Correlations between islet autoantibody specificity and the SLC30A8 genotype with HLA-DQB1 and metabolic control in new onset type 1 diabetes.

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  • Additional Information
    • Corporate Authors:
      Danish Study Group of Childhood Diabetes
    • Source:
      Publisher: Taylor & Francis Country of Publication: England NLM ID: 8900070 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1607-842X (Electronic) Linking ISSN: 08916934 NLM ISO Abbreviation: Autoimmunity Subsets: MEDLINE
    • Publication Information:
      Publication: 2015- : Abingdon, Oxford : Taylor & Francis
      Original Publication: Chur ; New York : Harwood, c1988-
    • Subject Terms:
      Antibody Specificity* ; Genetic Predisposition to Disease*; Autoantibodies/*blood ; Cation Transport Proteins/*genetics ; Diabetes Mellitus, Type 1/*immunology ; HLA-DQ Antigens/*genetics ; Insulin-Secreting Cells/*immunology; Adolescent ; Age of Onset ; Cation Transport Proteins/blood ; Cation Transport Proteins/immunology ; Child ; Child, Preschool ; Denmark/epidemiology ; Diabetes Mellitus, Type 1/epidemiology ; Diabetes Mellitus, Type 1/genetics ; Genotype ; Glutamate Decarboxylase/immunology ; HLA-DQ Antigens/metabolism ; HLA-DQ beta-Chains ; Humans ; Prevalence ; Zinc Transporter 8
    • Abstract:
      We hypothesised that the correlation between autoantibody specificity for the ZnT8 Arg325Trp isoforms and the type 2 diabetes-associated rs13266634 may affect β-cell function at type 1 diabetes (T1D) onset. To study this, we tested 482 newly diagnosed diabetic probands and 478 healthy siblings from the Danish population-based T1D registry for autoantibodies to ZnT8 (ZnT8A) in addition to GAD65 and IA-2. The prevalence and titres of autoantibodies were correlated with genotypes for rs13266634 and HLA-DQB1, age at diagnosis (AAD) and insulin dose-adjusted HbA1c (IDAA1c), as a proxy for residual β-cell function. We replicated the correlation between rs13266634 genotypes and specificity for the ZnT8-Argenine (ZnT8R) and ZnT8-Tryptophan (ZnT8W) isoforms previously reported. ZnT8A overlapped substantially with autoantibodies to glutamate decarboxylase 65 (GADA) and IA-2 (IA-2A) and correlated significantly with IA-2A prevalence (p < 2e-16). No effect on IDAA1c was demonstrated for ZnT8A or rs13266634. We found a correlation between ZnT8R positivity and HLA-DQB1*0302 genotypes (p = 0.016), which has not been shown previously. Furthermore, significantly lower ZnT8R and GADA prevalence and titres was found among probands with AAD < 5 years (prevalence: p = 0.004 and p = 0.0001; titres: p = 0.002 and p = 0.001, respectively). The same trend was observed for IA-2A and ZnT8W; however, the difference was non-significant. Our study confirms ZnT8 as a major target for autoantibodies at disease onset in our Danish T1D cohort of children and adolescents, and we have further characterised the relationship between autoantibody specificity for the ZnT8 Arg325Trp epitopes and rs13266634 in relation to established autoantibodies, AAD, measures of β-cell function and HLA-DQB1 genotypes in T1D.
    • Accession Number:
      0 (Autoantibodies)
      0 (Cation Transport Proteins)
      0 (HLA-DQ Antigens)
      0 (HLA-DQ beta-Chains)
      0 (HLA-DQB1 antigen)
      0 (ICA512 autoantibody)
      0 (SLC30A8 protein, human)
      0 (Zinc Transporter 8)
      EC 4.1.1.15 (Glutamate Decarboxylase)
      EC 4.1.1.15 (glutamate decarboxylase 2)
    • Publication Date:
      Date Created: 20100915 Date Completed: 20110524 Latest Revision: 20171116
    • Publication Date:
      20231215
    • Accession Number:
      10.3109/08916934.2010.509120
    • Accession Number:
      20836749