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J Invest Dermatol. 2010 Dec;130(12):2768-72. doi: 10.1038/jid.2010.214. Epub 2010 Jul 29.

Carriers of rare missense variants in IFIH1 are protected from psoriasis.

Author information

  • 1Celera, Alameda, California 94502, USA. yonghong.li@celera.com

Abstract

Testing of ∼25,000 putative functional single-nucleotide polymorphisms (SNPs) across the human genome in a genetic association study has identified three psoriasis genes, IL12B, IL23R, and IL13. We now report evidence for the association of psoriasis risk with missense SNPs in the interferon induced with helicase C domain 1 gene (IFIH1). The rare alleles of two independent SNPs were associated with decreased risk of psoriasis--rs35667974 (Ile923Val): odds ratio (OR) for minor allele carriers is 0.43, P=2.36 × 10(-5) (2,098 cases vs. 1,748 controls); and rs10930046 (His460Arg): OR for minor allele carriers is 0.51, P=6.47 × 10(-4) (2,098 cases vs. 1,744 controls). Compared to noncarriers, carriers of the 923Val and/or 460Arg variants were protected from psoriasis (OR=0.46, P=5.56 × 10(-8)). To our knowledge, these results suggest that IFIH1 is a previously unreported psoriasis gene.

PMID:
20668468
[PubMed - indexed for MEDLINE]
PMCID:
PMC3680368
Free PMC Article
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