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Alleles of the IL12B 3′UTR associate with late onset of type 1 diabetes

Windsor, L., Morahan, G., Huang, D., McCann, V., Jones, T., James, I., Christiansen, F.T. and Price, P. (2004) Alleles of the IL12B 3′UTR associate with late onset of type 1 diabetes. Human Immunology, 65 (12). pp. 1432-1436.

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Carriage of a polymorphism in the 3′untranslated region of the IL12B gene encoding IL-12p40 was investigated in subjects with type 1 diabetes mellitus stratified by age at diagnosis (n = 648) and compared with a population-based control cohort (n = 246) residing in Western Australia. DNA samples were genotyped by polymerase chain reaction-restriction fragment length polymorphism or pyrosequencing. The C allele was more common in patients diagnosed after age 16 years than in controls (29% vs 17%, OR = 2.0, 95% CI = 1.4-2.7, p = 0.00003) or than in patients diagnosed when younger age 16 years (29% vs 22%, OR = 1.4, 95% CI = 1.1-1.9, p = 0.01). This reflected increases in homozygous and heterozygous carriage of the C allele. Heterozygosity was associated with a delayed disease in the late-onset diabetics (p = 0.005; Student's t-test). The effects of IL12B 3′untranslated region alleles on type 1 diabetes mellitus may reflect different levels of p40 available to form p40 homodimer, IL-12 (p35p40), and IL-23 (p19p40).

Item Type: Journal Article
Murdoch Affiliation(s): Centre for Clinical Immunology and Biomedical Statistics
Publisher: Elsevier BV
Copyright: © American Society for Histocompatibility and Immunogenetics, 2004
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