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

Author:
  • Kristian Lynch
  • Barbro Lernmark
  • Juan Merlo
  • Maria Roberta Cilio
  • S-A Ivarsson
  • Åke Lernmark
  • Annelie Carlsson
Publishing year: 2008
Language: English
Pages: 211-217
Publication/Series: Journal of Perinatology
Volume: 28
Issue: 3
Document type: Journal article
Publisher: Nature Publishing Group

Abstract english

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.Journal of Perinatology (2008) 28, 211-217; doi:10.1038/sj.jp.7211912; published online 14 February 2008.

Keywords

  • Environmental Health and Occupational Health
  • Endocrinology and Diabetes

Other

Published
  • Diabetes and Celiac Unit
  • Social Epidemiology
  • PediatricCeliaki/Diabetes
  • ISSN: 0743-8346
E-mail: ake [dot] lernmark [at] med [dot] lu [dot] se

Principal investigator

Diabetes and Celiac Unit

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Jan Waldenströms gata 35, Malmö

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Lund University Diabetes Centre, CRC, SUS Malmö, Jan Waldenströms gata 35, House 91:12. SE-214 28 Malmö. Telephone: +46 40 39 10 00