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  • Title: Effect of human leukocyte antigen class II genes on acute-onset and slow-onset type 1 diabetes in the Japanese population.
    Author: Katahira M, Segawa S, Maeda H, Yasuda Y.
    Journal: Hum Immunol; 2010 Aug; 71(8):789-94. PubMed ID: 20510319.
    Abstract:
    The contribution of the human leukocyte antigen (HLA) subtype to slow-onset type 1 diabetes (T1D), which includes latent autoimmune diabetes in adults (LADA), remains unclear in the Japanese population. We compared the frequencies of HLA DR-DQ haplotypes and genotypes of 72 acute-onset T1D patients, 100 slow-onset T1D patients, and 292 control subjects. The frequencies of DRB1*0405-DQB1*0401 (DR4) and DRB1*1302-DQB1*0604 (DR13) haplotypes were significantly higher in acute-onset patients, whereas that of the DRB1*1502-DQB1*0601 haplotype was significantly lower than those in slow-onset diabetes patients and controls. In contrast, DRB1*0802-DQB1*0302 (DR8) and DRB1*0901-DQB1*0303 (DR9) haplotypes were significantly more frequent, and the DRB1*1501-DQB1*0602 haplotype was extremely rare, in acute-onset patients and slow-onset diabetes patients. Genotype analysis revealed that DR4/9, DR4/13, and DR9/13 in acute-onset patients indicated high odds ratios (6.81, 12.0, and 15.6, respectively), whereas DR4/8 was significantly more frequent in slow-onset diabetes patients, but not in acute-onset patients. Our study demonstrated for the first time that the DR8 haplotype confers susceptibility to slow-onset T1D in the Japanese population. Moreover, there potentially are hierarchies for predisposing haplotypes, namely, DR13 > DR4 > DR9 > DR8 and for protective haplotypes, namely, DRB1*1501-DQB1*0602 > DRB1*1502-DQB1*0601.
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