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Gestational respiratory infections interacting with offspring HLA and CTLA-4 modifies incident beta-cell autoantibodies.
J. Autoimmun. 86, 93-103 (2018)
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beta-cell autoantibodies against insulin (IAA), GAD65 (GADA) and IA-2 (IA-2A) precede onset of childhood type 1 diabetes (T1D). Incidence of the first appearing beta-cell autoantibodies peaks at a young age and is patterned by T1D-associated genes, suggesting an early environmental influence. Here, we tested if gestational infections and interactions with child's human leukocyte antigen (HLA) and non-HLA genes affected the appearance of the first beta-cell autoantibody. Singletons of mothers without diabetes (n = 7472) with T1D-associated HLA-DR-DQ genotypes were prospectively followed quarterly through the first 4 years of life, then semiannually until age 6 years, using standardized autoantibody analyses. Maternal infections during pregnancy were assessed via questionnaire 3-4.5 months post-delivery. Polymorphisms in twelve non-HLA genes associated with the first appearing beta-cell autoantibodies were included in a Cox regression analysis. IAA predominated as the first appearing beta-cell autoantibody in younger children (n = 226, median age at seroconversion 1.8 years) and GADA (n = 212; 3.2 years) in children aged >= 2 years. Gestational infections were not associated with the first appearing beta-cell autoantibodies overall. However, gestational respiratory infections (G-RI) showed a consistent protective influence on IAA (HR 0.64, 95% CI 0.45-0.91) among CTLA4-(AG, GG) children (G-RI*CTLA4 interaction, p = 0.002). The predominant associations of HLA-DR-DQ4-8/8-4 with IAA and HLA-DR-DQ 3-2/3-2 with GADA were not observed if a G-RI was reported (G-RI*HLA-DR-DQ interaction, p = 0.03). The role of G-RI may depend on offspring HLA and CTLA-4 alleles and supports a bidirectional trigger for IAA or GADA as a first appearing beta-cell autoantibody in early life. (C) 2017 Elsevier Ltd. All rights reserved.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Beta-cell Autoantibodies ; Glutamic Acid Decarboxylase ; Ia-2 ; Insulin ; Hla ; Autoimmunity ; Type 1 Diabetes ; Autoimmune Diabetes; Type-1 Diabetes-mellitus; Cord Blood; Islet Autoantibodies; Birth-weight; Risk-factor; Enterovirus Infection; Cesarean-section; Young Daisy; Coxsackie-b; Population
ISSN (print) / ISBN 0896-8411
Zeitschrift Journal of Autoimmunity
Quellenangaben Band: 86, Seiten: 93-103
Institut(e) Institute of Diabetes Research Type 1 (IDF)