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    J Perinatol. 2008 Mar;28(3):211-7. Epub 2008 Feb 14.

    Cord blood islet autoantibodies and seasonal association with the type 1 diabetes high-risk genotype.

    Lynch KF, Lernmark B, Merlo J, Cilio CM, Ivarsson SA, Lernmark A; Diabetes Prediction in Skåne (DiPiS) Study Group.

    Collaborators (19)
    Almgren P, Gustavsson B, Buveris-Svendburg B, Carlsson A, Cederwall E, Hansson G, Hansson I, Jönsson B, Kockum K, Larsson HE, Larsson K, Lindehammer S, Lindberg B, Neiderud J, Nilsson A, Pelkonen M, Heins J, Shalonie A, Sjöblad S.

    Department of Clinical Sciences, University Hospital MAS, Lund University, Malmö, Sweden. kristian.lynch@med.lu.se

    OBJECTIVE: Human leukocyte antigen DQ (HLA-DQ) genetic factors and islet autoantibodies are strongly associated with type 1 diabetes (T1D) and are currently used to predict T1D. This study examined whether islet autoantibodies in the cord blood of newborns to nondiabetic mothers were associated with the (T1D) high-risk genotype HLA-DQ2/8, gestational infections or both. STUDY DESIGN: Cord blood samples were taken from 33 683 newborns and used for HLA typing and analyses of islet autoantibodies. Parents completed questionnaires when the child was 2 months of age. RESULT: The prevalence of newborn islet autoantibodies consistently varied with season over 4 years (P<0.0001); lowest in first quarter (1.2%) and highest in third (2.4%). Cord blood islet autoantibodies were associated with HLA-DQ2/8 in the second (OR, 2.30; P=0.02), third (OR, 2.12; P=0.008) and fourth quarters (OR, 2.49; P=0.007), but not in the first (OR, 1.13). Reported gastroenteritis was additionally associated with islet autoantibodies in the third quarter (OR, 1.80, P=0.04). CONCLUSION: An association between HLA and islet autoimmunity may depend on environmental exposure during pregnancy. Follow-up of mothers and children will determine risk of T1D.

    PMID: 18273032 [PubMed - indexed for MEDLINE]

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