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Nat Genet. 2009 Aug;41(8):915-9. doi: 10.1038/ng.410. Epub 2009 Jul 5.

Genome-wide association study identifies variants at 9p21 and 22q13 associated with development of cutaneous nevi.

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  • 1Department of Twin Research & Genetic Epidemiology, Kings College London, St. Thomas' Hospital Campus, London, UK. m.falchi@imperial.ac.uk

Abstract

A high melanocytic nevi count is the strongest known risk factor for cutaneous melanoma. We conducted a genome-wide association study for nevus count using 297,108 SNPs in 1,524 twins, with validation in an independent cohort of 4,107 individuals. We identified strongly associated variants in MTAP, a gene adjacent to the familial melanoma susceptibility locus CDKN2A on 9p21 (rs4636294, combined P = 3.4 x 10(-15)), as well as in PLA2G6 on 22q13.1 (rs2284063, combined P = 3.4 x 10(-8)). In addition, variants in these two loci showed association with melanoma risk in 3,131 melanoma cases from two independent studies, including rs10757257 at 9p21, combined P = 3.4 x 10(-8), OR = 1.23 (95% CI = 1.15-1.30) and rs132985 at 22q13.1, combined P = 2.6 x 10(-7), OR = 1.23 (95% CI = 1.15-1.30). This provides the first report of common variants associated to nevus number and demonstrates association of these variants with melanoma susceptibility.

PMID:
19578365
[PubMed - indexed for MEDLINE]
PMCID:
PMC3080738
Free PMC Article

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