A genome-wide association study of nonsynonymous SNPs identifies a type 1 diabetes locus in the interferon-induced helicase (IFIH1) region

DJ Smyth, JD Cooper, R Bailey, S Field, O Burren… - Nature …, 2006 - nature.com
DJ Smyth, JD Cooper, R Bailey, S Field, O Burren, LJ Smink, C Guja, C Ionescu-Tirgoviste…
Nature genetics, 2006nature.com
In this study we report convincing statistical support for a sixth type 1 diabetes (T1D) locus in
the innate immunity viral RNA receptor gene region IFIH1 (also known as mda-5 or Helicard)
on chromosome 2q24. 3. We found the association in an interim analysis of a genome-wide
nonsynonymous SNP (nsSNP) scan, and we validated it in a case-control collection and
replicated it in an independent family collection. In 4,253 cases, 5,842 controls and 2,134
parent-child trio genotypes, the risk ratio for the minor allele of the nsSNP rs1990760 A→ G …
Abstract
In this study we report convincing statistical support for a sixth type 1 diabetes (T1D) locus in the innate immunity viral RNA receptor gene region IFIH1 (also known as mda-5 or Helicard) on chromosome 2q24.3. We found the association in an interim analysis of a genome-wide nonsynonymous SNP (nsSNP) scan, and we validated it in a case-control collection and replicated it in an independent family collection. In 4,253 cases, 5,842 controls and 2,134 parent-child trio genotypes, the risk ratio for the minor allele of the nsSNP rs1990760 A → G (A946T) was 0.86 (95% confidence interval = 0.82–0.90) at P = 1.42 × 10−10.
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