Gene name: proteasome (prosome, macropain) subunit, beta type, 9 (large multifunctional peptidase 2)
# |
PMID |
Sentence |
1 |
7847389
|
Association of LMP2 and LMP7 genes within the major histocompatibility complex with insulin-dependent diabetes mellitus: population and family studies.
|
2 |
7847389
|
LMP2 and LMP7, two subunits of the proteasomes encoded in the major histocompatibility complex, are speculated to play a role in the generation of endogenous peptides for presentation by class I molecules to cytotoxic T cells.
|
3 |
7847389
|
Their possible role in the pathogenesis of insulin-dependent diabetes mellitus (IDDM) has not been documented.
|
4 |
7847389
|
In this study of Caucasian subjects, we have analyzed the polymorphisms of four genes within the HLA class II region (LMP2, LMP7, and HLA-DRB1 and -DQB1) in 198 unrelated IDDM patients and 192 normal controls ascertained from the southeastern United States.
|
5 |
7847389
|
A genomic polymorphism of LMP7 was found strongly associated with IDDM, and the Arg/His-60 polymorphism in LMP2 was found associated with IDDM only in subjects containing an HLA DR4-DQB1*0302 haplotype.
|
6 |
7847389
|
Association of LMP2 and LMP7 genes within the major histocompatibility complex with insulin-dependent diabetes mellitus: population and family studies.
|
7 |
7847389
|
LMP2 and LMP7, two subunits of the proteasomes encoded in the major histocompatibility complex, are speculated to play a role in the generation of endogenous peptides for presentation by class I molecules to cytotoxic T cells.
|
8 |
7847389
|
Their possible role in the pathogenesis of insulin-dependent diabetes mellitus (IDDM) has not been documented.
|
9 |
7847389
|
In this study of Caucasian subjects, we have analyzed the polymorphisms of four genes within the HLA class II region (LMP2, LMP7, and HLA-DRB1 and -DQB1) in 198 unrelated IDDM patients and 192 normal controls ascertained from the southeastern United States.
|
10 |
7847389
|
A genomic polymorphism of LMP7 was found strongly associated with IDDM, and the Arg/His-60 polymorphism in LMP2 was found associated with IDDM only in subjects containing an HLA DR4-DQB1*0302 haplotype.
|
11 |
7847389
|
Association of LMP2 and LMP7 genes within the major histocompatibility complex with insulin-dependent diabetes mellitus: population and family studies.
|
12 |
7847389
|
LMP2 and LMP7, two subunits of the proteasomes encoded in the major histocompatibility complex, are speculated to play a role in the generation of endogenous peptides for presentation by class I molecules to cytotoxic T cells.
|
13 |
7847389
|
Their possible role in the pathogenesis of insulin-dependent diabetes mellitus (IDDM) has not been documented.
|
14 |
7847389
|
In this study of Caucasian subjects, we have analyzed the polymorphisms of four genes within the HLA class II region (LMP2, LMP7, and HLA-DRB1 and -DQB1) in 198 unrelated IDDM patients and 192 normal controls ascertained from the southeastern United States.
|
15 |
7847389
|
A genomic polymorphism of LMP7 was found strongly associated with IDDM, and the Arg/His-60 polymorphism in LMP2 was found associated with IDDM only in subjects containing an HLA DR4-DQB1*0302 haplotype.
|
16 |
7901128
|
The peptides are generated in the course of antigen processing from endogenously synthesized cytosolic proteins, and transported into the endoplasmic reticulum to associate with an MHC class-I molecule.
|
17 |
7901128
|
So far, at least four genes, Lmp-2, -7, and Tap-1, -2, have been identified between the Pb and Ob genes of the mouse MHC class-II region.
|
18 |
7903260
|
Susceptibility to insulin-dependent diabetes mellitus (IDDM) is greatly influenced by polymorphisms in the genes of the class II region of the human leukocyte antigen (HLA) complex.
|
19 |
7903260
|
Because the recently discovered transporter associated with antigen processing (TAP) and large multifunctional protease (LMP) genes are encoded in the HLA class II region and are implicated in the processing of antigenic proteins for presentation by HLA class I molecules, they are additional candidates for a role in IDDM pathogenesis.
|
20 |
7903260
|
We have analyzed genomic and coding sequence polymorphisms in the LMP2, TAP1, and TAP2 genes of 77 Danish IDDM patients and 102 control subjects.
|
21 |
7903260
|
Although patients and control subjects did not differ in TAP1 and LMP2 alleles, we found a striking absence of the TAP2 allele B (long form) in IDDM patients.
|
22 |
7903260
|
Susceptibility to insulin-dependent diabetes mellitus (IDDM) is greatly influenced by polymorphisms in the genes of the class II region of the human leukocyte antigen (HLA) complex.
|
23 |
7903260
|
Because the recently discovered transporter associated with antigen processing (TAP) and large multifunctional protease (LMP) genes are encoded in the HLA class II region and are implicated in the processing of antigenic proteins for presentation by HLA class I molecules, they are additional candidates for a role in IDDM pathogenesis.
|
24 |
7903260
|
We have analyzed genomic and coding sequence polymorphisms in the LMP2, TAP1, and TAP2 genes of 77 Danish IDDM patients and 102 control subjects.
|
25 |
7903260
|
Although patients and control subjects did not differ in TAP1 and LMP2 alleles, we found a striking absence of the TAP2 allele B (long form) in IDDM patients.
|
26 |
7911550
|
In order to investigate whether TAP (Transporter associated with Antigen Processing) and LMP (Low Molecular Weight Polypeptide) genes, which are located in the class II HLA region, are HLA-linked diabetogenic genes, the association of TAP1, TAP2 and LMP2 genes with type 1 diabetes was analyzed in the Japanese population.
|
27 |
9000709
|
No independent associations of LMP2 and LMP7 polymorphisms with susceptibility to develop IDDM.
|
28 |
9000709
|
Results from a recent study suggested that polymorphisms within the HLA class II genes LMP2 and LMP7 were associated with the susceptibility for developing IDDM, and that this association could not be explained by linkage disequilibrium to HLA-DR or -DQ genes.
|
29 |
9000709
|
We typed 285 IDDM patients and 337 HLA-DRB1-DQA1-DQB1 genotypically matched control subjects from an ethnically homogeneous population for both the G/T polymorphism in intron 6 of the LMP7 gene and the Arg-His polymorphism in the LMP2 gene.
|
30 |
9000709
|
Our data suggest that none of these LMP2 or LMP7 polymorphisms are independently associated with IDDM susceptibility, in contrast to what has been previously reported by others.
|
31 |
9000709
|
No independent associations of LMP2 and LMP7 polymorphisms with susceptibility to develop IDDM.
|
32 |
9000709
|
Results from a recent study suggested that polymorphisms within the HLA class II genes LMP2 and LMP7 were associated with the susceptibility for developing IDDM, and that this association could not be explained by linkage disequilibrium to HLA-DR or -DQ genes.
|
33 |
9000709
|
We typed 285 IDDM patients and 337 HLA-DRB1-DQA1-DQB1 genotypically matched control subjects from an ethnically homogeneous population for both the G/T polymorphism in intron 6 of the LMP7 gene and the Arg-His polymorphism in the LMP2 gene.
|
34 |
9000709
|
Our data suggest that none of these LMP2 or LMP7 polymorphisms are independently associated with IDDM susceptibility, in contrast to what has been previously reported by others.
|
35 |
9000709
|
No independent associations of LMP2 and LMP7 polymorphisms with susceptibility to develop IDDM.
|
36 |
9000709
|
Results from a recent study suggested that polymorphisms within the HLA class II genes LMP2 and LMP7 were associated with the susceptibility for developing IDDM, and that this association could not be explained by linkage disequilibrium to HLA-DR or -DQ genes.
|
37 |
9000709
|
We typed 285 IDDM patients and 337 HLA-DRB1-DQA1-DQB1 genotypically matched control subjects from an ethnically homogeneous population for both the G/T polymorphism in intron 6 of the LMP7 gene and the Arg-His polymorphism in the LMP2 gene.
|
38 |
9000709
|
Our data suggest that none of these LMP2 or LMP7 polymorphisms are independently associated with IDDM susceptibility, in contrast to what has been previously reported by others.
|
39 |
9000709
|
No independent associations of LMP2 and LMP7 polymorphisms with susceptibility to develop IDDM.
|
40 |
9000709
|
Results from a recent study suggested that polymorphisms within the HLA class II genes LMP2 and LMP7 were associated with the susceptibility for developing IDDM, and that this association could not be explained by linkage disequilibrium to HLA-DR or -DQ genes.
|
41 |
9000709
|
We typed 285 IDDM patients and 337 HLA-DRB1-DQA1-DQB1 genotypically matched control subjects from an ethnically homogeneous population for both the G/T polymorphism in intron 6 of the LMP7 gene and the Arg-His polymorphism in the LMP2 gene.
|
42 |
9000709
|
Our data suggest that none of these LMP2 or LMP7 polymorphisms are independently associated with IDDM susceptibility, in contrast to what has been previously reported by others.
|
43 |
9133543
|
Interferon-gamma independently activates the MHC class I antigen processing pathway and diminishes glucose responsiveness in pancreatic beta-cell lines.
|
44 |
9133543
|
A significant reduction in insulin content and secretion was observed on a per-cell basis in glucose-stimulated beta TC3 and beta TC6-F7 cells after 12 h of exposure to IFN-gamma.
|
45 |
9133543
|
The steadystate level of pre-proinsulin mRNA expression was not affected by IFN-gamma.
|
46 |
9133543
|
Time-course analysis of IFN-gamma-regulated mRNA expression of the two intra-MHC-encoded subunits of the proteasome (low-molecular-mass polypeptide [Lmp]-2 and Lmp-7) revealed a correlation between their induction and the inhibitory effects of IFN-gamma on glucose-stimulated insulin production.
|
47 |
9133543
|
Increased expression of Lmp-2 and Lmp-7 mRNA was accompanied by a corresponding induction of LMP2 and LMP7 protein expression.
|
48 |
9133543
|
Subsequently, major histocompatibility complex (MHC) class I cell-surface expression was significantly increased in IFN-gamma-treated beta TC3 and beta TC6-F7 cells.
|
49 |
9133543
|
Exposure of IFN-gamma-treated beta-cells to a peptide aldehyde inhibitor of the proteasome (MG132) significantly attenuated MHC class I cell-surface expression but did not prevent the negative effects of IFN-gamma on glucose responsiveness.
|
50 |
9133543
|
Enhanced expression of the MHC class I antigen processing and presentation pathway and diminished insulin production appear to be distinct pathological alterations in beta-cells exposed to the insulitic cytokine IFN-gamma.
|
51 |
9271825
|
Autoimmune thyroid diseases (AITD) and insulin-dependent diabetes mellitus (IDDM) are two autoimmune syndromes of unknown etiology with common immune features.
|
52 |
9271825
|
One is that the target cells, thyrocytes and pancreatic islet beta cells respectively, hyperexpress several proteins encoded in the HLA region: HLA class I, HLA class II and transporter associated with antigen processing (TAP-1): the clinical course and many aspects of the immunopathology are, however, quite different.
|
53 |
9271825
|
Low-molecular-mass polypeptides 2 and 7 (LMP2 and LMP7) are proteasome subunits that increase the efficiency of endogenous antigen processing and are encoded in close vicinity to the TAP genes.
|
54 |
9271825
|
We investigated whether LMP2 and LMP7 are hyperexpressed in thyrocytes and islet cells in AITD and IDDM.
|
55 |
9271825
|
The results demonstrate that, in normal glands, thyrocytes and pancreatic islet cells express comparable moderate to low levels of LMP2 and LMP7.
|
56 |
9271825
|
In AITD and IDDM, expression of LMP2/7 in the endocrine cells was disparate: while in AITD glands there was hyperexpression of LMP2 and 7 parallel to that of HLA class I and TAP-1, in the islet cells of recent onset diabetic pancreases (n = 2) the level of LMP2 and 7 expression was totally normal, including islets that were infiltrated by lymphocytes and hyperexpressed HLA class I and TAP-1.
|
57 |
9271825
|
Autoimmune thyroid diseases (AITD) and insulin-dependent diabetes mellitus (IDDM) are two autoimmune syndromes of unknown etiology with common immune features.
|
58 |
9271825
|
One is that the target cells, thyrocytes and pancreatic islet beta cells respectively, hyperexpress several proteins encoded in the HLA region: HLA class I, HLA class II and transporter associated with antigen processing (TAP-1): the clinical course and many aspects of the immunopathology are, however, quite different.
|
59 |
9271825
|
Low-molecular-mass polypeptides 2 and 7 (LMP2 and LMP7) are proteasome subunits that increase the efficiency of endogenous antigen processing and are encoded in close vicinity to the TAP genes.
|
60 |
9271825
|
We investigated whether LMP2 and LMP7 are hyperexpressed in thyrocytes and islet cells in AITD and IDDM.
|
61 |
9271825
|
The results demonstrate that, in normal glands, thyrocytes and pancreatic islet cells express comparable moderate to low levels of LMP2 and LMP7.
|
62 |
9271825
|
In AITD and IDDM, expression of LMP2/7 in the endocrine cells was disparate: while in AITD glands there was hyperexpression of LMP2 and 7 parallel to that of HLA class I and TAP-1, in the islet cells of recent onset diabetic pancreases (n = 2) the level of LMP2 and 7 expression was totally normal, including islets that were infiltrated by lymphocytes and hyperexpressed HLA class I and TAP-1.
|
63 |
9271825
|
Autoimmune thyroid diseases (AITD) and insulin-dependent diabetes mellitus (IDDM) are two autoimmune syndromes of unknown etiology with common immune features.
|
64 |
9271825
|
One is that the target cells, thyrocytes and pancreatic islet beta cells respectively, hyperexpress several proteins encoded in the HLA region: HLA class I, HLA class II and transporter associated with antigen processing (TAP-1): the clinical course and many aspects of the immunopathology are, however, quite different.
|
65 |
9271825
|
Low-molecular-mass polypeptides 2 and 7 (LMP2 and LMP7) are proteasome subunits that increase the efficiency of endogenous antigen processing and are encoded in close vicinity to the TAP genes.
|
66 |
9271825
|
We investigated whether LMP2 and LMP7 are hyperexpressed in thyrocytes and islet cells in AITD and IDDM.
|
67 |
9271825
|
The results demonstrate that, in normal glands, thyrocytes and pancreatic islet cells express comparable moderate to low levels of LMP2 and LMP7.
|
68 |
9271825
|
In AITD and IDDM, expression of LMP2/7 in the endocrine cells was disparate: while in AITD glands there was hyperexpression of LMP2 and 7 parallel to that of HLA class I and TAP-1, in the islet cells of recent onset diabetic pancreases (n = 2) the level of LMP2 and 7 expression was totally normal, including islets that were infiltrated by lymphocytes and hyperexpressed HLA class I and TAP-1.
|
69 |
9271825
|
Autoimmune thyroid diseases (AITD) and insulin-dependent diabetes mellitus (IDDM) are two autoimmune syndromes of unknown etiology with common immune features.
|
70 |
9271825
|
One is that the target cells, thyrocytes and pancreatic islet beta cells respectively, hyperexpress several proteins encoded in the HLA region: HLA class I, HLA class II and transporter associated with antigen processing (TAP-1): the clinical course and many aspects of the immunopathology are, however, quite different.
|
71 |
9271825
|
Low-molecular-mass polypeptides 2 and 7 (LMP2 and LMP7) are proteasome subunits that increase the efficiency of endogenous antigen processing and are encoded in close vicinity to the TAP genes.
|
72 |
9271825
|
We investigated whether LMP2 and LMP7 are hyperexpressed in thyrocytes and islet cells in AITD and IDDM.
|
73 |
9271825
|
The results demonstrate that, in normal glands, thyrocytes and pancreatic islet cells express comparable moderate to low levels of LMP2 and LMP7.
|
74 |
9271825
|
In AITD and IDDM, expression of LMP2/7 in the endocrine cells was disparate: while in AITD glands there was hyperexpression of LMP2 and 7 parallel to that of HLA class I and TAP-1, in the islet cells of recent onset diabetic pancreases (n = 2) the level of LMP2 and 7 expression was totally normal, including islets that were infiltrated by lymphocytes and hyperexpressed HLA class I and TAP-1.
|
75 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
76 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
77 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
78 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
79 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
80 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
81 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
82 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
83 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
84 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
85 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
86 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
87 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
88 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
89 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
90 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
91 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
92 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
93 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
94 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
95 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
96 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
97 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
98 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
99 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
100 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
101 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
102 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
103 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
104 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
105 |
9300732
|
Reduced expression of Tap1 and Lmp2 antigen-processing genes in the nonobese diabetic (NOD) mouse due to a mutation in their shared bidirectional promoter.
|
106 |
9300732
|
Lmp2 and Tap1 are genes located in the MHC class II region, and they encode proteins participating in the generation and transport of endogenous peptides for T cell education.
|
107 |
9300732
|
A mutation (T-->A) has now been detected in the shared bidirectional promoter of the Lmp2 and Tap1 genes in the nonobese diabetic (NOD) mouse.
|
108 |
9300732
|
It also created a CAAT-like box and an inverted CAAT-like box in the Lmp2 and Tap1 orientations, respectively.
|
109 |
9300732
|
Northern blot revealed reduced amounts of Tap1 and Lmp2 mRNA in NOD mice, and 5'-rapid amplification of cDNA ends revealed the loss of a transcription start site of Lmp2 in these animals.
|
110 |
9300732
|
The Tap1-Lmp2 promoter from NOD mice showed reduced transcriptional activity in transient transfection assays with luciferase reporter constructs for both Tap1 and Lmp2 genes.
|
111 |
9599304
|
Quantitative defects in the density of conformationally correct human lymphocyte antigen (HLA) class I complexes on the surface of lymphocytes are apparent in patients with diverse HLA-linked autoimmune diseases, including Type I diabetes and Sjögren's syndrome.
|
112 |
9599304
|
Polyglandular failure patients whose disease showed HLA linkage, but not those whose disease was not HLA linked, exhibited decreased HLA class I expression on the surface of their lymphocytes as well as a reduced abundance of transcripts of the HLA-linked genes Tap1 and Tap2, both of which encode proteins that contribute to HLA class I processing.
|
113 |
9599304
|
Second, lymphocytes from patients with insulin-dependent diabetes mellitus (IDDM), Sjögren's syndrome, Graves' disease, and Hashimoto's disease showed varying degrees of decreased abundance of mRNAs that encode Tap1, Tap2, Lmp2, or Lmp7 (the latter two proteins also contribute to HLA class I processing).
|
114 |
9599304
|
Fourth, functional assays of isolated diabetic proteasomes, the peptide cutting complex containing LMP2 and LMP7 proteins, revealed altered peptidase activity.
|
115 |
9599304
|
Quantitative defects in the density of conformationally correct human lymphocyte antigen (HLA) class I complexes on the surface of lymphocytes are apparent in patients with diverse HLA-linked autoimmune diseases, including Type I diabetes and Sjögren's syndrome.
|
116 |
9599304
|
Polyglandular failure patients whose disease showed HLA linkage, but not those whose disease was not HLA linked, exhibited decreased HLA class I expression on the surface of their lymphocytes as well as a reduced abundance of transcripts of the HLA-linked genes Tap1 and Tap2, both of which encode proteins that contribute to HLA class I processing.
|
117 |
9599304
|
Second, lymphocytes from patients with insulin-dependent diabetes mellitus (IDDM), Sjögren's syndrome, Graves' disease, and Hashimoto's disease showed varying degrees of decreased abundance of mRNAs that encode Tap1, Tap2, Lmp2, or Lmp7 (the latter two proteins also contribute to HLA class I processing).
|
118 |
9599304
|
Fourth, functional assays of isolated diabetic proteasomes, the peptide cutting complex containing LMP2 and LMP7 proteins, revealed altered peptidase activity.
|
119 |
10051633
|
In addition to causing abnormal MHC expression, the ds nucleic acids increase the expression of genes necessary for antigen processing and presentation: proteasome proteins (e.g., LMP2), transporters of antigen peptides; invariant chain, HLA-DM, and the costimulatory molecule B7.1.
|
120 |
10051633
|
The ds nucleic acids also induce or activate Stat1, Stat3, mitogen-activated protein kinase, NF-kappaB, the class II transactivator, RFX5, and the IFN regulatory factor 1 differently from gammaIFN.
|
121 |
10567588
|
The pronounced proteasome defect results in defective production and activation of the transcription factor NF-kappaB, which plays an important role in immune and inflammatory responses as well as in preventing apoptosis induced by tumor necrosis factor alpha.
|
122 |
10567588
|
The defect in proteasome function in NOD mouse splenocytes was evident from impaired NF-kappaB subunit p50 and p52 generation by proteolytic processing and impaired degradation of the NF-kappaB-inhibitory protein IkappaBalpha.
|
123 |
10567588
|
These data suggest that NOD proteasome dysfunction is due to a tissue- and developmental-stage-specific defect in expression of the MHC-linked Lmp2 gene, resulting in altered transcription factor NF-kappaB activity, and that this defect contributes to pathogenesis in NOD mice.
|
124 |
11025557
|
A specific proteasome defect has now been identified in NOD mouse lymphocytes that results from down-regulation of expression of the proteasome subunit LMP2, which is encoded by a gene in the MHC genomic region.
|
125 |
11025557
|
This defect both prevents the proteolytic processing required for the production and activation of the transcription factor nuclear factor-kappaB (NF-kappaB), which plays an important role in immune and inflammatory responses, in addition to increasing the susceptibility of the affected cells to apoptosis induced by tumor necrosis factor-alpha (TNF-alpha).
|
126 |
11129119
|
These include increased expression of proteasome processing proteins (LMP2), transporters of antigen peptides (TAP), invariant chain (Ii), HLA-DM, and the co-stimulatory molecule, B7, as well as STAT and NF-kappaB activation.
|
127 |
11129119
|
A critical factor in these changes is the loss of normal negative regulation of MHC class I, class II, and thyrotropin receptor (TSHR) gene expression, which is necessary to maintain self-tolerance during the normal changes in gene expression involved in hormonally-increased growth and function of the cell.
|
128 |
11129119
|
Self-tolerance to the TSHR is maintained in normals because there is a population of CD8- cells which normally suppresses a population of CD4+ cells that can interact with the TSHR if thyrocytes become APCs.
|
129 |
11467344
|
A specific proteasome defect has been identified in NOD mouse in select lymphocytic and monocytic lineages that results from down-regulation of expression of the proteasome subunit LMP2, which is encoded by a gene in the MHC genomic region.
|
130 |
11467344
|
This defect prevents the proteolytic processing required for the production and activation of the transcription factor nuclear factor-kappaB (NF-kappaB), which plays important roles in immune and inflammatory responses, as well as increases the susceptibility of the affected cells to apoptosis induced by tumor necrosis factor-alpha (TNF-alpha).
|
131 |
11601002
|
[Relationship of polymorphism of LMP2 gene to insulin-dependent diabetes mellitus and DR3 gene].
|
132 |
11717249
|
Two such genes encoding the LMP2 and LMP7 proteasome subunits are located in this high-risk MHC genomic region.
|
133 |
11717249
|
The spontaneous defective LMP2 expression in NOD mice, which is gender biased toward female cohorts, is restricted to select lymphoid and myeloid cells and is developmentally controlled with lowered LMP2 protein and heightened tumor necrosis factor-alpha-induced apoptosis.
|
134 |
11717249
|
Two such genes encoding the LMP2 and LMP7 proteasome subunits are located in this high-risk MHC genomic region.
|
135 |
11717249
|
The spontaneous defective LMP2 expression in NOD mice, which is gender biased toward female cohorts, is restricted to select lymphoid and myeloid cells and is developmentally controlled with lowered LMP2 protein and heightened tumor necrosis factor-alpha-induced apoptosis.
|
136 |
12795417
|
In murine models of autoimmune lupus, for example, mutations in the death receptor Fas (CD95) or in its ligand, FasL (CD95L), have been identified and shown to render lymphoid cells resistant to apoptosis.
|
137 |
12795417
|
In contrast, select lymphoid subpopulations of mice with autoimmune diabetes manifest an increased susceptibility to apoptosis as a result of impaired activation of the transcription factor nuclear factor-kappa B (NF-kappaB), which normally protects cells against tumor necrosis factor-alpha (TNF-alpha)-induced apoptosis.
|
138 |
12795417
|
The genetic basis of this defect in NF-kappaB activation is a mutation in the promoter-enhancer region of a gene that encodes an essential subunit (LMP2) of the proteasome.
|
139 |
12903836
|
We also investigated if IL-1beta could influence the expression of two inducible proteasome subunits, namely LMP2 and LMP7, and found that the cytokine increased the mRNA expression of the proteasome subunit LMP2 in islets, and that the proteasome inhibitor MG115 prevented this increase.
|
140 |
12903836
|
In conclusion our study shows that IL-1beta increases the transcription of the proteasome subunit LMP2, and that the proteasome is involved in IL-1beta induced suppression of islet function.
|
141 |
12903836
|
We also investigated if IL-1beta could influence the expression of two inducible proteasome subunits, namely LMP2 and LMP7, and found that the cytokine increased the mRNA expression of the proteasome subunit LMP2 in islets, and that the proteasome inhibitor MG115 prevented this increase.
|
142 |
12903836
|
In conclusion our study shows that IL-1beta increases the transcription of the proteasome subunit LMP2, and that the proteasome is involved in IL-1beta induced suppression of islet function.
|
143 |
17491658
|
Peptides are assembled with class I molecules by pathways that are either dependent or independent of transport by ABC proteins (TAP) and degradation in the immunoproteasome by its subunits LMP2 and LMP7.
|
144 |
17491658
|
Therefore, allelic variations in the coding sequences of TAP and LMP were suspected for a long time to be responsible for improper antigen processing, interruption of self-peptide presentation and reduced cell surface expression of MHC class I molecules resulting in the activation of autoreactive CD8(+) T cells.
|
145 |
20153750
|
Inducible immunoproteasome subunits LMP-2 and LMP-7 are constitutively expressed in the heart; however, their regulation and functions are poorly understood.
|
146 |
20153750
|
In diabetic hearts, LMP-2 expression was downregulated whereas expression of the phosphatase and tensin homologue deleted on chromosome ten (PTEN) and the muscle atrophy F-box were upregulated.
|
147 |
20153750
|
Moreover, mice with muscle-specific knockout of PTEN gene demonstrated increased cardiac muscle mass, while mice with LMP-2 deficiency demonstrated PTEN accumulation, muscle mass loss, and contractile impairment in the heart.
|
148 |
20153750
|
Inducible immunoproteasome subunits LMP-2 and LMP-7 are constitutively expressed in the heart; however, their regulation and functions are poorly understood.
|
149 |
20153750
|
In diabetic hearts, LMP-2 expression was downregulated whereas expression of the phosphatase and tensin homologue deleted on chromosome ten (PTEN) and the muscle atrophy F-box were upregulated.
|
150 |
20153750
|
Moreover, mice with muscle-specific knockout of PTEN gene demonstrated increased cardiac muscle mass, while mice with LMP-2 deficiency demonstrated PTEN accumulation, muscle mass loss, and contractile impairment in the heart.
|
151 |
20153750
|
Inducible immunoproteasome subunits LMP-2 and LMP-7 are constitutively expressed in the heart; however, their regulation and functions are poorly understood.
|
152 |
20153750
|
In diabetic hearts, LMP-2 expression was downregulated whereas expression of the phosphatase and tensin homologue deleted on chromosome ten (PTEN) and the muscle atrophy F-box were upregulated.
|
153 |
20153750
|
Moreover, mice with muscle-specific knockout of PTEN gene demonstrated increased cardiac muscle mass, while mice with LMP-2 deficiency demonstrated PTEN accumulation, muscle mass loss, and contractile impairment in the heart.
|
154 |
22737082
|
In a recent GWAS, we localized five IgAN susceptibility loci on Chr.6p21 (HLA-DQB1/DRB1, PSMB9/TAP1, and DPA1/DPB2 loci), Chr.1q32 (CFHR3/R1 locus), and Chr.22q12 (HORMAD2 locus).
|
155 |
22737082
|
Four susceptibility loci robustly replicated and all five loci were genome-wide significant in the combined cohort (P = 5×10⁻³²-3×10⁻¹⁰), with heterogeneity detected only at the PSMB9/TAP1 locus (I² = 0.60).
|
156 |
22737082
|
Conditional analyses identified two new independent risk alleles within the HLA-DQB1/DRB1 locus, defining multiple risk and protective haplotypes within this interval.
|
157 |
22737082
|
In a recent GWAS, we localized five IgAN susceptibility loci on Chr.6p21 (HLA-DQB1/DRB1, PSMB9/TAP1, and DPA1/DPB2 loci), Chr.1q32 (CFHR3/R1 locus), and Chr.22q12 (HORMAD2 locus).
|
158 |
22737082
|
Four susceptibility loci robustly replicated and all five loci were genome-wide significant in the combined cohort (P = 5×10⁻³²-3×10⁻¹⁰), with heterogeneity detected only at the PSMB9/TAP1 locus (I² = 0.60).
|
159 |
22737082
|
Conditional analyses identified two new independent risk alleles within the HLA-DQB1/DRB1 locus, defining multiple risk and protective haplotypes within this interval.
|