Cesarean section and interferon-induced helicase gene polymorphisms combine to increase childhood type 1 diabetes risk.
Diabetes 60, 3300-3306 (2011)
OBJECTIVE The incidence of type 1 diabetes is increasing. Delivery by cesarean section is also more prevalent, and it is suggested that cesarean section is associated with type 1 diabetes risk. We examine associations between cesarean delivery, islet autoimmunity and type 1 diabetes, and genes involved in type 1 diabetes susceptibility. RESEARCH DESIGN AND METHODS Cesarean section was examined as a risk factor in 1,650 children born to a parent with type 1 diabetes and followed from birth for the development of islet autoantibodies and type 1 diabetes. RESULTS Children delivered by cesarean section (n = 495) had more than twofold higher risk for type 1 diabetes than children born by vaginal delivery (hazard ratio [HR] 2.5; 95% CI 1.4-4.3; P = 0.001). Cesarean section did not increase the risk for islet autoantibodies (P = 0.6) but was associated with a faster progression to diabetes after the appearance of autoimmunity (P = 0.015). Cesarean section-associated risk was independent of potential confounder variables (adjusted HR 2.7;1.5-5.0; P = 0.001) and observed in children with and without high-risk HLA genotypes. Interestingly, cesarean section appeared to interact with immune response genes, including CD25 and in particular the interferon-induced helicase 1 gene, where increased risk for type 1 diabetes was only seen in children who were delivered by cesarean section and had type 1 diabetes-susceptible IFIH1 genotypes (12-year risk, 9.1 vs. <3% for all other combinations; P < 0.0001). CONCLUSIONS These findings suggest that type 1 diabetes risk modification by cesarean section may be linked to viral responses in the preclinical autoantibody-positive disease phase.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Antibody standardization program; Autoantibody positivity; islet autoantibodies; German babydiab; young Daisy; Progression; Autoimmunity; Rates; Prediction; Microbiota
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Language
english
Publication Year
2011
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2011
ISSN (print) / ISBN
0012-1797
e-ISSN
1939-327X
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Volume: 60,
Issue: 12,
Pages: 3300-3306
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American Diabetes Association
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Alexandria, VA.
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Peer reviewed
POF-Topic(s)
30201 - Metabolic Health
Research field(s)
Helmholtz Diabetes Center
PSP Element(s)
G-502100-001
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Erfassungsdatum
2011-12-23