PMID- 1961115 OWN - NLM STAT- MEDLINE DCOM- 19920107 LR - 20190725 IS - 0026-0495 (Print) IS - 0026-0495 (Linking) VI - 40 IP - 12 DP - 1991 Dec TI - HLA-DR and the 5' insulin gene polymorphism in insulin-dependent diabetes. PG - 1244-8 AB - While the human leukocyte antigen (HLA) region provides the major susceptibility for insulin-dependent (type I) diabetes mellitus (IDDM), other (non-HLA) genes must also play a role. Population studies have shown an increased frequency of small insertions (class I alleles) 5' to the insulin gene in individuals with IDDM, suggesting that this region may account for part, if not all, of the non-HLA genetic predisposition. However, no data are available as to whether the relation of the insulin gene polymorphism is to a DR-defined subset of IDDM or with all of IDDM. To test the hypothesis that specific combinations of HLA and insulin gene polymorphism alleles may interact in providing susceptibility for IDDM, HLA-DR and 5' insulin gene insertion size have been determined in 300 individuals with IDDM. The frequency of class 1 insulin gene alleles in the entire sample is 0.79 and the frequency of class 3 alleles (large inserts) is 0.20. The frequencies of class 1 alleles were equal across all DR classes: 0.79 in the DR3/X IDDM subjects, 0.80 in the DR4/X, 0.79 in the DR3/4, and 0.78 in those with DRX/X. Additionally, the frequencies of class 1/1 homozygotes and 1/3 heterozygotes were similar between HLA-DR types. These results suggest that the HLA region and the region 5' to the insulin gene provide independent and nonsynergistic genetic risks for IDDM. FAU - Raffel, L J AU - Raffel LJ AD - Department of Pediatrics, University of Maryland School of Medicine, Baltimore. FAU - Vadheim, C M AU - Vadheim CM FAU - Klein, R AU - Klein R FAU - Moss, S E AU - Moss SE FAU - Riley, W J AU - Riley WJ FAU - Maclaren, N K AU - Maclaren NK FAU - Rotter, J I AU - Rotter JI LA - eng GR - AM 01421/AM/NIADDK NIH HHS/United States GR - EY 05369/EY/NEI NIH HHS/United States GR - HD 19469/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Metabolism JT - Metabolism: clinical and experimental JID - 0375267 RN - 0 (HLA-DR Antigens) RN - 0 (Insulin) SB - IM MH - Diabetes Mellitus, Type 1/*genetics/immunology MH - Gene Frequency MH - *Genes MH - HLA-DR Antigens/*analysis MH - Humans MH - Insulin/*genetics MH - *Polymorphism, Genetic EDAT- 1991/12/01 00:00 MHDA- 1991/12/01 00:01 CRDT- 1991/12/01 00:00 PHST- 1991/12/01 00:00 [pubmed] PHST- 1991/12/01 00:01 [medline] PHST- 1991/12/01 00:00 [entrez] AID - 0026-0495(91)90023-P [pii] AID - 10.1016/0026-0495(91)90023-p [doi] PST - ppublish SO - Metabolism. 1991 Dec;40(12):1244-8. doi: 10.1016/0026-0495(91)90023-p.