title: Immunogenetic heterogeneity in type 1 (insulin-dependent) diabetes among Japanese HLA antigens and organ-specific autoantibodies.
abstract: HLA phenotypes and haplotypes in relation to organ-specific autoantibody responses were studied in 82 Japanese patients with Type 1 (insulin-dependent) diabetes. HLA-DRw9 antigen and HLA phenotype of DRw9/X (X:not DR4) were increased in patients with organ-specific autoantibodies other than islet cell antibody (CP less than 0.02, RR = 4.02 and p less than 0.05 RR = 2.30, respectively); whereas HLA-DR4 antigen and HLA phenotype of DR4/X (X: not DRw9) were increased in those without the autoantibodies (CP less than 0.001, RR = 3.95 and p less than 0.01, RR = 2.46, respectively). HLA haplotype of Bw61-DRw9 was increased in patients with the autoantibodies (p less than 0.005, RR = 4.94), and HLA haplotype of Bw54-DR4 was increased in those without the autoantibodies (p less than 0.001, RR = 5.52). The relative risk of HLA-DR4/DRw9 was the highest among all HLA-DR phenotypes or genotypes in patients either with or without the autoantibodies. No association was, however, found between the incidence of islet cell antibody and HLA-DR phenotypes. These findings suggest that Type 1 diabetes among Japanese is immunogenetically heterogeneous as is Type 1 diabetes among Caucasians; and the differences in HLA-association of Type 1 diabetes among ethnic groups might give a clue to understanding of a role of HLA-antigens in the development of Type 1 diabetes.
authors.affiliation: Department of Paediatrics, Ehime University School of Medicine, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kida
authors.forename: G
authors.initials: G
authors.lastname: Mimura
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Nakamura
authors.forename: S
authors.initials: S
authors.lastname: Sonoda
authors.forename: H
authors.initials: H
authors.lastname: Inouye
authors.forename: K
authors.initials: K
authors.lastname: Tsuji
mesh_terms: D001323:Autoantibodies / Q000032:analysis*; D003922:Diabetes Mellitus, Type 1 / Q000276:immunology*; D006680:HLA Antigens / Q000032:analysis* / Q000235:genetics; D006684:HLA-DR Antigens / Q000032:analysis; D006239:Haplotypes; D006801:Humans; D007515:Islets of Langerhans / Q000276:immunology*; D007564:Japan; D010641:Phenotype; D012016:Reference Values
chemical_list: D001323:Autoantibodies; D006680:HLA Antigens; D006684:HLA-DR Antigens; C024211:islet cell antibody