9231650 To determine whether combinations of antibodies including those to IA-2 characterize and predict type 1 diabetes, we studied antibodies to IA-2, IA-2ic, glutamic acid decarboxylase (GAD65), and islet cell antibodies (ICAs) in 1) 60 newly diagnosed type 1 diabetic patients followed for 1 year, 2) 31 monozygotic twin pairs discordant for type 1 diabetes followed up to 12 years (11 twins developed diabetes), 3) 18 dizygotic twin pairs discordant for type 1 diabetes, and 4) normal healthy control subjects.
1075 9231650 Newly diagnosed type 1 diabetic patients frequently had antibodies to IA-2 (62%), IA-2ic (67%), GAD65 (77%), and ICAs (85%).
1076 9231650 In summary, IA-2 emerges as a major antigen associated with type 1 diabetes and distinct from GAD65.
1077 9231650 Islet antigens associated with type 1 diabetes include a recently identified protein tyrosine phosphatase-like molecule IA-2, which contains the intracellular fragment IA-2ic.
1078 9231650 To determine whether combinations of antibodies including those to IA-2 characterize and predict type 1 diabetes, we studied antibodies to IA-2, IA-2ic, glutamic acid decarboxylase (GAD65), and islet cell antibodies (ICAs) in 1) 60 newly diagnosed type 1 diabetic patients followed for 1 year, 2) 31 monozygotic twin pairs discordant for type 1 diabetes followed up to 12 years (11 twins developed diabetes), 3) 18 dizygotic twin pairs discordant for type 1 diabetes, and 4) normal healthy control subjects.
1079 9231650 Newly diagnosed type 1 diabetic patients frequently had antibodies to IA-2 (62%), IA-2ic (67%), GAD65 (77%), and ICAs (85%).
1080 9231650 In summary, IA-2 emerges as a major antigen associated with type 1 diabetes and distinct from GAD65.
1081 9237801 Polymorphism of the genes coding for the human histocompatibility leukocyte antigen class II DR and DQ molecules makes the single largest genetic contribution to the risk of developing insulin-dependent diabetes mellitus (IDDM) and can be associated with highly elevated as well as decreased disease frequency.
1082 9237801 We have generated T cell lines (TCL) with specificity for the IDDM autoantigen 65 kDa glutamic acid decarboxylase (GAD65) from lymphocytes of two patients carrying HLA class II alleles associated with distinct risk of IDDM (DRB1*0101/0401 and 1302/1501).
1083 9237801 This epitope overlaps with a central GAD peptide binding to the high risk allele DQB1*0302 and containing a Coxsackie P2C-identical mimicry sequence, raising the possibility of competition of DRB5*0101 and DQB1*0302 for binding of a central GAD65 fragment.
1084 9237801 Polymorphism of the genes coding for the human histocompatibility leukocyte antigen class II DR and DQ molecules makes the single largest genetic contribution to the risk of developing insulin-dependent diabetes mellitus (IDDM) and can be associated with highly elevated as well as decreased disease frequency.
1085 9237801 We have generated T cell lines (TCL) with specificity for the IDDM autoantigen 65 kDa glutamic acid decarboxylase (GAD65) from lymphocytes of two patients carrying HLA class II alleles associated with distinct risk of IDDM (DRB1*0101/0401 and 1302/1501).
1086 9237801 This epitope overlaps with a central GAD peptide binding to the high risk allele DQB1*0302 and containing a Coxsackie P2C-identical mimicry sequence, raising the possibility of competition of DRB5*0101 and DQB1*0302 for binding of a central GAD65 fragment.
1087 9243099 Lyp controls the number of peripheral lymphocytes by reducing T cells of the RT6+ phenotype by almost 90%.
1088 9243099 The frequency of IFN gamma and interleukin (IL)-10 mRNA expressing cells in isolated thymocytes determined by quantitative image analysis, demonstrated an increased IFN gamma: IL-10 ratio in thymocytes from lyp/lyp homozygotes compared to lyp/+ and +/+ rats.
1089 9243099 Recombinant human glutamic acid decarboxylase (GAD65) increased the number of IFN gamma and IL-10 mRNA expressing thymocytes after in vitro culture.
1090 9253351 Antibodies to glutamic acid decarboxylase-65 (GAD65) are present in a number of autoimmune disorders, such as insulin-dependent (type 1) diabetes mellitus (IDDM), stiff man syndrome, and polyendocrine autoimmune disease.
1091 9253351 Antibodies to GAD in IDDM patients usually recognize conformation-dependent regions on GAD65 and rarely bind to the second isoform, glutamic acid decarboxylase-67 (GAD67).
1092 9253351 Using chimeric GAD proteins, we have shown that b35 targets the IDDM-E1 region of GAD65 (amino acids 240-435) whereas both b78 and b96 target the IDDM-E2 region of GAD65 (amino acids 451-570).
1093 9253351 Our results indicate that antibodies to GAD65 present in nondiabetic patients with multiple autoantibodies to endocrine organs show similarities to those in IDDM (by targeting IDDM-E1 and IDDM-E2 regions of GAD65) as well as subtle differences in epitope recognition (such as binding to denatured and reduced GAD65 and by protein footprinting).
1094 9253351 Antibodies to glutamic acid decarboxylase-65 (GAD65) are present in a number of autoimmune disorders, such as insulin-dependent (type 1) diabetes mellitus (IDDM), stiff man syndrome, and polyendocrine autoimmune disease.
1095 9253351 Antibodies to GAD in IDDM patients usually recognize conformation-dependent regions on GAD65 and rarely bind to the second isoform, glutamic acid decarboxylase-67 (GAD67).
1096 9253351 Using chimeric GAD proteins, we have shown that b35 targets the IDDM-E1 region of GAD65 (amino acids 240-435) whereas both b78 and b96 target the IDDM-E2 region of GAD65 (amino acids 451-570).
1097 9253351 Our results indicate that antibodies to GAD65 present in nondiabetic patients with multiple autoantibodies to endocrine organs show similarities to those in IDDM (by targeting IDDM-E1 and IDDM-E2 regions of GAD65) as well as subtle differences in epitope recognition (such as binding to denatured and reduced GAD65 and by protein footprinting).
1098 9253351 Antibodies to glutamic acid decarboxylase-65 (GAD65) are present in a number of autoimmune disorders, such as insulin-dependent (type 1) diabetes mellitus (IDDM), stiff man syndrome, and polyendocrine autoimmune disease.
1099 9253351 Antibodies to GAD in IDDM patients usually recognize conformation-dependent regions on GAD65 and rarely bind to the second isoform, glutamic acid decarboxylase-67 (GAD67).
1100 9253351 Using chimeric GAD proteins, we have shown that b35 targets the IDDM-E1 region of GAD65 (amino acids 240-435) whereas both b78 and b96 target the IDDM-E2 region of GAD65 (amino acids 451-570).
1101 9253351 Our results indicate that antibodies to GAD65 present in nondiabetic patients with multiple autoantibodies to endocrine organs show similarities to those in IDDM (by targeting IDDM-E1 and IDDM-E2 regions of GAD65) as well as subtle differences in epitope recognition (such as binding to denatured and reduced GAD65 and by protein footprinting).
1102 9253351 Antibodies to glutamic acid decarboxylase-65 (GAD65) are present in a number of autoimmune disorders, such as insulin-dependent (type 1) diabetes mellitus (IDDM), stiff man syndrome, and polyendocrine autoimmune disease.
1103 9253351 Antibodies to GAD in IDDM patients usually recognize conformation-dependent regions on GAD65 and rarely bind to the second isoform, glutamic acid decarboxylase-67 (GAD67).
1104 9253351 Using chimeric GAD proteins, we have shown that b35 targets the IDDM-E1 region of GAD65 (amino acids 240-435) whereas both b78 and b96 target the IDDM-E2 region of GAD65 (amino acids 451-570).
1105 9253351 Our results indicate that antibodies to GAD65 present in nondiabetic patients with multiple autoantibodies to endocrine organs show similarities to those in IDDM (by targeting IDDM-E1 and IDDM-E2 regions of GAD65) as well as subtle differences in epitope recognition (such as binding to denatured and reduced GAD65 and by protein footprinting).
1106 9260198 GAD65 is targeted by different patterns of autoantibodies [glutamic acid decarboxylase (GAD)-AAbs] in insulin-dependent diabetes mellitus (IDDM) and stiff-man syndrome (SMS).
1107 9260198 This fixation procedure was used to compare the immunoreactivity of GAD-AAb+ or GAD-AAb- islet cell cytoplasmic antibody-positive (ICA+) sera of IDDM (n = 27) and SMS patients (n = 3).
1108 9260198 The three SMS sera were reactive with GAD on fixed islets but showed a reduced titer, whereas the majority of IDDM sera (22/27; 81.5%) were not detectable; 70.6% (12/ 17) of GAD-AAb+ IDDM sera were not detectable on fixed islets.
1109 9272278 The lack of protection against diabetes following GAD65 treatment could hypothetically be explained by no or by an aberrant expression of GAD in BB-rat islet cells.
1110 9300229 High prevalence of GAD65 (and IA-2) antibodies in Japanese IDDM patients by a new immunoprecipitation assay based on recombinant human GAD65.
1111 9300229 Prevalence of IA-2 antibodies was lower than that of GAD65 antibodies.
1112 9300229 High prevalence of GAD65 (and IA-2) antibodies in Japanese IDDM patients by a new immunoprecipitation assay based on recombinant human GAD65.
1113 9300229 Prevalence of IA-2 antibodies was lower than that of GAD65 antibodies.
1114 9344328 Antibodies to the 40 kD antigen (identified as tyrosine phosphatase IA-2) and glutamate decarboxylase (GAD65) are strongly associated with insulin dependent diabetes mellitus (IDDM).
1115 9358337 We describe a sandwich ELISA based on monoclonal GAD65 antibodies (Mc-GAD65-Ab) of different epitope specificities to quantify GAD65 in pancreatic islets and in different organ/cell extracts and during the preparation of GAD from brain extracts.
1116 9358337 The detection limit was estimated to be 0.03 ng GAD65/ml using alkaline phosphatase (AP)-conjugated streptavidin.
1117 9358337 We describe a sandwich ELISA based on monoclonal GAD65 antibodies (Mc-GAD65-Ab) of different epitope specificities to quantify GAD65 in pancreatic islets and in different organ/cell extracts and during the preparation of GAD from brain extracts.
1118 9358337 The detection limit was estimated to be 0.03 ng GAD65/ml using alkaline phosphatase (AP)-conjugated streptavidin.
1119 9368643 Highly-sensitive and specific enzyme-linked immunosorbent assays for GAD65 autoantibodies using a thioredoxin-GAD65 fusion antigen.
1120 9368643 Autoantibodies against glutamic acid decarboxylase (GAD65) are present in the sera of most patients with recently diagnosed insulin-dependent diabetes mellitus (IDDM).
1121 9368643 To detect GAD65 autoantibodies (GADA), we developed new enzyme-linked immunosorbent assays (ELISA) with a fusion protein thioredoxin-GAD65 (Trx-GAD65) produced in E. coli as the antigen.
1122 9368643 Highly-sensitive and specific enzyme-linked immunosorbent assays for GAD65 autoantibodies using a thioredoxin-GAD65 fusion antigen.
1123 9368643 Autoantibodies against glutamic acid decarboxylase (GAD65) are present in the sera of most patients with recently diagnosed insulin-dependent diabetes mellitus (IDDM).
1124 9368643 To detect GAD65 autoantibodies (GADA), we developed new enzyme-linked immunosorbent assays (ELISA) with a fusion protein thioredoxin-GAD65 (Trx-GAD65) produced in E. coli as the antigen.
1125 9368643 Highly-sensitive and specific enzyme-linked immunosorbent assays for GAD65 autoantibodies using a thioredoxin-GAD65 fusion antigen.
1126 9368643 Autoantibodies against glutamic acid decarboxylase (GAD65) are present in the sera of most patients with recently diagnosed insulin-dependent diabetes mellitus (IDDM).
1127 9368643 To detect GAD65 autoantibodies (GADA), we developed new enzyme-linked immunosorbent assays (ELISA) with a fusion protein thioredoxin-GAD65 (Trx-GAD65) produced in E. coli as the antigen.
1128 9392483 Quite unexpectedly, two GAD65-derived peptides near the COOH-terminus (p34 and p35) accelerated diabetes onset.
1129 9392483 Protection mediated by intrathymic administration with either intact islet cells or GAD65 were correlated with an upregulation of mRNA for T-helper 2 (Th2)-associated cytokines (interleukin [IL]-4, IL-10), concomitant with downregulation of Th1-associated interferon (IFN) transcripts (all normalized to T-cell receptor Cbeta transcripts) in islet-infiltrating lymphocytes.
1130 9392483 Protection mediated by the intrathymic administration of insulin B chain, however, correlated only with a modest upregulation of IL-4 and IL-10 transcript levels, and no diminution in IFN-gamma transcripts.
1131 9392483 In contrast, the diabetes-accelerating GAD65 p34 and p35 peptides were not associated with an immune deviation, expressing levels of IFN-gamma characteristic of islet-infiltrating lymphocytes in vehicle-injected NOD controls.
1132 9421467 GAD-reactive CD4+ Th1 cells induce diabetes in NOD/SCID mice.
1133 9421467 Although glutamic acid decarboxylase (GAD) has been implicated in IDDM, there is no direct evidence showing GAD-reactive T cells are diabetogenic in vivo.
1134 9421467 Splenocytes from this mouse showed a proliferative response to purified GAD, and were used to generate a CD4+ T cell line, designated 5A, that expresses TCRs encoding Vbeta2 and Vbeta12. 5A T cells exhibit a MHC restricted proliferative response to purified GAD, as well as GAD65 peptide 524-543.
1135 9421467 After antigen-specific stimulation, 5A T cells secrete IFNgamma and TNFalpha/beta, but not IL-4.
1136 9421467 We conclude that GAD injection in young NOD mice may, in some cases, provoke diabetes due to the activation of diabetogenic T cells reactive to GAD65 peptides.
1137 9421467 Our data provide direct evidence that GAD65 autoimmunity may be a critical event in the pathogenesis of IDDM.
1138 9421467 GAD-reactive CD4+ Th1 cells induce diabetes in NOD/SCID mice.
1139 9421467 Although glutamic acid decarboxylase (GAD) has been implicated in IDDM, there is no direct evidence showing GAD-reactive T cells are diabetogenic in vivo.
1140 9421467 Splenocytes from this mouse showed a proliferative response to purified GAD, and were used to generate a CD4+ T cell line, designated 5A, that expresses TCRs encoding Vbeta2 and Vbeta12. 5A T cells exhibit a MHC restricted proliferative response to purified GAD, as well as GAD65 peptide 524-543.
1141 9421467 After antigen-specific stimulation, 5A T cells secrete IFNgamma and TNFalpha/beta, but not IL-4.
1142 9421467 We conclude that GAD injection in young NOD mice may, in some cases, provoke diabetes due to the activation of diabetogenic T cells reactive to GAD65 peptides.
1143 9421467 Our data provide direct evidence that GAD65 autoimmunity may be a critical event in the pathogenesis of IDDM.
1144 9421467 GAD-reactive CD4+ Th1 cells induce diabetes in NOD/SCID mice.
1145 9421467 Although glutamic acid decarboxylase (GAD) has been implicated in IDDM, there is no direct evidence showing GAD-reactive T cells are diabetogenic in vivo.
1146 9421467 Splenocytes from this mouse showed a proliferative response to purified GAD, and were used to generate a CD4+ T cell line, designated 5A, that expresses TCRs encoding Vbeta2 and Vbeta12. 5A T cells exhibit a MHC restricted proliferative response to purified GAD, as well as GAD65 peptide 524-543.
1147 9421467 After antigen-specific stimulation, 5A T cells secrete IFNgamma and TNFalpha/beta, but not IL-4.
1148 9421467 We conclude that GAD injection in young NOD mice may, in some cases, provoke diabetes due to the activation of diabetogenic T cells reactive to GAD65 peptides.
1149 9421467 Our data provide direct evidence that GAD65 autoimmunity may be a critical event in the pathogenesis of IDDM.
1150 9433472 The prodromal period of insulin-dependent diabetes mellitus (IDDM) is characterized by circulating islet cell autoantibodies (ICA) and other beta cell specific autoantibodies.
1151 9433472 Despite biochemical characterization of the major beta cell autoantigens insulin, glutamic acid decarboxylase and protein tyrosine phosphatase and development of the respective antibody assays, ICA has remained the standard in IDDM prediction.
1152 9433472 Of 57 consecutive new-onset IDDM patients, 55 (96.5%) were ICA positive in the new assay while 51 (89.5%) were positive in the conventional assay suggesting that the sensitivity of TRFI exceeds that of the IAA, GAD65 and IA-2 autoantibody assays combined.
1153 9447280 Autoantibody against IA-2 improves the test sensitivity for insulin-dependent diabetes mellitus in Japanese patients of child onset.
1154 9447280 We previously reported that IA-2 autoantibodies (Ab) facilitated the diagnosis of Japanese insulin-dependent diabetes mellitus (IDDM), but the number tested was not large enough to investigate whether IA-2Ab can improve the diagnostic accuracy.
1155 9447280 In this report, sera from 78 patients with less than 2 year-disease duration (the mean (range) ages were 19.2 (6-52) years old) were tested in order to clarify that the combination of IA-2Ab and glutamic acid decarboxylase 65 (GAD65)Ab would improve the test sensitivity for IDDM.
1156 9447280 We confirmed that IA-2 antibody was detected in IDDM among Japanese, as seen in Caucasians, but the test sensitivity was improved only in young IDDM patients among Japanese.
1157 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1158 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1159 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1160 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1161 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1162 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1163 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1164 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1165 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1166 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1167 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1168 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1169 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1170 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1171 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1172 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1173 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1174 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1175 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1176 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1177 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1178 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1179 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1180 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1181 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1182 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1183 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1184 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1185 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1186 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1187 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1188 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1189 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1190 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1191 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1192 9480718 Combined analysis of GAD65 and ICA512(IA-2) autoantibodies in organ and non-organ-specific autoimmune diseases confers high specificity for insulin-dependent diabetes mellitus.
1193 9480718 There is evidence that insulin-dependent diabetes mellitus (IDDM) may develop in association with other non-beta-cell-specific autoimmune diseases.
1194 9480718 We aimed to assess whether autoantibodies to the islet cell antigens glutamic acid decarboxylase (Mr 65,000 isoform) (GAD65) and ICA512(IA-2), present alone or in combination, are limited to IDDM or also occur in other organ- or non-organ-specific autoimmune disorders.
1195 9480718 ICA512(IA-2) autoantibodies were detected exclusively in AITD with concurrent IDDM, but not in other autoimmune diseases without IDDM, whereas GAD65 autoantibodies exceeded the limit of normal in 67.7% (21 of 31) of patients with AITD who also had IDDM and in 5.5% (three of 55) of patients with PBC.
1196 9480718 The frequency of either GAD65 and/or ICA512(IA-2) autoantibodies was significantly higher in patients with AITD who also had IDDM (27 of 31, 87.1%) than in those with AITD alone (one of 53, 1.9%; P<10(-6)), but was not significantly different from those patients with newly diagnosed IDDM (418 of 507, 82.4%).
1197 9480718 Neither patients with organ- or non-organ-specific autoimmune diseases without IDDM nor healthy controls had autoantibodies against both GAD65 and ICA512(IA-2).
1198 9480718 Despite the fact that one of the two autoantibodies was occasionally detected in patients with non-beta-cell-specific autoimmune diseases without IDDM, combined determination of GAD65 and ICA512(IA-2) autoantibodies specifically identified IDDM in the majority of patients with AITD.
1199 9483382 Determination of GAD autoantibodies was performed using an enzyme immunoassay (Varelisa) which is based on a recombinant human GAD65.
1200 9498628 It has been proposed that molecular mimicry between protein 2C (p2C) of coxsackie virus B4 and the autoantigen glutamic acid decarboxylase (GAD65) plays a role in the pathogenesis of insulin-dependent diabetes mellitus (IDDM).
1201 9498628 Therefore, we tested whether the PEVKEK motif can bind to the IDDM-associated HLA-DR1, -DR3 and -DR4 molecules.
1202 9498778 A peptide binding motif for HLA-DQA1*0102/DQB1*0602, the class II MHC molecule associated with dominant protection in insulin-dependent diabetes mellitus.
1203 9498778 HLA-DQA1*0102/DQB1*0602 (DQ0602) is observed at a decreased frequency in insulin-dependent diabetes mellitus in different ethnic groups, suggesting a protective role for DQ0602.
1204 9498778 Peptides 11 amino acids long were selected from GAD65, IA-2, and proinsulin, that contained the DQ0602 peptide binding motif.
1205 9513413 [Autoantibodies against GAD and GAD65].
1206 9528889 Glutamic acid decarboxylase-65 (GAD-65) is a major target for autoantibodies and autoreactive T cells in patients with insulin-dependent diabetes mellitus (IDDM).
1207 9528889 The epitope specificities of autoantibodies to GAD in IDDM and SMS have been well documented, but the locations of autoantibody epitopes of GAD in PE patients have not been mapped.
1208 9542768 The recent cloning and recombinant expression of novel islet autoantigens [glutamic acid decarboxylase (GAD) 65 and islet-cell autoantibody 512 (ICA512)] has made possible the determination of whether the quantitative expression of autoantibodies to these molecules is correlated with age of diabetes onset and rate of progression to diabetes, similar to insulin autoantibodies (IAAs).
1209 9542768 We measured autoantibodies reacting with GAD65 (GAD65AA), ICA512 (ICA512AA), and insulin in patients who recently had received a diagnosis of diabetes and in first-degree relatives prospectively identified and then followed because of the expression of high titers of ICA.
1210 9550282 Whereas we and others have observed a delay in the onset of diabetes in NOD mice that have been fed with insulin from early life, we report here for the first time that feedings with porcine GAD65 alone (p = 0.226) or in combination with insulin (p = 0.011), have anti-diabetic effects in a prolonged study period (>400 days).
1211 9550282 IFN-gamma mRNA levels were downregulated in the islet infiltrates following oral antigen treatments while IL-2 and TNF-beta were expressed in all instances.
1212 9550282 We also observed that I.V. human recombinant GAD65, and porcine GAD given at weaning, delayed diabetes onset (p = 0.004) while similar treatments with a variety of inactive insulin preparations were generally ineffective.
1213 9550282 Whereas we and others have observed a delay in the onset of diabetes in NOD mice that have been fed with insulin from early life, we report here for the first time that feedings with porcine GAD65 alone (p = 0.226) or in combination with insulin (p = 0.011), have anti-diabetic effects in a prolonged study period (>400 days).
1214 9550282 IFN-gamma mRNA levels were downregulated in the islet infiltrates following oral antigen treatments while IL-2 and TNF-beta were expressed in all instances.
1215 9550282 We also observed that I.V. human recombinant GAD65, and porcine GAD given at weaning, delayed diabetes onset (p = 0.004) while similar treatments with a variety of inactive insulin preparations were generally ineffective.
1216 9550329 Association between autoantibody markers and subtypes of DR4 and DR4-DQ in Swedish children with insulin-dependent diabetes reveals closer association of tyrosine pyrophosphatase autoimmunity with DR4 than DQ8.
1217 9550329 HLA DQA1*0301-DQB1*0302 (DQ8) and DQA1*0501-DQB1*0201 (DQ2) are positively and DQA1*0102-DQB1*0602 (DQ6) negatively associated with IDDM.
1218 9550329 The aim of the study was to determine the association between HLA-DR4 and DQ and the presence of GAD65, ICA512, and insulin autoantibodies as well as ICA in 425 Swedish children with IDDM and 367 controls in the age group of 0-15 years.
1219 9594623 [GAD antibody in IDDM].
1220 9594623 Two forms of GAD (GAD65 and GAD67) are known to be expressed in human tissues and GAD65 is predominantly expressed in pancreatic beta-cells.
1221 9594623 Recent findings revealed that GAD functions as an autoantigen in human autoimmunity, especially in insulin-dependent diabetes mellitus (IDDM).
1222 9594623 GAD is a key antigen for the development of autoimmunity against beta-cells and the production of GADAb precedes other autoantibodies such as IAA and ICA512/IA-2Ab prior to the clinical onset of IDDM.
1223 9604865 IDDM is a T-cell-mediated autoimmune disease in which the insulin-producing beta-cells are destroyed.
1224 9604865 Furthermore, suppression of the diabetogenic response is mediated by the induction of GAD65-specific CD4+ regulatory T-cells.
1225 9628269 Glutamic acid decarboxylase (GAD) is an important autoantigen in insulin-dependent diabetes mellitus (IDDM), but little is known about its regulation and function in islet cells.
1226 9628269 In islets incubated in high glucose culture medium there was an increase in GAD activity, GAD65 and GAD67 protein levels compared to low-glucose conditions; however, even in high glucose, GVG still significantly suppressed GAD activity and GAD67 expression.
1227 9628269 Taken together, these results suggest that GVG potentially could be of use to decrease GAD expression in islet cells and consequently to deviate/inhibit the autoimmune response against the beta cells seen in IDDM.
1228 9645372 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease with a predominantly non-hereditary etiology that results in a destruction of pancreatic beta cells by autoaggressive T lymphocytes.
1229 9645372 We determined sequential epitope motifs to search for mimicry peptides stimulating T cell lines specific for two epitopes derived from the IDDM autoantigen 65-kDa glutamic acid decarboxylase (GAD65).
1230 9645372 These were GAD65 (88-99), presented by HLA-DRB1*0101, and GAD65 (248-257), presented by HLA-DRB5*0101.
1231 9645372 Our results demonstrate that mono- and polyclonal GAD65-specific T cells from IDDM patients can be stimulated by viral and bacterial peptides with little apparent sequence homology with autoantigenic epitopes.
1232 9645372 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease with a predominantly non-hereditary etiology that results in a destruction of pancreatic beta cells by autoaggressive T lymphocytes.
1233 9645372 We determined sequential epitope motifs to search for mimicry peptides stimulating T cell lines specific for two epitopes derived from the IDDM autoantigen 65-kDa glutamic acid decarboxylase (GAD65).
1234 9645372 These were GAD65 (88-99), presented by HLA-DRB1*0101, and GAD65 (248-257), presented by HLA-DRB5*0101.
1235 9645372 Our results demonstrate that mono- and polyclonal GAD65-specific T cells from IDDM patients can be stimulated by viral and bacterial peptides with little apparent sequence homology with autoantigenic epitopes.
1236 9645372 Insulin-dependent diabetes mellitus (IDDM) is an autoimmune disease with a predominantly non-hereditary etiology that results in a destruction of pancreatic beta cells by autoaggressive T lymphocytes.
1237 9645372 We determined sequential epitope motifs to search for mimicry peptides stimulating T cell lines specific for two epitopes derived from the IDDM autoantigen 65-kDa glutamic acid decarboxylase (GAD65).
1238 9645372 These were GAD65 (88-99), presented by HLA-DRB1*0101, and GAD65 (248-257), presented by HLA-DRB5*0101.
1239 9645372 Our results demonstrate that mono- and polyclonal GAD65-specific T cells from IDDM patients can be stimulated by viral and bacterial peptides with little apparent sequence homology with autoantigenic epitopes.
1240 9650286 Glutamic acid decarboxylase (GAD) is one of the major autoantigens found in insulin-dependent (Type 1) diabetes mellitus (IDDM).
1241 9650286 A novel hybrid form of GAD was created by fusing amino acids 1-101 of the human GAD67 protein to amino acids 96-585 of the human GAD65 protein.
1242 9671127 A simple and rapid microSepharose assay for GAD65 and ICA512 autoantibodies in diabetes.
1243 9698109 To study systematically the linear epitope specificity of anti-glutamic acid decarboxylase (GAD) autoantibodies associated with insulin-dependent diabetes mellitus (IDDM), we produced 93 overlapping 12-residue synthetic peptides derived from the sequence of the human GAD65 protein and covering the entire length of the protein.
1244 9698109 These peptides were used as antigens in an enzyme immunoassay to screen the sera from 10 IDDM patients, all of which contained at high level autoantibodies directed against GAD65.
1245 9698109 Two of the peptide-reactive IDDM sera, which also bound denatured recombinant GAD65 on western blots, had the highest titers of anti-GAD antibodies in ELISA assay.
1246 9698109 To study systematically the linear epitope specificity of anti-glutamic acid decarboxylase (GAD) autoantibodies associated with insulin-dependent diabetes mellitus (IDDM), we produced 93 overlapping 12-residue synthetic peptides derived from the sequence of the human GAD65 protein and covering the entire length of the protein.
1247 9698109 These peptides were used as antigens in an enzyme immunoassay to screen the sera from 10 IDDM patients, all of which contained at high level autoantibodies directed against GAD65.
1248 9698109 Two of the peptide-reactive IDDM sera, which also bound denatured recombinant GAD65 on western blots, had the highest titers of anti-GAD antibodies in ELISA assay.
1249 9698109 To study systematically the linear epitope specificity of anti-glutamic acid decarboxylase (GAD) autoantibodies associated with insulin-dependent diabetes mellitus (IDDM), we produced 93 overlapping 12-residue synthetic peptides derived from the sequence of the human GAD65 protein and covering the entire length of the protein.
1250 9698109 These peptides were used as antigens in an enzyme immunoassay to screen the sera from 10 IDDM patients, all of which contained at high level autoantibodies directed against GAD65.
1251 9698109 Two of the peptide-reactive IDDM sera, which also bound denatured recombinant GAD65 on western blots, had the highest titers of anti-GAD antibodies in ELISA assay.
1252 9699085 Since GAD65 autoantibodies (GAD65Abs) are detected against glutamic acid decarboxylase (GAD), which is mainly expressed in islets and nervous tissue in type 1 diabetic patients, the aim of the present investigation was to test the hypothesis whether GAD65Abs are associated with rapidly progressing severe retinopathy.
1253 9707599 Glutamic acid decarboxylase (GAD)65 is a pancreatic beta cell autoantigen implicated as a target of T cells that initiate and sustain insulin-dependent diabetes mellitus (IDDM) in humans and in non-obese diabetic (NOD) mice.
1254 9707599 In an attempt to establish immunological tolerance toward GAD65 in NOD mice, and thereby to test the importance of GAD in IDDM, we generated three lines transgenic for murine GAD65 driven by a major histocompatibility complex class I promoter.
1255 9707599 Thus, the failure of NOD mice to develop tolerance toward GAD65 reflects at minimum a basic defect in central tolerance, not seen in animals not predisposed to IDDM.
1256 9707599 Glutamic acid decarboxylase (GAD)65 is a pancreatic beta cell autoantigen implicated as a target of T cells that initiate and sustain insulin-dependent diabetes mellitus (IDDM) in humans and in non-obese diabetic (NOD) mice.
1257 9707599 In an attempt to establish immunological tolerance toward GAD65 in NOD mice, and thereby to test the importance of GAD in IDDM, we generated three lines transgenic for murine GAD65 driven by a major histocompatibility complex class I promoter.
1258 9707599 Thus, the failure of NOD mice to develop tolerance toward GAD65 reflects at minimum a basic defect in central tolerance, not seen in animals not predisposed to IDDM.
1259 9757911 Characterization of self-glutamic acid decarboxylase 65-reactive CD4+ T-cell clones established from Japanese patients with insulin-dependent diabetes mellitus.
1260 9757911 To investigate autoimmunity to glutamic acid decarboxylase (GAD) 65 in Japanese patients with insulin-dependent diabetes mellitus (IDDM, type I diabetes), we established seven CD4+ T-cell clones, by stimulating peripheral blood mononuclear cells (PBMC) of six IDDM patients, using a mixture of overlapping human GAD65 peptides.
1261 9768369 Antibodies to glutamic acid decarboxylase (GAD) in non-obese Japanese diabetics without insulin therapy: a comparison of two commercial RIA kits based on recombinant and pig brain GAD.
1262 9768369 To compare the clinical usefulness of commercial radioimmunoassay (RIA) kits based on recombinant and pig brain GAD, we measured glutamic acid decarboxylase autoantibody (GADAb) titers in 125 non-obese (body mass index < 24) Japanese diabetics without insulin therapy using two commercial RIA kits based on recombinant human (rh) GAD65 (GADAb Cosmic) and purified pig brain native GAD (RIP Anti-GAD Hoechst).
1263 9768369 Based on the binding study after pre-incubation of unlabeled GADs, these low titrated GADAb were elucidated to be true specific reactions to rh GAD65 alone.
1264 9768369 These findings suggest that the measurement of GADAb using a commercial assay kit with rh GAD65 may be more useful to detect non-insulin-dependent type I diabetics among non-obese patients than using a commercial kit with purified pig brain native GAD, especially among those with low GADAb titers.
1265 9768369 Antibodies to glutamic acid decarboxylase (GAD) in non-obese Japanese diabetics without insulin therapy: a comparison of two commercial RIA kits based on recombinant and pig brain GAD.
1266 9768369 To compare the clinical usefulness of commercial radioimmunoassay (RIA) kits based on recombinant and pig brain GAD, we measured glutamic acid decarboxylase autoantibody (GADAb) titers in 125 non-obese (body mass index < 24) Japanese diabetics without insulin therapy using two commercial RIA kits based on recombinant human (rh) GAD65 (GADAb Cosmic) and purified pig brain native GAD (RIP Anti-GAD Hoechst).
1267 9768369 Based on the binding study after pre-incubation of unlabeled GADs, these low titrated GADAb were elucidated to be true specific reactions to rh GAD65 alone.
1268 9768369 These findings suggest that the measurement of GADAb using a commercial assay kit with rh GAD65 may be more useful to detect non-insulin-dependent type I diabetics among non-obese patients than using a commercial kit with purified pig brain native GAD, especially among those with low GADAb titers.
1269 9768369 Antibodies to glutamic acid decarboxylase (GAD) in non-obese Japanese diabetics without insulin therapy: a comparison of two commercial RIA kits based on recombinant and pig brain GAD.
1270 9768369 To compare the clinical usefulness of commercial radioimmunoassay (RIA) kits based on recombinant and pig brain GAD, we measured glutamic acid decarboxylase autoantibody (GADAb) titers in 125 non-obese (body mass index < 24) Japanese diabetics without insulin therapy using two commercial RIA kits based on recombinant human (rh) GAD65 (GADAb Cosmic) and purified pig brain native GAD (RIP Anti-GAD Hoechst).
1271 9768369 Based on the binding study after pre-incubation of unlabeled GADs, these low titrated GADAb were elucidated to be true specific reactions to rh GAD65 alone.
1272 9768369 These findings suggest that the measurement of GADAb using a commercial assay kit with rh GAD65 may be more useful to detect non-insulin-dependent type I diabetics among non-obese patients than using a commercial kit with purified pig brain native GAD, especially among those with low GADAb titers.
1273 9771977 Autoantibodies to glutamic acid decarboxylase (GAD) are an important marker of the autoimmune-mediated beta-cell destruction in insulin-dependent (Type I) diabetes.
1274 9771977 However, these autoantibodies are also found in patients with Stiff-man syndrome (SMS) without onset of diabetes and some diabetic patients who initially present as non-insulin dependent (Type II) diabetes later becoming insulin-dependent, called as latent autoimmune diabetes in adults (LADA).
1275 9771977 The SMS sera completely abolished the GAD binding of all three monoclonals, reflecting a broader repertoire including an immune response against the IDDM-E1, a conformation-dependent GAD65 epitope region, also revealed if the SMS sera are diluted to equivalent antibody concentrations.
1276 9771977 In summary, our results show that diabetes-associated GAD autoantibodies even in adult patients with a late autoimmune process preferentially recognize a conformation-dependent middle GAD65 region.
1277 9771977 Autoantibodies to glutamic acid decarboxylase (GAD) are an important marker of the autoimmune-mediated beta-cell destruction in insulin-dependent (Type I) diabetes.
1278 9771977 However, these autoantibodies are also found in patients with Stiff-man syndrome (SMS) without onset of diabetes and some diabetic patients who initially present as non-insulin dependent (Type II) diabetes later becoming insulin-dependent, called as latent autoimmune diabetes in adults (LADA).
1279 9771977 The SMS sera completely abolished the GAD binding of all three monoclonals, reflecting a broader repertoire including an immune response against the IDDM-E1, a conformation-dependent GAD65 epitope region, also revealed if the SMS sera are diluted to equivalent antibody concentrations.
1280 9771977 In summary, our results show that diabetes-associated GAD autoantibodies even in adult patients with a late autoimmune process preferentially recognize a conformation-dependent middle GAD65 region.
1281 9776711 Glutamic acid decarboxylase autoimmunity was investigated by immunizing female BALB/c, C57B1/6, National Marine Research Institute (NMRI) and non-obese diabetic (NOD) mice once or twice with glumatic acid decarboxylase, GAD65, bovine serum albumin, or phosphate-buffered saline in incomplete Freunds adjuvant, or not treating.
1282 9776711 Mice immunized with GAD65, showed splinic T-cell reactivity to GAD 65 in vitro assessed by cytokine secretion.
1283 9776711 IL-4 and IL-10 were only detected after two immunizations with higher levels in BALB/c, NMRI and NOD mice, compared to C57B1/6 mice.
1284 9776711 In NOD mice, peri-insulitis was detected in all groups, but less so in GAD65 and bovine serum albumin (BSA) immunized animals.
1285 9776711 Glutamic acid decarboxylase autoimmunity was investigated by immunizing female BALB/c, C57B1/6, National Marine Research Institute (NMRI) and non-obese diabetic (NOD) mice once or twice with glumatic acid decarboxylase, GAD65, bovine serum albumin, or phosphate-buffered saline in incomplete Freunds adjuvant, or not treating.
1286 9776711 Mice immunized with GAD65, showed splinic T-cell reactivity to GAD 65 in vitro assessed by cytokine secretion.
1287 9776711 IL-4 and IL-10 were only detected after two immunizations with higher levels in BALB/c, NMRI and NOD mice, compared to C57B1/6 mice.
1288 9776711 In NOD mice, peri-insulitis was detected in all groups, but less so in GAD65 and bovine serum albumin (BSA) immunized animals.
1289 9776711 Glutamic acid decarboxylase autoimmunity was investigated by immunizing female BALB/c, C57B1/6, National Marine Research Institute (NMRI) and non-obese diabetic (NOD) mice once or twice with glumatic acid decarboxylase, GAD65, bovine serum albumin, or phosphate-buffered saline in incomplete Freunds adjuvant, or not treating.
1290 9776711 Mice immunized with GAD65, showed splinic T-cell reactivity to GAD 65 in vitro assessed by cytokine secretion.
1291 9776711 IL-4 and IL-10 were only detected after two immunizations with higher levels in BALB/c, NMRI and NOD mice, compared to C57B1/6 mice.
1292 9776711 In NOD mice, peri-insulitis was detected in all groups, but less so in GAD65 and bovine serum albumin (BSA) immunized animals.
1293 9840449 Peptide from glutamic acid decarboxylase similar to coxsackie B virus stimulates IFN-gamma mRNA expression in Th1-like lymphocytes from children with recent-onset insulin-dependent diabetes mellitus.
1294 9840449 CD4+ or Th-lymphocytes will be activated after stimulation resulting in interferon-gamma (IFN-gamma) production by Th1-like lymphocytes and/or interleukin-4 (IL-4) secretion from Th2-like lymphocytes.
1295 9840449 In this study we have shown that this peptide activates Th1-like lymphocytes which produce increased amounts of IFN-gamma mRNA, but seldom mRNA for IL-4.
1296 9840449 In conclusion, we suggest that GAD65 is involved in the development of type 1 diabetes and that the Th1-response may play a role in the destruction of beta cells.
1297 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1298 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1299 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1300 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1301 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1302 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1303 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1304 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1305 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1306 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1307 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1308 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1309 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1310 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1311 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1312 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1313 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1314 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1315 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1316 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1317 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1318 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1319 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1320 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1321 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1322 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1323 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1324 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1325 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1326 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1327 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1328 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1329 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1330 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1331 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1332 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1333 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1334 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1335 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1336 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1337 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1338 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1339 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1340 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1341 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1342 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1343 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1344 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1345 9892508 Glutamic acid decarboxylase (GAD) is a major autoantigen in insulin-dependent diabetes mellitus (IDDM).
1346 9892508 Two GAD isoforms exist, GAD65 and GAD67, which differ mostly in the first 100 amino acids of the amino terminus.
1347 9892508 IDDM sera are predominantly reactive with GAD65 but autoepitopes have been localised only to regions of GAD65 highly homologous with GAD67.
1348 9892508 In this study we investigated the contribution of the amino terminus to the IDDM epitope on GAD65, in order to test whether this region of GAD could explain the difference in reactivity between GAD65 and GAD67.
1349 9892508 A recombinant hybrid GAD molecule consisting of amino acids 1-101 of GAD67 and 96-585 of GAD65 was constructed and a truncated GAD65 was also constructed consisting of amino acids 98-585 of GAD65.
1350 9892508 The reactivity with the hybrid GAD molecule, GAD65 and GAD67, and truncated GAD65 was examined by radioimmunoprecipitation using 50 IDDM sera with known reactivity to purified porcine brain GAD.
1351 9892508 Over 90% of the IDDM sera were reactive with the hybrid GAD molecule confirming that the amino terminus of GAD65 does not contribute to the autoepitope and that the IDDM epitope is localised to the middle and carboxyl terminal domains of GAD65.
1352 9892508 Furthermore, evidence is presented that autoantibodies to GAD65 in IDDM sera react with an epitope formed on a dimeric configuration of the molecule.
1353 10052685 Lack of association between CTLA-4 gene polymorphism and IDDM in Japanese subjects.
1354 10052685 Susceptibility to insulin-dependent diabetes mellitus (IDDM) is determined by both environmental and genetic factors.
1355 10052685 Recent studies have described linkage and association of IDDM to the CTLA-4 gene (IDDM12) in Caucasians.
1356 10052685 We investigated the distribution of a CTLA-4 gene polymorphism in 110 Japanese patients with IDDM and 200 control subjects.
1357 10052685 In 84 patients, we also investigated associations between this CTLA-4 gene polymorphism and GAD65 antibody positivity.
1358 10052685 There was no significant difference in the distribution of CTLA-4 alleles in patients and controls and no difference was observed in prevalence of CTLA-4 alleles when GAD65 antibody-positive and -negative individuals in the IDDM groups were compared.
1359 10052685 The present study did not support an association between the CTLA-4 gene and IDDM in the Japanese population.
1360 10052685 Lack of association between CTLA-4 gene polymorphism and IDDM in Japanese subjects.
1361 10052685 Susceptibility to insulin-dependent diabetes mellitus (IDDM) is determined by both environmental and genetic factors.
1362 10052685 Recent studies have described linkage and association of IDDM to the CTLA-4 gene (IDDM12) in Caucasians.
1363 10052685 We investigated the distribution of a CTLA-4 gene polymorphism in 110 Japanese patients with IDDM and 200 control subjects.
1364 10052685 In 84 patients, we also investigated associations between this CTLA-4 gene polymorphism and GAD65 antibody positivity.
1365 10052685 There was no significant difference in the distribution of CTLA-4 alleles in patients and controls and no difference was observed in prevalence of CTLA-4 alleles when GAD65 antibody-positive and -negative individuals in the IDDM groups were compared.
1366 10052685 The present study did not support an association between the CTLA-4 gene and IDDM in the Japanese population.
1367 10078545 Major DQ8-restricted T-cell epitopes for human GAD65 mapped using human CD4, DQA1*0301, DQB1*0302 transgenic IA(null) NOD mice.
1368 10078545 To map T-cell epitopes for GAD65 restricted to the diabetes-associated DQ8 heterodimer, we generated transgenic NOD mice expressing HLA-DQ8 and human CD4 while having the mouse class II gene (IA(beta)) deleted.
1369 10078545 Major DQ8-restricted T-cell epitopes for human GAD65 mapped using human CD4, DQA1*0301, DQB1*0302 transgenic IA(null) NOD mice.
1370 10078545 To map T-cell epitopes for GAD65 restricted to the diabetes-associated DQ8 heterodimer, we generated transgenic NOD mice expressing HLA-DQ8 and human CD4 while having the mouse class II gene (IA(beta)) deleted.
1371 10080840 To investigate whether type 1 diabetes in man is associated with a preferential Th1/Th2 response, and whether autoantibodies to one of the main autoantigens would reflect such a response, we characterized the immunoglobulin isotype profile to the 65-kDa isoform of glutamic acid decarboxylase (GAD65) in siblings to IDDM patients.
1372 10080840 The rank order of anti-GAD65 immunoglobulin isotypes was similar in the siblings before and at clinical onset of IDDM, IgG1 > IgG4 > IgM > IgE > IgA > IgG3 > IgG2, but markedly different in the individuals at low risk, IgG1 > IgM > IgE > IgG4 > IgG3 > IgA > IgG2.
1373 10080840 Based on these observations, we suggest that progression to clinical onset of IDDM is associated with a maturation and a decrease in the Th2 immune response against GAD65; findings which could have implications for future intervention and prediction strategies.
1374 10080840 To investigate whether type 1 diabetes in man is associated with a preferential Th1/Th2 response, and whether autoantibodies to one of the main autoantigens would reflect such a response, we characterized the immunoglobulin isotype profile to the 65-kDa isoform of glutamic acid decarboxylase (GAD65) in siblings to IDDM patients.
1375 10080840 The rank order of anti-GAD65 immunoglobulin isotypes was similar in the siblings before and at clinical onset of IDDM, IgG1 > IgG4 > IgM > IgE > IgA > IgG3 > IgG2, but markedly different in the individuals at low risk, IgG1 > IgM > IgE > IgG4 > IgG3 > IgA > IgG2.
1376 10080840 Based on these observations, we suggest that progression to clinical onset of IDDM is associated with a maturation and a decrease in the Th2 immune response against GAD65; findings which could have implications for future intervention and prediction strategies.
1377 10096794 Towards a World Health Organization (WHO) approved standard sample for islet cell antibodies, GAD65 and IA-2 autoantibodies.
1378 10194908 The occurrence of type I diabetes is associated with autoimmunity against insulin, glutamate decarboxylase (GAD65) and the transmembrane protein IA-2.
1379 10234796 GAD65-antibodies were elevated only slightly over the cut-off of the assay before therapy (controlled by a second different RIA assay) and increased 100 fold during IFN-alpha treatment.
1380 10234796 After the end of the IFN therapy, GAD65- and IA2c antibodies remained on high levels and also ICA could now be found.
1381 10234796 GAD65-antibodies were elevated only slightly over the cut-off of the assay before therapy (controlled by a second different RIA assay) and increased 100 fold during IFN-alpha treatment.
1382 10234796 After the end of the IFN therapy, GAD65- and IA2c antibodies remained on high levels and also ICA could now be found.
1383 10330299 Only multiple autoantibodies to islet cells (ICA), insulin, GAD65, IA-2 and IA-2beta predict immune-mediated (Type 1) diabetes in relatives.
1384 10330300 GAD65 (glutamic acid decarboxylase) is an important autoantigen in both type 1 (insulin-dependent) diabetes mellitus (IDDM) and the neurological autoimmune disease stiff-man syndrome (SMS), and is expressed in pancreatic islets as well as the nervous system.
1385 10330300 To study regulation of T cell responsiveness to GAD65, we investigated a non-diabetic SMS patient with HLA-DR3/7 (predisposing to type 1 diabetes) and high levels of type 1 diabetes-associated autoantibodies against GAD65 and islet cells, and compared the results with those of her diabetic son and two other SMS patients.
1386 10330300 T cell responses to GAD65 were repeatedly absent in primary stimulation, whereas IA-2, islet antigen and tetanus toxoid induced significant T cell proliferation.
1387 10330300 These T cells produced the immunoregulatory cytokine IL-10 in combination with IFN-gamma and IL-4 (Th0).
1388 10330300 GAD65 (glutamic acid decarboxylase) is an important autoantigen in both type 1 (insulin-dependent) diabetes mellitus (IDDM) and the neurological autoimmune disease stiff-man syndrome (SMS), and is expressed in pancreatic islets as well as the nervous system.
1389 10330300 To study regulation of T cell responsiveness to GAD65, we investigated a non-diabetic SMS patient with HLA-DR3/7 (predisposing to type 1 diabetes) and high levels of type 1 diabetes-associated autoantibodies against GAD65 and islet cells, and compared the results with those of her diabetic son and two other SMS patients.
1390 10330300 T cell responses to GAD65 were repeatedly absent in primary stimulation, whereas IA-2, islet antigen and tetanus toxoid induced significant T cell proliferation.
1391 10330300 These T cells produced the immunoregulatory cytokine IL-10 in combination with IFN-gamma and IL-4 (Th0).
1392 10330300 GAD65 (glutamic acid decarboxylase) is an important autoantigen in both type 1 (insulin-dependent) diabetes mellitus (IDDM) and the neurological autoimmune disease stiff-man syndrome (SMS), and is expressed in pancreatic islets as well as the nervous system.
1393 10330300 To study regulation of T cell responsiveness to GAD65, we investigated a non-diabetic SMS patient with HLA-DR3/7 (predisposing to type 1 diabetes) and high levels of type 1 diabetes-associated autoantibodies against GAD65 and islet cells, and compared the results with those of her diabetic son and two other SMS patients.
1394 10330300 T cell responses to GAD65 were repeatedly absent in primary stimulation, whereas IA-2, islet antigen and tetanus toxoid induced significant T cell proliferation.
1395 10330300 These T cells produced the immunoregulatory cytokine IL-10 in combination with IFN-gamma and IL-4 (Th0).
1396 10333047 Glutamate decarboxylase (GAD65) and tyrosine phosphatase-like protein (IA-2) autoantibodies index in a regional population is related to glucose intolerance and body mass index.
1397 10398550 In addition, the purpose was to investigate if sample 673 could also serve as a standard for GAD65 and IA-2 antibodies.
1398 10403912 Autoantibodies and autoreactive T lymphocytes directed against several pancreatic beta cell proteins such as GAD65 have been identified in the circulation before and at the onset of clinical type 1 (insulin-dependent) diabetes.
1399 10415012 Peptide-based immunotherapy is one strategy by which to selectively suppress the T cell-mediated destruction of beta cells and treat insulin-dependent diabetes mellitus (IDDM).
1400 10415012 Here, we investigated whether a panel of T cell epitopes derived from the beta cell autoantigen glutamic acid decarboxylase 65 (GAD65) differ in their capacity to induce Th2 cell function in nonobese diabetic (NOD) mice and in turn prevent overt IDDM at different preclinical stages of disease development.
1401 10415012 Immunization with the GAD65-specific peptides did not block IDDM development in NOD mice deficient in IL-4 expression.
1402 10415012 These findings demonstrate that GAD65-specific peptide immunotherapy effectively suppresses progression to overt IDDM, requires the production of IL-4, and is dependent on the epitope targeted and the extent of preexisting beta cell autoimmunity in the recipient.
1403 10415012 Peptide-based immunotherapy is one strategy by which to selectively suppress the T cell-mediated destruction of beta cells and treat insulin-dependent diabetes mellitus (IDDM).
1404 10415012 Here, we investigated whether a panel of T cell epitopes derived from the beta cell autoantigen glutamic acid decarboxylase 65 (GAD65) differ in their capacity to induce Th2 cell function in nonobese diabetic (NOD) mice and in turn prevent overt IDDM at different preclinical stages of disease development.
1405 10415012 Immunization with the GAD65-specific peptides did not block IDDM development in NOD mice deficient in IL-4 expression.
1406 10415012 These findings demonstrate that GAD65-specific peptide immunotherapy effectively suppresses progression to overt IDDM, requires the production of IL-4, and is dependent on the epitope targeted and the extent of preexisting beta cell autoimmunity in the recipient.
1407 10415012 Peptide-based immunotherapy is one strategy by which to selectively suppress the T cell-mediated destruction of beta cells and treat insulin-dependent diabetes mellitus (IDDM).
1408 10415012 Here, we investigated whether a panel of T cell epitopes derived from the beta cell autoantigen glutamic acid decarboxylase 65 (GAD65) differ in their capacity to induce Th2 cell function in nonobese diabetic (NOD) mice and in turn prevent overt IDDM at different preclinical stages of disease development.
1409 10415012 Immunization with the GAD65-specific peptides did not block IDDM development in NOD mice deficient in IL-4 expression.
1410 10415012 These findings demonstrate that GAD65-specific peptide immunotherapy effectively suppresses progression to overt IDDM, requires the production of IL-4, and is dependent on the epitope targeted and the extent of preexisting beta cell autoimmunity in the recipient.
1411 10415074 Differential presentation of glutamic acid decarboxylase 65 (GAD65) T cell epitopes among HLA-DRB1*0401-positive individuals.
1412 10415074 When pulsed with the GAD protein, some DRB1*0401-positive B-LCL, which presented GAD65 274-286 epitope efficiently, were unable to present the GAD65 115-127 epitope.
1413 10415074 Differential presentation of glutamic acid decarboxylase 65 (GAD65) T cell epitopes among HLA-DRB1*0401-positive individuals.
1414 10415074 When pulsed with the GAD protein, some DRB1*0401-positive B-LCL, which presented GAD65 274-286 epitope efficiently, were unable to present the GAD65 115-127 epitope.
1415 10433070 Interleukin-1beta (IL-1beta) has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct islet cytotoxicity and alteration of islet cell antigen expression.
1416 10433070 We have previously demonstrated that IL-1beta inhibits glutamic acid decarboxylase-65 (GAD-65) and increases heat shock protein-70 (HSP-70) expression in islet cells.
1417 10433070 In this study we investigated the role of the NO pathway in mediating the effects of IL-1beta on GAD-65 and HSP-70 expression and on insulin secretion.
1418 10433070 Accumulated nitrite production, insulin release and islet expression of GAD-65 and HSP-70 were measured.
1419 10433070 We found that (1) IL-1beta at 10 U/ml increased nitrite production, inhibited insulin release, increased HSP-70 expression and decreased GAD-65 expression. (2) AG alone at 1 mM/ml had no effect on nitrite production, insulin release, GAD-65 and HSP-70 expression. (3) In combination, AG completely blocked IL-1beta increased nitrite production, reversed IL-1beta inhibited insulin release by approximately 50%, completely reversed IL-1beta increased HSP-70 expression, but did not reverse IL-1beta inhibited GAD-65 expression.
1420 10433070 Our findings indicate that the effect of IL-1beta on HSP-70 expression is mediated by NO production, whereas a NO-independent pathway is involved in the effect of IL-1beta on GAD-65 expression and insulin secretion.
1421 10433070 Interleukin-1beta (IL-1beta) has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct islet cytotoxicity and alteration of islet cell antigen expression.
1422 10433070 We have previously demonstrated that IL-1beta inhibits glutamic acid decarboxylase-65 (GAD-65) and increases heat shock protein-70 (HSP-70) expression in islet cells.
1423 10433070 In this study we investigated the role of the NO pathway in mediating the effects of IL-1beta on GAD-65 and HSP-70 expression and on insulin secretion.
1424 10433070 Accumulated nitrite production, insulin release and islet expression of GAD-65 and HSP-70 were measured.
1425 10433070 We found that (1) IL-1beta at 10 U/ml increased nitrite production, inhibited insulin release, increased HSP-70 expression and decreased GAD-65 expression. (2) AG alone at 1 mM/ml had no effect on nitrite production, insulin release, GAD-65 and HSP-70 expression. (3) In combination, AG completely blocked IL-1beta increased nitrite production, reversed IL-1beta inhibited insulin release by approximately 50%, completely reversed IL-1beta increased HSP-70 expression, but did not reverse IL-1beta inhibited GAD-65 expression.
1426 10433070 Our findings indicate that the effect of IL-1beta on HSP-70 expression is mediated by NO production, whereas a NO-independent pathway is involved in the effect of IL-1beta on GAD-65 expression and insulin secretion.
1427 10433070 Interleukin-1beta (IL-1beta) has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct islet cytotoxicity and alteration of islet cell antigen expression.
1428 10433070 We have previously demonstrated that IL-1beta inhibits glutamic acid decarboxylase-65 (GAD-65) and increases heat shock protein-70 (HSP-70) expression in islet cells.
1429 10433070 In this study we investigated the role of the NO pathway in mediating the effects of IL-1beta on GAD-65 and HSP-70 expression and on insulin secretion.
1430 10433070 Accumulated nitrite production, insulin release and islet expression of GAD-65 and HSP-70 were measured.
1431 10433070 We found that (1) IL-1beta at 10 U/ml increased nitrite production, inhibited insulin release, increased HSP-70 expression and decreased GAD-65 expression. (2) AG alone at 1 mM/ml had no effect on nitrite production, insulin release, GAD-65 and HSP-70 expression. (3) In combination, AG completely blocked IL-1beta increased nitrite production, reversed IL-1beta inhibited insulin release by approximately 50%, completely reversed IL-1beta increased HSP-70 expression, but did not reverse IL-1beta inhibited GAD-65 expression.
1432 10433070 Our findings indicate that the effect of IL-1beta on HSP-70 expression is mediated by NO production, whereas a NO-independent pathway is involved in the effect of IL-1beta on GAD-65 expression and insulin secretion.
1433 10433070 Interleukin-1beta (IL-1beta) has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct islet cytotoxicity and alteration of islet cell antigen expression.
1434 10433070 We have previously demonstrated that IL-1beta inhibits glutamic acid decarboxylase-65 (GAD-65) and increases heat shock protein-70 (HSP-70) expression in islet cells.
1435 10433070 In this study we investigated the role of the NO pathway in mediating the effects of IL-1beta on GAD-65 and HSP-70 expression and on insulin secretion.
1436 10433070 Accumulated nitrite production, insulin release and islet expression of GAD-65 and HSP-70 were measured.
1437 10433070 We found that (1) IL-1beta at 10 U/ml increased nitrite production, inhibited insulin release, increased HSP-70 expression and decreased GAD-65 expression. (2) AG alone at 1 mM/ml had no effect on nitrite production, insulin release, GAD-65 and HSP-70 expression. (3) In combination, AG completely blocked IL-1beta increased nitrite production, reversed IL-1beta inhibited insulin release by approximately 50%, completely reversed IL-1beta increased HSP-70 expression, but did not reverse IL-1beta inhibited GAD-65 expression.
1438 10433070 Our findings indicate that the effect of IL-1beta on HSP-70 expression is mediated by NO production, whereas a NO-independent pathway is involved in the effect of IL-1beta on GAD-65 expression and insulin secretion.
1439 10433070 Interleukin-1beta (IL-1beta) has been implicated to play an important role in the autoimmune beta cell lesion of insulin-dependent diabetes mellitus (IDDM) because of its inhibition of insulin secretion, direct islet cytotoxicity and alteration of islet cell antigen expression.
1440 10433070 We have previously demonstrated that IL-1beta inhibits glutamic acid decarboxylase-65 (GAD-65) and increases heat shock protein-70 (HSP-70) expression in islet cells.
1441 10433070 In this study we investigated the role of the NO pathway in mediating the effects of IL-1beta on GAD-65 and HSP-70 expression and on insulin secretion.
1442 10433070 Accumulated nitrite production, insulin release and islet expression of GAD-65 and HSP-70 were measured.
1443 10433070 We found that (1) IL-1beta at 10 U/ml increased nitrite production, inhibited insulin release, increased HSP-70 expression and decreased GAD-65 expression. (2) AG alone at 1 mM/ml had no effect on nitrite production, insulin release, GAD-65 and HSP-70 expression. (3) In combination, AG completely blocked IL-1beta increased nitrite production, reversed IL-1beta inhibited insulin release by approximately 50%, completely reversed IL-1beta increased HSP-70 expression, but did not reverse IL-1beta inhibited GAD-65 expression.
1444 10433070 Our findings indicate that the effect of IL-1beta on HSP-70 expression is mediated by NO production, whereas a NO-independent pathway is involved in the effect of IL-1beta on GAD-65 expression and insulin secretion.
1445 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1446 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1447 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1448 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1449 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1450 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1451 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1452 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1453 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1454 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1455 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1456 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1457 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1458 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1459 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1460 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1461 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1462 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1463 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1464 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1465 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1466 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1467 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1468 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1469 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1470 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1471 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1472 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1473 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1474 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1475 10439311 CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes.
1476 10439311 To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients.
1477 10439311 Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays.
1478 10439311 The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404.
1479 10439311 The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11.
1480 10439311 Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15.
1481 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1482 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1483 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1484 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1485 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1486 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1487 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1488 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1489 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1490 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1491 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1492 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1493 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1494 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1495 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1496 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1497 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1498 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1499 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1500 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1501 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1502 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1503 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1504 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1505 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1506 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1507 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1508 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1509 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1510 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1511 10459165 Analysis of antibody responses against coxsackie virus B4 protein 2C and the diabetes autoantigen GAD(65).
1512 10459165 In addition, a correlation of antibodies against CVB4 p2C and GAD(65) was studied in diabetes patients and in healthy controls.
1513 10459165 Antibody reactivity against CVB proteins was detected by immunoprecipitation of [(35)S]-methionine-labelled viral proteins and GAD(65) antibodies were measured in a quantitative radio-immunoassay.
1514 10459165 CVB4 p2C-specific antibodies were not only detectable in GAD(65) antibody-positive diabetes patients but also in GAD(65) antibody-negative healthy blood donors.
1515 10459165 Furthermore, GAD(65) antibodies could not be detected in p2C-positive subjects who had various enterovirus infections, indicating that an antibody response to CVB4 p2C does not necessarily induce a cross-reactive immune response against GAD(65).
1516 10459165 A correlation was not found between antibodies against GAD(65) and p2C.
1517 10512357 Identification of peptides from autoantigens GAD65 and IA-2 that bind to HLA class II molecules predisposing to or protecting from type 1 diabetes.
1518 10512357 We report clustering of binding peptides in the COOH-terminal regions of GAD65 and IA-2, as well as highly promiscuous binding patterns of some peptides.
1519 10512357 Our results demonstrate that most peptides derived from the GAD and IA-2 autoantigens can bind to both type 1 diabetes-predisposing and type 1 diabetes-protective HLA molecules, although some exceptions were observed.
1520 10512357 The binding inventory presented here for GAD and IA-2 peptides can be useful for mapping natural epitopes and predicting peptide-specific responses induced by preventive immunization.
1521 10512357 Identification of peptides from autoantigens GAD65 and IA-2 that bind to HLA class II molecules predisposing to or protecting from type 1 diabetes.
1522 10512357 We report clustering of binding peptides in the COOH-terminal regions of GAD65 and IA-2, as well as highly promiscuous binding patterns of some peptides.
1523 10512357 Our results demonstrate that most peptides derived from the GAD and IA-2 autoantigens can bind to both type 1 diabetes-predisposing and type 1 diabetes-protective HLA molecules, although some exceptions were observed.
1524 10512357 The binding inventory presented here for GAD and IA-2 peptides can be useful for mapping natural epitopes and predicting peptide-specific responses induced by preventive immunization.
1525 10580419 We show that antibodies present in the sera of newly diagnosed type 1 diabetic patients recognize BSDL and more specifically the COOH-terminal mucin-like region of the protein.
1526 10580419 Therefore, we engineered the COOH-terminal peptide of BSDL and demonstrated that autoreactivity was linked to specific glycosylation sites by at least two glycosyltransferases: the Core 2 beta(1-6)N-acetylglucosaminyltransferase and the alpha(1-3) fucosyltransferase FUT7.
1527 10580419 Interestingly, two prediabetic individuals were already positive for anti-BSDL antibodies (Abs), while islet cell cytoplasmic Abs and antibodies to GAD65, IA-2, and insulin were not detected.
1528 10586096 Most (78-91%) patient and sib responses to glutamate decarboxylase of 65 kDa (GAD65), islet cell cytoplasmic autoantibody (ICA) 69, diabetes-associated T cell epitopes in ICA69 (Tep69), and heat shock protein (Hsp) 60 involved anergic T cells that required exogenous IL-2 to proliferate.
1529 10586096 Responses to proinsulin, IA-2 (and tetanus toxoid) required no IL-2 and generated sufficient cytokine to rescue anergic T cell responses.
1530 10593565 To investigate whether GAD65 whole molecule, GAD65 p35 or insulin B chain peptide (amino acids 9-23) play an essential role in the pathogenesis of type 1 diabetes in the BioBreeding (BB) rat, we gave serial injections of GAD65, p35 or insulin B chain (9-23) to six groups of BB/Worcester rats.
1531 10594551 Autoantibodies to GAD, an important marker of the autoimmune process in type I or insulin-dependent diabetes mellitus (IDDM), are also found in non-diabetic individuals with autoimmune polyendocrine syndrome type 1 (APS1), APS2, and stiff man syndrome (SMS).
1532 10594551 Most IDDM sera contain two distinct GAD antibody specificities, one of which targets an epitope region in the middle-third of GAD65 (IDDM-E1; amino acids 221-359) and one of which targets the carboxy-third of GAD65 (IDDM-E2; amino acids 453-569).
1533 10594551 Using 11 chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of IgG antibodies from an individual with APS2-like disease (b35, b78, and b96) and MoAbs from an IDDM patient (MICA-2, MICA-3, and MICA-4).
1534 10594551 Neither the APS2 IgG antibodies nor the IDDM MoAbs bind the amino-terminal third of GAD65, but instead target the carboxy-terminal two-thirds of GAD65.
1535 10594551 These results indicate that there are both similarities and differences in the humoral response to GAD65 in APS2 and IDDM.
1536 10594551 Autoantibodies to GAD, an important marker of the autoimmune process in type I or insulin-dependent diabetes mellitus (IDDM), are also found in non-diabetic individuals with autoimmune polyendocrine syndrome type 1 (APS1), APS2, and stiff man syndrome (SMS).
1537 10594551 Most IDDM sera contain two distinct GAD antibody specificities, one of which targets an epitope region in the middle-third of GAD65 (IDDM-E1; amino acids 221-359) and one of which targets the carboxy-third of GAD65 (IDDM-E2; amino acids 453-569).
1538 10594551 Using 11 chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of IgG antibodies from an individual with APS2-like disease (b35, b78, and b96) and MoAbs from an IDDM patient (MICA-2, MICA-3, and MICA-4).
1539 10594551 Neither the APS2 IgG antibodies nor the IDDM MoAbs bind the amino-terminal third of GAD65, but instead target the carboxy-terminal two-thirds of GAD65.
1540 10594551 These results indicate that there are both similarities and differences in the humoral response to GAD65 in APS2 and IDDM.
1541 10594551 Autoantibodies to GAD, an important marker of the autoimmune process in type I or insulin-dependent diabetes mellitus (IDDM), are also found in non-diabetic individuals with autoimmune polyendocrine syndrome type 1 (APS1), APS2, and stiff man syndrome (SMS).
1542 10594551 Most IDDM sera contain two distinct GAD antibody specificities, one of which targets an epitope region in the middle-third of GAD65 (IDDM-E1; amino acids 221-359) and one of which targets the carboxy-third of GAD65 (IDDM-E2; amino acids 453-569).
1543 10594551 Using 11 chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of IgG antibodies from an individual with APS2-like disease (b35, b78, and b96) and MoAbs from an IDDM patient (MICA-2, MICA-3, and MICA-4).
1544 10594551 Neither the APS2 IgG antibodies nor the IDDM MoAbs bind the amino-terminal third of GAD65, but instead target the carboxy-terminal two-thirds of GAD65.
1545 10594551 These results indicate that there are both similarities and differences in the humoral response to GAD65 in APS2 and IDDM.
1546 10594551 Autoantibodies to GAD, an important marker of the autoimmune process in type I or insulin-dependent diabetes mellitus (IDDM), are also found in non-diabetic individuals with autoimmune polyendocrine syndrome type 1 (APS1), APS2, and stiff man syndrome (SMS).
1547 10594551 Most IDDM sera contain two distinct GAD antibody specificities, one of which targets an epitope region in the middle-third of GAD65 (IDDM-E1; amino acids 221-359) and one of which targets the carboxy-third of GAD65 (IDDM-E2; amino acids 453-569).
1548 10594551 Using 11 chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of IgG antibodies from an individual with APS2-like disease (b35, b78, and b96) and MoAbs from an IDDM patient (MICA-2, MICA-3, and MICA-4).
1549 10594551 Neither the APS2 IgG antibodies nor the IDDM MoAbs bind the amino-terminal third of GAD65, but instead target the carboxy-terminal two-thirds of GAD65.
1550 10594551 These results indicate that there are both similarities and differences in the humoral response to GAD65 in APS2 and IDDM.
1551 10615947 GAD65 and IA-2 autoantibodies along with the acute-phase response markers fibrinogen and C-reactive protein were tested in 196 serum samples from patients with type 2 diabetes and in 94 nondiabetic control subjects over the age of 65 years from the Pittsburgh cohort of the Cardiovascular Health Study.
1552 10615947 Of the diabetic patients, 12% (24 of 196) had autoantibodies against GAD65 and/or IA-2, a prevalence significantly higher than that found in nondiabetic individuals (1 of 94, 1.1%; P = 0.001).
1553 10615947 Type 2 diabetic patients who were positive for GAD65 and/or IA-2 autoantibodies (Ab+), as compared with those negative for these autoantibodies (Ab-), had an abnormal oral glucose tolerance test (OGTT) (P = 0.03) before and a higher frequency of oral hypoglycemic treatment (P = 0.003) at the time of autoantibody testing.
1554 10615947 Moreover, a statistically significant increase in fibrinogen (P = 0.005) and C-reactive protein levels (P = 0.025) was found in type 2 diabetic patients with high levels of GAD65 and/or IA-2 autoantibodies as compared with Ab-patients and control subjects.
1555 10615947 GAD65 and IA-2 autoantibodies along with the acute-phase response markers fibrinogen and C-reactive protein were tested in 196 serum samples from patients with type 2 diabetes and in 94 nondiabetic control subjects over the age of 65 years from the Pittsburgh cohort of the Cardiovascular Health Study.
1556 10615947 Of the diabetic patients, 12% (24 of 196) had autoantibodies against GAD65 and/or IA-2, a prevalence significantly higher than that found in nondiabetic individuals (1 of 94, 1.1%; P = 0.001).
1557 10615947 Type 2 diabetic patients who were positive for GAD65 and/or IA-2 autoantibodies (Ab+), as compared with those negative for these autoantibodies (Ab-), had an abnormal oral glucose tolerance test (OGTT) (P = 0.03) before and a higher frequency of oral hypoglycemic treatment (P = 0.003) at the time of autoantibody testing.
1558 10615947 Moreover, a statistically significant increase in fibrinogen (P = 0.005) and C-reactive protein levels (P = 0.025) was found in type 2 diabetic patients with high levels of GAD65 and/or IA-2 autoantibodies as compared with Ab-patients and control subjects.
1559 10615947 GAD65 and IA-2 autoantibodies along with the acute-phase response markers fibrinogen and C-reactive protein were tested in 196 serum samples from patients with type 2 diabetes and in 94 nondiabetic control subjects over the age of 65 years from the Pittsburgh cohort of the Cardiovascular Health Study.
1560 10615947 Of the diabetic patients, 12% (24 of 196) had autoantibodies against GAD65 and/or IA-2, a prevalence significantly higher than that found in nondiabetic individuals (1 of 94, 1.1%; P = 0.001).
1561 10615947 Type 2 diabetic patients who were positive for GAD65 and/or IA-2 autoantibodies (Ab+), as compared with those negative for these autoantibodies (Ab-), had an abnormal oral glucose tolerance test (OGTT) (P = 0.03) before and a higher frequency of oral hypoglycemic treatment (P = 0.003) at the time of autoantibody testing.
1562 10615947 Moreover, a statistically significant increase in fibrinogen (P = 0.005) and C-reactive protein levels (P = 0.025) was found in type 2 diabetic patients with high levels of GAD65 and/or IA-2 autoantibodies as compared with Ab-patients and control subjects.
1563 10615947 GAD65 and IA-2 autoantibodies along with the acute-phase response markers fibrinogen and C-reactive protein were tested in 196 serum samples from patients with type 2 diabetes and in 94 nondiabetic control subjects over the age of 65 years from the Pittsburgh cohort of the Cardiovascular Health Study.
1564 10615947 Of the diabetic patients, 12% (24 of 196) had autoantibodies against GAD65 and/or IA-2, a prevalence significantly higher than that found in nondiabetic individuals (1 of 94, 1.1%; P = 0.001).
1565 10615947 Type 2 diabetic patients who were positive for GAD65 and/or IA-2 autoantibodies (Ab+), as compared with those negative for these autoantibodies (Ab-), had an abnormal oral glucose tolerance test (OGTT) (P = 0.03) before and a higher frequency of oral hypoglycemic treatment (P = 0.003) at the time of autoantibody testing.
1566 10615947 Moreover, a statistically significant increase in fibrinogen (P = 0.005) and C-reactive protein levels (P = 0.025) was found in type 2 diabetic patients with high levels of GAD65 and/or IA-2 autoantibodies as compared with Ab-patients and control subjects.
1567 10671565 Two forms of glutamic-acid decarboxylase (GAD) have been identified in mammalian tissues: a 65-kDa form (GAD65) and a 67-kDa form (GAD67).
1568 10672457 Comments on the relation among GAD-65, IA-2 antibodies and body adiposity.
1569 10814590 Most insulin-dependent diabetes mellitus patients gen-erate conformational autoantibodies to the islet-cell 65-kDa variant of human glutamate decarboxylase (GAD65), and several immunochemical tests for the early detection of type-1 diabetes rely on GAD65 antibody (GADA) assessment using properly folded recombinant GAD65 as the antigen.
1570 10814590 However, this difficulty was recently surmounted in our laboratory by expressing GAD65 as a fusion protein with thioredoxin [Papouchado, Valdez, Ghiringhelli, Poskus and Ermácora (1997) Eur.
1571 10814590 The new gene was modified additionally to finally code for human GAD65 with a single amino-acid substitution: Met-161-->Thr.
1572 10814590 Also, a second 58-kDa by-product was identified as a GAD65 C-terminal proteolytic fragment that co-purifies with thioredoxin-M161T GAD65.
1573 10814590 Most insulin-dependent diabetes mellitus patients gen-erate conformational autoantibodies to the islet-cell 65-kDa variant of human glutamate decarboxylase (GAD65), and several immunochemical tests for the early detection of type-1 diabetes rely on GAD65 antibody (GADA) assessment using properly folded recombinant GAD65 as the antigen.
1574 10814590 However, this difficulty was recently surmounted in our laboratory by expressing GAD65 as a fusion protein with thioredoxin [Papouchado, Valdez, Ghiringhelli, Poskus and Ermácora (1997) Eur.
1575 10814590 The new gene was modified additionally to finally code for human GAD65 with a single amino-acid substitution: Met-161-->Thr.
1576 10814590 Also, a second 58-kDa by-product was identified as a GAD65 C-terminal proteolytic fragment that co-purifies with thioredoxin-M161T GAD65.
1577 10814590 Most insulin-dependent diabetes mellitus patients gen-erate conformational autoantibodies to the islet-cell 65-kDa variant of human glutamate decarboxylase (GAD65), and several immunochemical tests for the early detection of type-1 diabetes rely on GAD65 antibody (GADA) assessment using properly folded recombinant GAD65 as the antigen.
1578 10814590 However, this difficulty was recently surmounted in our laboratory by expressing GAD65 as a fusion protein with thioredoxin [Papouchado, Valdez, Ghiringhelli, Poskus and Ermácora (1997) Eur.
1579 10814590 The new gene was modified additionally to finally code for human GAD65 with a single amino-acid substitution: Met-161-->Thr.
1580 10814590 Also, a second 58-kDa by-product was identified as a GAD65 C-terminal proteolytic fragment that co-purifies with thioredoxin-M161T GAD65.
1581 10814590 Most insulin-dependent diabetes mellitus patients gen-erate conformational autoantibodies to the islet-cell 65-kDa variant of human glutamate decarboxylase (GAD65), and several immunochemical tests for the early detection of type-1 diabetes rely on GAD65 antibody (GADA) assessment using properly folded recombinant GAD65 as the antigen.
1582 10814590 However, this difficulty was recently surmounted in our laboratory by expressing GAD65 as a fusion protein with thioredoxin [Papouchado, Valdez, Ghiringhelli, Poskus and Ermácora (1997) Eur.
1583 10814590 The new gene was modified additionally to finally code for human GAD65 with a single amino-acid substitution: Met-161-->Thr.
1584 10814590 Also, a second 58-kDa by-product was identified as a GAD65 C-terminal proteolytic fragment that co-purifies with thioredoxin-M161T GAD65.
1585 10824708 Newly diagnosed latent autoimmune diabetes in adults (LADA) is associated with low level glutamate decarboxylase (GAD65) and IA-2 autoantibodies.
1586 10862868 We have created a hybrid form of GAD consisting of amino acids 1-101 of the human GAD67 protein fused to amino acids 96-585 of the human GAD65 protein, and have modified this to include a C-terminal hexa-Histidine (H6) tag sequence.
1587 10862868 This hybrid GAD67/65-H6 was expressed in two yeast hosts: constitutively under the control of the plasmid phosphoglycerate kinase promoter (PGK1) in Saccharomyces cerevisiae, and inducibly under the control of the chromosomal alcohol oxidase promoter (AOX1) in Pichia pastoris.
1588 10868836 Antibodies to IA-2 and GAD65 in type 1 and type 2 diabetes: isotype restriction and polyclonality.
1589 10909282 Antibodies recognising different pancreatic autoantigens (Abs) are detected many years before the clinical onset of insulin-dependent diabetes mellitus (IDDM).
1590 10909282 The aim of the study was the estimation of the prevalence and titre of the antibodies directed against protein tyrosine phosphatase-2 (IA-2) and glutamic acid decarboxylase (GAD) in patients with newly diagnosed diabetes type 1 and their first degree relatives.
1591 10909282 IA-2A and GADA were performed by radiobinding assay (RIA) using 2 microliters of serum and recombinant S35-labelled GAD65 and IA-2 antigens.
1592 10912505 Insulin-dependent diabetes mellitus (IDDM) develops in nonobese diabetic (NOD) mice through the destruction of the B cells in pancreatic Langerhans islets by islet autoantigen-specific T cells.
1593 10912505 The islet autoantigen glutamic acid decarboxylase 65 (GAD65) is thought to be a major target autoantigen in IDDM.
1594 10939716 The detection of such autoantibodies in patients with small-cell lung carcinoma (SCLC) without LEMS suggests that these autoantigens, GAD65 and IA-2, could be produced by SCLC tissue.
1595 10984128 GAD65 autoantibodies are also present in a subset of patients with type 2 diabetes who frequently become insulin dependent.
1596 10999825 We studied the association between glutamic acid decarboxylase (GAD65) and islet cell (IA-2) autoantibodies as well as autoantibodies to the autonomic nervous system and peripheral nerve function in recent onset type 1 diabetes.
1597 11033022 The format worked well using diverse antigens such as 35S-met-GAD65, 35S-met-ICA512/IA2, 35S-met-Phogrin, and 125I-insulin, and could be used for simultaneous screening of reactivity to both GAD65 and ICA512/IA2 in the same well.
1598 11033022 Diagnostic accuracy compared favorably with microcentrifuge tube-based Protein A-agarose GAD65 and IA2 autoantibody radiobinding assays and with acid-charcoal-polyethylene glycol (PEG) based competitive insulin autoantibody assays.
1599 11033022 Total serum volumes required were only 6 microl for GAD and ICA512, and only 15 microl for IAA.
1600 11033022 The format worked well using diverse antigens such as 35S-met-GAD65, 35S-met-ICA512/IA2, 35S-met-Phogrin, and 125I-insulin, and could be used for simultaneous screening of reactivity to both GAD65 and ICA512/IA2 in the same well.
1601 11033022 Diagnostic accuracy compared favorably with microcentrifuge tube-based Protein A-agarose GAD65 and IA2 autoantibody radiobinding assays and with acid-charcoal-polyethylene glycol (PEG) based competitive insulin autoantibody assays.
1602 11033022 Total serum volumes required were only 6 microl for GAD and ICA512, and only 15 microl for IAA.
1603 11049787 The patient did not develop antibodies to GAD(65) either.
1604 11049787 Absence of evidence for direct cytolytic action or an indirect effect through molecular mimicry with GAD(65) in the present case raises the possibility of another indirect pathway through which enteroviruses can cause diabetes mellitus.
1605 11049787 The patient did not develop antibodies to GAD(65) either.
1606 11049787 Absence of evidence for direct cytolytic action or an indirect effect through molecular mimicry with GAD(65) in the present case raises the possibility of another indirect pathway through which enteroviruses can cause diabetes mellitus.
1607 11106928 In addition, the T cell activation markers HLA-DR, IL-2 receptor and transferrin receptor) were not upregulated.
1608 11106928 Anti-glutamate decarboxylase (GAD65) and anti-IA-2 antibodies remained persistently high.
1609 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1610 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1611 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1612 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1613 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1614 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1615 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1616 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1617 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1618 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1619 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1620 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1621 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1622 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1623 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1624 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1625 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1626 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1627 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1628 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1629 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1630 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1631 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1632 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1633 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1634 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1635 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1636 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1637 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1638 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1639 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1640 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1641 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1642 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1643 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1644 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1645 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1646 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1647 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1648 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1649 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1650 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1651 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1652 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1653 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1654 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1655 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1656 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1657 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1658 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1659 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1660 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1661 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1662 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1663 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1664 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1665 11121550 Novel fusion proteins in the analysis of diabetes-associated autoantibodies to GAD65 and IA-2.
1666 11121550 Assays to detect autoantibodies to glutamic acid decarboxylase (GAD65) and the protein tyrosine phosphatase-like molecule IA-2, which are both present in pancreatic islets, have been used in the diagnosis and prediction of type 1 diabetes.
1667 11121550 In this study a novel fusion protein combining the entire GAD65 molecule with the 40 kDa intracellular domain of IA-2 (GAD-IA-2) was constructed to detect autoantibodies to both antigens by one single assay.
1668 11121550 For the same purpose a truncated version of this fusion protein which contained the entire GAD65 linked to the 203 carboxy-terminal amino acids of IA-2 (GAD-dIA-2) was made.
1669 11121550 A panel of 34 diabetic sera which represented unequivocally positive or negative antibody responses to GAD65 and/or IA-2 as well as 20 serum samples from healthy controls were tested in a radioligand binding assay with the constructed fusion proteins as antigens.
1670 11121550 Nine of the samples from patients with type 1 diabetes reacted with GAD65 while being negative for IA-2.
1671 11121550 The full-length, as well as the truncated fusion protein detected all samples positive for antibodies either to GAD65 or IA-2 or both, except for one GAD65 antibody positive sample.
1672 11121550 We conclude that the principle of a combinatorial molecule where a fusion protein expresses both GAD65 and IA-2 epitopes is feasible, and such a fusion protein can be used instead of the single antigens to reduce time and costs of large-scale screening for clinical purposes.
1673 11160264 In this study, we have investigated the use of plasmid DNA (pDNA) vaccination to elicit Th2 effector cell function in an Ag-specific manner and in turn prevent insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice. pDNA recombinants were engineered encoding a secreted fusion protein consisting of a fragment of glutamic acid decarboxylase 65 (GAD65) linked to IgGFc, and IL-4.
1674 11160264 Intramuscular injection of pDNA encoding GAD65-IgGFc and IL-4 effectively prevented diabetes in NOD mice treated at early or late preclinical stages of IDDM.
1675 11160264 This protection was GAD65-specific since NOD mice immunized with pDNA encoding hen egg lysozyme-IgGFc and IL-4 continued to develop diabetes.
1676 11160264 Importantly, GAD65-specific immune deviation was dependent on pDNA-encoded IL-4.
1677 11160264 In fact, GAD65-specific Th1 cell reactivity was significantly enhanced in animals immunized with pDNA encoding only GAD65-IgGFc.
1678 11160264 In this study, we have investigated the use of plasmid DNA (pDNA) vaccination to elicit Th2 effector cell function in an Ag-specific manner and in turn prevent insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice. pDNA recombinants were engineered encoding a secreted fusion protein consisting of a fragment of glutamic acid decarboxylase 65 (GAD65) linked to IgGFc, and IL-4.
1679 11160264 Intramuscular injection of pDNA encoding GAD65-IgGFc and IL-4 effectively prevented diabetes in NOD mice treated at early or late preclinical stages of IDDM.
1680 11160264 This protection was GAD65-specific since NOD mice immunized with pDNA encoding hen egg lysozyme-IgGFc and IL-4 continued to develop diabetes.
1681 11160264 Importantly, GAD65-specific immune deviation was dependent on pDNA-encoded IL-4.
1682 11160264 In fact, GAD65-specific Th1 cell reactivity was significantly enhanced in animals immunized with pDNA encoding only GAD65-IgGFc.
1683 11160264 In this study, we have investigated the use of plasmid DNA (pDNA) vaccination to elicit Th2 effector cell function in an Ag-specific manner and in turn prevent insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice. pDNA recombinants were engineered encoding a secreted fusion protein consisting of a fragment of glutamic acid decarboxylase 65 (GAD65) linked to IgGFc, and IL-4.
1684 11160264 Intramuscular injection of pDNA encoding GAD65-IgGFc and IL-4 effectively prevented diabetes in NOD mice treated at early or late preclinical stages of IDDM.
1685 11160264 This protection was GAD65-specific since NOD mice immunized with pDNA encoding hen egg lysozyme-IgGFc and IL-4 continued to develop diabetes.
1686 11160264 Importantly, GAD65-specific immune deviation was dependent on pDNA-encoded IL-4.
1687 11160264 In fact, GAD65-specific Th1 cell reactivity was significantly enhanced in animals immunized with pDNA encoding only GAD65-IgGFc.
1688 11160264 In this study, we have investigated the use of plasmid DNA (pDNA) vaccination to elicit Th2 effector cell function in an Ag-specific manner and in turn prevent insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice. pDNA recombinants were engineered encoding a secreted fusion protein consisting of a fragment of glutamic acid decarboxylase 65 (GAD65) linked to IgGFc, and IL-4.
1689 11160264 Intramuscular injection of pDNA encoding GAD65-IgGFc and IL-4 effectively prevented diabetes in NOD mice treated at early or late preclinical stages of IDDM.
1690 11160264 This protection was GAD65-specific since NOD mice immunized with pDNA encoding hen egg lysozyme-IgGFc and IL-4 continued to develop diabetes.
1691 11160264 Importantly, GAD65-specific immune deviation was dependent on pDNA-encoded IL-4.
1692 11160264 In fact, GAD65-specific Th1 cell reactivity was significantly enhanced in animals immunized with pDNA encoding only GAD65-IgGFc.
1693 11172025 We identified a naturally presented autoantigen from the human islet antigen glutamic acid decarboxylase, 65-kDa isoform (GAD65), by using a combination of chromatography and mass spectrometry of peptides bound by the type I diabetes (insulin-dependent diabetes mellitus, IDDM)-associated HLA-DR4 molecule.
1694 11172025 Peptides encompassing this epitope-stimulated GAD65-specific T cells from diabetic patients and a DR4-positive individual at high risk for developing IDDM.
1695 11172025 This direct identification and manipulation of GAD65 epitope recognition provides an approach toward dissection of the complex CD4(+) T cell response in IDDM.
1696 11172025 We identified a naturally presented autoantigen from the human islet antigen glutamic acid decarboxylase, 65-kDa isoform (GAD65), by using a combination of chromatography and mass spectrometry of peptides bound by the type I diabetes (insulin-dependent diabetes mellitus, IDDM)-associated HLA-DR4 molecule.
1697 11172025 Peptides encompassing this epitope-stimulated GAD65-specific T cells from diabetic patients and a DR4-positive individual at high risk for developing IDDM.
1698 11172025 This direct identification and manipulation of GAD65 epitope recognition provides an approach toward dissection of the complex CD4(+) T cell response in IDDM.
1699 11172025 We identified a naturally presented autoantigen from the human islet antigen glutamic acid decarboxylase, 65-kDa isoform (GAD65), by using a combination of chromatography and mass spectrometry of peptides bound by the type I diabetes (insulin-dependent diabetes mellitus, IDDM)-associated HLA-DR4 molecule.
1700 11172025 Peptides encompassing this epitope-stimulated GAD65-specific T cells from diabetic patients and a DR4-positive individual at high risk for developing IDDM.
1701 11172025 This direct identification and manipulation of GAD65 epitope recognition provides an approach toward dissection of the complex CD4(+) T cell response in IDDM.
1702 11192752 [Autoantibodies to GAD65, IA2 and insulin in Czech children with type 1 diabetes].
1703 11207247 CD4(+) T cells arise spontaneously in young NOD mice to an apparently dominant determinant found within the GAD65 peptide 530--543 (p530); however, T cells to the overlapping determinant 524-538 (p524) dominate the response only after immunization with GAD65(524--543).
1704 11207247 T cell clones and hybridomas from both of these T cell groups were responsive to APC pulsed with GAD65(524--543) or whole rGAD65. p524-reactive cells appeared to be regulatory upon adoptive transfer into young NOD mice and could inhibit insulin-dependent diabetes mellitus development, although they were unable to produce IL-4, IL-10, or TGF beta upon antigenic challenge.
1705 11207247 CD4(+) T cells arise spontaneously in young NOD mice to an apparently dominant determinant found within the GAD65 peptide 530--543 (p530); however, T cells to the overlapping determinant 524-538 (p524) dominate the response only after immunization with GAD65(524--543).
1706 11207247 T cell clones and hybridomas from both of these T cell groups were responsive to APC pulsed with GAD65(524--543) or whole rGAD65. p524-reactive cells appeared to be regulatory upon adoptive transfer into young NOD mice and could inhibit insulin-dependent diabetes mellitus development, although they were unable to produce IL-4, IL-10, or TGF beta upon antigenic challenge.
1707 11274421 We screened synthetic peptide libraries dedicated to bind to HLA-DR3, which predisposes to both diseases, using clonal CD4(+) T cells reactive to GAD65 isolated from a prediabetic stiff-man syndrome patient.
1708 11359854 Several studies have provided indirect evidence in support of a role for beta cell-specific Th2 cells in regulating insulin-dependent diabetes (IDDM).
1709 11359854 Adoptive transfer of a GAD65-specific Th2 cell clone (characterized by the secretion of IL-4, IL-5, and IL-10, but not IFN-gamma or TGF-beta) into 2- or 12-wk-old NOD female recipients prevented the progression of insulitis and subsequent development of overt IDDM.
1710 11359854 The immunoregulatory function of a given Th cell clone was dependent on the relative levels of IFN-gamma vs IL-4 and IL-10 secreted.
1711 11378213 We characterised a consecutive cohort of 132 youth onset diabetic individuals (age at onset<30 years, mean duration of disease 5.5+/-6.0 years) from North India, by serological determination of the determination of the islet cell autoantibodies, GAD(65) and IA2, and clinically for coexisting autoimmune thyroid disease, malnutrition and pancreatic calcification.
1712 11378213 A total of 22.4% of Type 1 and 30% of autoimmune polyglandular syndrome subjects showed both GAD(65) plus IA-2 autoantibody positivity, significantly more than the 4.7% positivity shown by the ketosis resistant type.
1713 11378213 However, GAD(65) antibody positivity alone was seen in 38% of ketosis resistant subjects which was significantly more than the 14.2 and 10% positivity seen in Type 1 and autoimmune polyglandular groups, respectively.
1714 11378213 The fibrocalculous pancreatopathy group showed GAD(65) plus IA-2 autoantibody positivity in 14.2% and GAD(65) autoantibody alone positivity in 7.1%. 26 and 60%, respectively, of the Type 1 and autoimmune polyglandular syndrome groups had thyroid microsomal autoantibody positivity.
1715 11378213 We characterised a consecutive cohort of 132 youth onset diabetic individuals (age at onset<30 years, mean duration of disease 5.5+/-6.0 years) from North India, by serological determination of the determination of the islet cell autoantibodies, GAD(65) and IA2, and clinically for coexisting autoimmune thyroid disease, malnutrition and pancreatic calcification.
1716 11378213 A total of 22.4% of Type 1 and 30% of autoimmune polyglandular syndrome subjects showed both GAD(65) plus IA-2 autoantibody positivity, significantly more than the 4.7% positivity shown by the ketosis resistant type.
1717 11378213 However, GAD(65) antibody positivity alone was seen in 38% of ketosis resistant subjects which was significantly more than the 14.2 and 10% positivity seen in Type 1 and autoimmune polyglandular groups, respectively.
1718 11378213 The fibrocalculous pancreatopathy group showed GAD(65) plus IA-2 autoantibody positivity in 14.2% and GAD(65) autoantibody alone positivity in 7.1%. 26 and 60%, respectively, of the Type 1 and autoimmune polyglandular syndrome groups had thyroid microsomal autoantibody positivity.
1719 11378213 We characterised a consecutive cohort of 132 youth onset diabetic individuals (age at onset<30 years, mean duration of disease 5.5+/-6.0 years) from North India, by serological determination of the determination of the islet cell autoantibodies, GAD(65) and IA2, and clinically for coexisting autoimmune thyroid disease, malnutrition and pancreatic calcification.
1720 11378213 A total of 22.4% of Type 1 and 30% of autoimmune polyglandular syndrome subjects showed both GAD(65) plus IA-2 autoantibody positivity, significantly more than the 4.7% positivity shown by the ketosis resistant type.
1721 11378213 However, GAD(65) antibody positivity alone was seen in 38% of ketosis resistant subjects which was significantly more than the 14.2 and 10% positivity seen in Type 1 and autoimmune polyglandular groups, respectively.
1722 11378213 The fibrocalculous pancreatopathy group showed GAD(65) plus IA-2 autoantibody positivity in 14.2% and GAD(65) autoantibody alone positivity in 7.1%. 26 and 60%, respectively, of the Type 1 and autoimmune polyglandular syndrome groups had thyroid microsomal autoantibody positivity.
1723 11378213 We characterised a consecutive cohort of 132 youth onset diabetic individuals (age at onset<30 years, mean duration of disease 5.5+/-6.0 years) from North India, by serological determination of the determination of the islet cell autoantibodies, GAD(65) and IA2, and clinically for coexisting autoimmune thyroid disease, malnutrition and pancreatic calcification.
1724 11378213 A total of 22.4% of Type 1 and 30% of autoimmune polyglandular syndrome subjects showed both GAD(65) plus IA-2 autoantibody positivity, significantly more than the 4.7% positivity shown by the ketosis resistant type.
1725 11378213 However, GAD(65) antibody positivity alone was seen in 38% of ketosis resistant subjects which was significantly more than the 14.2 and 10% positivity seen in Type 1 and autoimmune polyglandular groups, respectively.
1726 11378213 The fibrocalculous pancreatopathy group showed GAD(65) plus IA-2 autoantibody positivity in 14.2% and GAD(65) autoantibody alone positivity in 7.1%. 26 and 60%, respectively, of the Type 1 and autoimmune polyglandular syndrome groups had thyroid microsomal autoantibody positivity.
1727 11409713 Regions of homology exist between GAD65 (residues 250-273) and the Coxsackie P2-C protein (residues 28-50) and between GAD65 (residues 506-518) and proinsulin (residues 24-36), and each of these has been reported to be a diabetes-associated T cell target.
1728 11409713 These data suggest that proliferative T cell responses to peptides containing putative autoreactive epitopes of GAD65 and proinsulin are not specific for type 1 diabetes, that correlation between T cell reactivity to peptides is not restricted to those containing homologous regions, and that non-antigen-specific factors are important determinants of in vitro measurements of T cell reactivity.
1729 11409713 Regions of homology exist between GAD65 (residues 250-273) and the Coxsackie P2-C protein (residues 28-50) and between GAD65 (residues 506-518) and proinsulin (residues 24-36), and each of these has been reported to be a diabetes-associated T cell target.
1730 11409713 These data suggest that proliferative T cell responses to peptides containing putative autoreactive epitopes of GAD65 and proinsulin are not specific for type 1 diabetes, that correlation between T cell reactivity to peptides is not restricted to those containing homologous regions, and that non-antigen-specific factors are important determinants of in vitro measurements of T cell reactivity.
1731 11414702 Utilizing this library, we isolated a cross-reactive epitope recognized by a glutamic acid decarboxylase (GAD) 65-autoreactive T cell clone established from a patient with insulin-dependent diabetes mellitus.
1732 11414702 Although the newly identified epitope (PVQLSNQWHVVGATF) was far different from the original epitope, GAD65 p116-128 (NILLQYVVKSFDR), it did have the capacity to stimulate the T cell clone comparable to that of the original GAD epitope.
1733 11416235 Influence of sex and age at onset on autoantibodies against insulin, GAD65 and IA2 in recent onset type 1 diabetic patients.
1734 11418696 Initial studies indicated that exposure to glutamic acid decarboxylase (GAD65) peptides in utero resulted in delay or transient protection from insulin-dependent diabetes mellitus (IDDM) in NOD mice.
1735 11418696 To more closely examine the effects of early and late exposure to diabetogenic Ags on T cells, we applied peptides derived from GAD65 (GAD AA 246-266, 509-528, and 524-543), to our "in vitro IDDM" (ivIDDM) model.
1736 11418696 T cells derived from NOD FTOC primed during the latter stages of organ culture, when mature T cell phenotypes are present, had the ability to proliferate to GAD peptides. ivIDDM was exacerbated under these conditions, suggesting that GAD responsiveness correlates with the ivIDDM phenotype, and parallels the acceleration of IDDM we had seen in young adult NOD mice.
1737 11418696 Initial studies indicated that exposure to glutamic acid decarboxylase (GAD65) peptides in utero resulted in delay or transient protection from insulin-dependent diabetes mellitus (IDDM) in NOD mice.
1738 11418696 To more closely examine the effects of early and late exposure to diabetogenic Ags on T cells, we applied peptides derived from GAD65 (GAD AA 246-266, 509-528, and 524-543), to our "in vitro IDDM" (ivIDDM) model.
1739 11418696 T cells derived from NOD FTOC primed during the latter stages of organ culture, when mature T cell phenotypes are present, had the ability to proliferate to GAD peptides. ivIDDM was exacerbated under these conditions, suggesting that GAD responsiveness correlates with the ivIDDM phenotype, and parallels the acceleration of IDDM we had seen in young adult NOD mice.
1740 11418698 We previously demonstrated that administration of plasmid DNAs (pDNAs) encoding IL-4 and a fragment of glutamic acid decarboxylase 65 (GAD65) fused to IgGFc induces GAD65-specific Th2 cells and prevents insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice.
1741 11418698 Insulin was chosen based on studies demonstrating that administration of insulin or insulin B chain by a variety of strategies prevents IDDM in NOD mice.
1742 11418698 Surprisingly, young NOD mice receiving i.m. injections of pDNA encoding insulin B chain-IgGFc with or without IL-4 exhibited an accelerated progression of insulitis and developed early diabetes.
1743 11418698 Exacerbation of IDDM correlated with an increased frequency of IFN-gamma-secreting CD4(+) and CD8(+) T cells in response to insulin B chain-specific peptides compared with untreated mice.
1744 11418698 In contrast, treatment with pDNAs encoding insulin A chain-IgGFc and IL-4 elicited a low frequency of IL-4-secreting Th cells and had no effect on the progression of IDDM.
1745 11418698 Vaccination with pDNAs encoding GAD65-IgGFc and IL-4, however, prevented IDDM.
1746 11418698 These results demonstrate that insulin- and GAD65-specific T cell reactivity induced by pDNA vaccination has distinct effects on the progression of IDDM.
1747 11418698 We previously demonstrated that administration of plasmid DNAs (pDNAs) encoding IL-4 and a fragment of glutamic acid decarboxylase 65 (GAD65) fused to IgGFc induces GAD65-specific Th2 cells and prevents insulin-dependent diabetes mellitus (IDDM) in nonobese diabetic (NOD) mice.
1748 11418698 Insulin was chosen based on studies demonstrating that administration of insulin or insulin B chain by a variety of strategies prevents IDDM in NOD mice.
1749 11418698 Surprisingly, young NOD mice receiving i.m. injections of pDNA encoding insulin B chain-IgGFc with or without IL-4 exhibited an accelerated progression of insulitis and developed early diabetes.
1750 11418698 Exacerbation of IDDM correlated with an increased frequency of IFN-gamma-secreting CD4(+) and CD8(+) T cells in response to insulin B chain-specific peptides compared with untreated mice.
1751 11418698 In contrast, treatment with pDNAs encoding insulin A chain-IgGFc and IL-4 elicited a low frequency of IL-4-secreting Th cells and had no effect on the progression of IDDM.
1752 11418698 Vaccination with pDNAs encoding GAD65-IgGFc and IL-4, however, prevented IDDM.
1753 11418698 These results demonstrate that insulin- and GAD65-specific T cell reactivity induced by pDNA vaccination has distinct effects on the progression of IDDM.
1754 11466400 CD4(+) T cell responses to glutamic acid decarboxylase (GAD65) spontaneously arise in nonobese diabetic (NOD) mice before the onset of insulin-dependent diabetes mellitus (IDDM) and may be critical to the pathogenic process.
1755 11466400 However, since both CD4(+) and CD8(+) T cells are involved in autoimmune diabetes, we sought to determine whether GAD65-specific CD8(+) T cells were also present in prediabetic NOD mice and contribute to IDDM.
1756 11466400 Naive NOD spleen cells stimulated with GAD65 peptides 206-214 (p206) and 546-554 (p546) produced IFN-gamma and showed Ag-specific CTL responses against targets pulsed with homologous peptide.
1757 11466400 Spontaneous CTL responses to p206 and p546 were mediated by CD8(+) T cells that are capable of lysing GAD65-expressing target cells, and p546-specific T cells transferred insulitis to NOD.scid mice.
1758 11466400 This report reveals a potential therapeutic role for MHC class I-restricted peptides in treating autoimmune disease and revisits the notion that the CD4- and CD8-inducing determinants on some molecules may benefit from a proximal relationship.
1759 11466400 CD4(+) T cell responses to glutamic acid decarboxylase (GAD65) spontaneously arise in nonobese diabetic (NOD) mice before the onset of insulin-dependent diabetes mellitus (IDDM) and may be critical to the pathogenic process.
1760 11466400 However, since both CD4(+) and CD8(+) T cells are involved in autoimmune diabetes, we sought to determine whether GAD65-specific CD8(+) T cells were also present in prediabetic NOD mice and contribute to IDDM.
1761 11466400 Naive NOD spleen cells stimulated with GAD65 peptides 206-214 (p206) and 546-554 (p546) produced IFN-gamma and showed Ag-specific CTL responses against targets pulsed with homologous peptide.
1762 11466400 Spontaneous CTL responses to p206 and p546 were mediated by CD8(+) T cells that are capable of lysing GAD65-expressing target cells, and p546-specific T cells transferred insulitis to NOD.scid mice.
1763 11466400 This report reveals a potential therapeutic role for MHC class I-restricted peptides in treating autoimmune disease and revisits the notion that the CD4- and CD8-inducing determinants on some molecules may benefit from a proximal relationship.
1764 11466400 CD4(+) T cell responses to glutamic acid decarboxylase (GAD65) spontaneously arise in nonobese diabetic (NOD) mice before the onset of insulin-dependent diabetes mellitus (IDDM) and may be critical to the pathogenic process.
1765 11466400 However, since both CD4(+) and CD8(+) T cells are involved in autoimmune diabetes, we sought to determine whether GAD65-specific CD8(+) T cells were also present in prediabetic NOD mice and contribute to IDDM.
1766 11466400 Naive NOD spleen cells stimulated with GAD65 peptides 206-214 (p206) and 546-554 (p546) produced IFN-gamma and showed Ag-specific CTL responses against targets pulsed with homologous peptide.
1767 11466400 Spontaneous CTL responses to p206 and p546 were mediated by CD8(+) T cells that are capable of lysing GAD65-expressing target cells, and p546-specific T cells transferred insulitis to NOD.scid mice.
1768 11466400 This report reveals a potential therapeutic role for MHC class I-restricted peptides in treating autoimmune disease and revisits the notion that the CD4- and CD8-inducing determinants on some molecules may benefit from a proximal relationship.
1769 11466400 CD4(+) T cell responses to glutamic acid decarboxylase (GAD65) spontaneously arise in nonobese diabetic (NOD) mice before the onset of insulin-dependent diabetes mellitus (IDDM) and may be critical to the pathogenic process.
1770 11466400 However, since both CD4(+) and CD8(+) T cells are involved in autoimmune diabetes, we sought to determine whether GAD65-specific CD8(+) T cells were also present in prediabetic NOD mice and contribute to IDDM.
1771 11466400 Naive NOD spleen cells stimulated with GAD65 peptides 206-214 (p206) and 546-554 (p546) produced IFN-gamma and showed Ag-specific CTL responses against targets pulsed with homologous peptide.
1772 11466400 Spontaneous CTL responses to p206 and p546 were mediated by CD8(+) T cells that are capable of lysing GAD65-expressing target cells, and p546-specific T cells transferred insulitis to NOD.scid mice.
1773 11466400 This report reveals a potential therapeutic role for MHC class I-restricted peptides in treating autoimmune disease and revisits the notion that the CD4- and CD8-inducing determinants on some molecules may benefit from a proximal relationship.
1774 11473034 Characterization of preparations of GAD65, proinsulin, and the islet tyrosine phosphatase IA-2 for use in detection of autoreactive T-cells in type 1 diabetes: report of phase II of the Second International Immunology of Diabetes Society Workshop for Standardization of T-cell assays in type 1 diabetes.
1775 11473034 The identification, quantification, and characterization of T-cells reactive with the islet autoantigens GAD65, proinsulin (PI), and tyrosine phosphatase-like molecules IA-2 and phogrin are major research goals in type 1 diabetes.
1776 11473034 Through this process, we have been able to identify preparations of GAD65 and IA-2, generated in insect cells using the baculovirus expression system, that stimulate relevant clones and display low inhibitory effects on third-party antigens.
1777 11473034 Characterization of preparations of GAD65, proinsulin, and the islet tyrosine phosphatase IA-2 for use in detection of autoreactive T-cells in type 1 diabetes: report of phase II of the Second International Immunology of Diabetes Society Workshop for Standardization of T-cell assays in type 1 diabetes.
1778 11473034 The identification, quantification, and characterization of T-cells reactive with the islet autoantigens GAD65, proinsulin (PI), and tyrosine phosphatase-like molecules IA-2 and phogrin are major research goals in type 1 diabetes.
1779 11473034 Through this process, we have been able to identify preparations of GAD65 and IA-2, generated in insect cells using the baculovirus expression system, that stimulate relevant clones and display low inhibitory effects on third-party antigens.
1780 11473034 Characterization of preparations of GAD65, proinsulin, and the islet tyrosine phosphatase IA-2 for use in detection of autoreactive T-cells in type 1 diabetes: report of phase II of the Second International Immunology of Diabetes Society Workshop for Standardization of T-cell assays in type 1 diabetes.
1781 11473034 The identification, quantification, and characterization of T-cells reactive with the islet autoantigens GAD65, proinsulin (PI), and tyrosine phosphatase-like molecules IA-2 and phogrin are major research goals in type 1 diabetes.
1782 11473034 Through this process, we have been able to identify preparations of GAD65 and IA-2, generated in insect cells using the baculovirus expression system, that stimulate relevant clones and display low inhibitory effects on third-party antigens.
1783 11487177 To estimate the regional difference in the degree of association between these autoantibodies, autoantibodies reacting with ICA512/IA-2 (ICA512) and GAD65 in addition to ICA were analyzed in 131 Korean children with type 1 diabetes.
1784 11532327 Higher prevalence of GAD antibody in diabetes patients using a new radioligand-binding assay with recombinant human GAD65 antibodies (GAD65Ab) has been seen in several studies.
1785 11532327 There was no significant difference in gender, diabetes onset and duration, HbA1c, C-peptide concentration and frequencies of HLA DR3, DR4, DR9, DR3/DR4, DR3/DR9 and DR4/DR9 genotypes between GAD65Ab+ and GAD65Ab- groups.
1786 11532327 The frequencies of antimicrosomal and anti-thyroglobulin antibodies in GAD65Ab+ (13.5,8.1%, respectively) were not different from GAD65- patients (9.4,12.5%, respectively).
1787 11532327 Higher prevalence of GAD antibody in diabetes patients using a new radioligand-binding assay with recombinant human GAD65 antibodies (GAD65Ab) has been seen in several studies.
1788 11532327 There was no significant difference in gender, diabetes onset and duration, HbA1c, C-peptide concentration and frequencies of HLA DR3, DR4, DR9, DR3/DR4, DR3/DR9 and DR4/DR9 genotypes between GAD65Ab+ and GAD65Ab- groups.
1789 11532327 The frequencies of antimicrosomal and anti-thyroglobulin antibodies in GAD65Ab+ (13.5,8.1%, respectively) were not different from GAD65- patients (9.4,12.5%, respectively).
1790 11561476 To this end, 20 children (8 males, 12 females), ages 1-15 years, admitted to the University Pediatric Hospital with type 1 diabetes de novo between November 2000 and April 2001 were prospectively studied to determine the presence of serum antibodies against Islet cells (ICA), glutamic acid decarboxylase (GAD-65) and insulin autoantibodies (IAA).
1791 11585368 Autoantibodies to IA-2 and GAD65 in patients with type 2 diabetes mellitus of varied duration: prevalence and correlation with clinical features.
1792 11591120 In comparison with IRF-1(+/+), the percentage of CD4(+) and Mac-1(+) splenic cells significantly increased, whereas CD3(+), CD8(+) and B220(+) cells decreased in IRF-1(-/-).
1793 11591120 Furthermore, spleen cell proliferation in response to Con A or murine GAD65 peptide, a major autoantigen of the pancreatic beta-cell, significantly increased, and the IFN-gamma/IL-10 ratio in the culture supernatant significantly decreased in IRF-1(-/-), suggesting Th2 deviation in cytokine balance.
1794 11600569 Islet cell antibody (ICA), insulin autoantibody, glutamic acid decarboxylase (GAD(65)), and protein tyrosine phosphatase autoantibodies were measured and human leucocyte antigen (HLA) class II alleles DRB1 and DQB1 genotyping was performed.
1795 11600569 A subgroup of 26 probands (12 ICA+, 14 ICA-) was tested for GAD(65) and was found positive. 4/14 ICA+ first-degree relatives were GAD(65) positive.
1796 11600569 HLA-DRB1 was found to be associated with the presence of ICA in both probands and relatives, whereas HLA-DPB1 was associated with autoantibody in relatives of type 1 diabetic probands.
1797 11606180 Comparison of autoantibodies to IA-2 and GAD65 in the rapid- and the slow-onset, adult Type 1 diabetes in Thailand.
1798 11673498 Peripheral T cells reactive to the insulin, glutamic acid decarboxylase 65 (GAD65), GAD67, and islet cell Ag p69 autoantigens were also detected in these mice, indicating that NOD mice are not tolerant to any of these islet autoantigens at this young age.
1799 11681492 Balance of GAD65-specific IL-10 production and polyclonal Th1-type response in type 1 diabetes.
1800 11681492 In this study, higher glutamic acid decarboxylase 65 (GAD65)-specific IL-10 production was observed at 10-12 weeks in NOD mice, and a marked increase of Th1-type response (IFN-gamma production) upon polyclonal (anti-CD3 antibody) stimulation was observed just before diabetes development along with a decline of GAD65-specific IL-10 production.
1801 11681492 Moreover, there was a clear negative correlation between IL-10 level upon GAD65 stimulation and log(IFN-gamma) level upon anti-CD3 antibody stimulation (r=-0.999, p<0.001).
1802 11681492 These results suggest that the balance between GAD65-specific IL-10 production and polyclonal Th1-type response may regulate the onset of hyperglycemia in type 1 diabetes in NOD mice.
1803 11681492 Balance of GAD65-specific IL-10 production and polyclonal Th1-type response in type 1 diabetes.
1804 11681492 In this study, higher glutamic acid decarboxylase 65 (GAD65)-specific IL-10 production was observed at 10-12 weeks in NOD mice, and a marked increase of Th1-type response (IFN-gamma production) upon polyclonal (anti-CD3 antibody) stimulation was observed just before diabetes development along with a decline of GAD65-specific IL-10 production.
1805 11681492 Moreover, there was a clear negative correlation between IL-10 level upon GAD65 stimulation and log(IFN-gamma) level upon anti-CD3 antibody stimulation (r=-0.999, p<0.001).
1806 11681492 These results suggest that the balance between GAD65-specific IL-10 production and polyclonal Th1-type response may regulate the onset of hyperglycemia in type 1 diabetes in NOD mice.
1807 11681492 Balance of GAD65-specific IL-10 production and polyclonal Th1-type response in type 1 diabetes.
1808 11681492 In this study, higher glutamic acid decarboxylase 65 (GAD65)-specific IL-10 production was observed at 10-12 weeks in NOD mice, and a marked increase of Th1-type response (IFN-gamma production) upon polyclonal (anti-CD3 antibody) stimulation was observed just before diabetes development along with a decline of GAD65-specific IL-10 production.
1809 11681492 Moreover, there was a clear negative correlation between IL-10 level upon GAD65 stimulation and log(IFN-gamma) level upon anti-CD3 antibody stimulation (r=-0.999, p<0.001).
1810 11681492 These results suggest that the balance between GAD65-specific IL-10 production and polyclonal Th1-type response may regulate the onset of hyperglycemia in type 1 diabetes in NOD mice.
1811 11681492 Balance of GAD65-specific IL-10 production and polyclonal Th1-type response in type 1 diabetes.
1812 11681492 In this study, higher glutamic acid decarboxylase 65 (GAD65)-specific IL-10 production was observed at 10-12 weeks in NOD mice, and a marked increase of Th1-type response (IFN-gamma production) upon polyclonal (anti-CD3 antibody) stimulation was observed just before diabetes development along with a decline of GAD65-specific IL-10 production.
1813 11681492 Moreover, there was a clear negative correlation between IL-10 level upon GAD65 stimulation and log(IFN-gamma) level upon anti-CD3 antibody stimulation (r=-0.999, p<0.001).
1814 11681492 These results suggest that the balance between GAD65-specific IL-10 production and polyclonal Th1-type response may regulate the onset of hyperglycemia in type 1 diabetes in NOD mice.
1815 11681491 Recent studies have described linkage and association of type 1 diabetes to the cytotoxic T lymphocyte antigen-4 (CTLA-4) gene (IDDM12)in Caucasians.
1816 11681491 We also investigated association between this CTLA-4 gene polymorphism and GAD65 antibody positivity in 103 of the patients.
1817 11681491 There was no significant difference in the distribution of CTLA-4 alleles between patients and controls, and no difference was observed in the prevalence of CTLA-4 alleles when GAD65 antibody-positive and -negative individuals with the type 1 diabetes were compared.
1818 11681491 Recent studies have described linkage and association of type 1 diabetes to the cytotoxic T lymphocyte antigen-4 (CTLA-4) gene (IDDM12)in Caucasians.
1819 11681491 We also investigated association between this CTLA-4 gene polymorphism and GAD65 antibody positivity in 103 of the patients.
1820 11681491 There was no significant difference in the distribution of CTLA-4 alleles between patients and controls, and no difference was observed in the prevalence of CTLA-4 alleles when GAD65 antibody-positive and -negative individuals with the type 1 diabetes were compared.
1821 11822582 The criteria for type 2 DM were absent islet cell (IA-2) and glutamic acid decarboxylase (GAD65) antibodies and a fasting serum C-peptide level of > or = 0.23 nmol/l.
1822 11879720 GAD65 and IA-2 autoantibodies are common in a subset of siblings of Sardinian Type 2 diabetes families.
1823 11905849 Complexity of human immune response profiles for CD4+ T cell epitopes from the diabetes autoantigen GAD65.
1824 11905849 We have investigated recognition of the GAD65 protein, one of the well-characterized autoantigens in type I diabetes, among individuals carrying the HLA-DR4 haplotypes characteristic of susceptibility to IDDM.
1825 11905849 The majority of T cell responses were restricted by DRB1 molecules; however, DRB4 restricted responses were also observed.
1826 11905849 Complexity of human immune response profiles for CD4+ T cell epitopes from the diabetes autoantigen GAD65.
1827 11905849 We have investigated recognition of the GAD65 protein, one of the well-characterized autoantigens in type I diabetes, among individuals carrying the HLA-DR4 haplotypes characteristic of susceptibility to IDDM.
1828 11905849 The majority of T cell responses were restricted by DRB1 molecules; however, DRB4 restricted responses were also observed.
1829 11927616 We found that in patients with new-onset type 1 diabetes, GAD65-reactive T cells were strikingly less dependent on CD28 and B7-1 costimulation to enter into cell cycle and proliferate than were equivalent cells derived from healthy controls.
1830 11927616 In addition, we observed different effects with selective blockade of either B7-1 or B7-2 molecules; B7-1 appears to deliver a negative signal by engaging CTLA-4, while B7-2 engagement of CD28 upregulates T cell proliferation and cytokine secretion.
1831 11978629 Age-dependent associations between type 1 diabetes risk genes HLA, INS VNTR, and CTLA-4 and autoantibodies to GAD65 (GADAs), ICA512/IA-2, insulin, and islet cells were determined by logistic regression analysis in 971 incident patients with type 1 diabetes and 702 control subjects aged 0-34 years.
1832 12021093 Antibodies (Abs) to tyrosine pyrophosphatase (IA2-Abs), glutamate decarboxylase 65 (GAD65-Abs), and other minor markers like ICA12 Abs and tissue transglutaminase Abs (TTG-Abs) were studied.
1833 12021093 Of the MMDM patients 30% were positive for either GAD65 or IA-2 antibodies, and 14% were positive for ICA12 antibodies.
1834 12021103 A human-derived monoclonal antibody (mAb) MICA3 reacts with a surface loop of GAD65 that includes PEVKEK, and mutagenic deletion of this loop was shown to reduce reactivity of GAD with the mAb by 70%.
1835 12021103 To establish that the PEVKEK motif on GAD65 contains a major epitope for diabetes sera and to identify the amino acids involved, mutants of nucleotides of GAD65 and GAD67 at sites in the PEVKEK motif were created and the expressed proteins used for radioimmunoprecipitation (RIP) tests with sera from patients with type 1 diabetes.
1836 12021103 A human-derived monoclonal antibody (mAb) MICA3 reacts with a surface loop of GAD65 that includes PEVKEK, and mutagenic deletion of this loop was shown to reduce reactivity of GAD with the mAb by 70%.
1837 12021103 To establish that the PEVKEK motif on GAD65 contains a major epitope for diabetes sera and to identify the amino acids involved, mutants of nucleotides of GAD65 and GAD67 at sites in the PEVKEK motif were created and the expressed proteins used for radioimmunoprecipitation (RIP) tests with sera from patients with type 1 diabetes.
1838 12021109 This study attempts to assess the prevalence of various autoantibodies in early-onset diabetics in northern India, with emphasis on antibodies against glutamic acid decarboxylase (GAD65), IA-2, ICA-12, 21-hydroxylase (21-OH), and tissue transglutaminase (TTG).
1839 12021109 GAD65 and IA-2 antibodies were found to be present in approximately 26% of cases of type 1 diabetes.
1840 12021109 This study attempts to assess the prevalence of various autoantibodies in early-onset diabetics in northern India, with emphasis on antibodies against glutamic acid decarboxylase (GAD65), IA-2, ICA-12, 21-hydroxylase (21-OH), and tissue transglutaminase (TTG).
1841 12021109 GAD65 and IA-2 antibodies were found to be present in approximately 26% of cases of type 1 diabetes.
1842 12021112 We examined the frequencies of autoantibodies to glutamate decarboxylase, GAD65, protein tyrosine phosphatase, IA-2/ICA512, and insulin, and of HLA class II markers in ICA-positive first-degree relatives of patients with type 1 diabetes.
1843 12021116 GAD65 and ICA512 antibodies in undernourished and normally nourished south Indian patients with diabetes.
1844 12021116 The frequency of GAD65 and ICA512 antibodies in Indian IDDM patients is similar to that in Caucasians.
1845 12021116 The prevalence of GAD65 and ICA512 autoantibodies in controls from south India was 4% and 2%, respectively.
1846 12021116 One hundred thirty-one diabetic patients (undernourished [UNDM], n = 67; and normal nourished [NNDM], n = 64) were assayed for GAD65 and ICA512 autoantibodies.
1847 12021116 The results suggest that GAD65 and ICA512 antibody frequencies are neither significantly increased nor decreased in UNDM patients compared to NNDM patients.
1848 12021116 GAD65 and ICA512 antibodies in undernourished and normally nourished south Indian patients with diabetes.
1849 12021116 The frequency of GAD65 and ICA512 antibodies in Indian IDDM patients is similar to that in Caucasians.
1850 12021116 The prevalence of GAD65 and ICA512 autoantibodies in controls from south India was 4% and 2%, respectively.
1851 12021116 One hundred thirty-one diabetic patients (undernourished [UNDM], n = 67; and normal nourished [NNDM], n = 64) were assayed for GAD65 and ICA512 autoantibodies.
1852 12021116 The results suggest that GAD65 and ICA512 antibody frequencies are neither significantly increased nor decreased in UNDM patients compared to NNDM patients.
1853 12021116 GAD65 and ICA512 antibodies in undernourished and normally nourished south Indian patients with diabetes.
1854 12021116 The frequency of GAD65 and ICA512 antibodies in Indian IDDM patients is similar to that in Caucasians.
1855 12021116 The prevalence of GAD65 and ICA512 autoantibodies in controls from south India was 4% and 2%, respectively.
1856 12021116 One hundred thirty-one diabetic patients (undernourished [UNDM], n = 67; and normal nourished [NNDM], n = 64) were assayed for GAD65 and ICA512 autoantibodies.
1857 12021116 The results suggest that GAD65 and ICA512 antibody frequencies are neither significantly increased nor decreased in UNDM patients compared to NNDM patients.
1858 12021116 GAD65 and ICA512 antibodies in undernourished and normally nourished south Indian patients with diabetes.
1859 12021116 The frequency of GAD65 and ICA512 antibodies in Indian IDDM patients is similar to that in Caucasians.
1860 12021116 The prevalence of GAD65 and ICA512 autoantibodies in controls from south India was 4% and 2%, respectively.
1861 12021116 One hundred thirty-one diabetic patients (undernourished [UNDM], n = 67; and normal nourished [NNDM], n = 64) were assayed for GAD65 and ICA512 autoantibodies.
1862 12021116 The results suggest that GAD65 and ICA512 antibody frequencies are neither significantly increased nor decreased in UNDM patients compared to NNDM patients.
1863 12021116 GAD65 and ICA512 antibodies in undernourished and normally nourished south Indian patients with diabetes.
1864 12021116 The frequency of GAD65 and ICA512 antibodies in Indian IDDM patients is similar to that in Caucasians.
1865 12021116 The prevalence of GAD65 and ICA512 autoantibodies in controls from south India was 4% and 2%, respectively.
1866 12021116 One hundred thirty-one diabetic patients (undernourished [UNDM], n = 67; and normal nourished [NNDM], n = 64) were assayed for GAD65 and ICA512 autoantibodies.
1867 12021116 The results suggest that GAD65 and ICA512 antibody frequencies are neither significantly increased nor decreased in UNDM patients compared to NNDM patients.
1868 12021119 Autoantibodies against glutamic acid decarboxylase (GAD65) and protein tyrosine phosphatase (IA-2) among patients with clinically diagnosed NIDDM identify group of patients with slow-onset type 1 diabetes or LADA.
1869 12021119 One hundred NIDDM patients and 100 healthy controls were tested for GAD65 and IA-2 autoantibodies as well as 21-hydroxylase (21-OH) and tissue transglutaminase (TTG) antibodies by RIA assay.
1870 12021119 GAD65 antibodies were found in 30 of 100 (30%) and IA-2 antibodies in 40 of 100 (40%) patients.
1871 12021119 Either GAD65 or IA-2 antibodies were found in 55 of 100 (55%).
1872 12021119 Autoantibodies against glutamic acid decarboxylase (GAD65) and protein tyrosine phosphatase (IA-2) among patients with clinically diagnosed NIDDM identify group of patients with slow-onset type 1 diabetes or LADA.
1873 12021119 One hundred NIDDM patients and 100 healthy controls were tested for GAD65 and IA-2 autoantibodies as well as 21-hydroxylase (21-OH) and tissue transglutaminase (TTG) antibodies by RIA assay.
1874 12021119 GAD65 antibodies were found in 30 of 100 (30%) and IA-2 antibodies in 40 of 100 (40%) patients.
1875 12021119 Either GAD65 or IA-2 antibodies were found in 55 of 100 (55%).
1876 12021119 Autoantibodies against glutamic acid decarboxylase (GAD65) and protein tyrosine phosphatase (IA-2) among patients with clinically diagnosed NIDDM identify group of patients with slow-onset type 1 diabetes or LADA.
1877 12021119 One hundred NIDDM patients and 100 healthy controls were tested for GAD65 and IA-2 autoantibodies as well as 21-hydroxylase (21-OH) and tissue transglutaminase (TTG) antibodies by RIA assay.
1878 12021119 GAD65 antibodies were found in 30 of 100 (30%) and IA-2 antibodies in 40 of 100 (40%) patients.
1879 12021119 Either GAD65 or IA-2 antibodies were found in 55 of 100 (55%).
1880 12021119 Autoantibodies against glutamic acid decarboxylase (GAD65) and protein tyrosine phosphatase (IA-2) among patients with clinically diagnosed NIDDM identify group of patients with slow-onset type 1 diabetes or LADA.
1881 12021119 One hundred NIDDM patients and 100 healthy controls were tested for GAD65 and IA-2 autoantibodies as well as 21-hydroxylase (21-OH) and tissue transglutaminase (TTG) antibodies by RIA assay.
1882 12021119 GAD65 antibodies were found in 30 of 100 (30%) and IA-2 antibodies in 40 of 100 (40%) patients.
1883 12021119 Either GAD65 or IA-2 antibodies were found in 55 of 100 (55%).
1884 12021124 Autoantibodies against glutamic acid decarboxylase (GAD65) and tyrosine phosphatase (IA-2) are strongly associated with autoimmune diabetes and can be useful in early identification of the development of type 1 diabetes in women with GDM.
1885 12021124 The aim of our study was to estimate the prevalence of autoantibodies against minor antigens-tissue transglutaminase (TTG), ICA12, and 21-hydroxylase (21-0H)-in GDM patients from southern India.
1886 12021124 Eighty-six serum samples from GDM subjects and 114 samples from healthy controls were tested for the presence of GAD65 and IA-2Ab as well as for the presence of 21-OH, TTG, and ICA12Ab by radiobinding assay with in vitro translated recombinant human 35S-GAD65, IA-2, TTG, ICA12, and 21-OH antigens.
1887 12021124 We observed the presence of GAD65 or IA-2 autoantibodies in 41% (35/86) of GDM patients, while none of the patients tested positive for any of the minor autoantibodies.
1888 12021124 Autoantibodies against glutamic acid decarboxylase (GAD65) and tyrosine phosphatase (IA-2) are strongly associated with autoimmune diabetes and can be useful in early identification of the development of type 1 diabetes in women with GDM.
1889 12021124 The aim of our study was to estimate the prevalence of autoantibodies against minor antigens-tissue transglutaminase (TTG), ICA12, and 21-hydroxylase (21-0H)-in GDM patients from southern India.
1890 12021124 Eighty-six serum samples from GDM subjects and 114 samples from healthy controls were tested for the presence of GAD65 and IA-2Ab as well as for the presence of 21-OH, TTG, and ICA12Ab by radiobinding assay with in vitro translated recombinant human 35S-GAD65, IA-2, TTG, ICA12, and 21-OH antigens.
1891 12021124 We observed the presence of GAD65 or IA-2 autoantibodies in 41% (35/86) of GDM patients, while none of the patients tested positive for any of the minor autoantibodies.
1892 12021124 Autoantibodies against glutamic acid decarboxylase (GAD65) and tyrosine phosphatase (IA-2) are strongly associated with autoimmune diabetes and can be useful in early identification of the development of type 1 diabetes in women with GDM.
1893 12021124 The aim of our study was to estimate the prevalence of autoantibodies against minor antigens-tissue transglutaminase (TTG), ICA12, and 21-hydroxylase (21-0H)-in GDM patients from southern India.
1894 12021124 Eighty-six serum samples from GDM subjects and 114 samples from healthy controls were tested for the presence of GAD65 and IA-2Ab as well as for the presence of 21-OH, TTG, and ICA12Ab by radiobinding assay with in vitro translated recombinant human 35S-GAD65, IA-2, TTG, ICA12, and 21-OH antigens.
1895 12021124 We observed the presence of GAD65 or IA-2 autoantibodies in 41% (35/86) of GDM patients, while none of the patients tested positive for any of the minor autoantibodies.
1896 12021125 Autoantibodies against major antigens GAD65 and IA-2 as well as some minor antibodies are markers for autoimmune diabetes already several years before clinical onset in most populations.
1897 12021125 The aim of our study was to detect the presence of glutamic acid decarboxylase (GAD65), tyrosine phosphates (IA-2) and tissue transglutaminase (TTG) antibodies.
1898 12021125 Autoantibodies against major antigens GAD65 and IA-2 as well as some minor antibodies are markers for autoimmune diabetes already several years before clinical onset in most populations.
1899 12021125 The aim of our study was to detect the presence of glutamic acid decarboxylase (GAD65), tyrosine phosphates (IA-2) and tissue transglutaminase (TTG) antibodies.
1900 12021126 Autoantibodies against GAD65 (glutamic acid decarboxylase) and IA-2 (tyrosine phosphatase) in cord blood were determined in 2,518 randomly selected children.
1901 12021126 Forty-nine (1.95%) were positive for GAD65 antibodies, 14 (0.56%) were positive for IA-2 antibodies, and 3 of them were positive for both GAD and IA-2.
1902 12021126 Four of the mothers of children with GAD65 autoantibodies in cord blood (8.2%) had type 1 diabetes as did 5 mothers of children with IA-2 antibodies (35.7 %), but only 0.4% of the mothers had type 1 diabetes in the autoantibody-negative group (P < 0.001).
1903 12021126 At one year follow-up nobody of those with positive cord blood had GAD65 or IA-2 autoantibodies.
1904 12021126 Autoantibodies against GAD65 (glutamic acid decarboxylase) and IA-2 (tyrosine phosphatase) in cord blood were determined in 2,518 randomly selected children.
1905 12021126 Forty-nine (1.95%) were positive for GAD65 antibodies, 14 (0.56%) were positive for IA-2 antibodies, and 3 of them were positive for both GAD and IA-2.
1906 12021126 Four of the mothers of children with GAD65 autoantibodies in cord blood (8.2%) had type 1 diabetes as did 5 mothers of children with IA-2 antibodies (35.7 %), but only 0.4% of the mothers had type 1 diabetes in the autoantibody-negative group (P < 0.001).
1907 12021126 At one year follow-up nobody of those with positive cord blood had GAD65 or IA-2 autoantibodies.
1908 12021126 Autoantibodies against GAD65 (glutamic acid decarboxylase) and IA-2 (tyrosine phosphatase) in cord blood were determined in 2,518 randomly selected children.
1909 12021126 Forty-nine (1.95%) were positive for GAD65 antibodies, 14 (0.56%) were positive for IA-2 antibodies, and 3 of them were positive for both GAD and IA-2.
1910 12021126 Four of the mothers of children with GAD65 autoantibodies in cord blood (8.2%) had type 1 diabetes as did 5 mothers of children with IA-2 antibodies (35.7 %), but only 0.4% of the mothers had type 1 diabetes in the autoantibody-negative group (P < 0.001).
1911 12021126 At one year follow-up nobody of those with positive cord blood had GAD65 or IA-2 autoantibodies.
1912 12021126 Autoantibodies against GAD65 (glutamic acid decarboxylase) and IA-2 (tyrosine phosphatase) in cord blood were determined in 2,518 randomly selected children.
1913 12021126 Forty-nine (1.95%) were positive for GAD65 antibodies, 14 (0.56%) were positive for IA-2 antibodies, and 3 of them were positive for both GAD and IA-2.
1914 12021126 Four of the mothers of children with GAD65 autoantibodies in cord blood (8.2%) had type 1 diabetes as did 5 mothers of children with IA-2 antibodies (35.7 %), but only 0.4% of the mothers had type 1 diabetes in the autoantibody-negative group (P < 0.001).
1915 12021126 At one year follow-up nobody of those with positive cord blood had GAD65 or IA-2 autoantibodies.
1916 12021127 BCG vaccination and GAD65 and IA-2 autoantibodies in autoimmune diabetes in southern India.
1917 12021127 This paper reports a study to determine whether BCG vaccination is associated with an increase or decrease in GAD65 and I-A2 autoantibodies in cases of IDDM and NIDDM in southern India.
1918 12021127 BCG vaccination and GAD65 and IA-2 autoantibodies in autoimmune diabetes in southern India.
1919 12021127 This paper reports a study to determine whether BCG vaccination is associated with an increase or decrease in GAD65 and I-A2 autoantibodies in cases of IDDM and NIDDM in southern India.
1920 12021128 Antibodies to GAD65 and IA-2 are the major immunological markers in autoimmune diabetes.
1921 12021128 We studied 88 IDDM patients and 100 NIDDM patients as well as controls for the prevalence of GAD65, IA-2, and ICA12 antibodies by radioligand binding assay (RIA) using (35)S-labeled islet antigens.
1922 12021135 Associations of HLA-DR3/DQ2 with GAD65 and DR4 with IA-2 antibodies in insulin-dependent diabetes mellitus (IDDM) and DR3/DQ2 with GAD65 antibodies in latent autoimmune diabetes in adult (LADA) patients are known.
1923 12021135 The aim of the present study was to look for association of HLA DR and DQ with GAD65, IA2 and ICA12 antibodies in IDDM (n = 97), LADA (n = 32), and malnutrition-modulated diabetes mellitus (MMDM) (n = 22) patients from northern India.
1924 12021135 Antibodies to GAD65, IA-2, and ICA-12 were assayed by radioimmunoassay using (35)S-labeled recombinant human GAD65, IA2, and ICA12 using the in vitro transcription-translation method.
1925 12021135 We found DR3 (29% vs. 11%) and DQ2 (36% vs. 14%) were increased in GAD65 antibody-positive compared to GAD65 antibody-negative IDDM patients (P > 0.05).
1926 12021135 ICA 12 antibodies were increased in either DR3 or DR4 (84% vs. 69%) positives compared to non-DR3/DR4 IDDM patients (P > 0.05).
1927 12021135 However in LADA patients, ICA12 was increased in non-DR3/DR4 patients compared to DR3- or DR4-positive patients (P < 0.05).
1928 12021135 Associations of HLA-DR3/DQ2 with GAD65 and DR4 with IA-2 antibodies in insulin-dependent diabetes mellitus (IDDM) and DR3/DQ2 with GAD65 antibodies in latent autoimmune diabetes in adult (LADA) patients are known.
1929 12021135 The aim of the present study was to look for association of HLA DR and DQ with GAD65, IA2 and ICA12 antibodies in IDDM (n = 97), LADA (n = 32), and malnutrition-modulated diabetes mellitus (MMDM) (n = 22) patients from northern India.
1930 12021135 Antibodies to GAD65, IA-2, and ICA-12 were assayed by radioimmunoassay using (35)S-labeled recombinant human GAD65, IA2, and ICA12 using the in vitro transcription-translation method.
1931 12021135 We found DR3 (29% vs. 11%) and DQ2 (36% vs. 14%) were increased in GAD65 antibody-positive compared to GAD65 antibody-negative IDDM patients (P > 0.05).
1932 12021135 ICA 12 antibodies were increased in either DR3 or DR4 (84% vs. 69%) positives compared to non-DR3/DR4 IDDM patients (P > 0.05).
1933 12021135 However in LADA patients, ICA12 was increased in non-DR3/DR4 patients compared to DR3- or DR4-positive patients (P < 0.05).
1934 12021135 Associations of HLA-DR3/DQ2 with GAD65 and DR4 with IA-2 antibodies in insulin-dependent diabetes mellitus (IDDM) and DR3/DQ2 with GAD65 antibodies in latent autoimmune diabetes in adult (LADA) patients are known.
1935 12021135 The aim of the present study was to look for association of HLA DR and DQ with GAD65, IA2 and ICA12 antibodies in IDDM (n = 97), LADA (n = 32), and malnutrition-modulated diabetes mellitus (MMDM) (n = 22) patients from northern India.
1936 12021135 Antibodies to GAD65, IA-2, and ICA-12 were assayed by radioimmunoassay using (35)S-labeled recombinant human GAD65, IA2, and ICA12 using the in vitro transcription-translation method.
1937 12021135 We found DR3 (29% vs. 11%) and DQ2 (36% vs. 14%) were increased in GAD65 antibody-positive compared to GAD65 antibody-negative IDDM patients (P > 0.05).
1938 12021135 ICA 12 antibodies were increased in either DR3 or DR4 (84% vs. 69%) positives compared to non-DR3/DR4 IDDM patients (P > 0.05).
1939 12021135 However in LADA patients, ICA12 was increased in non-DR3/DR4 patients compared to DR3- or DR4-positive patients (P < 0.05).
1940 12021135 Associations of HLA-DR3/DQ2 with GAD65 and DR4 with IA-2 antibodies in insulin-dependent diabetes mellitus (IDDM) and DR3/DQ2 with GAD65 antibodies in latent autoimmune diabetes in adult (LADA) patients are known.
1941 12021135 The aim of the present study was to look for association of HLA DR and DQ with GAD65, IA2 and ICA12 antibodies in IDDM (n = 97), LADA (n = 32), and malnutrition-modulated diabetes mellitus (MMDM) (n = 22) patients from northern India.
1942 12021135 Antibodies to GAD65, IA-2, and ICA-12 were assayed by radioimmunoassay using (35)S-labeled recombinant human GAD65, IA2, and ICA12 using the in vitro transcription-translation method.
1943 12021135 We found DR3 (29% vs. 11%) and DQ2 (36% vs. 14%) were increased in GAD65 antibody-positive compared to GAD65 antibody-negative IDDM patients (P > 0.05).
1944 12021135 ICA 12 antibodies were increased in either DR3 or DR4 (84% vs. 69%) positives compared to non-DR3/DR4 IDDM patients (P > 0.05).
1945 12021135 However in LADA patients, ICA12 was increased in non-DR3/DR4 patients compared to DR3- or DR4-positive patients (P < 0.05).
1946 12021138 MHC class I chain-related gene a alleles distinguish malnutrition-modulated diabetes, insulin-dependent diabetes, and non-insulin- dependent diabetes mellitus patients from eastern India.
1947 12021138 Insulin-dependent diabetes mellitus (IDDM) is a polygenic disorder with an autoimmune basis for disease development.
1948 12021138 In addition to HLA, a second susceptibility locus for IDDM has been identified to lie in the major histocompatibility class III region.
1949 12021138 MIC-A is located in the MHC class III region and is expressed by monocytes, keratinocytes, and endothelial cells.
1950 12021138 The aim of our study was to find the association of MIC-A alleles with IDDM, malnutrition-modulated diabetes mellitus (MMDM), and non-insulin-dependent diabetes mellitus (NIDDM) patients.
1951 12021138 Of the 212 NIDDM patients analyzed, 96 of them were found to be positive for either GAD65 or IA-2 antibodies.
1952 12021138 Autoantibodies to GAD65 and IA-2 were measured by radioligand binding assay using (35)S-labeled recombinant human GAD65 and IA-2 in an in vitro transcription/translation system.
1953 12021138 MIC-A alleles distinguish acute-onset IDDM from slow-onset IDDM, indicating that this molecule may be important for delaying the onset of IDDM with the result that these patients are diagnosed clinically as NIDDM.
1954 12021138 MHC class I chain-related gene a alleles distinguish malnutrition-modulated diabetes, insulin-dependent diabetes, and non-insulin- dependent diabetes mellitus patients from eastern India.
1955 12021138 Insulin-dependent diabetes mellitus (IDDM) is a polygenic disorder with an autoimmune basis for disease development.
1956 12021138 In addition to HLA, a second susceptibility locus for IDDM has been identified to lie in the major histocompatibility class III region.
1957 12021138 MIC-A is located in the MHC class III region and is expressed by monocytes, keratinocytes, and endothelial cells.
1958 12021138 The aim of our study was to find the association of MIC-A alleles with IDDM, malnutrition-modulated diabetes mellitus (MMDM), and non-insulin-dependent diabetes mellitus (NIDDM) patients.
1959 12021138 Of the 212 NIDDM patients analyzed, 96 of them were found to be positive for either GAD65 or IA-2 antibodies.
1960 12021138 Autoantibodies to GAD65 and IA-2 were measured by radioligand binding assay using (35)S-labeled recombinant human GAD65 and IA-2 in an in vitro transcription/translation system.
1961 12021138 MIC-A alleles distinguish acute-onset IDDM from slow-onset IDDM, indicating that this molecule may be important for delaying the onset of IDDM with the result that these patients are diagnosed clinically as NIDDM.
1962 12021141 From our previous studies, we have shown that microsatellite allele A5 of MICA is associated with IDDM.
1963 12021141 Out of 100 clinically diagnosed NIDDM patients, 49 tested positive for GAD65 and IA-2 antibodies by use of 35S RIA.
1964 12021141 Our results show that MICA allele A5.1 is significantly increased in antibody-positive (GAD65 or IA-2) NIDDM patients [35/49 (72%)] when compared to healthy controls [22/96 (23%)] (OR = 8.4; P < 0.0001).
1965 12021141 From our previous studies, we have shown that microsatellite allele A5 of MICA is associated with IDDM.
1966 12021141 Out of 100 clinically diagnosed NIDDM patients, 49 tested positive for GAD65 and IA-2 antibodies by use of 35S RIA.
1967 12021141 Our results show that MICA allele A5.1 is significantly increased in antibody-positive (GAD65 or IA-2) NIDDM patients [35/49 (72%)] when compared to healthy controls [22/96 (23%)] (OR = 8.4; P < 0.0001).
1968 12073931 Tyrosine phosphatase-like protein (IA-2) and glutamic acid decarboxylase (GAD65) autoantibodies: a study of Chinese patients with diabetes mellitus.
1969 12092457 Multiple international workshops fostered the development of specific and sensitive radioassays for autoantibodies reacting with GAD65 (glutamic acid decarboxylase), ICA512 (also termed IA-2, a tyrosine phosphatase-like protein), and insulin.
1970 12150938 PDX-1 mediates glucose responsiveness of GAD(67), but not GAD(65), gene transcription in islets of Langerhans.
1971 12150938 Glucose-regulated transcription of the insulin gene is in part mediated via the homeobox transcription factor PDX-1.
1972 12150938 We have studied the mRNA level of two isoforms of GAD, GAD(65) and GAD(67), and found that GAD(67) but not GAD(65) mRNA steady-state level is regulated by glucose.
1973 12150938 We show that PDX-1 is able to bind to two TAAT-boxes in the GAD(67) promoter and that functional disruption of these two PDX-1 binding elements has an additive effect in severely impairing glucose responsiveness of the GAD(67) promoter.
1974 12150938 These data strongly suggest that PDX-1 is involved in glucose-regulated expression of GAD(67).
1975 12186840 CD4(+) T cells from glutamic acid decarboxylase (GAD)65-specific T cell receptor transgenic mice are not diabetogenic and can delay diabetes transfer.
1976 12186840 These mice have GAD65-specific CD4(+) T cells, as shown by staining with an I-A(g7)(p286) tetramer reagent.
1977 12186840 Lymphocytes from these TCR transgenic mice proliferate and make interferon gamma, interleukin (IL)-2, tumor necrosis factor (TNF)-alpha, and IL-10 when stimulated in vitro with GAD65 peptide 286-300, yet these TCR transgenic animals do not spontaneously develop diabetes, and insulitis is virtually undetectable.
1978 12186840 Furthermore, in vitro activated CD4 T cells from GAD 286 TCR transgenic mice express higher levels of CTL-associated antigen (CTLA)-4 than nontransgenic littermates.
1979 12186840 CD4(+) T cells, or p286-tetramer(+)CD4(+) Tcells, from GAD65 286-300-specific TCR transgenic mice delay diabetes induced in NOD.scid mice by diabetic NOD spleen cells.
1980 12186840 CD4(+) T cells from glutamic acid decarboxylase (GAD)65-specific T cell receptor transgenic mice are not diabetogenic and can delay diabetes transfer.
1981 12186840 These mice have GAD65-specific CD4(+) T cells, as shown by staining with an I-A(g7)(p286) tetramer reagent.
1982 12186840 Lymphocytes from these TCR transgenic mice proliferate and make interferon gamma, interleukin (IL)-2, tumor necrosis factor (TNF)-alpha, and IL-10 when stimulated in vitro with GAD65 peptide 286-300, yet these TCR transgenic animals do not spontaneously develop diabetes, and insulitis is virtually undetectable.
1983 12186840 Furthermore, in vitro activated CD4 T cells from GAD 286 TCR transgenic mice express higher levels of CTL-associated antigen (CTLA)-4 than nontransgenic littermates.
1984 12186840 CD4(+) T cells, or p286-tetramer(+)CD4(+) Tcells, from GAD65 286-300-specific TCR transgenic mice delay diabetes induced in NOD.scid mice by diabetic NOD spleen cells.
1985 12186840 CD4(+) T cells from glutamic acid decarboxylase (GAD)65-specific T cell receptor transgenic mice are not diabetogenic and can delay diabetes transfer.
1986 12186840 These mice have GAD65-specific CD4(+) T cells, as shown by staining with an I-A(g7)(p286) tetramer reagent.
1987 12186840 Lymphocytes from these TCR transgenic mice proliferate and make interferon gamma, interleukin (IL)-2, tumor necrosis factor (TNF)-alpha, and IL-10 when stimulated in vitro with GAD65 peptide 286-300, yet these TCR transgenic animals do not spontaneously develop diabetes, and insulitis is virtually undetectable.
1988 12186840 Furthermore, in vitro activated CD4 T cells from GAD 286 TCR transgenic mice express higher levels of CTL-associated antigen (CTLA)-4 than nontransgenic littermates.
1989 12186840 CD4(+) T cells, or p286-tetramer(+)CD4(+) Tcells, from GAD65 286-300-specific TCR transgenic mice delay diabetes induced in NOD.scid mice by diabetic NOD spleen cells.
1990 12197888 Several studies suggest that GAD-Abs may play a critical role in the pathogenesis of SMS and CAPA but little is known about T-cell responsiveness to GAD-65 in these neurological diseases.
1991 12197888 To analyse cell-mediated responses to GAD, we studied the peripheral blood lymphocyte proliferation and cytokine responses to recombinant human GAD-65 in 5 patients with SMS, 6 with CAPA, 9 with DM1, 8 with APS and 15 control subjects.
1992 12197888 These results suggest that, despite similar humoral autoreactivity, cellular responses to GAD are different between SMS and CAPA, with a greater inflammatory response in CAPA, and this difference may be relevant to the pathogenesis of these diseases.
1993 12197888 Several studies suggest that GAD-Abs may play a critical role in the pathogenesis of SMS and CAPA but little is known about T-cell responsiveness to GAD-65 in these neurological diseases.
1994 12197888 To analyse cell-mediated responses to GAD, we studied the peripheral blood lymphocyte proliferation and cytokine responses to recombinant human GAD-65 in 5 patients with SMS, 6 with CAPA, 9 with DM1, 8 with APS and 15 control subjects.
1995 12197888 These results suggest that, despite similar humoral autoreactivity, cellular responses to GAD are different between SMS and CAPA, with a greater inflammatory response in CAPA, and this difference may be relevant to the pathogenesis of these diseases.
1996 12355780 [Autoantibodies against GAD, GAD65 and IA-2].
1997 12369720 The serum samples were incubated with the specific antigen (GAD65, IA-2 or insulin) and the ICA analysis and the corresponding immunoprecipitation assay were performed before and after the absorption.
1998 12369720 We could then demonstrate that specific autoantibodies against GAD65 and IA-2 could be absorbed with the corresponding antigen, since ten GADA positive and six IA-2A samples turned completely negative.
1999 12369720 The results strongly indicate that the ICA reaction represents simultaneous autoimmunity against several other antigens beside GAD65, IA-2 and insulin.
2000 12369720 The serum samples were incubated with the specific antigen (GAD65, IA-2 or insulin) and the ICA analysis and the corresponding immunoprecipitation assay were performed before and after the absorption.
2001 12369720 We could then demonstrate that specific autoantibodies against GAD65 and IA-2 could be absorbed with the corresponding antigen, since ten GADA positive and six IA-2A samples turned completely negative.
2002 12369720 The results strongly indicate that the ICA reaction represents simultaneous autoimmunity against several other antigens beside GAD65, IA-2 and insulin.
2003 12369720 The serum samples were incubated with the specific antigen (GAD65, IA-2 or insulin) and the ICA analysis and the corresponding immunoprecipitation assay were performed before and after the absorption.
2004 12369720 We could then demonstrate that specific autoantibodies against GAD65 and IA-2 could be absorbed with the corresponding antigen, since ten GADA positive and six IA-2A samples turned completely negative.
2005 12369720 The results strongly indicate that the ICA reaction represents simultaneous autoimmunity against several other antigens beside GAD65, IA-2 and insulin.
2006 12482194 Serum was analysed for the presence of the enzyme glutamic acid decarboxylase, isoform 65, (GAD65) and autoantibodies against glutamic acid decarboxylase, isoform 65 (GAD65A), isoform 67 (GAD67A), insulinoma antigen 2 (IA-2) and insulin (IAA).
2007 12498766 Syngeneic splenocytes were transduced with retroviral particles carrying a cDNA construct encoding the beta cell antigen glutamic acid decarboxylase (GAD65), a secreted form of GAD65 (SGAD55), or secreted alkaline phosphatase (SEAP) as a control antigen.
2008 12516400 [Expression of autoantibodies to ICA512 and GAD in the sera of patients with diabetic ketoacidosis or ketonemia].
2009 12516400 To explore the expression of the autoantibodies to ICA512 and GAD65 in the sera of diabetic patients who will be diagnosed as Type 1 diabetes, autoantibody assays were carried out in 15 diabetic patients complicated with ketonemia or ketoacidosis and in 19 healthy controls.
2010 12524658 Circulating autoantibodies (Ab) to islet autoantigens, glutamic acid decarboxylase (GAD(65)), and tyrosine phosphatase ICA512/IA-2 have been proposed as predictive markers of type 1 diabetes mellitus.
2011 12524658 GAD(65) and ICA512/IA-2 Ab were detected in 56% and 63% of newly diagnosed children and the prevalence was not different in relationship to clinical characteristics.
2012 12524658 Levels of GAD(65) Ab positively correlated with diagnosis age (P <.05).
2013 12524658 Among the cohort of patients with diabetes of short-mid duration, GAD(65) and ICA512/IA-2 Ab were present in 44% and 45% of cases (P >.05 and P <.05 v newly diagnosed children, respectively) and more patients were identified by these Ab (68%) than by ICA alone (34%) (P <.05).
2014 12524658 In this cohort, levels of ICA512/IA-2 Ab negatively correlated with levels of glycosylated hemoglobin (HbA(1c)) (P <.005) and with daily insulin requirement (P <.05).
2015 12524658 Our findings confirm that positivity for either GAD(65) or ICA512/IA-2 Ab is a highly sensitive marker of type 1 diabetes in the pediatric age group, identifying a group of patients with absent ICA immunofluorescence.
2016 12524658 Circulating autoantibodies (Ab) to islet autoantigens, glutamic acid decarboxylase (GAD(65)), and tyrosine phosphatase ICA512/IA-2 have been proposed as predictive markers of type 1 diabetes mellitus.
2017 12524658 GAD(65) and ICA512/IA-2 Ab were detected in 56% and 63% of newly diagnosed children and the prevalence was not different in relationship to clinical characteristics.
2018 12524658 Levels of GAD(65) Ab positively correlated with diagnosis age (P <.05).
2019 12524658 Among the cohort of patients with diabetes of short-mid duration, GAD(65) and ICA512/IA-2 Ab were present in 44% and 45% of cases (P >.05 and P <.05 v newly diagnosed children, respectively) and more patients were identified by these Ab (68%) than by ICA alone (34%) (P <.05).
2020 12524658 In this cohort, levels of ICA512/IA-2 Ab negatively correlated with levels of glycosylated hemoglobin (HbA(1c)) (P <.005) and with daily insulin requirement (P <.05).
2021 12524658 Our findings confirm that positivity for either GAD(65) or ICA512/IA-2 Ab is a highly sensitive marker of type 1 diabetes in the pediatric age group, identifying a group of patients with absent ICA immunofluorescence.
2022 12524658 Circulating autoantibodies (Ab) to islet autoantigens, glutamic acid decarboxylase (GAD(65)), and tyrosine phosphatase ICA512/IA-2 have been proposed as predictive markers of type 1 diabetes mellitus.
2023 12524658 GAD(65) and ICA512/IA-2 Ab were detected in 56% and 63% of newly diagnosed children and the prevalence was not different in relationship to clinical characteristics.
2024 12524658 Levels of GAD(65) Ab positively correlated with diagnosis age (P <.05).
2025 12524658 Among the cohort of patients with diabetes of short-mid duration, GAD(65) and ICA512/IA-2 Ab were present in 44% and 45% of cases (P >.05 and P <.05 v newly diagnosed children, respectively) and more patients were identified by these Ab (68%) than by ICA alone (34%) (P <.05).
2026 12524658 In this cohort, levels of ICA512/IA-2 Ab negatively correlated with levels of glycosylated hemoglobin (HbA(1c)) (P <.005) and with daily insulin requirement (P <.05).
2027 12524658 Our findings confirm that positivity for either GAD(65) or ICA512/IA-2 Ab is a highly sensitive marker of type 1 diabetes in the pediatric age group, identifying a group of patients with absent ICA immunofluorescence.
2028 12524658 Circulating autoantibodies (Ab) to islet autoantigens, glutamic acid decarboxylase (GAD(65)), and tyrosine phosphatase ICA512/IA-2 have been proposed as predictive markers of type 1 diabetes mellitus.
2029 12524658 GAD(65) and ICA512/IA-2 Ab were detected in 56% and 63% of newly diagnosed children and the prevalence was not different in relationship to clinical characteristics.
2030 12524658 Levels of GAD(65) Ab positively correlated with diagnosis age (P <.05).
2031 12524658 Among the cohort of patients with diabetes of short-mid duration, GAD(65) and ICA512/IA-2 Ab were present in 44% and 45% of cases (P >.05 and P <.05 v newly diagnosed children, respectively) and more patients were identified by these Ab (68%) than by ICA alone (34%) (P <.05).
2032 12524658 In this cohort, levels of ICA512/IA-2 Ab negatively correlated with levels of glycosylated hemoglobin (HbA(1c)) (P <.005) and with daily insulin requirement (P <.05).
2033 12524658 Our findings confirm that positivity for either GAD(65) or ICA512/IA-2 Ab is a highly sensitive marker of type 1 diabetes in the pediatric age group, identifying a group of patients with absent ICA immunofluorescence.
2034 12604315 We have recently reported that in patients with anti-glutamic acid decarboxylase (GAD) 65(+)diabetes with residual beta-cell function, most with a 'high-titer' (>10U/ml) required insulin within 5 years, whereas most with a 'low-titer' (1.3-9.9U/ml) did not need insulin for over 15-20 years after the onset.
2035 12604315 Although GAD65-reactive CD4(+)cells in the periphery were detected in both groups, a significant positive correlation between serum IP-10 level and the number of GAD65-reactive CD4(+)cells was observed only in the high-titer group.
2036 12604315 Therefore, it has been speculated that the co-existence of GAD65-reactive IFN-gamma-producing CD4(+)cells and a high serum IP-10 level may be important for rapid disease progression as seen in the high-titer group.
2037 12604315 We have recently reported that in patients with anti-glutamic acid decarboxylase (GAD) 65(+)diabetes with residual beta-cell function, most with a 'high-titer' (>10U/ml) required insulin within 5 years, whereas most with a 'low-titer' (1.3-9.9U/ml) did not need insulin for over 15-20 years after the onset.
2038 12604315 Although GAD65-reactive CD4(+)cells in the periphery were detected in both groups, a significant positive correlation between serum IP-10 level and the number of GAD65-reactive CD4(+)cells was observed only in the high-titer group.
2039 12604315 Therefore, it has been speculated that the co-existence of GAD65-reactive IFN-gamma-producing CD4(+)cells and a high serum IP-10 level may be important for rapid disease progression as seen in the high-titer group.
2040 12657523 Both the CD4(+) and CD8(+) subsets of T cells are required for the normal development of IDDM in NOD mice.
2041 12657523 We have isolated a GAD(65) reactive, cytotoxic CD8(+) T cell clone R1 that produces large quantities of IFNgamma and accelerates the onset of insulitis.
2042 12657523 This clone proliferates and produces IFNgamma in response to GAD(65) presenting APCs and kills GAD(65) presenting targets.
2043 12657523 Furthermore, it expresses TNFalpha, CD25, CD28, CD44, CD45 and LFA1, but not CD95L This is the first example of a GAD(65)specific CD8(+) T cell clone that accelerates the onset of the insulitis, although it does not appear to accelerate the onset of diabetes.
2044 12672406 To address this, antibody titer and subclass to insulin, glutamic acid decarboxylase (GAD)65, IA-2, and IA-2beta proteins were measured by radiobinding assays in untreated or immunized female nonobese diabetic mice.
2045 12672406 Untreated nonobese diabetic mice developed autoantibodies to insulin (IAA), but not GAD or IA-2/IA-2beta, and IAA-positive mice had increased diabetes risk (P < 0.001).
2046 12672406 In immunized mice, IgG1 and lesser IgG2b insulin antibodies were promoted by subcutaneous injection of insulin plus incomplete Freund's adjuvant, insulin plus Montanide ISA 720, and glucagon plus incomplete Freund's adjuvant, but not by incomplete Freund's adjuvant plus GAD65, IA-2beta, or phenylethanolamine N-methyltransferase, or adjuvant alone.
2047 12672406 Spreading of antibody responses to GAD or IA-2/IA-2beta following immunization was rare, and antibody epitope spreading was only detected in IA-2beta immunized mice.
2048 12745667 Wild bank voles (Clethrionomys glareolus) kept in the laboratory under barren housing conditions develop high incidences of type 1 diabetes mellitus due to beta cell-specific lysis in association with the appearance of GAD65, IA-2, and insulin autoantibodies.
2049 12745669 Two groups of bank voles were analyzed for diabetes, pancreas histology, autoantibodies to glutamic acid decarboxylase (GAD65), IA-2, and insulin by standardized radioligand-binding assays as well as antibodies to in vitro transcribed and translated Ljungan virus antigens.
2050 12745669 Compared to nondiabetic group B bank voles, diabetic animals had increased levels of GAD65 (P < .0001), IA-2 (P < .0001), and insulin (P = .03) autoantibodies.
2051 12745669 Two groups of bank voles were analyzed for diabetes, pancreas histology, autoantibodies to glutamic acid decarboxylase (GAD65), IA-2, and insulin by standardized radioligand-binding assays as well as antibodies to in vitro transcribed and translated Ljungan virus antigens.
2052 12745669 Compared to nondiabetic group B bank voles, diabetic animals had increased levels of GAD65 (P < .0001), IA-2 (P < .0001), and insulin (P = .03) autoantibodies.
2053 12753809 A positive correlation between serum hsp90AA and glutamic acid decarboxylase (GAD65) autoantibody (GAA) was also observed.
2054 12797903 Furthermore, the monoclonal antibody against E. coli GAD does not recognise human recombinant GAD65 in an ELISA.
2055 12817032 NOD recipient mice immunized with pDNA encoding a glutamic acid decarboxylase 65 (GAD65)-IgFc fusion protein (JwGAD65), IL-4 (JwIL4), and IL-10 (pIL10) exhibited an increased number of intact pro-islets expressing high levels of insulin 15 wk posttransplant, relative to NOD recipient mice immunized with pDNA encoding a hen egg lysozyme (HEL)-IgFc fusion protein (JwHEL)+JwIL4 and pIL10 or left untreated.
2056 12817032 Efficient protection of pro-islet grafts correlated with a marked reduction in GAD65-specific IFN-gamma reactivity and an increase in IL-10-secreting T cells.
2057 12817032 NOD recipient mice immunized with pDNA encoding a glutamic acid decarboxylase 65 (GAD65)-IgFc fusion protein (JwGAD65), IL-4 (JwIL4), and IL-10 (pIL10) exhibited an increased number of intact pro-islets expressing high levels of insulin 15 wk posttransplant, relative to NOD recipient mice immunized with pDNA encoding a hen egg lysozyme (HEL)-IgFc fusion protein (JwHEL)+JwIL4 and pIL10 or left untreated.
2058 12817032 Efficient protection of pro-islet grafts correlated with a marked reduction in GAD65-specific IFN-gamma reactivity and an increase in IL-10-secreting T cells.
2059 14557453 Disease-specific epitope profiles of glutamic acid decarboxylase (GAD)65 autoantibodies (GAD65Ab) were studied in slowly progressive type 1 (insulin-dependent) diabetes mellitus (SPIDDM) and acute onset type 1 (insulin-dependent) diabetes mellitus (AIDDM) using seven kinds of GAD65/67 chimeric molecules.
2060 14624759 Samples from two subjects were pre-tested for responses to sub-optimal concentrations of tetanus toxoid, representing a low frequency recall response, and peptides from diabetes associated autoantigens GAD65, IA-2 and HSP60.
2061 14679041 Both TCR transgenics respond to their cognate peptide/MHC (GAD65 206-220 and 286-300) and produce IL-2, IFN-gamma, and small amounts of IL-10.
2062 14679041 Thus, GAD65 specific TCR transgenic T cells (1) must express a second a chain to survive negative selection, (2) produce IL-2 and IFN-gamma, and (3) have a mildly protective effect on transfer of diabetes with diabetogenic spleen cells.
2063 14679041 Both TCR transgenics respond to their cognate peptide/MHC (GAD65 206-220 and 286-300) and produce IL-2, IFN-gamma, and small amounts of IL-10.
2064 14679041 Thus, GAD65 specific TCR transgenic T cells (1) must express a second a chain to survive negative selection, (2) produce IL-2 and IFN-gamma, and (3) have a mildly protective effect on transfer of diabetes with diabetogenic spleen cells.
2065 14679074 Autoantibodies against GAD(65) (GADA), tyrosine phosphatase (IA-2A), and insulin (IAA) were determined by radioligand-binding assays.
2066 14679074 Our results suggest that the mechanisms of beta cell tolerance to GAD and IA-2 differ in healthy children.
2067 14679080 In addition, 87 NHW first-degree relatives of type 1 diabetes patients were studied: 33 positive and 54 negative for autoantibodies to insulin, GAD65, or IA-2.
2068 14679095 LADA was identified by a clinical phenotype of type 2 diabetes with antibodies to GAD65 and/or IA-2/ICA512.
2069 14679097 Autoantibodies to GAD65 and IA-2 antibodies are increased, but not tissue transglutaminase (TTG-Ab) in type 2 diabetes mellitus (T2DM) patients from South India.
2070 14679097 In this study, we measured autoantibodies to GAD65, IA-2, and TTG in T2DM patients from Southern India.
2071 14679097 Our results show that either GAD65 or IA-2 was present in 30% of T2DM patients (n = 155) and in 3% of controls for GAD65 and 1% of controls for IA-2 (n = 105).
2072 14679097 Autoantibodies to GAD65 and IA-2 antibodies are increased, but not tissue transglutaminase (TTG-Ab) in type 2 diabetes mellitus (T2DM) patients from South India.
2073 14679097 In this study, we measured autoantibodies to GAD65, IA-2, and TTG in T2DM patients from Southern India.
2074 14679097 Our results show that either GAD65 or IA-2 was present in 30% of T2DM patients (n = 155) and in 3% of controls for GAD65 and 1% of controls for IA-2 (n = 105).
2075 14679097 Autoantibodies to GAD65 and IA-2 antibodies are increased, but not tissue transglutaminase (TTG-Ab) in type 2 diabetes mellitus (T2DM) patients from South India.
2076 14679097 In this study, we measured autoantibodies to GAD65, IA-2, and TTG in T2DM patients from Southern India.
2077 14679097 Our results show that either GAD65 or IA-2 was present in 30% of T2DM patients (n = 155) and in 3% of controls for GAD65 and 1% of controls for IA-2 (n = 105).
2078 14679098 GAD65 and IA-2 autoantibodies were measured by radioligand binding assay using recombinant human GAD65 and IA-2.
2079 14725793 Glutamic acid decarboxylase (GAD65) is one of the autoantigens that initiates pathogenic T cell responses against insulin-secreting pancreatic beta cells in Type 1 diabetes (T1D).
2080 15016223 To determine the prevalence of diabetes autoimmune markers, ICA512, GAD65 and insulin autoantibodies (IAA) antibodies were measured.
2081 15016223 GAD and ICA512 antibody results suggest a relative lack of diabetes immune markers in infants and toddlers with new-onset diabetes.
2082 15056761 Induction of oral tolerance to prevent diabetes with transgenic plants requires glutamic acid decarboxylase (GAD) and IL-4.
2083 15056761 In this study, human GAD65 (hGAD65), as well as murine IL-4, was expressed in transgenic plants for feeding trials.
2084 15056761 Both IL-4 and hGAD65 plant tissue were required to protect nonobese diabetic mice from diabetes, and no benefit was found if either was used alone.
2085 15056761 Combined therapy enhanced levels of IgG1 anti-GAD antibodies, increased splenocyte IL-4/IFN-gamma cytokine responses, and produced protective regulatory T cells.
2086 15056761 These results demonstrate that orally administered plant IL-4 remains biologically active and is synergistic when given with hGAD65 in inducing robust oral immune tolerance.
2087 15056761 Using transgenic plants expressing IL-4 and GAD65 may be a novel clinical approach to the prevention of human type 1 diabetes by oral tolerance.
2088 15056761 Induction of oral tolerance to prevent diabetes with transgenic plants requires glutamic acid decarboxylase (GAD) and IL-4.
2089 15056761 In this study, human GAD65 (hGAD65), as well as murine IL-4, was expressed in transgenic plants for feeding trials.
2090 15056761 Both IL-4 and hGAD65 plant tissue were required to protect nonobese diabetic mice from diabetes, and no benefit was found if either was used alone.
2091 15056761 Combined therapy enhanced levels of IgG1 anti-GAD antibodies, increased splenocyte IL-4/IFN-gamma cytokine responses, and produced protective regulatory T cells.
2092 15056761 These results demonstrate that orally administered plant IL-4 remains biologically active and is synergistic when given with hGAD65 in inducing robust oral immune tolerance.
2093 15056761 Using transgenic plants expressing IL-4 and GAD65 may be a novel clinical approach to the prevention of human type 1 diabetes by oral tolerance.
2094 15056761 Induction of oral tolerance to prevent diabetes with transgenic plants requires glutamic acid decarboxylase (GAD) and IL-4.
2095 15056761 In this study, human GAD65 (hGAD65), as well as murine IL-4, was expressed in transgenic plants for feeding trials.
2096 15056761 Both IL-4 and hGAD65 plant tissue were required to protect nonobese diabetic mice from diabetes, and no benefit was found if either was used alone.
2097 15056761 Combined therapy enhanced levels of IgG1 anti-GAD antibodies, increased splenocyte IL-4/IFN-gamma cytokine responses, and produced protective regulatory T cells.
2098 15056761 These results demonstrate that orally administered plant IL-4 remains biologically active and is synergistic when given with hGAD65 in inducing robust oral immune tolerance.
2099 15056761 Using transgenic plants expressing IL-4 and GAD65 may be a novel clinical approach to the prevention of human type 1 diabetes by oral tolerance.
2100 15056761 Induction of oral tolerance to prevent diabetes with transgenic plants requires glutamic acid decarboxylase (GAD) and IL-4.
2101 15056761 In this study, human GAD65 (hGAD65), as well as murine IL-4, was expressed in transgenic plants for feeding trials.
2102 15056761 Both IL-4 and hGAD65 plant tissue were required to protect nonobese diabetic mice from diabetes, and no benefit was found if either was used alone.
2103 15056761 Combined therapy enhanced levels of IgG1 anti-GAD antibodies, increased splenocyte IL-4/IFN-gamma cytokine responses, and produced protective regulatory T cells.
2104 15056761 These results demonstrate that orally administered plant IL-4 remains biologically active and is synergistic when given with hGAD65 in inducing robust oral immune tolerance.
2105 15056761 Using transgenic plants expressing IL-4 and GAD65 may be a novel clinical approach to the prevention of human type 1 diabetes by oral tolerance.
2106 15070923 The structurally related group II pyridoxal phosphate (PLP)-dependent amino acid decarboxylases glutamic acid decarboxylase (GAD), aromatic L-amino acid decarboxylase (AADC), and histidine decarboxylase (HDC) are known autoantigens in endocrine disorders.
2107 15070923 We report, for the first time, the prevalence of serum autoantibody reactivity against cysteine sulfinic acid decarboxylase (CSAD), an enzyme that shares 50% amino acid identity with the 65- and 67-kDa isoforms of GAD (GAD-65 and GAD-67), in endocrine autoimmune disease.
2108 15070923 Anti-CSAD antibodies cross-reacted with GAD-65, and the anti-CSAD-positive sera were also reactive with AADC and HDC.
2109 15070923 The low frequency of anti-CSAD reactivity is in striking contrast to the prevalence of antibodies against GAD-65, AADC, and HDC in APS1 patients, suggesting that different mechanisms control the immunological tolerance toward CSAD and the other group II decarboxylases.
2110 15070923 The structurally related group II pyridoxal phosphate (PLP)-dependent amino acid decarboxylases glutamic acid decarboxylase (GAD), aromatic L-amino acid decarboxylase (AADC), and histidine decarboxylase (HDC) are known autoantigens in endocrine disorders.
2111 15070923 We report, for the first time, the prevalence of serum autoantibody reactivity against cysteine sulfinic acid decarboxylase (CSAD), an enzyme that shares 50% amino acid identity with the 65- and 67-kDa isoforms of GAD (GAD-65 and GAD-67), in endocrine autoimmune disease.
2112 15070923 Anti-CSAD antibodies cross-reacted with GAD-65, and the anti-CSAD-positive sera were also reactive with AADC and HDC.
2113 15070923 The low frequency of anti-CSAD reactivity is in striking contrast to the prevalence of antibodies against GAD-65, AADC, and HDC in APS1 patients, suggesting that different mechanisms control the immunological tolerance toward CSAD and the other group II decarboxylases.
2114 15070923 The structurally related group II pyridoxal phosphate (PLP)-dependent amino acid decarboxylases glutamic acid decarboxylase (GAD), aromatic L-amino acid decarboxylase (AADC), and histidine decarboxylase (HDC) are known autoantigens in endocrine disorders.
2115 15070923 We report, for the first time, the prevalence of serum autoantibody reactivity against cysteine sulfinic acid decarboxylase (CSAD), an enzyme that shares 50% amino acid identity with the 65- and 67-kDa isoforms of GAD (GAD-65 and GAD-67), in endocrine autoimmune disease.
2116 15070923 Anti-CSAD antibodies cross-reacted with GAD-65, and the anti-CSAD-positive sera were also reactive with AADC and HDC.
2117 15070923 The low frequency of anti-CSAD reactivity is in striking contrast to the prevalence of antibodies against GAD-65, AADC, and HDC in APS1 patients, suggesting that different mechanisms control the immunological tolerance toward CSAD and the other group II decarboxylases.
2118 15098924 Glutamic acid decarboxylase (GAD65 and GAD67) in pancreatic beta cells is the target of autoantibodies and autoreactive T cells in insulin-dependent diabetes mellitus (IDDM).
2119 15098924 Regulating expression of GAD perhaps is a practical approach to treat IDDM.
2120 15098924 In this study, we established an in vitro system, in which GAD was expressed and glutamate treatment produced over-expression of GAD67 and GAD65 in rat islet cells.
2121 15098924 These findings suggest that the over-expression of GAD67 induced by glutamate in islet cells of rat may act as a suitable cellular model to study GAD autoreactivity during the development of IDDM.
2122 15098924 Meanwhile, it indicates that ALC, an ester of the trimethylated amino acid, can block glutamate-induced over-expression of GAD67, a key beta-cell autoantigen, suggesting a therapeutic potential of ALC in IDDM.
2123 15098924 Glutamic acid decarboxylase (GAD65 and GAD67) in pancreatic beta cells is the target of autoantibodies and autoreactive T cells in insulin-dependent diabetes mellitus (IDDM).
2124 15098924 Regulating expression of GAD perhaps is a practical approach to treat IDDM.
2125 15098924 In this study, we established an in vitro system, in which GAD was expressed and glutamate treatment produced over-expression of GAD67 and GAD65 in rat islet cells.
2126 15098924 These findings suggest that the over-expression of GAD67 induced by glutamate in islet cells of rat may act as a suitable cellular model to study GAD autoreactivity during the development of IDDM.
2127 15098924 Meanwhile, it indicates that ALC, an ester of the trimethylated amino acid, can block glutamate-induced over-expression of GAD67, a key beta-cell autoantigen, suggesting a therapeutic potential of ALC in IDDM.
2128 15163889 T cells recognize multiple GAD65 and proinsulin epitopes in human type 1 diabetes, suggesting determinant spreading.
2129 15163889 Using comprehensive peptide libraries that cover the entire sequence of two major candidate autoantigens, GAD65 and proinsulin, we measured the in vivo frequencies of peptide-specific, IFN-gamma-producing memory T cells in 27 diabetic patients, 14 high risk individuals, and 15 partially HLA-matched healthy controls.
2130 15163889 T cells recognize multiple GAD65 and proinsulin epitopes in human type 1 diabetes, suggesting determinant spreading.
2131 15163889 Using comprehensive peptide libraries that cover the entire sequence of two major candidate autoantigens, GAD65 and proinsulin, we measured the in vivo frequencies of peptide-specific, IFN-gamma-producing memory T cells in 27 diabetic patients, 14 high risk individuals, and 15 partially HLA-matched healthy controls.
2132 15270809 Autoantibodies against GAD65 and IA-2 in recently diagnosed Type 1 diabetic children from Western India.
2133 15277377 GAD65-specific CD4+ T-cells with high antigen avidity are prevalent in peripheral blood of patients with type 1 diabetes.
2134 15381770 However, we previously reported that nonobese diabetic (NOD) mice transgenic for a T cell antigen receptor (TCR) specific for one of the immunodominant epitopes of GAD65, peptide 286-300 (G286), are protected from insulitis and diabetes.
2135 15381770 Both G206 and G286 T cells produce immunoregulatory cytokines IFN-gamma and IL-10 at low levels when activated by cognate antigens.
2136 15501398 Expression of cytoplasmic islet cell (ICA), GAD65, ICA512 and insulin autoantibodies in 357 different-sex (DZ) potential non-diabetic twins of T1DM patients was, respectively, 4.5%, 4.7%, 3.0% and 2.4%, which was lower than in 539 same-sex potential non-diabetic twins (including MZ and DZ) of T1DM patients for ICA (7.8%, p < 0.05), GAD65 (13.4%, p < 0.0001) and ICA512 (6.5%, p < 0.03).
2137 15501398 In contrast, expression of ICA, GAD65, ICA512 and insulin autoantibodies was not significantly different in different-sex (DZ) potential twins versus all siblings (respectively, 4.2%, 4.8%, 2.2%, 2.5%), different-sex siblings (3.9%, 4.9%, 2.2%, 2.5%) or same-sex siblings (4.4%, 4.7%, 2.2%, 2.5%) of T1DM patients.
2138 15501398 Expression of cytoplasmic islet cell (ICA), GAD65, ICA512 and insulin autoantibodies in 357 different-sex (DZ) potential non-diabetic twins of T1DM patients was, respectively, 4.5%, 4.7%, 3.0% and 2.4%, which was lower than in 539 same-sex potential non-diabetic twins (including MZ and DZ) of T1DM patients for ICA (7.8%, p < 0.05), GAD65 (13.4%, p < 0.0001) and ICA512 (6.5%, p < 0.03).
2139 15501398 In contrast, expression of ICA, GAD65, ICA512 and insulin autoantibodies was not significantly different in different-sex (DZ) potential twins versus all siblings (respectively, 4.2%, 4.8%, 2.2%, 2.5%), different-sex siblings (3.9%, 4.9%, 2.2%, 2.5%) or same-sex siblings (4.4%, 4.7%, 2.2%, 2.5%) of T1DM patients.
2140 15531528 GAD65 and IA-2 autoantibodies were analyzed in 1436 Sardinian subjects classified with T2DM and in 384 nondiabetic patient controls.
2141 15531528 Among the T2DM patients, 5.1% had GAD65 (P < 0.001) and 2.4% had IA-2 autoantibodies, compared with 1.3 and 1.6%, respectively, among the controls.
2142 15531528 GAD65 and IA-2 autoantibodies were analyzed in 1436 Sardinian subjects classified with T2DM and in 384 nondiabetic patient controls.
2143 15531528 Among the T2DM patients, 5.1% had GAD65 (P < 0.001) and 2.4% had IA-2 autoantibodies, compared with 1.3 and 1.6%, respectively, among the controls.
2144 15549775 Inhibition of altered peptide ligand-mediated antagonism of human GAD65-responsive CD4+ T cells by non-antagonizable T cells.
2145 15549775 In this study we identified several altered peptide ligands derived from the type 1 diabetes-associated autoantigen human glutamic acid decarboxylase 65 (hGAD65) epitope that were capable of antagonizing a subset of a panel of human CD4(+) GAD65 (555-567)-responsive T cell clones derived from a diabetic individual.
2146 15549775 Inhibition of altered peptide ligand-mediated antagonism of human GAD65-responsive CD4+ T cells by non-antagonizable T cells.
2147 15549775 In this study we identified several altered peptide ligands derived from the type 1 diabetes-associated autoantigen human glutamic acid decarboxylase 65 (hGAD65) epitope that were capable of antagonizing a subset of a panel of human CD4(+) GAD65 (555-567)-responsive T cell clones derived from a diabetic individual.
2148 15564450 This epitope is recognized by effector memory (gamma interferon [IFN-gamma]-producing) CD8 T cells in the peripheral blood at a frequency of responders that suggests that it is a major focus of the anti-CVB4 response.
2149 15564450 However, P2C(1137-1145)-specific cytotoxic T lymphocyte (CTL) lines were not activated to produce IFN-gamma by the GAD(65) peptide homologue and did not show cytotoxic activity in the presence of appropriately labeled targets.
2150 15629156 The antigenic epitopes within GAD65(448-585), GAD65(487-585), and GAD65(512-585) against insulin-dependent diabetes mellitus (IDDM) marker (autoantibodies against GAD65) were localized at the surface of the spherical protein nanoparticles so that anti-GAD65 Ab could recognize them.
2151 15671113 The fetal insulin hypothesis proposes that low birth weight might be mediated partly by genetic factors that impair insulin secretion/sensitivity during the fetal stage, as shown for glucokinase, the ATP-sensitive K+ channel subunit Kir6.2, and the small heterodimer partner genes.
2152 15671113 Glutamic acid decarboxylase 2 gene (GAD2) overexpression impairs insulin secretion in animals.
2153 15671113 In the present study, we investigated potential effects of the functional -243 A-->G polymorphism in the 5' promoter region of the GAD2 gene on fetal growth, insulin secretion, food intake, and risk of obesity in 635 French Caucasian severely obese children from three different medical centers.
2154 15671113 These results confirm the association between GAD2-243 promoter SNP and the risk for obesity and suggest that GAD2 may be a polygenic component of the complex mechanisms linking birth weight to further risk for metabolic diseases, possibly involving the pleiotropic effect of insulin on fetal growth and later on feeding behavior.
2155 15671113 The fetal insulin hypothesis proposes that low birth weight might be mediated partly by genetic factors that impair insulin secretion/sensitivity during the fetal stage, as shown for glucokinase, the ATP-sensitive K+ channel subunit Kir6.2, and the small heterodimer partner genes.
2156 15671113 Glutamic acid decarboxylase 2 gene (GAD2) overexpression impairs insulin secretion in animals.
2157 15671113 In the present study, we investigated potential effects of the functional -243 A-->G polymorphism in the 5' promoter region of the GAD2 gene on fetal growth, insulin secretion, food intake, and risk of obesity in 635 French Caucasian severely obese children from three different medical centers.
2158 15671113 These results confirm the association between GAD2-243 promoter SNP and the risk for obesity and suggest that GAD2 may be a polygenic component of the complex mechanisms linking birth weight to further risk for metabolic diseases, possibly involving the pleiotropic effect of insulin on fetal growth and later on feeding behavior.
2159 15671113 The fetal insulin hypothesis proposes that low birth weight might be mediated partly by genetic factors that impair insulin secretion/sensitivity during the fetal stage, as shown for glucokinase, the ATP-sensitive K+ channel subunit Kir6.2, and the small heterodimer partner genes.
2160 15671113 Glutamic acid decarboxylase 2 gene (GAD2) overexpression impairs insulin secretion in animals.
2161 15671113 In the present study, we investigated potential effects of the functional -243 A-->G polymorphism in the 5' promoter region of the GAD2 gene on fetal growth, insulin secretion, food intake, and risk of obesity in 635 French Caucasian severely obese children from three different medical centers.
2162 15671113 These results confirm the association between GAD2-243 promoter SNP and the risk for obesity and suggest that GAD2 may be a polygenic component of the complex mechanisms linking birth weight to further risk for metabolic diseases, possibly involving the pleiotropic effect of insulin on fetal growth and later on feeding behavior.
2163 15683454 Using the sensitive enzyme-linked immunospot (ELISPOT) technique to divide Th1- from Th2-like lymphocytes, secretion of interferon-gamma (IFN-gamma) and interleukin-4 was analysed from lymphocytes spontaneously and after in vitro stimulation with different antigens, based on present paradigms regarding the pathogenesis of type 1 diabetes.
2164 15683454 Compared to the response observed in healthy individuals, we found that individuals with a high risk of developing type 1 diabetes, especially children, responded with less IFN-gamma secretion to the three autoantigens glutamic acid decarboxylase 65 (GAD65), insulin and tyrosinphosphatase (IA-2).
2165 15690345 The 65 kDa human isoform of glutamate decarboxylase, GAD65, plays a central role in neurotransmission in higher vertebrates and is a typical autoantigen in several human autoimmune diseases, such as insulin-dependent diabetes mellitus (IDDM), Stiff-man syndrome and autoimmune polyendocrine syndrome type I.
2166 15690345 Herein a model of GAD65 is presented, which is based on the recently solved crystal structures of mammalian DOPA decarboxylase and of bacterial glutamate decarboxylase.
2167 15690345 The 65 kDa human isoform of glutamate decarboxylase, GAD65, plays a central role in neurotransmission in higher vertebrates and is a typical autoantigen in several human autoimmune diseases, such as insulin-dependent diabetes mellitus (IDDM), Stiff-man syndrome and autoimmune polyendocrine syndrome type I.
2168 15690345 Herein a model of GAD65 is presented, which is based on the recently solved crystal structures of mammalian DOPA decarboxylase and of bacterial glutamate decarboxylase.
2169 15699488 CD4+ T cell proliferation in response to GAD and proinsulin in healthy, pre-diabetic, and diabetic donors.
2170 15699488 However, peripheral blood cells from healthy, pre-diabetic and diabetic donors exhibited overlap in responses to glutamic acid decarboxylase (GAD65) and proinsulin (PI).
2171 15717840 Specific antibodies to islet antigens--glutamic acid decarboxylase (GAD65), protein thyrosine phosphatase IA-2alpha, and to thyroid autoantigens--thyroid microsomal peroxidase (TPO) and thyroglobulin (TG) and also thyroid stimulating hormone (TSH) were measured by RIA.
2172 15728483 Different diabetogenic potential of autoaggressive CD8+ clones associated with IFN-gamma-inducible protein 10 (CXC chemokine ligand 10) production but not cytokine expression, cytolytic activity, or homing characteristics.
2173 15728483 From studies in animal models, CD8(+) T cells recognizing autoantigens such as islet-specific glucose-6-phosphatase catalytic subunit-related protein, insulin, or glutamic acid decarboxylase (GAD) are believed to play important roles in both the early and late phases of beta cell destruction.
2174 15728483 In this study, we investigated the factors governing the diabetogenic potential of autoreactive CD8(+) clones isolated from spleens of NOD mice that had been immunized with GAD65(515-524) or insulin B-chain(15-23) peptides.
2175 15728483 Although these two clones were identical in most phenotypic and functional aspects, for example cytokine production and killing of autologous beta cells, they differed in the expression of IFN-gamma-inducible protein-10, which was only produced at high levels by the insulin-specific clone, but not by the GAD65-specific clone, and other autoantigen-specific nonpathogenic CD8 T cell clones.
2176 15728483 Interestingly, upon i.p. injection into neonatal mice, only the insulin B-chain(15-23)-reactive CD8(+) T clone accelerated diabetes in all recipients after 4 wk, although both insulin- and GAD-reactive clones homed to pancreas and pancreatic lymph nodes with similar kinetics.
2177 15728483 Thus, secretion of IFN-gamma-inducible protein-10 by autoaggressive CD8(+) lymphocytes might determine their diabetogenic capacity by affecting recruitment of cells to the insulitic lesion.
2178 15728483 Different diabetogenic potential of autoaggressive CD8+ clones associated with IFN-gamma-inducible protein 10 (CXC chemokine ligand 10) production but not cytokine expression, cytolytic activity, or homing characteristics.
2179 15728483 From studies in animal models, CD8(+) T cells recognizing autoantigens such as islet-specific glucose-6-phosphatase catalytic subunit-related protein, insulin, or glutamic acid decarboxylase (GAD) are believed to play important roles in both the early and late phases of beta cell destruction.
2180 15728483 In this study, we investigated the factors governing the diabetogenic potential of autoreactive CD8(+) clones isolated from spleens of NOD mice that had been immunized with GAD65(515-524) or insulin B-chain(15-23) peptides.
2181 15728483 Although these two clones were identical in most phenotypic and functional aspects, for example cytokine production and killing of autologous beta cells, they differed in the expression of IFN-gamma-inducible protein-10, which was only produced at high levels by the insulin-specific clone, but not by the GAD65-specific clone, and other autoantigen-specific nonpathogenic CD8 T cell clones.
2182 15728483 Interestingly, upon i.p. injection into neonatal mice, only the insulin B-chain(15-23)-reactive CD8(+) T clone accelerated diabetes in all recipients after 4 wk, although both insulin- and GAD-reactive clones homed to pancreas and pancreatic lymph nodes with similar kinetics.
2183 15728483 Thus, secretion of IFN-gamma-inducible protein-10 by autoaggressive CD8(+) lymphocytes might determine their diabetogenic capacity by affecting recruitment of cells to the insulitic lesion.
2184 15814672 Tolerance induction of autoreactive T cells against pancreatic beta cell-specific autoantigens such as glutamic acid decarboxylase 65 (GAD65) and insulin has been attempted as a method to prevent autoimmune diabetes.
2185 15814672 In this study, we investigate whether adenoassociated virus (AAV) gene delivery of multiple immunodominant epitopes expressing GAD(500-585) could induce potent immune tolerance and persistently suppress autoimmune diabetes in NOD mice.
2186 15814672 This prevention was marked by the inactivation of GAD(500-585)-responsive T lymphocytes, the enhanced GAD(500-585)-specific Th2 response (characterized by increased IL-4, IL-10 production, and decreased IFN-gamma production; especially elevated anti-GAD(500-585) IgG1 titer; and relatively unchanged anti-GAD(500-585) IgG2b titer), the increased secretion of TGF-beta, and the production of protective regulatory cells.
2187 15814672 These data indicate that using AAV, a vector with advantage for therapeutic gene delivery, to transfer autoantigen peptide GAD(500-585), can induce immunological tolerance through active suppression of effector T cells and prevent type I diabetes in NOD mice.
2188 15829408 Absence of avidity maturation of autoantibodies to the protein tyrosine phosphatase-like IA-2 molecule and glutamic acid decarboxylase (GAD65) during progression to type 1 diabetes.
2189 15829408 To assess whether the analysis of the avidity of autoantibodies against the protein tyrosine phosphatase-like IA-2 molecule and glutamic acid decarboxylase (GAD65) could improve the accuracy of risk assessment of progression to clinical type 1 diabetes, we established methods for the determination of the autoantibody avidity based on our previously developed time-resolved fluorometric IA-2 and GAD65 autoantibody (IA-2A and GADA) assays.
2190 15829408 Absence of avidity maturation of autoantibodies to the protein tyrosine phosphatase-like IA-2 molecule and glutamic acid decarboxylase (GAD65) during progression to type 1 diabetes.
2191 15829408 To assess whether the analysis of the avidity of autoantibodies against the protein tyrosine phosphatase-like IA-2 molecule and glutamic acid decarboxylase (GAD65) could improve the accuracy of risk assessment of progression to clinical type 1 diabetes, we established methods for the determination of the autoantibody avidity based on our previously developed time-resolved fluorometric IA-2 and GAD65 autoantibody (IA-2A and GADA) assays.
2192 15963796 Sensitive non-isotopic assays for autoantibodies to IA-2 and to a combination of both IA-2 and GAD65.
2193 16009268 All sera from Group A reacted with GAD(65) protein on Western blots.
2194 16009268 Furthermore, our results suggest that HLA-DRB1*1502-DQB1*0601 or DRB1*1501-DQB1*0602/DRB1*0405-DQB1*0401 heterozygous genotypes may be associated with high production of anti-GADab that recognizes the linear epitope(s) on the GAD(65) protein.
2195 16009268 All sera from Group A reacted with GAD(65) protein on Western blots.
2196 16009268 Furthermore, our results suggest that HLA-DRB1*1502-DQB1*0601 or DRB1*1501-DQB1*0602/DRB1*0405-DQB1*0401 heterozygous genotypes may be associated with high production of anti-GADab that recognizes the linear epitope(s) on the GAD(65) protein.
2197 16148057 Expression of IFN-gamma and IL-4 mRNA was determined by real-time reverse-transcriptase polymerase chain reaction (RT-PCR) and secretion of IFN-gamma, IL-10, and IL-13 in cell-culture supernatants by ELISA after stimulation with glutamic acid decarboxylase (GAD65) (a.a. 247-279), the ABBOS peptide (a.a. 152-169), insulin, phytohemagglutinin (PHA), and keyhole limpet hemocyanin (KLH).
2198 16148057 Thus, the ratio of IFN-gamma/IL-4 mRNA expression after in vitro stimulation with a peptide of the autoantigen GAD65 was reduced after treatment in the photopheresis group.
2199 16148057 The IFN-gamma/IL-4 mRNA expression ratio after in vitro stimulation with insulin was also lower in children treated with photopheresis compared with the placebo group.
2200 16148057 Expression of IFN-gamma and IL-4 mRNA was determined by real-time reverse-transcriptase polymerase chain reaction (RT-PCR) and secretion of IFN-gamma, IL-10, and IL-13 in cell-culture supernatants by ELISA after stimulation with glutamic acid decarboxylase (GAD65) (a.a. 247-279), the ABBOS peptide (a.a. 152-169), insulin, phytohemagglutinin (PHA), and keyhole limpet hemocyanin (KLH).
2201 16148057 Thus, the ratio of IFN-gamma/IL-4 mRNA expression after in vitro stimulation with a peptide of the autoantigen GAD65 was reduced after treatment in the photopheresis group.
2202 16148057 The IFN-gamma/IL-4 mRNA expression ratio after in vitro stimulation with insulin was also lower in children treated with photopheresis compared with the placebo group.
2203 16153889 Autoantibodies against GAD65 (Mr 65.000 isoform of glutamic acid decarboxylase), IA-2 (insulinoma-associated protein IA-2) or insulin, alone or in combination, predict disease.
2204 16177033 Insulin inhibits neuropeptide Y gene expression in the arcuate nucleus through GABAergic systems.
2205 16177033 Conversely, insulin (10(-11) to 10(-9) M) significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was abolished in the presence of TTX.
2206 16177033 The GABAB agonist baclofen significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was completely abolished in the presence of either the GABAA antagonist bicuculline or the GABAB antagonist CGP35348 (p-3-aminopropyl-p-diethoxymethyl phosphoric acid).
2207 16177033 Furthermore, increases in the GABA-synthesizing enzyme glutamic acid decarboxylase 65 (GAD65) mRNA expression preceded decreases in NPY mRNA expression in the arcuate nucleus in the cultures.
2208 16177033 Experiments in vivo also demonstrated that increases in GAD65 mRNA expression in the arcuate nucleus preceded decreases in the NPY mRNA expression in a fasting-refeeding paradigm and that intracerebroventricular injection of insulin increased GAD65 mRNA expression in the arcuate nucleus in fasted rats.
2209 16177033 These data suggest that insulin inhibits NPY gene expression in the arcuate nucleus through GABAergic systems.
2210 16177033 Insulin inhibits neuropeptide Y gene expression in the arcuate nucleus through GABAergic systems.
2211 16177033 Conversely, insulin (10(-11) to 10(-9) M) significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was abolished in the presence of TTX.
2212 16177033 The GABAB agonist baclofen significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was completely abolished in the presence of either the GABAA antagonist bicuculline or the GABAB antagonist CGP35348 (p-3-aminopropyl-p-diethoxymethyl phosphoric acid).
2213 16177033 Furthermore, increases in the GABA-synthesizing enzyme glutamic acid decarboxylase 65 (GAD65) mRNA expression preceded decreases in NPY mRNA expression in the arcuate nucleus in the cultures.
2214 16177033 Experiments in vivo also demonstrated that increases in GAD65 mRNA expression in the arcuate nucleus preceded decreases in the NPY mRNA expression in a fasting-refeeding paradigm and that intracerebroventricular injection of insulin increased GAD65 mRNA expression in the arcuate nucleus in fasted rats.
2215 16177033 These data suggest that insulin inhibits NPY gene expression in the arcuate nucleus through GABAergic systems.
2216 16206515 We examined the heritability of autoantibodies to glutamic acid decarboxylase (GAD65) in type 1 diabetes, and to thyroglobulin (Tg) in chronic lymphocytic thyroiditis and thyrotoxicosis, using regression of offspring on midparent (ROMP) methods.
2217 16236123 Particular interest has focused on the CVB4 non-structural protein P2C, which we previously showed to be a major target of the effector memory anti-CVB4 CD4 T-cell response, and which harbours a region of sequence similarity with the islet autoantigen, glutamic acid decarboxylase (GAD65).
2218 16236123 In the present study therefore we examined the affinity of 20-mer overlapping P2C peptides for soluble HLA-DR4, -DR3, -DQ2 and -DQ8.
2219 16236123 DR4 and DQ8, P =0.0076; DR3 and DQ2 P = 0.002).
2220 16249070 Comparative study of GAD65-specific CD4+ T cells in healthy and type 1 diabetic subjects.
2221 16249070 The prevalence of autoreactive CD4+ T cells towards the immunodominant GAD65(555-567) epitope in DR4 healthy and T1D subjects was investigated with class II tetramers.
2222 16249070 A slightly higher percentage of diabetic subjects had GAD65(555-567) tetramer-positive T cells upon GAD65(555-567) peptide stimulation on the total CD4+ T-cell populations compared to healthy subjects.
2223 16249070 In contrast, three quarters of subjects in both groups had tetramer-positive T cells resulting from stimulation of the CD4+CD25+ regulatory T-cell depleted CD4+ T cells.
2224 16249070 These findings suggested that there is no difference in thymic selection of DR4 restricted GAD-reactive T cells amongst healthy and T1D individuals but GAD65(555-567)-reactive T cells have been preferentially activated in diabetic patients.
2225 16249070 Comparative study of GAD65-specific CD4+ T cells in healthy and type 1 diabetic subjects.
2226 16249070 The prevalence of autoreactive CD4+ T cells towards the immunodominant GAD65(555-567) epitope in DR4 healthy and T1D subjects was investigated with class II tetramers.
2227 16249070 A slightly higher percentage of diabetic subjects had GAD65(555-567) tetramer-positive T cells upon GAD65(555-567) peptide stimulation on the total CD4+ T-cell populations compared to healthy subjects.
2228 16249070 In contrast, three quarters of subjects in both groups had tetramer-positive T cells resulting from stimulation of the CD4+CD25+ regulatory T-cell depleted CD4+ T cells.
2229 16249070 These findings suggested that there is no difference in thymic selection of DR4 restricted GAD-reactive T cells amongst healthy and T1D individuals but GAD65(555-567)-reactive T cells have been preferentially activated in diabetic patients.
2230 16249070 Comparative study of GAD65-specific CD4+ T cells in healthy and type 1 diabetic subjects.
2231 16249070 The prevalence of autoreactive CD4+ T cells towards the immunodominant GAD65(555-567) epitope in DR4 healthy and T1D subjects was investigated with class II tetramers.
2232 16249070 A slightly higher percentage of diabetic subjects had GAD65(555-567) tetramer-positive T cells upon GAD65(555-567) peptide stimulation on the total CD4+ T-cell populations compared to healthy subjects.
2233 16249070 In contrast, three quarters of subjects in both groups had tetramer-positive T cells resulting from stimulation of the CD4+CD25+ regulatory T-cell depleted CD4+ T cells.
2234 16249070 These findings suggested that there is no difference in thymic selection of DR4 restricted GAD-reactive T cells amongst healthy and T1D individuals but GAD65(555-567)-reactive T cells have been preferentially activated in diabetic patients.
2235 16249070 Comparative study of GAD65-specific CD4+ T cells in healthy and type 1 diabetic subjects.
2236 16249070 The prevalence of autoreactive CD4+ T cells towards the immunodominant GAD65(555-567) epitope in DR4 healthy and T1D subjects was investigated with class II tetramers.
2237 16249070 A slightly higher percentage of diabetic subjects had GAD65(555-567) tetramer-positive T cells upon GAD65(555-567) peptide stimulation on the total CD4+ T-cell populations compared to healthy subjects.
2238 16249070 In contrast, three quarters of subjects in both groups had tetramer-positive T cells resulting from stimulation of the CD4+CD25+ regulatory T-cell depleted CD4+ T cells.
2239 16249070 These findings suggested that there is no difference in thymic selection of DR4 restricted GAD-reactive T cells amongst healthy and T1D individuals but GAD65(555-567)-reactive T cells have been preferentially activated in diabetic patients.
2240 16263242 GAD65- and proinsulin-specific CD4+ T-cells detected by MHC class II tetramers in peripheral blood of type 1 diabetes patients and at-risk subjects.
2241 16263242 In this study we have analyzed the prevalence of glutamate decarboxylase 65 (GAD65)- and proinsulin-specific CD4(+) T-cells in type 1 diabetes patients, at-risk subjects and in HLA-matched control children.
2242 16263242 Peripheral blood mononuclear cells were cultured in the presence of two different GAD65 peptides (555-567, 557I and 274-286) or with a proinsulin (B24-C36) peptide for 10-11days.
2243 16263242 Our results show that 11 of 18 (61%) type 1 diabetes patients and 7 of the 20 (35%) at-risk subjects were positive for one of the three GAD65 or proinsulin-containing tetramers, whereas only 2 of 21 (9.5%) controls had tetramer binding cells (p = 0.0007 type 1 diabetes vs. controls and p = 0.0488 at-risk subjects vs. controls, Chi-square test).
2244 16263242 In conclusion, type 1 diabetes patients and at-risk subjects have a significantly higher prevalence of GAD65- and proinsulin-specific CD4(+) T-cells than the control subjects.
2245 16263242 GAD65- and proinsulin-specific CD4+ T-cells detected by MHC class II tetramers in peripheral blood of type 1 diabetes patients and at-risk subjects.
2246 16263242 In this study we have analyzed the prevalence of glutamate decarboxylase 65 (GAD65)- and proinsulin-specific CD4(+) T-cells in type 1 diabetes patients, at-risk subjects and in HLA-matched control children.
2247 16263242 Peripheral blood mononuclear cells were cultured in the presence of two different GAD65 peptides (555-567, 557I and 274-286) or with a proinsulin (B24-C36) peptide for 10-11days.
2248 16263242 Our results show that 11 of 18 (61%) type 1 diabetes patients and 7 of the 20 (35%) at-risk subjects were positive for one of the three GAD65 or proinsulin-containing tetramers, whereas only 2 of 21 (9.5%) controls had tetramer binding cells (p = 0.0007 type 1 diabetes vs. controls and p = 0.0488 at-risk subjects vs. controls, Chi-square test).
2249 16263242 In conclusion, type 1 diabetes patients and at-risk subjects have a significantly higher prevalence of GAD65- and proinsulin-specific CD4(+) T-cells than the control subjects.
2250 16263242 GAD65- and proinsulin-specific CD4+ T-cells detected by MHC class II tetramers in peripheral blood of type 1 diabetes patients and at-risk subjects.
2251 16263242 In this study we have analyzed the prevalence of glutamate decarboxylase 65 (GAD65)- and proinsulin-specific CD4(+) T-cells in type 1 diabetes patients, at-risk subjects and in HLA-matched control children.
2252 16263242 Peripheral blood mononuclear cells were cultured in the presence of two different GAD65 peptides (555-567, 557I and 274-286) or with a proinsulin (B24-C36) peptide for 10-11days.
2253 16263242 Our results show that 11 of 18 (61%) type 1 diabetes patients and 7 of the 20 (35%) at-risk subjects were positive for one of the three GAD65 or proinsulin-containing tetramers, whereas only 2 of 21 (9.5%) controls had tetramer binding cells (p = 0.0007 type 1 diabetes vs. controls and p = 0.0488 at-risk subjects vs. controls, Chi-square test).
2254 16263242 In conclusion, type 1 diabetes patients and at-risk subjects have a significantly higher prevalence of GAD65- and proinsulin-specific CD4(+) T-cells than the control subjects.
2255 16263242 GAD65- and proinsulin-specific CD4+ T-cells detected by MHC class II tetramers in peripheral blood of type 1 diabetes patients and at-risk subjects.
2256 16263242 In this study we have analyzed the prevalence of glutamate decarboxylase 65 (GAD65)- and proinsulin-specific CD4(+) T-cells in type 1 diabetes patients, at-risk subjects and in HLA-matched control children.
2257 16263242 Peripheral blood mononuclear cells were cultured in the presence of two different GAD65 peptides (555-567, 557I and 274-286) or with a proinsulin (B24-C36) peptide for 10-11days.
2258 16263242 Our results show that 11 of 18 (61%) type 1 diabetes patients and 7 of the 20 (35%) at-risk subjects were positive for one of the three GAD65 or proinsulin-containing tetramers, whereas only 2 of 21 (9.5%) controls had tetramer binding cells (p = 0.0007 type 1 diabetes vs. controls and p = 0.0488 at-risk subjects vs. controls, Chi-square test).
2259 16263242 In conclusion, type 1 diabetes patients and at-risk subjects have a significantly higher prevalence of GAD65- and proinsulin-specific CD4(+) T-cells than the control subjects.
2260 16280641 Insulin, glutamic acid decarboxylase, and insulinoma associated-2 autoantibodies (IAA, GAD65, and IA-2) are the autoantibodies that have been associated most clearly with the development of T1D.
2261 16295523 The autoantigens of Type 1A diabetes may be divided into subgroups based on their tissue distributions: Beta-cell-specific antigens like insulin, insulin derivatives, and IGRP (Islet-specific Glucose-6-phosphatase catalytic subunit Related Peptide); neurendocrine antigens such as carboxypeptidase H, insulinoma-associated antigen (IA-2), glutamic acid decarboxylase (GAD65), and carboxypeptidase E; and those expressed ubiquitously like heat shock protein 60 (a putative autoantigen for type 1 diabetes).
2262 16301686 Analysis of GAD65 autoantibodies in Stiff-Person syndrome patients.
2263 16301686 Autoantibodies to the 65-kDa isoform of glutamate decarboxylase GAD65 (GAD65Ab) are strong candidates for a pathological role in Stiff-Person syndrome (SPS).
2264 16301686 Analysis of GAD65 autoantibodies in Stiff-Person syndrome patients.
2265 16301686 Autoantibodies to the 65-kDa isoform of glutamate decarboxylase GAD65 (GAD65Ab) are strong candidates for a pathological role in Stiff-Person syndrome (SPS).
2266 16380228 Insulin, GAD65, and IA-2 autoantibodies and leptin levels were measured in relatives of T1DM patients and in control subjects.
2267 16380476 Coexpression of CD25 and OX40 (CD134) receptors delineates autoreactive T-cells in type 1 diabetes.
2268 16380476 We used fluorescence-activated cell sorter analysis to study surface marker expression on T-cell lines specific for two major type 1 diabetes autoantigens, GAD65 and proinsulin.
2269 16380476 The autoreactive T-cells of patients could be distinguished from those of control subjects by their coexpression of CD25 and CD134.
2270 16380476 Autoantigen-specific T-cells that recognized multiple GAD65- and preproinsulin-derived peptides and coexpressed CD25(+)CD134(+) were confined to patients (n = 32) and pre-diabetic probands (n = 5).
2271 16380476 Autoantigen-reactive T-cells in control subjects (n = 21) were CD25(+)CD134(-) and recognized fewer autoantigen-derived peptides.
2272 16380476 Insulin therapy did not induce CD25(+)CD134(+) T-cells in type 2 diabetic patients.
2273 16380476 Coexpression of CD25 and OX40 (CD134) receptors delineates autoreactive T-cells in type 1 diabetes.
2274 16380476 We used fluorescence-activated cell sorter analysis to study surface marker expression on T-cell lines specific for two major type 1 diabetes autoantigens, GAD65 and proinsulin.
2275 16380476 The autoreactive T-cells of patients could be distinguished from those of control subjects by their coexpression of CD25 and CD134.
2276 16380476 Autoantigen-specific T-cells that recognized multiple GAD65- and preproinsulin-derived peptides and coexpressed CD25(+)CD134(+) were confined to patients (n = 32) and pre-diabetic probands (n = 5).
2277 16380476 Autoantigen-reactive T-cells in control subjects (n = 21) were CD25(+)CD134(-) and recognized fewer autoantigen-derived peptides.
2278 16380476 Insulin therapy did not induce CD25(+)CD134(+) T-cells in type 2 diabetic patients.
2279 16390386 Serum obtained at the time of enrollment was assayed for ICAs, glutamic acid decarboxylase (GAD)65, insulin A (IA)-2 AA, and insulin AAs (IAAs).
2280 16390386 In FDRs who had ICAs in addition to GAD65 and IA-2 AAs, the cumulative risk of developing insulin-requiring diabetes was 80% at 6.7 yr of follow-up, whereas this risk in those with GAD65 and IA-2 AAs without ICAs was only 14% at 10 yr of follow-up (log rank: P < 0.00001).
2281 16390386 Cox regression analysis showed that diabetes risk was significantly associated with the presence of ICAs in both subjects with low titer and high titer GAD65 and IA-2 AAs.
2282 16390386 The addition of IAAs in GAD65 and IA-2 AA-positive relatives did not increase the cumulative risk for conversion to insulin-treated diabetes.
2283 16390386 We provide evidence that a subgroup of ICAs predicts a more rapid progression to insulin-requiring diabetes in GAD65 and IA-2 AA-positive relatives and should remain part of the assessment of T1DM risk for intervention trials.
2284 16390386 Serum obtained at the time of enrollment was assayed for ICAs, glutamic acid decarboxylase (GAD)65, insulin A (IA)-2 AA, and insulin AAs (IAAs).
2285 16390386 In FDRs who had ICAs in addition to GAD65 and IA-2 AAs, the cumulative risk of developing insulin-requiring diabetes was 80% at 6.7 yr of follow-up, whereas this risk in those with GAD65 and IA-2 AAs without ICAs was only 14% at 10 yr of follow-up (log rank: P < 0.00001).
2286 16390386 Cox regression analysis showed that diabetes risk was significantly associated with the presence of ICAs in both subjects with low titer and high titer GAD65 and IA-2 AAs.
2287 16390386 The addition of IAAs in GAD65 and IA-2 AA-positive relatives did not increase the cumulative risk for conversion to insulin-treated diabetes.
2288 16390386 We provide evidence that a subgroup of ICAs predicts a more rapid progression to insulin-requiring diabetes in GAD65 and IA-2 AA-positive relatives and should remain part of the assessment of T1DM risk for intervention trials.
2289 16390386 Serum obtained at the time of enrollment was assayed for ICAs, glutamic acid decarboxylase (GAD)65, insulin A (IA)-2 AA, and insulin AAs (IAAs).
2290 16390386 In FDRs who had ICAs in addition to GAD65 and IA-2 AAs, the cumulative risk of developing insulin-requiring diabetes was 80% at 6.7 yr of follow-up, whereas this risk in those with GAD65 and IA-2 AAs without ICAs was only 14% at 10 yr of follow-up (log rank: P < 0.00001).
2291 16390386 Cox regression analysis showed that diabetes risk was significantly associated with the presence of ICAs in both subjects with low titer and high titer GAD65 and IA-2 AAs.
2292 16390386 The addition of IAAs in GAD65 and IA-2 AA-positive relatives did not increase the cumulative risk for conversion to insulin-treated diabetes.
2293 16390386 We provide evidence that a subgroup of ICAs predicts a more rapid progression to insulin-requiring diabetes in GAD65 and IA-2 AA-positive relatives and should remain part of the assessment of T1DM risk for intervention trials.
2294 16390386 Serum obtained at the time of enrollment was assayed for ICAs, glutamic acid decarboxylase (GAD)65, insulin A (IA)-2 AA, and insulin AAs (IAAs).
2295 16390386 In FDRs who had ICAs in addition to GAD65 and IA-2 AAs, the cumulative risk of developing insulin-requiring diabetes was 80% at 6.7 yr of follow-up, whereas this risk in those with GAD65 and IA-2 AAs without ICAs was only 14% at 10 yr of follow-up (log rank: P < 0.00001).
2296 16390386 Cox regression analysis showed that diabetes risk was significantly associated with the presence of ICAs in both subjects with low titer and high titer GAD65 and IA-2 AAs.
2297 16390386 The addition of IAAs in GAD65 and IA-2 AA-positive relatives did not increase the cumulative risk for conversion to insulin-treated diabetes.
2298 16390386 We provide evidence that a subgroup of ICAs predicts a more rapid progression to insulin-requiring diabetes in GAD65 and IA-2 AA-positive relatives and should remain part of the assessment of T1DM risk for intervention trials.
2299 16442659 Higher prevalence of autoantibodies to insulin and GAD65 in Swedish compared to Lithuanian children with type 1 diabetes.
2300 16442659 We analyzed autoantibodies to insulin (IAA), glutamic acid decarboxylase (GADA) and the protein tyrosine phosphatase like IA-2 (IA-2A) as well as risk-associated polymorphisms of HLA, insulin and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) genes.
2301 16442659 The differences remained even when the patients were matched for HLA, insulin and CTLA-4 risk genotypes.
2302 16442659 Our results suggest that autoimmune process against insulin and GAD(65) is more common at diagnosis in children in areas with high incidence of type 1 diabetes (T1D), independent of genetic risk markers.
2303 16442659 Higher prevalence of autoantibodies to insulin and GAD65 in Swedish compared to Lithuanian children with type 1 diabetes.
2304 16442659 We analyzed autoantibodies to insulin (IAA), glutamic acid decarboxylase (GADA) and the protein tyrosine phosphatase like IA-2 (IA-2A) as well as risk-associated polymorphisms of HLA, insulin and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) genes.
2305 16442659 The differences remained even when the patients were matched for HLA, insulin and CTLA-4 risk genotypes.
2306 16442659 Our results suggest that autoimmune process against insulin and GAD(65) is more common at diagnosis in children in areas with high incidence of type 1 diabetes (T1D), independent of genetic risk markers.
2307 16461938 Since the role that GABA plays in the islet and the mechanisms whereby the two major GAD isoforms (GAD65 and GAD67) function as diabetes-associated autoantigens are unknown, continued characterization of the islet GAD-GABA system is important.
2308 16461938 V52 may be better adapted than V57 to the unique rat alpha cell GAD-GABA system, which lacks GAD65 and in which VIAAT traffics to secretory granules rather than just to synaptic microvesicles.
2309 16461938 Since the role that GABA plays in the islet and the mechanisms whereby the two major GAD isoforms (GAD65 and GAD67) function as diabetes-associated autoantigens are unknown, continued characterization of the islet GAD-GABA system is important.
2310 16461938 V52 may be better adapted than V57 to the unique rat alpha cell GAD-GABA system, which lacks GAD65 and in which VIAAT traffics to secretory granules rather than just to synaptic microvesicles.
2311 16573556 Glutamate decarboxylase (GAD), which has two isoforms, GAD65, and GAD67, is responsible for synthesis of the major inhibitory neurotransmitter, gamma-aminobutyric acid.
2312 16573556 Almost all GFP-positive cells were positive for major histocompatibility complex (MHC) class II antigen staining and were positive for both cytokeratin and Ulex Europaeus Agglutinin I, markers of medullary thymic epithelial cells, but were negative for CD11c, Gr-1, and CD45, markers of dendritic cells, macrophages, and B-lymphocytes, respectively.
2313 16704296 Using the sensitive enzyme-linked immunospot (ELISPOT) technique to distinguish Th1-like from Th2-like lymphocytes, secretion of interferon-gamma (IFN-gamma) and interleukin-4 (IL-4) was analyzed from PBMCs spontaneously and after in vitro stimulation with the diabetes-associated autoantigens, glutamic acid decarboxylase 65 (GAD65, protein and peptide, aa 247-279), recombinant tyrosine phosphatase (IA-2), and heat shock protein (HSP, aa 437-460).
2314 16704296 Secretion of IFN-gamma and the IFN-gamma/IL-4 ratio, induced by autoantigens, decreased in individuals developing T1D (p < 0.05), whereas nondiabetic individuals showed an increased IL-4 response (p < 0.05).
2315 16790365 However, in this study, we demonstrate protection against disease by covaccination with a mutant B7-1 molecule (B7-1wa) that binds the negative T cell regulator CTLA-4 (CD152), but not CD28.
2316 16790365 In vitro, the T cells of covaccinated mice had negative responses to both insulin and GAD65, and this was restored by adding blocking antibodies to transforming growth factor beta1 (TGF-beta1), suggesting a role for this cytokine.
2317 16790365 Furthermore, vaccinated mice had increased numbers of T cells with Tr-associated markers, such as CTLA-4, Foxp3, and membrane-bound TGF-beta1.
2318 16972881 Autoantibodies to glutamic acid decarboxylase (GAD65) have been reported in sera from the Cln3(-/-) mouse model of juvenile neuronal ceroid lipofuscinosis (JNCL), and in individuals with this fatal paediatric neurodegenerative disorder.
2319 16972881 To investigate the existence of other circulating autoreactive antibodies, we used sera from patients with JNCL and other forms of neuronal ceroid lipofuscinosis (NCL) as primary antisera to stain rat and human central nervous system sections.
2320 16972881 JNCL sera displayed characteristic patterns of IgG, but not IgA, IgE or IgM immunoreactivity that was distinct from the other forms of NCL.
2321 16972881 Moreover, sera from Stiff Person Syndrome and Type I Diabetes, disorders in which GAD65 autoantibodies are present, stained with profiles that were markedly different from JNCL sera.
2322 16972881 Collectively, these studies provide evidence of the presence of autoreactive antibodies within multiple forms of NCL, and are not exclusively directed towards GAD65.
2323 16972881 Autoantibodies to glutamic acid decarboxylase (GAD65) have been reported in sera from the Cln3(-/-) mouse model of juvenile neuronal ceroid lipofuscinosis (JNCL), and in individuals with this fatal paediatric neurodegenerative disorder.
2324 16972881 To investigate the existence of other circulating autoreactive antibodies, we used sera from patients with JNCL and other forms of neuronal ceroid lipofuscinosis (NCL) as primary antisera to stain rat and human central nervous system sections.
2325 16972881 JNCL sera displayed characteristic patterns of IgG, but not IgA, IgE or IgM immunoreactivity that was distinct from the other forms of NCL.
2326 16972881 Moreover, sera from Stiff Person Syndrome and Type I Diabetes, disorders in which GAD65 autoantibodies are present, stained with profiles that were markedly different from JNCL sera.
2327 16972881 Collectively, these studies provide evidence of the presence of autoreactive antibodies within multiple forms of NCL, and are not exclusively directed towards GAD65.
2328 16972881 Autoantibodies to glutamic acid decarboxylase (GAD65) have been reported in sera from the Cln3(-/-) mouse model of juvenile neuronal ceroid lipofuscinosis (JNCL), and in individuals with this fatal paediatric neurodegenerative disorder.
2329 16972881 To investigate the existence of other circulating autoreactive antibodies, we used sera from patients with JNCL and other forms of neuronal ceroid lipofuscinosis (NCL) as primary antisera to stain rat and human central nervous system sections.
2330 16972881 JNCL sera displayed characteristic patterns of IgG, but not IgA, IgE or IgM immunoreactivity that was distinct from the other forms of NCL.
2331 16972881 Moreover, sera from Stiff Person Syndrome and Type I Diabetes, disorders in which GAD65 autoantibodies are present, stained with profiles that were markedly different from JNCL sera.
2332 16972881 Collectively, these studies provide evidence of the presence of autoreactive antibodies within multiple forms of NCL, and are not exclusively directed towards GAD65.
2333 16979383 We have identified for the first time an age-dependent spontaneous loss of tolerance to two self-antigenic epitopes derived from putative diabetes-associated antigens glutamic acid decarboxylase (GAD65) and glial fibrillary acidic protein (GFAP) in RIP-B7/DRB1*0404 HLA transgenic mice.
2334 16979383 Diabetic and older non-diabetic mice exhibited a proliferative response to an immunodominant epitope from GAD65 (555-567) and also from GFAP (240-252) but not from an immunogenic epitope from diabetes-associated islet-specific glucose-6-phosphatase catalytic subunit-related protein.
2335 16979383 Islet infiltrates in older non-diabetic mice and diabetic mice contain CD4(+)/FoxP3(+) cells and suggest the presence of a regulatory mechanism prior and during diabetic disease.
2336 16979383 We have identified for the first time an age-dependent spontaneous loss of tolerance to two self-antigenic epitopes derived from putative diabetes-associated antigens glutamic acid decarboxylase (GAD65) and glial fibrillary acidic protein (GFAP) in RIP-B7/DRB1*0404 HLA transgenic mice.
2337 16979383 Diabetic and older non-diabetic mice exhibited a proliferative response to an immunodominant epitope from GAD65 (555-567) and also from GFAP (240-252) but not from an immunogenic epitope from diabetes-associated islet-specific glucose-6-phosphatase catalytic subunit-related protein.
2338 16979383 Islet infiltrates in older non-diabetic mice and diabetic mice contain CD4(+)/FoxP3(+) cells and suggest the presence of a regulatory mechanism prior and during diabetic disease.
2339 17130492 A panel of human GAD (hGAD65)-specific CD4 T-cell lines and hybridomas was generated to serve as detection reagents for evaluating the peptide occupancy of DQ8 and DR4.
2340 17130547 Diabetes incidence in recipients of unpulsed iDC was comparable to unmanipulated animals ( approximately 80%), whereas GAD65(78-97) pulsed iDC recipients were protected from the disease (P = 0.05).
2341 17130557 Most T1D patients' sera contain two distinct glutamic acid decarboxylase (GAD) antibody specificities, of which one targets an epitope region in the middle-third of GAD65 (amino acids 221-359) and the other targets the carboxy-third of GAD65 (amino acids 453-569).
2342 17130557 Using five chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of antibodies from 127 T1D patients with and without autoimmune thyroid diseases (ATD).
2343 17130557 Those with GAD65 autoantibodies reacting with both middle- and carboxy-third had less ATD.
2344 17130557 Of 22 (23%) patients with ATD, 5 compared to 29 of 47 (62%) T1D patients without ATD had GAD65 autoantibodies reacting with both middle- and carboxy-third (relative risk = 0.2, P < 0.01).
2345 17130557 These results indicate that there are both similarities and differences in the humoral response to GAD65 in ATD and T1D, and expression of antibodies to middle- and carboxy-third at the same time is a feature specific to T1D.
2346 17130557 Most T1D patients' sera contain two distinct glutamic acid decarboxylase (GAD) antibody specificities, of which one targets an epitope region in the middle-third of GAD65 (amino acids 221-359) and the other targets the carboxy-third of GAD65 (amino acids 453-569).
2347 17130557 Using five chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of antibodies from 127 T1D patients with and without autoimmune thyroid diseases (ATD).
2348 17130557 Those with GAD65 autoantibodies reacting with both middle- and carboxy-third had less ATD.
2349 17130557 Of 22 (23%) patients with ATD, 5 compared to 29 of 47 (62%) T1D patients without ATD had GAD65 autoantibodies reacting with both middle- and carboxy-third (relative risk = 0.2, P < 0.01).
2350 17130557 These results indicate that there are both similarities and differences in the humoral response to GAD65 in ATD and T1D, and expression of antibodies to middle- and carboxy-third at the same time is a feature specific to T1D.
2351 17130557 Most T1D patients' sera contain two distinct glutamic acid decarboxylase (GAD) antibody specificities, of which one targets an epitope region in the middle-third of GAD65 (amino acids 221-359) and the other targets the carboxy-third of GAD65 (amino acids 453-569).
2352 17130557 Using five chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of antibodies from 127 T1D patients with and without autoimmune thyroid diseases (ATD).
2353 17130557 Those with GAD65 autoantibodies reacting with both middle- and carboxy-third had less ATD.
2354 17130557 Of 22 (23%) patients with ATD, 5 compared to 29 of 47 (62%) T1D patients without ATD had GAD65 autoantibodies reacting with both middle- and carboxy-third (relative risk = 0.2, P < 0.01).
2355 17130557 These results indicate that there are both similarities and differences in the humoral response to GAD65 in ATD and T1D, and expression of antibodies to middle- and carboxy-third at the same time is a feature specific to T1D.
2356 17130557 Most T1D patients' sera contain two distinct glutamic acid decarboxylase (GAD) antibody specificities, of which one targets an epitope region in the middle-third of GAD65 (amino acids 221-359) and the other targets the carboxy-third of GAD65 (amino acids 453-569).
2357 17130557 Using five chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of antibodies from 127 T1D patients with and without autoimmune thyroid diseases (ATD).
2358 17130557 Those with GAD65 autoantibodies reacting with both middle- and carboxy-third had less ATD.
2359 17130557 Of 22 (23%) patients with ATD, 5 compared to 29 of 47 (62%) T1D patients without ATD had GAD65 autoantibodies reacting with both middle- and carboxy-third (relative risk = 0.2, P < 0.01).
2360 17130557 These results indicate that there are both similarities and differences in the humoral response to GAD65 in ATD and T1D, and expression of antibodies to middle- and carboxy-third at the same time is a feature specific to T1D.
2361 17130557 Most T1D patients' sera contain two distinct glutamic acid decarboxylase (GAD) antibody specificities, of which one targets an epitope region in the middle-third of GAD65 (amino acids 221-359) and the other targets the carboxy-third of GAD65 (amino acids 453-569).
2362 17130557 Using five chimeric GAD65/GAD67 proteins to maintain conformation-dependent epitopes of GAD65, we compared the humoral repertoire of antibodies from 127 T1D patients with and without autoimmune thyroid diseases (ATD).
2363 17130557 Those with GAD65 autoantibodies reacting with both middle- and carboxy-third had less ATD.
2364 17130557 Of 22 (23%) patients with ATD, 5 compared to 29 of 47 (62%) T1D patients without ATD had GAD65 autoantibodies reacting with both middle- and carboxy-third (relative risk = 0.2, P < 0.01).
2365 17130557 These results indicate that there are both similarities and differences in the humoral response to GAD65 in ATD and T1D, and expression of antibodies to middle- and carboxy-third at the same time is a feature specific to T1D.
2366 17130560 MHC class I chain-related gene-A is associated with IA2 and IAA but not GAD in Swedish type 1 diabetes mellitus.
2367 17130560 In type 1 diabetes mellitus (T1DM), the frequency of antibodies against insulin (IAA), glutamic acid decarboxylase-65 (GAD65), ICA512/IA2 (IA2), and islet cell antigens (ICA) vary with human leukocyte antigen (HLA) composition of the patient.
2368 17130560 IAA, IA2 autoantibodies, and ICA are increased in DQ8 positives; GAD65 antibodies are increased in DQ2 positives.
2369 17130560 MHC class I chain-related gene-A (MICA) is another genetic marker that has been proposed to be associated with T1DM.
2370 17130560 In this article, we looked at microsatellite polymorphism of MICA and its association with autoantibodies (IAA, IA2, and GAD65) in Swedish T1DM patients and if the association explains its importance in early events in autoimmune response.
2371 17130560 MHC class I chain-related gene-A is associated with IA2 and IAA but not GAD in Swedish type 1 diabetes mellitus.
2372 17130560 In type 1 diabetes mellitus (T1DM), the frequency of antibodies against insulin (IAA), glutamic acid decarboxylase-65 (GAD65), ICA512/IA2 (IA2), and islet cell antigens (ICA) vary with human leukocyte antigen (HLA) composition of the patient.
2373 17130560 IAA, IA2 autoantibodies, and ICA are increased in DQ8 positives; GAD65 antibodies are increased in DQ2 positives.
2374 17130560 MHC class I chain-related gene-A (MICA) is another genetic marker that has been proposed to be associated with T1DM.
2375 17130560 In this article, we looked at microsatellite polymorphism of MICA and its association with autoantibodies (IAA, IA2, and GAD65) in Swedish T1DM patients and if the association explains its importance in early events in autoimmune response.
2376 17130560 MHC class I chain-related gene-A is associated with IA2 and IAA but not GAD in Swedish type 1 diabetes mellitus.
2377 17130560 In type 1 diabetes mellitus (T1DM), the frequency of antibodies against insulin (IAA), glutamic acid decarboxylase-65 (GAD65), ICA512/IA2 (IA2), and islet cell antigens (ICA) vary with human leukocyte antigen (HLA) composition of the patient.
2378 17130560 IAA, IA2 autoantibodies, and ICA are increased in DQ8 positives; GAD65 antibodies are increased in DQ2 positives.
2379 17130560 MHC class I chain-related gene-A (MICA) is another genetic marker that has been proposed to be associated with T1DM.
2380 17130560 In this article, we looked at microsatellite polymorphism of MICA and its association with autoantibodies (IAA, IA2, and GAD65) in Swedish T1DM patients and if the association explains its importance in early events in autoimmune response.
2381 17163450 CD8+ suppressor-mediated regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65.
2382 17163450 It has been well demonstrated that CD4+ CD25+ regulatory T cells play a significant role in controlling the expansion of autoreactive T cells in the periphery.
2383 17163450 However, some healthy individuals exhibit measurable responses to self peptide even in the presence of CD4+ CD25+ regulatory cells.
2384 17163450 This article describes the regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65 (GAD65), an autoantigen implicated in type-1 diabetes, by autologous CD8+ suppressor T cells.
2385 17163450 In cells cultured from healthy individuals, the inclusion of autologous CD8+ T cells at physiological levels resulted in a dramatic decrease in the magnitude of in vitro CD4+ T cell responses to GAD65 peptide.
2386 17163450 Cell fractionation studies suggested that CD8+ suppressor T cells originate from the CD45RA+ CD27- population.
2387 17163450 The suppression of CD4+ T cell responses to GAD65 in healthy individuals raises the possibility that CD8+ suppressor T cells play an important role in controlling potentially autoreactive T cells in the general population.
2388 17163450 CD8+ suppressor-mediated regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65.
2389 17163450 It has been well demonstrated that CD4+ CD25+ regulatory T cells play a significant role in controlling the expansion of autoreactive T cells in the periphery.
2390 17163450 However, some healthy individuals exhibit measurable responses to self peptide even in the presence of CD4+ CD25+ regulatory cells.
2391 17163450 This article describes the regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65 (GAD65), an autoantigen implicated in type-1 diabetes, by autologous CD8+ suppressor T cells.
2392 17163450 In cells cultured from healthy individuals, the inclusion of autologous CD8+ T cells at physiological levels resulted in a dramatic decrease in the magnitude of in vitro CD4+ T cell responses to GAD65 peptide.
2393 17163450 Cell fractionation studies suggested that CD8+ suppressor T cells originate from the CD45RA+ CD27- population.
2394 17163450 The suppression of CD4+ T cell responses to GAD65 in healthy individuals raises the possibility that CD8+ suppressor T cells play an important role in controlling potentially autoreactive T cells in the general population.
2395 17163450 CD8+ suppressor-mediated regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65.
2396 17163450 It has been well demonstrated that CD4+ CD25+ regulatory T cells play a significant role in controlling the expansion of autoreactive T cells in the periphery.
2397 17163450 However, some healthy individuals exhibit measurable responses to self peptide even in the presence of CD4+ CD25+ regulatory cells.
2398 17163450 This article describes the regulation of human CD4+ T cell responses to glutamic acid decarboxylase 65 (GAD65), an autoantigen implicated in type-1 diabetes, by autologous CD8+ suppressor T cells.
2399 17163450 In cells cultured from healthy individuals, the inclusion of autologous CD8+ T cells at physiological levels resulted in a dramatic decrease in the magnitude of in vitro CD4+ T cell responses to GAD65 peptide.
2400 17163450 Cell fractionation studies suggested that CD8+ suppressor T cells originate from the CD45RA+ CD27- population.
2401 17163450 The suppression of CD4+ T cell responses to GAD65 in healthy individuals raises the possibility that CD8+ suppressor T cells play an important role in controlling potentially autoreactive T cells in the general population.
2402 17210161 The obtained time-resolved fluorescence (TRF) is directly proportional to the concentration of GAD65 over a large measuring range (0.1 to >100 ng/mL).
2403 17259239 Time-resolved immunofluorometric dual-label assay for simultaneous detection of autoantibodies to GAD65 and IA-2 in children with type 1 diabetes.
2404 17317763 To define the parameters influencing the efficacy of antigen-specific immunotherapy once diabetes is established, plasmid DNA (pDNA) vaccination was used to suppress autoimmune-mediated destruction of syngeneic islet grafts in diabetic NOD recipients. pDNAs encoding a glutamic acid decarboxylase 65 (GAD65)-Ig molecule (pGAD65), interleukin (IL)-4 (pIL4), and IL-10 (pIL10) significantly delayed the onset of recurrent diabetes compared with pGAD65+pIL10-vaccinated recipients.
2405 17317763 Despite differences in efficacy, a similar frequency of GAD65-specific CD4(+) T-cells secreting IL-4, IL-10, or interferon-gamma were detected in mice treated with pGAD65+pIL4+pIL10 and pGAD65+pIL10.
2406 17317763 However, the frequency of FoxP3-expressing CD4(+)CD25(+)CD62L(hi) T-cells was increased in the renal and pancreatic lymph nodes of diabetic recipients vaccinated with pGAD65+pIL4+pIL10.
2407 17317763 These immunoregulatory CD4(+)CD25(+) T-cells (CD4(+)CD25(+) Treg) exhibited enhanced in vivo and in vitro suppressor activity that partially was transforming growth factor-beta dependent.
2408 17317763 Furthermore, duration of islet graft protection in pGAD65+pIL4+pIL10-vaccinated diabetic recipients correlated with the persistence of CD4(+)CD25(+) Treg.
2409 17317763 These data demonstrate that the frequency and maintenance of FoxP3-expressing CD4(+)CD25(+) Treg influence antigen-induced suppression of ongoing beta-cell autoimmunity in diabetic recipients.
2410 17317763 To define the parameters influencing the efficacy of antigen-specific immunotherapy once diabetes is established, plasmid DNA (pDNA) vaccination was used to suppress autoimmune-mediated destruction of syngeneic islet grafts in diabetic NOD recipients. pDNAs encoding a glutamic acid decarboxylase 65 (GAD65)-Ig molecule (pGAD65), interleukin (IL)-4 (pIL4), and IL-10 (pIL10) significantly delayed the onset of recurrent diabetes compared with pGAD65+pIL10-vaccinated recipients.
2411 17317763 Despite differences in efficacy, a similar frequency of GAD65-specific CD4(+) T-cells secreting IL-4, IL-10, or interferon-gamma were detected in mice treated with pGAD65+pIL4+pIL10 and pGAD65+pIL10.
2412 17317763 However, the frequency of FoxP3-expressing CD4(+)CD25(+)CD62L(hi) T-cells was increased in the renal and pancreatic lymph nodes of diabetic recipients vaccinated with pGAD65+pIL4+pIL10.
2413 17317763 These immunoregulatory CD4(+)CD25(+) T-cells (CD4(+)CD25(+) Treg) exhibited enhanced in vivo and in vitro suppressor activity that partially was transforming growth factor-beta dependent.
2414 17317763 Furthermore, duration of islet graft protection in pGAD65+pIL4+pIL10-vaccinated diabetic recipients correlated with the persistence of CD4(+)CD25(+) Treg.
2415 17317763 These data demonstrate that the frequency and maintenance of FoxP3-expressing CD4(+)CD25(+) Treg influence antigen-induced suppression of ongoing beta-cell autoimmunity in diabetic recipients.
2416 17376837 Glutamic acid decarboxylase (GAD65) and insulin are implicated as target antigens in the pathogenesis of human diabetes through correlative measurements of humoral and cellular reactivity to them in diabetics and at-risk diabetic individuals.
2417 17479437 Glutamate cysteine ligase catalytic subunit promoter polymorphisms and associations with type 1 diabetes age-at-onset and GAD65 autoantibody levels.
2418 17479437 T1D patients and control subjects from the Swedish Childhood Diabetes Registry and the Swedish Diabetes Incidence Study registry were genotyped for two GCLC promoter polymorphisms; the GCLC -129 C to T single nucleotide polymorphism (GCLC -129 SNP) and the GCLC GAG trinucleotide repeat polymorphism (GCLC TNR).
2419 17479437 In addition, T1D patients with an age-at-onset of 14-35 years possess the GCLC TNR 7/8 genotype at a lower frequency than the control subjects (OR, 0.33, 95% CI, 0.13-0.82).
2420 17479437 The GCLC -129 SNP and GCLC TNR appear to be in linkage disequilibrium (p-value<0.0001).
2421 17558682 She was diagnosed with: (1) type 1 diabetes, with hyperglycemia, impaired insulin secretion, and positive autoantibodies for GAD-65 and IA-2; (2) autoimmune thyroiditis, with hypothyroidism, positive anti-microsomal and antithyroglobulin antibodies; and (3) PCOS, with hyperandrogenic signs that had developed 5 years earlier, amenorrhea for the previous 6 months, and characteristic multiple microcystic appearance of both ovaries on ultrasonography.
2422 17666094 The use of biotin-conjugated antibodies and streptavidin Sepharose are used commonly in immunoprecipitation assays (IPA) based on (125)I- or (35)S-labelled antigens to capture IgG subclasses directed against IA-2 or GAD(65).
2423 17947651 In this study, a CSFE dilution assay was used to detect glutamic acid decarboxylase 65 (GAD65)- and insulin-responsive T cells and HLA-0201*-GAD65(114-122) pentamers were used to detect CD8(+) GAD-responsive T cells in memory CD45RO(+) and naive CD45RO(-) cell populations from patients with type 1 diabetes and healthy control subjects.
2424 17947651 CD4(+) and CD8(+) T cells specific for GAD65 and insulin were present in patients with type 1 diabetes and control subjects.
2425 17947651 Within the naive CD45RO(-) cells, CD4(+) and CD8(+) T cell responses were similar between patients and controls.
2426 17947651 Within the memory CD45RO(+) cells, CD4(+) T cell responses against whole GAD65 and insulin and HLA-0201*-GAD65(114-122) pentamer-positive CD8(+) T cells were found in patients with type 1 diabetes, but not in control subjects (p < 0.05 for all).
2427 17947651 In this study, a CSFE dilution assay was used to detect glutamic acid decarboxylase 65 (GAD65)- and insulin-responsive T cells and HLA-0201*-GAD65(114-122) pentamers were used to detect CD8(+) GAD-responsive T cells in memory CD45RO(+) and naive CD45RO(-) cell populations from patients with type 1 diabetes and healthy control subjects.
2428 17947651 CD4(+) and CD8(+) T cells specific for GAD65 and insulin were present in patients with type 1 diabetes and control subjects.
2429 17947651 Within the naive CD45RO(-) cells, CD4(+) and CD8(+) T cell responses were similar between patients and controls.
2430 17947651 Within the memory CD45RO(+) cells, CD4(+) T cell responses against whole GAD65 and insulin and HLA-0201*-GAD65(114-122) pentamer-positive CD8(+) T cells were found in patients with type 1 diabetes, but not in control subjects (p < 0.05 for all).
2431 17949947 The source of TcR was a CD4(+) T(H)1(+) T-cell clone which responded to an immunodominant epitope of the human islet protein GAD65, an epitope shared with both GAD65 and GAD67 in the mouse.
2432 17949947 The resulting HLA-DR4/GAD-TcR transgenic mice on a Rag2(o/o)/I-Ab(o/o)/B6 background exhibited a CD4(+) infiltrate into pancreatic islets that correlated with a loss of insulin in infiltrated islets.
2433 17949947 T cells containing the GAD65/67 (555-567) responsive TcR undergo strong negative selection as evidenced by a 10-fold lower thymocyte cellularity compared to non-TcR transgenic mice, and clonotype peripheral T cells represented approximately 1% of CD4(+) T cells in Rag2 sufficient mice.
2434 17949947 Upon in vitro stimulation, GAD65/67 555-567 responsive T cells secrete interferon-gamma, minimal interleukin (IL)-2 and tumor necrosis factor-alpha, and no IL-4, IL-5, IL-10, or IL-17, consistent with a T(H)1 profile.
2435 17949947 These data demonstrate that CD4(+) T cells specific for a naturally processed epitope within GAD can specifically home to pancreatic islets and lead to impaired islet beta-cell function in diabetes-associated HLA-DR4 transgenic mice on the relatively non-autoimmune C57BL/6 background.
2436 17949947 The source of TcR was a CD4(+) T(H)1(+) T-cell clone which responded to an immunodominant epitope of the human islet protein GAD65, an epitope shared with both GAD65 and GAD67 in the mouse.
2437 17949947 The resulting HLA-DR4/GAD-TcR transgenic mice on a Rag2(o/o)/I-Ab(o/o)/B6 background exhibited a CD4(+) infiltrate into pancreatic islets that correlated with a loss of insulin in infiltrated islets.
2438 17949947 T cells containing the GAD65/67 (555-567) responsive TcR undergo strong negative selection as evidenced by a 10-fold lower thymocyte cellularity compared to non-TcR transgenic mice, and clonotype peripheral T cells represented approximately 1% of CD4(+) T cells in Rag2 sufficient mice.
2439 17949947 Upon in vitro stimulation, GAD65/67 555-567 responsive T cells secrete interferon-gamma, minimal interleukin (IL)-2 and tumor necrosis factor-alpha, and no IL-4, IL-5, IL-10, or IL-17, consistent with a T(H)1 profile.
2440 17949947 These data demonstrate that CD4(+) T cells specific for a naturally processed epitope within GAD can specifically home to pancreatic islets and lead to impaired islet beta-cell function in diabetes-associated HLA-DR4 transgenic mice on the relatively non-autoimmune C57BL/6 background.
2441 17949947 The source of TcR was a CD4(+) T(H)1(+) T-cell clone which responded to an immunodominant epitope of the human islet protein GAD65, an epitope shared with both GAD65 and GAD67 in the mouse.
2442 17949947 The resulting HLA-DR4/GAD-TcR transgenic mice on a Rag2(o/o)/I-Ab(o/o)/B6 background exhibited a CD4(+) infiltrate into pancreatic islets that correlated with a loss of insulin in infiltrated islets.
2443 17949947 T cells containing the GAD65/67 (555-567) responsive TcR undergo strong negative selection as evidenced by a 10-fold lower thymocyte cellularity compared to non-TcR transgenic mice, and clonotype peripheral T cells represented approximately 1% of CD4(+) T cells in Rag2 sufficient mice.
2444 17949947 Upon in vitro stimulation, GAD65/67 555-567 responsive T cells secrete interferon-gamma, minimal interleukin (IL)-2 and tumor necrosis factor-alpha, and no IL-4, IL-5, IL-10, or IL-17, consistent with a T(H)1 profile.
2445 17949947 These data demonstrate that CD4(+) T cells specific for a naturally processed epitope within GAD can specifically home to pancreatic islets and lead to impaired islet beta-cell function in diabetes-associated HLA-DR4 transgenic mice on the relatively non-autoimmune C57BL/6 background.
2446 17950950 Autoantibodies to GAD65 or IA-2 were negative throughout the clinical course in two cases, but transiently positive in one case.
2447 18300057 The two possibilities to explain the pathogenic basis of stiff-person syndrome (SPS) are intrathecal sensitization of GAD65-reactive CD4+T cells and synthesis of GAD65-specific autoantibodies within the CNS [Rakocevic et al., Arch.
2448 18514483 Conformational epitopes of GAD65 have been mapped using human monoclonal antibodies to GAD65 and GAD mutated by GAD65/67 sequence exchanges or point mutations, but these studies have been limited by a lack of structural information.
2449 18549445 The proposed cytotoxic lymphocyte antigen 4 (CTLA-4) involvement, together with forkhead box P3 (FoxP3) and transforming growth factor (TGF)-beta are associated with regulatory T cell activity.
2450 18549445 CTLA-4, sCTLA-4, FoxP3 and TGF-beta mRNA transcription was quantified.
2451 18549445 Placebo individuals increased in spontaneous CTLA-4 mRNA (P < 0.05) but decreased in expression after stimulation with GAD(65)-peptide (P < 0.05) and PHA (P < 0.05).
2452 18549445 Spontaneous TGF-beta (P < 0.05) increased whereas PHA- (P < 0.01) and GAD(65)-peptide (P < 0.01)-induced TGF-beta expression decreased in the placebo group, whereas it was maintained in the treated group.
2453 18549445 Without intervention, expression of CTLA-4 and TGF-beta, stimulated with PHA and GAD(65) peptide, decreased with time, with a parallel reduction of GAD(65)-peptide and PHA-stimulated TGF-beta expression.
2454 18761006 PBMC were cultured before and after cryopreservation either with GAD(65) or PHA.
2455 18761006 Secretion of cytokines (IL-5, -6, -10, -12, -13 -17, IFN-gamma and TNF-alpha) and chemokines (IP-10, MCP-1, MIP-1alpha, MIP-1beta and RANTES) was analysed in cell supernatants using multiplex fluorochrome technique (Luminex).
2456 18761006 Expression of FOXP3 and TGF-beta mRNA was detected by multiplex real-time RT-PCR.
2457 18761006 Increased spontaneous secretion of IL-6, -10, -12, -13, IFN-gamma and MCP-1, and mRNA expression of FOXP3 and TGF-beta, was detected after cryopreservation.
2458 18761006 Stimulation with GAD(65) induced higher levels of IL-6, IFN-gamma, TNF-alpha and MIP-1alpha, whereas lower secretion was found for IL-10 and IL-13 in cryopreserved PBMC.
2459 18761006 Stimulation with PHA induced lower secretion of IP-10, MCP-1 and RANTES and FOXP3 mRNA expression after cryopreservation.
2460 18761006 PBMC were cultured before and after cryopreservation either with GAD(65) or PHA.
2461 18761006 Secretion of cytokines (IL-5, -6, -10, -12, -13 -17, IFN-gamma and TNF-alpha) and chemokines (IP-10, MCP-1, MIP-1alpha, MIP-1beta and RANTES) was analysed in cell supernatants using multiplex fluorochrome technique (Luminex).
2462 18761006 Expression of FOXP3 and TGF-beta mRNA was detected by multiplex real-time RT-PCR.
2463 18761006 Increased spontaneous secretion of IL-6, -10, -12, -13, IFN-gamma and MCP-1, and mRNA expression of FOXP3 and TGF-beta, was detected after cryopreservation.
2464 18761006 Stimulation with GAD(65) induced higher levels of IL-6, IFN-gamma, TNF-alpha and MIP-1alpha, whereas lower secretion was found for IL-10 and IL-13 in cryopreserved PBMC.
2465 18761006 Stimulation with PHA induced lower secretion of IP-10, MCP-1 and RANTES and FOXP3 mRNA expression after cryopreservation.
2466 19085183 High titre of autoantibodies against GAD(65) (GAD(65)Abs) have also been detected in some other autoimmune diseases.
2467 19085183 In search of a potential immunological marker of type 1 diabetes, in vitro GAD(65) was modified by hydroxyl radical followed by the study of structural and conformational perturbed protein by different spectroscopic techniques (UV, fluorescence and CD) and thermal denaturation profile.
2468 19085183 Binding studies of circulating autoantibodies from diabetic groups (type 1 and type 2) with native and reactive oxygen species (ROS) modified GAD(65), exhibited high recognition of type 1 diabetic serum autoantibodies with modified antigen (p < 0.001) over unmodified GAD(65).
2469 19085183 Relative affinity of ROS-GAD(65)Abs for modified and native GAD(65) was in the order of 1.56 x 10(- 6) and 2.72 x 10(- 7) M, as calculated by Langmuir plot.
2470 19085183 In coherence, ROS oxidation of GAD(65) causes conformational perturbation, generating highly immunogenic unique neoepitopes that may be one of the factors in antigen-driven induction of type 1 diabetes autoantibodies that can serve as a potential marker in early diagnosis/prognosis of the disease.
2471 19085183 High titre of autoantibodies against GAD(65) (GAD(65)Abs) have also been detected in some other autoimmune diseases.
2472 19085183 In search of a potential immunological marker of type 1 diabetes, in vitro GAD(65) was modified by hydroxyl radical followed by the study of structural and conformational perturbed protein by different spectroscopic techniques (UV, fluorescence and CD) and thermal denaturation profile.
2473 19085183 Binding studies of circulating autoantibodies from diabetic groups (type 1 and type 2) with native and reactive oxygen species (ROS) modified GAD(65), exhibited high recognition of type 1 diabetic serum autoantibodies with modified antigen (p < 0.001) over unmodified GAD(65).
2474 19085183 Relative affinity of ROS-GAD(65)Abs for modified and native GAD(65) was in the order of 1.56 x 10(- 6) and 2.72 x 10(- 7) M, as calculated by Langmuir plot.
2475 19085183 In coherence, ROS oxidation of GAD(65) causes conformational perturbation, generating highly immunogenic unique neoepitopes that may be one of the factors in antigen-driven induction of type 1 diabetes autoantibodies that can serve as a potential marker in early diagnosis/prognosis of the disease.
2476 19085183 High titre of autoantibodies against GAD(65) (GAD(65)Abs) have also been detected in some other autoimmune diseases.
2477 19085183 In search of a potential immunological marker of type 1 diabetes, in vitro GAD(65) was modified by hydroxyl radical followed by the study of structural and conformational perturbed protein by different spectroscopic techniques (UV, fluorescence and CD) and thermal denaturation profile.
2478 19085183 Binding studies of circulating autoantibodies from diabetic groups (type 1 and type 2) with native and reactive oxygen species (ROS) modified GAD(65), exhibited high recognition of type 1 diabetic serum autoantibodies with modified antigen (p < 0.001) over unmodified GAD(65).
2479 19085183 Relative affinity of ROS-GAD(65)Abs for modified and native GAD(65) was in the order of 1.56 x 10(- 6) and 2.72 x 10(- 7) M, as calculated by Langmuir plot.
2480 19085183 In coherence, ROS oxidation of GAD(65) causes conformational perturbation, generating highly immunogenic unique neoepitopes that may be one of the factors in antigen-driven induction of type 1 diabetes autoantibodies that can serve as a potential marker in early diagnosis/prognosis of the disease.
2481 19085183 High titre of autoantibodies against GAD(65) (GAD(65)Abs) have also been detected in some other autoimmune diseases.
2482 19085183 In search of a potential immunological marker of type 1 diabetes, in vitro GAD(65) was modified by hydroxyl radical followed by the study of structural and conformational perturbed protein by different spectroscopic techniques (UV, fluorescence and CD) and thermal denaturation profile.
2483 19085183 Binding studies of circulating autoantibodies from diabetic groups (type 1 and type 2) with native and reactive oxygen species (ROS) modified GAD(65), exhibited high recognition of type 1 diabetic serum autoantibodies with modified antigen (p < 0.001) over unmodified GAD(65).
2484 19085183 Relative affinity of ROS-GAD(65)Abs for modified and native GAD(65) was in the order of 1.56 x 10(- 6) and 2.72 x 10(- 7) M, as calculated by Langmuir plot.
2485 19085183 In coherence, ROS oxidation of GAD(65) causes conformational perturbation, generating highly immunogenic unique neoepitopes that may be one of the factors in antigen-driven induction of type 1 diabetes autoantibodies that can serve as a potential marker in early diagnosis/prognosis of the disease.
2486 19085183 High titre of autoantibodies against GAD(65) (GAD(65)Abs) have also been detected in some other autoimmune diseases.
2487 19085183 In search of a potential immunological marker of type 1 diabetes, in vitro GAD(65) was modified by hydroxyl radical followed by the study of structural and conformational perturbed protein by different spectroscopic techniques (UV, fluorescence and CD) and thermal denaturation profile.
2488 19085183 Binding studies of circulating autoantibodies from diabetic groups (type 1 and type 2) with native and reactive oxygen species (ROS) modified GAD(65), exhibited high recognition of type 1 diabetic serum autoantibodies with modified antigen (p < 0.001) over unmodified GAD(65).
2489 19085183 Relative affinity of ROS-GAD(65)Abs for modified and native GAD(65) was in the order of 1.56 x 10(- 6) and 2.72 x 10(- 7) M, as calculated by Langmuir plot.
2490 19085183 In coherence, ROS oxidation of GAD(65) causes conformational perturbation, generating highly immunogenic unique neoepitopes that may be one of the factors in antigen-driven induction of type 1 diabetes autoantibodies that can serve as a potential marker in early diagnosis/prognosis of the disease.
2491 19111163 GAD65 autoantibodies predict conversion to insulin dependence when present in patients classified with type 2 diabetes nowadays more often referred to as patients with latent autoimmune diabetes in the adult (LADA) or type 1,5 diabetes.
2492 19111163 Analyses of T cells with HLA DRB1 0401-tetramers with GAD65-specific peptides as well as of anti-idiotypic GAD65 autoantibodies suggest that GAD65 autoreactivity is common.
2493 19111163 GAD65 autoantibodies predict conversion to insulin dependence when present in patients classified with type 2 diabetes nowadays more often referred to as patients with latent autoimmune diabetes in the adult (LADA) or type 1,5 diabetes.
2494 19111163 Analyses of T cells with HLA DRB1 0401-tetramers with GAD65-specific peptides as well as of anti-idiotypic GAD65 autoantibodies suggest that GAD65 autoreactivity is common.
2495 19120261 Primary endpoints include (1) appearance of one or more islet autoantibodies (to insulin, GAD65 or IA-2) confirmed at two consecutive visits; (2) development of T1D.
2496 19120303 When compared with that of T2D, a higher proportion of patients with T1D were positive for GAD-65 and IA-2 antibodies, and this difference was statistically significant for GAD-65 antibodies.
2497 19120319 Stocks of the WHO islet cell antibody, GAD(65) antibody, and IA-2 antibody standard (NIBSC 97/550) are now very limited.
2498 19120319 We have therefore made and tested a series of control preparations in which human monoclonal autoantibodies to IA-2 and to GAD(65) were diluted in antibody-negative human serum to different concentrations.
2499 19120319 After reconstitution (with 1 mL of water) the controls were tested by (125)I-IA-2 immunoprecipitation assay (IPA), (125)I-GAD(65) IPA, GAD(65) Ab ELISA and IA-2 Ab ELISA (kits from RSR Ltd.) and for ICA by immunofluorescence test (IFT).
2500 19120319 DAC1 is particularly suitable as a control for the (125)I IA-2 IPA; DAC2 is suitable for the (125)I-GAD(65) IPA, GAD(65) Ab ELISA, and IA-2 Ab ELISA; and DAC3 is suitable for the ICA IFT.
2501 19136037 The effect of CTLA-4 allele and haplotype frequencies on the interferon-gamma, tumor necrosis factor-alpha, and transforming growth factor-beta(1) levels and the presence in serum of GAD65 and IA-2 autoantibodies at the onset of T1D was evaluated.
2502 19136037 On the other hand, higher ketoacidosis at onset, younger age at onset, and higher levels of tumor necrosis factor-alpha and interferon-gamma were observed in T1D patients carriers of G allele in comparison with the carriers of AA genotype.
2503 19188044 Several antigens such as insulin, glutamic acid decarboxylase (GAD) and islet-specific glucose-6-phosphatase catalytic subunit related protein (IGRP) are considered to take part in the autoimmune destructive process.
2504 19188044 Because the role of GAD in the disease process of type 1 diabetes is still controversial, we investigated the disease phenotype upon in vivo induction of whole GAD65 reactivity using a GAD65 homo knockout NOD splenocytes to NOD-scid transfer system.
2505 19188044 Splenocytes from recipients of KOT splenocytes produced IL-10 (/IFN-gamma) upon GAD65 stimulation, whereas those from recipients of WTT splenocytes did not.
2506 19188044 Several antigens such as insulin, glutamic acid decarboxylase (GAD) and islet-specific glucose-6-phosphatase catalytic subunit related protein (IGRP) are considered to take part in the autoimmune destructive process.
2507 19188044 Because the role of GAD in the disease process of type 1 diabetes is still controversial, we investigated the disease phenotype upon in vivo induction of whole GAD65 reactivity using a GAD65 homo knockout NOD splenocytes to NOD-scid transfer system.
2508 19188044 Splenocytes from recipients of KOT splenocytes produced IL-10 (/IFN-gamma) upon GAD65 stimulation, whereas those from recipients of WTT splenocytes did not.
2509 19267332 Administration of the isoform GAD65 can prevent autoimmune destruction of pancreatic beta cells in non-obese diabetic (NOD) mice and the subsequent need for exogenous insulin replacement.
2510 19267332 A double-blind randomized Phase II trial in 70 patients (10-18 years old) with recent-onset type 1 diabetes showed significant preservation of residual insulin secretion and a GAD-specific immune response, both humoral and cell-mediated, but no treatment-related adverse events.
2511 19273071 We have studied three possible ways that could modulate the processing and presentation of T cell determinants of a diabetes autoantigen, glutamic acid decarboxylase (GAD) 65, which could contribute to induction of GAD65-specific regulatory versus pathogenic T cells in type 1 diabetes (T1D): 1) enhanced presentation of subdominant/cryptic determinants to T cells that have not been well-tolerized, which may activate T cells of high affinity and high aggressiveness; 2) trimming or truncating flanking residues which may otherwise provide needed binding energy to determinants that activate regulatory cells, thus releasing autoaggressive T cells from suppression; 3) biochemical or chemical modifications of self antigens in an inflammatory environment or within activated antigen presenting cells (APC) which may convert a previously regulatory antigen or determinant into a disease-causing one that activates autoreactive T cells at a higher affinity.
2512 19298606 A medical history was recorded and a blood sample was analysed for autoantibodies against gliadin, transglutaminase, adrenal cortex, intrinsic factor, anti-thyroid peroxidase (anti-TPO) and glutamic-acid-decarboxylase 65 (GAD-65).
2513 19465164 For the past twenty years the type 1 diabetes autoantigen glutamic acid decarboxylase (65 kDa isoform; GAD65) has become a prototypic autoantigen, yielding a wealth of immunological and clinical insights.
2514 19557295 Autoimmunity to islet cell antigens like glutamic acid decarboxylase 65kD (GAD65) is associated with the destruction of insulin-producing beta-cells and progression to type 1 diabetes (T1D) in NOD mice and humans.
2515 19557295 Further, co-culture of GAD65(546-554)-specific CTL with the beta-cells leads to a reduction in insulin production and the induction of perforin-mediated cell death.
2516 19557295 Autoimmunity to islet cell antigens like glutamic acid decarboxylase 65kD (GAD65) is associated with the destruction of insulin-producing beta-cells and progression to type 1 diabetes (T1D) in NOD mice and humans.
2517 19557295 Further, co-culture of GAD65(546-554)-specific CTL with the beta-cells leads to a reduction in insulin production and the induction of perforin-mediated cell death.
2518 19690518 Efficacy was associated with an expansion of bystander suppressor regulatory T cells (Tregs) recognizing the C-terminal region of GAD65 and secreting interleukin-10 (IL-10), transforming growth factor-beta (TGF-beta), and interferon-gamma (IFN-gamma).
2519 19690518 In addition, we found that frequency and epitope specificity of GAD65-reactive CD4(+) T cells during antigen priming at diabetes onset and Tregs detected after CT correlated.
2520 19690518 Consequently, NOD mice harbored significantly lower levels of GAD65-reactive CD4(+) T cells than RIP-LCMV-GP before and after treatment.
2521 19690518 Efficacy was associated with an expansion of bystander suppressor regulatory T cells (Tregs) recognizing the C-terminal region of GAD65 and secreting interleukin-10 (IL-10), transforming growth factor-beta (TGF-beta), and interferon-gamma (IFN-gamma).
2522 19690518 In addition, we found that frequency and epitope specificity of GAD65-reactive CD4(+) T cells during antigen priming at diabetes onset and Tregs detected after CT correlated.
2523 19690518 Consequently, NOD mice harbored significantly lower levels of GAD65-reactive CD4(+) T cells than RIP-LCMV-GP before and after treatment.
2524 19690518 Efficacy was associated with an expansion of bystander suppressor regulatory T cells (Tregs) recognizing the C-terminal region of GAD65 and secreting interleukin-10 (IL-10), transforming growth factor-beta (TGF-beta), and interferon-gamma (IFN-gamma).
2525 19690518 In addition, we found that frequency and epitope specificity of GAD65-reactive CD4(+) T cells during antigen priming at diabetes onset and Tregs detected after CT correlated.
2526 19690518 Consequently, NOD mice harbored significantly lower levels of GAD65-reactive CD4(+) T cells than RIP-LCMV-GP before and after treatment.
2527 19752238 Furthermore, suppression of T1D was dependent on beta cell-specific IL-10-secreting CD4+ T cells, although the frequency of GAD65-specific FoxP3-expressing CD4+ T cells was also increased in sIA(g7)-pGAD65 dimer vaccinated NOD mice.
2528 19768773 Fifty diabetic patients and 30 controls with other autoimmune diseases underwent neurological examination and search for antibodies to gangliosides, glutamic acid decarboxylase (GAD(65)), and tyrosine phosphatase (IA2).
2529 19768773 Disease duration was shorter in patients with antibodies to GAD(65) and IA2 and longer in neuropathic patients.
2530 20029631 Detection of GAD65 autoreactive T-cells by HLA class I tetramers in type 1 diabetic patients.
2531 20029631 We aimed to design a method to detect circulating CD8+ T cells autoreactive against an epitope of the glutamic acid decarboxylase autoantigen, isoform 65 (GAD65) ex vivo in T1D patients by using HLA class I tetramers.
2532 20029631 Low frequencies of GAD65 peptide-specific CD8+ cytotoxic T lymphocytes were detected in peripheral blood lymphocytes (PBMC) of normal controls after GAD65 peptide-specific stimulation.
2533 20029631 Detection of GAD65 autoreactive T-cells by HLA class I tetramers in type 1 diabetic patients.
2534 20029631 We aimed to design a method to detect circulating CD8+ T cells autoreactive against an epitope of the glutamic acid decarboxylase autoantigen, isoform 65 (GAD65) ex vivo in T1D patients by using HLA class I tetramers.
2535 20029631 Low frequencies of GAD65 peptide-specific CD8+ cytotoxic T lymphocytes were detected in peripheral blood lymphocytes (PBMC) of normal controls after GAD65 peptide-specific stimulation.
2536 20029631 Detection of GAD65 autoreactive T-cells by HLA class I tetramers in type 1 diabetic patients.
2537 20029631 We aimed to design a method to detect circulating CD8+ T cells autoreactive against an epitope of the glutamic acid decarboxylase autoantigen, isoform 65 (GAD65) ex vivo in T1D patients by using HLA class I tetramers.
2538 20029631 Low frequencies of GAD65 peptide-specific CD8+ cytotoxic T lymphocytes were detected in peripheral blood lymphocytes (PBMC) of normal controls after GAD65 peptide-specific stimulation.
2539 20083660 Peptides in VP7, a major immunogenic protein of RV, have high sequence similarity to T cell epitope peptides in the islet autoantigens tyrosine phosphatase-like insulinoma Ag 2 (IA2) and glutamic acid decarboxylase 65 (GAD65).
2540 20083660 Peptides in RV and their sequence-similar counterparts in IA2 and GAD65 were assayed for binding to HLA molecules associated with type 1 diabetes and for the ability to elicit T cell proliferative responses in HLA-typed individuals.
2541 20083660 Peptides in RV-VP7, similar to T cell epitopes in IA2 and GAD65, bound strongly to HLA-DRB1*04 molecules that confer susceptibility to type 1 diabetes and were also T cell epitopes in humans at risk for type 1 diabetes.
2542 20083660 T cells expanded to the IA2 epitope could be restimulated to express IFN-gamma by the similar peptide in RV-VP7, and T cell clones generated to this RV-VP7 peptide cross-reacted with the IA2 epitope.
2543 20083660 Peptides in VP7, a major immunogenic protein of RV, have high sequence similarity to T cell epitope peptides in the islet autoantigens tyrosine phosphatase-like insulinoma Ag 2 (IA2) and glutamic acid decarboxylase 65 (GAD65).
2544 20083660 Peptides in RV and their sequence-similar counterparts in IA2 and GAD65 were assayed for binding to HLA molecules associated with type 1 diabetes and for the ability to elicit T cell proliferative responses in HLA-typed individuals.
2545 20083660 Peptides in RV-VP7, similar to T cell epitopes in IA2 and GAD65, bound strongly to HLA-DRB1*04 molecules that confer susceptibility to type 1 diabetes and were also T cell epitopes in humans at risk for type 1 diabetes.
2546 20083660 T cells expanded to the IA2 epitope could be restimulated to express IFN-gamma by the similar peptide in RV-VP7, and T cell clones generated to this RV-VP7 peptide cross-reacted with the IA2 epitope.
2547 20083660 Peptides in VP7, a major immunogenic protein of RV, have high sequence similarity to T cell epitope peptides in the islet autoantigens tyrosine phosphatase-like insulinoma Ag 2 (IA2) and glutamic acid decarboxylase 65 (GAD65).
2548 20083660 Peptides in RV and their sequence-similar counterparts in IA2 and GAD65 were assayed for binding to HLA molecules associated with type 1 diabetes and for the ability to elicit T cell proliferative responses in HLA-typed individuals.
2549 20083660 Peptides in RV-VP7, similar to T cell epitopes in IA2 and GAD65, bound strongly to HLA-DRB1*04 molecules that confer susceptibility to type 1 diabetes and were also T cell epitopes in humans at risk for type 1 diabetes.
2550 20083660 T cells expanded to the IA2 epitope could be restimulated to express IFN-gamma by the similar peptide in RV-VP7, and T cell clones generated to this RV-VP7 peptide cross-reacted with the IA2 epitope.
2551 20086252 Comparison of radioimmunoprecipitation with luciferase immunoprecipitation for autoantibodies to GAD65 and IA-2beta.
2552 20348424 High titers of autoantibodies against glutamic acid decarboxylase (GAD) 65 are commonly observed in patients suffering from type 1 diabetes as well as stiff-person syndrome (SPS), a disorder that affects the CNS, and a variant of SPS, progressive encephalomyelitis with rigidity and myoclonus.
2553 20348424 Although there is a considerable amount of data focusing on the role of GAD65-specific CD4(+) T cells in type 1 diabetes, little is known about their role in SPS.
2554 20348424 In this study, we show that mice possessing a monoclonal GAD65-specific CD4(+) T cell population (4B5, PA19.9G11, or PA17.9G7) develop a lethal encephalomyelitis-like disease in the absence of any other T cells or B cells.
2555 20348424 GAD65-reactive CD4(+) T cells were found throughout the CNS in direct concordance with GAD65 expression and activated microglia: proximal to the circumventricular organs at the interface between the brain parenchyma and the blood-brain barrier.
2556 20348424 In addition, GAD65-specific CD4(+) T cells isolated from the brain were activated and produced IFN-gamma.
2557 20348424 These findings suggest that GAD65-reactive CD4(+) T cells alone mediate a lethal encephalomyelitis-like disease that may serve as a useful model to study GAD65-mediated diseases of the CNS.
2558 20348424 High titers of autoantibodies against glutamic acid decarboxylase (GAD) 65 are commonly observed in patients suffering from type 1 diabetes as well as stiff-person syndrome (SPS), a disorder that affects the CNS, and a variant of SPS, progressive encephalomyelitis with rigidity and myoclonus.
2559 20348424 Although there is a considerable amount of data focusing on the role of GAD65-specific CD4(+) T cells in type 1 diabetes, little is known about their role in SPS.
2560 20348424 In this study, we show that mice possessing a monoclonal GAD65-specific CD4(+) T cell population (4B5, PA19.9G11, or PA17.9G7) develop a lethal encephalomyelitis-like disease in the absence of any other T cells or B cells.
2561 20348424 GAD65-reactive CD4(+) T cells were found throughout the CNS in direct concordance with GAD65 expression and activated microglia: proximal to the circumventricular organs at the interface between the brain parenchyma and the blood-brain barrier.
2562 20348424 In addition, GAD65-specific CD4(+) T cells isolated from the brain were activated and produced IFN-gamma.
2563 20348424 These findings suggest that GAD65-reactive CD4(+) T cells alone mediate a lethal encephalomyelitis-like disease that may serve as a useful model to study GAD65-mediated diseases of the CNS.
2564 20348424 High titers of autoantibodies against glutamic acid decarboxylase (GAD) 65 are commonly observed in patients suffering from type 1 diabetes as well as stiff-person syndrome (SPS), a disorder that affects the CNS, and a variant of SPS, progressive encephalomyelitis with rigidity and myoclonus.
2565 20348424 Although there is a considerable amount of data focusing on the role of GAD65-specific CD4(+) T cells in type 1 diabetes, little is known about their role in SPS.
2566 20348424 In this study, we show that mice possessing a monoclonal GAD65-specific CD4(+) T cell population (4B5, PA19.9G11, or PA17.9G7) develop a lethal encephalomyelitis-like disease in the absence of any other T cells or B cells.
2567 20348424 GAD65-reactive CD4(+) T cells were found throughout the CNS in direct concordance with GAD65 expression and activated microglia: proximal to the circumventricular organs at the interface between the brain parenchyma and the blood-brain barrier.
2568 20348424 In addition, GAD65-specific CD4(+) T cells isolated from the brain were activated and produced IFN-gamma.
2569 20348424 These findings suggest that GAD65-reactive CD4(+) T cells alone mediate a lethal encephalomyelitis-like disease that may serve as a useful model to study GAD65-mediated diseases of the CNS.
2570 20348424 High titers of autoantibodies against glutamic acid decarboxylase (GAD) 65 are commonly observed in patients suffering from type 1 diabetes as well as stiff-person syndrome (SPS), a disorder that affects the CNS, and a variant of SPS, progressive encephalomyelitis with rigidity and myoclonus.
2571 20348424 Although there is a considerable amount of data focusing on the role of GAD65-specific CD4(+) T cells in type 1 diabetes, little is known about their role in SPS.
2572 20348424 In this study, we show that mice possessing a monoclonal GAD65-specific CD4(+) T cell population (4B5, PA19.9G11, or PA17.9G7) develop a lethal encephalomyelitis-like disease in the absence of any other T cells or B cells.
2573 20348424 GAD65-reactive CD4(+) T cells were found throughout the CNS in direct concordance with GAD65 expression and activated microglia: proximal to the circumventricular organs at the interface between the brain parenchyma and the blood-brain barrier.
2574 20348424 In addition, GAD65-specific CD4(+) T cells isolated from the brain were activated and produced IFN-gamma.
2575 20348424 These findings suggest that GAD65-reactive CD4(+) T cells alone mediate a lethal encephalomyelitis-like disease that may serve as a useful model to study GAD65-mediated diseases of the CNS.
2576 20348424 High titers of autoantibodies against glutamic acid decarboxylase (GAD) 65 are commonly observed in patients suffering from type 1 diabetes as well as stiff-person syndrome (SPS), a disorder that affects the CNS, and a variant of SPS, progressive encephalomyelitis with rigidity and myoclonus.
2577 20348424 Although there is a considerable amount of data focusing on the role of GAD65-specific CD4(+) T cells in type 1 diabetes, little is known about their role in SPS.
2578 20348424 In this study, we show that mice possessing a monoclonal GAD65-specific CD4(+) T cell population (4B5, PA19.9G11, or PA17.9G7) develop a lethal encephalomyelitis-like disease in the absence of any other T cells or B cells.
2579 20348424 GAD65-reactive CD4(+) T cells were found throughout the CNS in direct concordance with GAD65 expression and activated microglia: proximal to the circumventricular organs at the interface between the brain parenchyma and the blood-brain barrier.
2580 20348424 In addition, GAD65-specific CD4(+) T cells isolated from the brain were activated and produced IFN-gamma.
2581 20348424 These findings suggest that GAD65-reactive CD4(+) T cells alone mediate a lethal encephalomyelitis-like disease that may serve as a useful model to study GAD65-mediated diseases of the CNS.
2582 20370569 A low antigen dose selectively promotes expansion of high-avidity autoreactive T cells with distinct phenotypic characteristics: a study of human autoreactive CD4+T cells specific for GAD65.
2583 20370569 We addressed the question, how antigen dose shapes the diversity of CD4+ autoreactive T cells specific for glutamate decarboxylase 65 (GAD65) in a healthy HLA-DR*0404+ individual, with a persistent GAD65-specific T-cell response.
2584 20370569 CD4+T cells from this subject were stimulated with decreasing concentrations of the GAD65 555-567 (557I) peptide, and T-cell clones were derived from the tetramer-binding cell population.
2585 20370569 High IL-13 and IL-10 production by GAD65-reactive T cells suggests a more anti-inflammatory profile of this healthy individual underlying protection from T1D.
2586 20370569 A low antigen dose selectively promotes expansion of high-avidity autoreactive T cells with distinct phenotypic characteristics: a study of human autoreactive CD4+T cells specific for GAD65.
2587 20370569 We addressed the question, how antigen dose shapes the diversity of CD4+ autoreactive T cells specific for glutamate decarboxylase 65 (GAD65) in a healthy HLA-DR*0404+ individual, with a persistent GAD65-specific T-cell response.
2588 20370569 CD4+T cells from this subject were stimulated with decreasing concentrations of the GAD65 555-567 (557I) peptide, and T-cell clones were derived from the tetramer-binding cell population.
2589 20370569 High IL-13 and IL-10 production by GAD65-reactive T cells suggests a more anti-inflammatory profile of this healthy individual underlying protection from T1D.
2590 20370569 A low antigen dose selectively promotes expansion of high-avidity autoreactive T cells with distinct phenotypic characteristics: a study of human autoreactive CD4+T cells specific for GAD65.
2591 20370569 We addressed the question, how antigen dose shapes the diversity of CD4+ autoreactive T cells specific for glutamate decarboxylase 65 (GAD65) in a healthy HLA-DR*0404+ individual, with a persistent GAD65-specific T-cell response.
2592 20370569 CD4+T cells from this subject were stimulated with decreasing concentrations of the GAD65 555-567 (557I) peptide, and T-cell clones were derived from the tetramer-binding cell population.
2593 20370569 High IL-13 and IL-10 production by GAD65-reactive T cells suggests a more anti-inflammatory profile of this healthy individual underlying protection from T1D.
2594 20370569 A low antigen dose selectively promotes expansion of high-avidity autoreactive T cells with distinct phenotypic characteristics: a study of human autoreactive CD4+T cells specific for GAD65.
2595 20370569 We addressed the question, how antigen dose shapes the diversity of CD4+ autoreactive T cells specific for glutamate decarboxylase 65 (GAD65) in a healthy HLA-DR*0404+ individual, with a persistent GAD65-specific T-cell response.
2596 20370569 CD4+T cells from this subject were stimulated with decreasing concentrations of the GAD65 555-567 (557I) peptide, and T-cell clones were derived from the tetramer-binding cell population.
2597 20370569 High IL-13 and IL-10 production by GAD65-reactive T cells suggests a more anti-inflammatory profile of this healthy individual underlying protection from T1D.
2598 20406664 Increased anti-GAD65 IgG1, serum IgA and unchanged IgG2a antibodies titers; together with an increase of IL-4, IL-10 production and a decrease of IFN-gamma production suggested possible activation of GAD65-specific Th2 immune responses.
2599 20445565 The association between the PTPN22 1858C>T variant and type 1 diabetes depends on HLA risk and GAD65 autoantibodies.
2600 20503259 Characterization of CD4+ T cells specific for glutamic acid decarboxylase (GAD65) and proinsulin in a patient with stiff-person syndrome but without type 1 diabetes.
2601 20540111 Since most of the glutamic acid decarboxylase 65 (GAD65)-specific CD4(+) T cells in the NOD mouse are tolerogenic but unable to function in an autoimmune environment, we have activated a silent, monoclonal T-regulatory cell population (GAD65(217-230)-specific CD4(+) T cells) using a soluble I-A(αβ) (g7)/GAD65(217-230)/Fcγ2a dimer, and measured the effect on the ongoing polyclonal diabetogenic T-cell process.
2602 20540111 Activated GAD65(217-230)-specific T cells and a fraction of the diabetogenic (B(9-23)-specific) T cells were polarized toward the IL-10-secreting T-regulatory type 1-like function in the pancreas of diabetic NOD mice.
2603 20540111 Since most of the glutamic acid decarboxylase 65 (GAD65)-specific CD4(+) T cells in the NOD mouse are tolerogenic but unable to function in an autoimmune environment, we have activated a silent, monoclonal T-regulatory cell population (GAD65(217-230)-specific CD4(+) T cells) using a soluble I-A(αβ) (g7)/GAD65(217-230)/Fcγ2a dimer, and measured the effect on the ongoing polyclonal diabetogenic T-cell process.
2604 20540111 Activated GAD65(217-230)-specific T cells and a fraction of the diabetogenic (B(9-23)-specific) T cells were polarized toward the IL-10-secreting T-regulatory type 1-like function in the pancreas of diabetic NOD mice.
2605 20580618 Here we investigated if boosted GADA induced changes in IgG1, 2, 3 and 4 subclass distributions or affected GAD(65) enzyme activity.
2606 20969926 Administration of dendritic cells dual expressing DcR3 and GAD65 mediates the suppression of T cells and induces long-term acceptance of pancreatic-islet transplantation.
2607 20969926 In this study, dendritic cells (DCs) were transfected with the recombinant adenovirus, dual expressing DcR3 and GAD65 in vitro, and NOD mice were administrated with the genetically modified DCs in vivo after islet transplantation.
2608 20969926 The findings suggest that the adoptive transfer of genetically modified DCs dual expressing DcR3 and GAD65 represent a future therapeutic potential in T1D and pancreatic-islet transplantation.
2609 20969926 Administration of dendritic cells dual expressing DcR3 and GAD65 mediates the suppression of T cells and induces long-term acceptance of pancreatic-islet transplantation.
2610 20969926 In this study, dendritic cells (DCs) were transfected with the recombinant adenovirus, dual expressing DcR3 and GAD65 in vitro, and NOD mice were administrated with the genetically modified DCs in vivo after islet transplantation.
2611 20969926 The findings suggest that the adoptive transfer of genetically modified DCs dual expressing DcR3 and GAD65 represent a future therapeutic potential in T1D and pancreatic-islet transplantation.
2612 20969926 Administration of dendritic cells dual expressing DcR3 and GAD65 mediates the suppression of T cells and induces long-term acceptance of pancreatic-islet transplantation.
2613 20969926 In this study, dendritic cells (DCs) were transfected with the recombinant adenovirus, dual expressing DcR3 and GAD65 in vitro, and NOD mice were administrated with the genetically modified DCs in vivo after islet transplantation.
2614 20969926 The findings suggest that the adoptive transfer of genetically modified DCs dual expressing DcR3 and GAD65 represent a future therapeutic potential in T1D and pancreatic-islet transplantation.
2615 21050716 To this end, we determined the feasibility of cloning and expanding human CD4(+) Treg specific for the type 1 diabetes autoantigens, GAD65 and proinsulin.
2616 21050716 Blood CD4(+) cells stimulated to divide in response to GAD65 (in three healthy individuals) or proinsulin (in one type 1 diabetic) were flow sorted into single cells and cultured on feeder cells in the presence of anti-CD3 monoclonal antibody, IL-2 and IL-4.
2617 21050716 Treg clones were not distinguished by markers of conventional CD4(+)CD25(+) Treg and suppressed independently of cell-cell contact but not via known soluble suppressor factors.
2618 21263221 Does immune-tolerance treatment with Alum-formulated GAD65 protect insulin-production in the pancreatic islet β cells?
2619 21604002 Antibodies to GAD65 and IA-2 were determined by radioimmunoassay.
2620 21604002 IA-2 autoantibodies did correlate neither with EV-RNA nor with insulin resistance.
2621 21911777 A longitudinal study of GAD65 and ICA512 autoantibodies during the progression to type 1 diabetes in Diabetes Prevention Trial-Type 1 (DPT-1) participants.
2622 22174945 A phase II clinical trial with glutamic acid decarboxylase (GAD) 65 formulated with aluminium hydroxide (GAD-alum) has shown efficacy in preserving residual insulin secretion in children and adolescents with recent-onset type 1 diabetes (T1D).
2623 22174945 Peripheral blood mononuclear cells (PBMC) were stimulated in vitro with GAD(65).
2624 22174945 Frequencies of naïve, central and effector memory CD4+ and CD8+ T cells were measured, together with cytokine secretion, proliferation, gene expression and serum GAD(65) autoantibody (GADA) levels.
2625 22174945 Moreover, post-treatment serum GADA titres remained persistently increased in the GAD-alum arm, but did not inhibit GAD(65) enzymatic activity.
2626 22174945 In parallel to a GAD(65)-induced T-cell activation, our results show induction of T-cell inhibitory pathways important for regulating the GAD(65) immunity.
2627 22174945 A phase II clinical trial with glutamic acid decarboxylase (GAD) 65 formulated with aluminium hydroxide (GAD-alum) has shown efficacy in preserving residual insulin secretion in children and adolescents with recent-onset type 1 diabetes (T1D).
2628 22174945 Peripheral blood mononuclear cells (PBMC) were stimulated in vitro with GAD(65).
2629 22174945 Frequencies of naïve, central and effector memory CD4+ and CD8+ T cells were measured, together with cytokine secretion, proliferation, gene expression and serum GAD(65) autoantibody (GADA) levels.
2630 22174945 Moreover, post-treatment serum GADA titres remained persistently increased in the GAD-alum arm, but did not inhibit GAD(65) enzymatic activity.
2631 22174945 In parallel to a GAD(65)-induced T-cell activation, our results show induction of T-cell inhibitory pathways important for regulating the GAD(65) immunity.
2632 22174945 A phase II clinical trial with glutamic acid decarboxylase (GAD) 65 formulated with aluminium hydroxide (GAD-alum) has shown efficacy in preserving residual insulin secretion in children and adolescents with recent-onset type 1 diabetes (T1D).
2633 22174945 Peripheral blood mononuclear cells (PBMC) were stimulated in vitro with GAD(65).
2634 22174945 Frequencies of naïve, central and effector memory CD4+ and CD8+ T cells were measured, together with cytokine secretion, proliferation, gene expression and serum GAD(65) autoantibody (GADA) levels.
2635 22174945 Moreover, post-treatment serum GADA titres remained persistently increased in the GAD-alum arm, but did not inhibit GAD(65) enzymatic activity.
2636 22174945 In parallel to a GAD(65)-induced T-cell activation, our results show induction of T-cell inhibitory pathways important for regulating the GAD(65) immunity.
2637 22174945 A phase II clinical trial with glutamic acid decarboxylase (GAD) 65 formulated with aluminium hydroxide (GAD-alum) has shown efficacy in preserving residual insulin secretion in children and adolescents with recent-onset type 1 diabetes (T1D).
2638 22174945 Peripheral blood mononuclear cells (PBMC) were stimulated in vitro with GAD(65).
2639 22174945 Frequencies of naïve, central and effector memory CD4+ and CD8+ T cells were measured, together with cytokine secretion, proliferation, gene expression and serum GAD(65) autoantibody (GADA) levels.
2640 22174945 Moreover, post-treatment serum GADA titres remained persistently increased in the GAD-alum arm, but did not inhibit GAD(65) enzymatic activity.
2641 22174945 In parallel to a GAD(65)-induced T-cell activation, our results show induction of T-cell inhibitory pathways important for regulating the GAD(65) immunity.
2642 22385239 In this study we showed that peripheral sera cytokines [interleukin (IL)-12, IL-6, II-1β, tumour necrosis factor (TNF)-α, IL-10] and chemokines (CXCL10, CXCL8, CXCL9, CCL2) measured were significantly higher in newly diagnosed T1AD patients when compared to healthy controls (P < 0·001).
2643 22385239 Among T1AD, we found a positive correlation between CXCL10 and CCL-2 (r = 0·80; P = 0·000), IL-8 and TNF-α (r = 0·60; P = 0·000); IL-8 and IL-12 (r = 0·57; P = 0·001) and TNF-α and IL-12 (r = 0·93; P = 0·000).
2644 22385239 Glutamic acid decarboxylase-65 (GAD-65) autoantibodies (GADA) were associated negatively with CXCL10 (r = -0·45; P = 0·011) and CCL2 (r = -0·65; P = 0·000), while IA-2A showed a negative correlation with IL-10 (r = -0·38; P = 0·027).
2645 22385239 Human leucocyte antigen (HLA) DR3, DR4 or DR3/DR4 and PTPN22 polymorphism did not show any association with pancreatic islet cell antibodies or cytokines studied.
2646 22519592 We observed a decreased expression of bad, bax and fasL pro-apoptotic genes and an increased expression of a1, bcl-x(L) and cIAP-2 anti-apoptotic genes in patients' peripheral blood mononuclear cells (PBMCs) compared to controls.
2647 22519592 After HDI-AHSCT, we found an up-regulation of fas and fasL and a down-regulation of anti-apoptotic bcl-x(L) genes expression in post-HDI-AHSCT periods compared to pre-transplantation.
2648 22519592 Additionally, the levels of bad, bax, bok, fasL, bcl-x(L) and cIAP-1 genes expression were found similar to controls 2 years after HDI-AHSCT.
2649 22519592 Furthermore, over-expression of pro-apoptotic noxa at 540 days post-HDI-AHSCT correlated positively with insulin-free patients and conversely with glutamic acid decarboxylase autoantibodies (GAD65) autoantibody levels.
2650 22567309 The importance of the cellular immune reaction involving cytotoxic CD8-positive T cells to kill beta cells through Class I MHC is discussed along with speculations of the possible role of B lymphocytes in presenting the proinsulin autoantigen over and over again through insulin-carrying insulin autoantibodies.
2651 22567309 In contrast to autoantibodies against other islet autoantigens such as GAD65, IA-2, and ZnT8 transporters, it has not been possible yet to standardize the insulin autoantibody test.
2652 22893260 FP eluates were tested using both single and combined assay for antibodies to glutamic acid decarboxylase (GADA) and/or to the protein tyrosine phosphatase like IA-2 (IA-2A), and a single assay for antibodies to insulin (IAA).
2653 22893260 The GADA and IA-2A were measured by radio-binding assays, which utilize 35S-labeled GAD65 and IA-2.
2654 22908193 In this context, we evaluate the biochemical nature and immunogenicity of the major autoantigens in T1D including (pro)insulin, GAD65, ZnT8, IA2, and ICA69.
2655 23028856 Examination of an initial cohort of 93 controls and 50 T1D subjects revealed that 16% of the diabetic subjects showed anti-gastric ATPase autoantibodies which did not correlate with autoantibodies against GAD65, IA2, or IA2-β.
2656 23028856 A subset of T1D subjects exhibited autoantibodies against several organ-specific targets including gastric ATPase (11%), thyroid peroxidase (14%), and anti-IgA autoantibodies against tissue transglutaminase (12%).
2657 23226634 Several experimental and clinical trials of applying GAD65, Hsp60, peptide-MHC, pepetide-277 immunization, anti-CD3 infusion, and interleukins to modulate immune response in T1DM were done.
2658 23235561 We compared four different HSV1-based vectors engineered to produce one of two opioid receptor agonists (enkephalin or endomorphin), or one of two isoforms of glutamic acid decarboxylase (GAD65 or GAD67), alone and in combination, in the streptozotocin-induced diabetic rat and mouse models.
2659 23296174 Autoantibodies against insulin, GAD65, IA-2 or the ZnT8 transporter mark islet autoimmunity.
2660 23349478 We found naïve proinsulin- and GAD65-responsive T cells in cord blood (CB) of healthy newborns, with highest responses observed in children with type 1 diabetes-susceptible HLA-DRB1/DQB1 genotypes.
2661 23480181 The PTPN22 1858T allele but not variants in the proximal promoter region of IL-21 gene is associated with the susceptibility to type 1 diabetes and the presence of autoantibodies in a Brazilian cohort.
2662 23480181 Interleukin (IL)-21 and protein tyrosine phosphatase non-receptor 22 (PTPN22) regulate lymphocyte function and have been implicated in the pathogenesis of autoimmune diabetes.
2663 23480181 We sequenced the proximal promoter of the IL-21 gene for the first time and analysed the PTPN22 1858T polymorphism in type 1A diabetes (T1AD) patients and healthy controls (HC).
2664 23480181 We also evaluated human leucocyte antigen (HLA) DR3/DR4 alleles.
2665 23480181 The frequencies of glutamic acid decarboxylase (GAD65), tyrosine phosphatase-like protein (IA)-2, anti-nuclear antibody (ANA), thyroid peroxidase (TPO), thyroglobulin (TG), thyrotrophin receptor autoantibody (TRAb), anti-smooth muscle (ASM) and 21-hydroxylase (21-OH) autoantibodies were higher in T1AD patients than in HC.
2666 23480181 The PTPN22 1858T allele was associated with an increased risk for developing T1AD [odds ratio (OR) = 1·94; P < 0·001], particularly in patients of European ancestry, and with a higher frequency of GAD65 and TG autoantibodies.
2667 23480181 In conclusion, only PTPN22 C1858T polymorphism and HLA-DR3 and/or DR4 alleles, but not allelic variants in the 5'-proximal region of the IL-21 gene were associated with T1AD risk.
2668 23480181 The C1858T PTPN22 polymorphism was also associated with a higher frequency of GAD65 and TG autoantibodies.
2669 23480181 The PTPN22 1858T allele but not variants in the proximal promoter region of IL-21 gene is associated with the susceptibility to type 1 diabetes and the presence of autoantibodies in a Brazilian cohort.
2670 23480181 Interleukin (IL)-21 and protein tyrosine phosphatase non-receptor 22 (PTPN22) regulate lymphocyte function and have been implicated in the pathogenesis of autoimmune diabetes.
2671 23480181 We sequenced the proximal promoter of the IL-21 gene for the first time and analysed the PTPN22 1858T polymorphism in type 1A diabetes (T1AD) patients and healthy controls (HC).
2672 23480181 We also evaluated human leucocyte antigen (HLA) DR3/DR4 alleles.
2673 23480181 The frequencies of glutamic acid decarboxylase (GAD65), tyrosine phosphatase-like protein (IA)-2, anti-nuclear antibody (ANA), thyroid peroxidase (TPO), thyroglobulin (TG), thyrotrophin receptor autoantibody (TRAb), anti-smooth muscle (ASM) and 21-hydroxylase (21-OH) autoantibodies were higher in T1AD patients than in HC.
2674 23480181 The PTPN22 1858T allele was associated with an increased risk for developing T1AD [odds ratio (OR) = 1·94; P < 0·001], particularly in patients of European ancestry, and with a higher frequency of GAD65 and TG autoantibodies.
2675 23480181 In conclusion, only PTPN22 C1858T polymorphism and HLA-DR3 and/or DR4 alleles, but not allelic variants in the 5'-proximal region of the IL-21 gene were associated with T1AD risk.
2676 23480181 The C1858T PTPN22 polymorphism was also associated with a higher frequency of GAD65 and TG autoantibodies.
2677 23480181 The PTPN22 1858T allele but not variants in the proximal promoter region of IL-21 gene is associated with the susceptibility to type 1 diabetes and the presence of autoantibodies in a Brazilian cohort.
2678 23480181 Interleukin (IL)-21 and protein tyrosine phosphatase non-receptor 22 (PTPN22) regulate lymphocyte function and have been implicated in the pathogenesis of autoimmune diabetes.
2679 23480181 We sequenced the proximal promoter of the IL-21 gene for the first time and analysed the PTPN22 1858T polymorphism in type 1A diabetes (T1AD) patients and healthy controls (HC).
2680 23480181 We also evaluated human leucocyte antigen (HLA) DR3/DR4 alleles.
2681 23480181 The frequencies of glutamic acid decarboxylase (GAD65), tyrosine phosphatase-like protein (IA)-2, anti-nuclear antibody (ANA), thyroid peroxidase (TPO), thyroglobulin (TG), thyrotrophin receptor autoantibody (TRAb), anti-smooth muscle (ASM) and 21-hydroxylase (21-OH) autoantibodies were higher in T1AD patients than in HC.
2682 23480181 The PTPN22 1858T allele was associated with an increased risk for developing T1AD [odds ratio (OR) = 1·94; P < 0·001], particularly in patients of European ancestry, and with a higher frequency of GAD65 and TG autoantibodies.
2683 23480181 In conclusion, only PTPN22 C1858T polymorphism and HLA-DR3 and/or DR4 alleles, but not allelic variants in the 5'-proximal region of the IL-21 gene were associated with T1AD risk.
2684 23480181 The C1858T PTPN22 polymorphism was also associated with a higher frequency of GAD65 and TG autoantibodies.
2685 23600827 Glutamic acid decarboxylase (GAD)(65) formulated with aluminium hydroxide (GAD-alum) was effective in preserving insulin secretion in a Phase II clinical trial in children and adolescents with recent-onset type 1 diabetes.
2686 23600827 In addition, GAD-alum treated patients increased CD4(+) CD25(hi) forkhead box protein 3(+) (FoxP3(+)) cell numbers in response to in-vitro GAD(65) stimulation.
2687 23600827 Regulatory T cells (CD4(+) CD25(hi) CD127(lo)) and effector T cells (CD4(+) CD25(-) CD127(+)) were further sorted, expanded and used in suppression assays to assess regulatory T cell function after GAD-alum treatment.
2688 23600827 GAD-alum-treated patients displayed higher frequencies of in-vitro GAD(65) -induced CD4(+) CD25(+) CD127(+) as well as CD4(+) CD25(hi) CD127(lo) and CD4(+) FoxP3(+) cells compared to placebo.
2689 23600827 Moreover, GAD(65) stimulation induced a population of CD4(hi) cells consisting mainly of CD25(+) CD127(+) , which was specific of GAD-alum-treated patients (16 of 25 versus one of 25 in placebo).
2690 23600827 In conclusion, GAD-alum treatment induced both GAD(65) -reactive CD25(+) CD127(+) and CD25(hi) CD127(lo) cells, but no difference in regulatory T cell function 4 years after GAD-alum treatment.
2691 23600827 Glutamic acid decarboxylase (GAD)(65) formulated with aluminium hydroxide (GAD-alum) was effective in preserving insulin secretion in a Phase II clinical trial in children and adolescents with recent-onset type 1 diabetes.
2692 23600827 In addition, GAD-alum treated patients increased CD4(+) CD25(hi) forkhead box protein 3(+) (FoxP3(+)) cell numbers in response to in-vitro GAD(65) stimulation.
2693 23600827 Regulatory T cells (CD4(+) CD25(hi) CD127(lo)) and effector T cells (CD4(+) CD25(-) CD127(+)) were further sorted, expanded and used in suppression assays to assess regulatory T cell function after GAD-alum treatment.
2694 23600827 GAD-alum-treated patients displayed higher frequencies of in-vitro GAD(65) -induced CD4(+) CD25(+) CD127(+) as well as CD4(+) CD25(hi) CD127(lo) and CD4(+) FoxP3(+) cells compared to placebo.
2695 23600827 Moreover, GAD(65) stimulation induced a population of CD4(hi) cells consisting mainly of CD25(+) CD127(+) , which was specific of GAD-alum-treated patients (16 of 25 versus one of 25 in placebo).
2696 23600827 In conclusion, GAD-alum treatment induced both GAD(65) -reactive CD25(+) CD127(+) and CD25(hi) CD127(lo) cells, but no difference in regulatory T cell function 4 years after GAD-alum treatment.
2697 23600827 Glutamic acid decarboxylase (GAD)(65) formulated with aluminium hydroxide (GAD-alum) was effective in preserving insulin secretion in a Phase II clinical trial in children and adolescents with recent-onset type 1 diabetes.
2698 23600827 In addition, GAD-alum treated patients increased CD4(+) CD25(hi) forkhead box protein 3(+) (FoxP3(+)) cell numbers in response to in-vitro GAD(65) stimulation.
2699 23600827 Regulatory T cells (CD4(+) CD25(hi) CD127(lo)) and effector T cells (CD4(+) CD25(-) CD127(+)) were further sorted, expanded and used in suppression assays to assess regulatory T cell function after GAD-alum treatment.
2700 23600827 GAD-alum-treated patients displayed higher frequencies of in-vitro GAD(65) -induced CD4(+) CD25(+) CD127(+) as well as CD4(+) CD25(hi) CD127(lo) and CD4(+) FoxP3(+) cells compared to placebo.
2701 23600827 Moreover, GAD(65) stimulation induced a population of CD4(hi) cells consisting mainly of CD25(+) CD127(+) , which was specific of GAD-alum-treated patients (16 of 25 versus one of 25 in placebo).
2702 23600827 In conclusion, GAD-alum treatment induced both GAD(65) -reactive CD25(+) CD127(+) and CD25(hi) CD127(lo) cells, but no difference in regulatory T cell function 4 years after GAD-alum treatment.
2703 23600827 Glutamic acid decarboxylase (GAD)(65) formulated with aluminium hydroxide (GAD-alum) was effective in preserving insulin secretion in a Phase II clinical trial in children and adolescents with recent-onset type 1 diabetes.
2704 23600827 In addition, GAD-alum treated patients increased CD4(+) CD25(hi) forkhead box protein 3(+) (FoxP3(+)) cell numbers in response to in-vitro GAD(65) stimulation.
2705 23600827 Regulatory T cells (CD4(+) CD25(hi) CD127(lo)) and effector T cells (CD4(+) CD25(-) CD127(+)) were further sorted, expanded and used in suppression assays to assess regulatory T cell function after GAD-alum treatment.
2706 23600827 GAD-alum-treated patients displayed higher frequencies of in-vitro GAD(65) -induced CD4(+) CD25(+) CD127(+) as well as CD4(+) CD25(hi) CD127(lo) and CD4(+) FoxP3(+) cells compared to placebo.
2707 23600827 Moreover, GAD(65) stimulation induced a population of CD4(hi) cells consisting mainly of CD25(+) CD127(+) , which was specific of GAD-alum-treated patients (16 of 25 versus one of 25 in placebo).
2708 23600827 In conclusion, GAD-alum treatment induced both GAD(65) -reactive CD25(+) CD127(+) and CD25(hi) CD127(lo) cells, but no difference in regulatory T cell function 4 years after GAD-alum treatment.
2709 23770292 Glutamic acid decarboxylase of 65 kDa (GAD65) is a major autoantigen in type 1 diabetes (T1D) and GAD-specific autoimmunity is a common feature of T1D in humans but also in mouse models of the disease.
2710 23770292 Consistent with the latest clinical trials, mice treated with GAD-alum were not protected from diabetes, although GAD-alum induced a GAD-specific Th2-deviated immune response in transgenic rat insulin promoter-glycoprotein (RIP-GP) mice.
2711 23841104 PBMCs from these individuals were stimulated with a cocktail of diabetes-associated autoantigens (proinsulin, IA-2, and GAD65-derived peptides).
2712 23900975 Currently, four major molecular targets ([pro]insulin, GAD65, IA-2, and ZnT8) have been confirmed, with approximately 94% of all subjects with a clinical diagnosis of type 1 diabetes expressing autoantibodies to at least one of these molecules at clinical onset.
2713 23928796 Circulating primary CD4(+) or CD8(+) T cells were quantified with 5-color flow cytometry.
2714 23928796 Serum IL-22 and IL-17 levels were examined by ELISA.
2715 23928796 Serum autoantibodies were measured by radio-binding assays, using (35)S-labeled glutamic acid decarboxylase-65 (GAD65), protein tyrosine phosphatase-2 (IA-2), and zinc transporter 8 (ZnT8).
2716 23928796 However, we did not find any correlation between IL-17 and IL-22 in sera.
2717 23974918 The assay was validated with serum samples from 227 newly diagnosed diabetic children; 68 prediabetic children who were prospectively followed to T1D; 130 nondiabetic children with confirmed islet autoantibodies to insulin, GAD65, IA-2, and/or ZnT8 longitudinally followed for 12 ± 3.7 years; and 181 age-matched, healthy, antibody-negative children.