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1944595
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A class of alleles at the VNTR (variable number of tandem repeat) locus in the 5' region of the insulin gene (INS) on chromosome 11p is associated with increased risk of insulin-dependent diabetes mellitus (IDDM), but family studies have failed to demonstrate linkage.
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1944595
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INS is thought to contribute to IDDM susceptibility but this view has been difficult to reconcile with the lack of linkage evidence.
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1944595
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We thus investigated polymorphisms of INS and neighbouring loci in random diabetics, IDDM multiplex families and controls.
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1944595
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HLA-DR4-positive diabetics showed an increased risk associated with common variants at polymorphic sites in a 19-kilobase segment spanned by the 5' INS VNTR and the third intron of the gene for insulin-like growth factor II (IGF2).
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1944595
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Our results strongly support the existence of a gene or genes affecting HLA-DR4 IDDM susceptibility which is located in a 19-kilobase region of INS-IGF2.
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6 |
8565331
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Imprinting of IGF2, insulin-dependent diabetes, immune function, and apoptosis: a hypothesis.
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8565331
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Examples include the Prader-Willi, Angelman, and Beckwith-Wiedemann syndromes [Nicholls (1994): Am J Hum Genet 54:733-740], malignancy [Sapienza (1990): Biochim Biophys Acta 1072:51-61; Feinberg (1993): Nat Genet 4:110-113], and insulin-dependent diabetes mellitus (IDDM) [Julier et al. (1994) Nature 354:155-159; Bennett et al. (1995) Nat Genet 9:284-292].
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8565331
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We review the evidence that implicates an imprinted gene in the INS-IGF2 region of chromosome 11p15 in the etiology of IDDM (referred to as the IDDM2 locus) and show that in human fetal pancreas, INS is not imprinted, thus providing an argument against INS as the candidate gene.
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8565331
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We also examine imprinting effects on the expression of IGF2 in components of the human immune system believed to be important in IDDM and show imprinted expression in fetal thymus as early as 15 weeks gestation.
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8565331
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Finally, we review the current available data supporting a role for insulin-like growth factor-II (IGF-II) in the immune system and, more specifically, discuss the evidence supporting a role for the IGFs in the prevention of apoptosis.
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23935095
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INS-IGF2 consists of the preproinsulin signal peptide, the insulin B-chain, and eight amino acids of the C-peptide in addition to 138 amino acids from the IGF2 gene.
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23935095
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Displacement with cold insulin and INS-IGF2 revealed that more patients than controls had doubly reactive insulin-INS-IGF2 autoantibodies.
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23935095
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INS-IGF2 and insulin may share autoantibody-binding sites, thus complicating the notion that insulin is the primary autoantigen in type 1 diabetes.
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14 |
23935095
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INS-IGF2 consists of the preproinsulin signal peptide, the insulin B-chain, and eight amino acids of the C-peptide in addition to 138 amino acids from the IGF2 gene.
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23935095
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Displacement with cold insulin and INS-IGF2 revealed that more patients than controls had doubly reactive insulin-INS-IGF2 autoantibodies.
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16 |
23935095
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INS-IGF2 and insulin may share autoantibody-binding sites, thus complicating the notion that insulin is the primary autoantigen in type 1 diabetes.
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17 |
23935095
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INS-IGF2 consists of the preproinsulin signal peptide, the insulin B-chain, and eight amino acids of the C-peptide in addition to 138 amino acids from the IGF2 gene.
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18 |
23935095
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Displacement with cold insulin and INS-IGF2 revealed that more patients than controls had doubly reactive insulin-INS-IGF2 autoantibodies.
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19 |
23935095
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INS-IGF2 and insulin may share autoantibody-binding sites, thus complicating the notion that insulin is the primary autoantigen in type 1 diabetes.
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