Genetic analysis of three important genes in pigmentation and melanoma susceptibility: CDKN2A, MC1R and HERC2/OCA2

Experimental Dermatology
Maider Ibarrola-VillavaGloria Ribas

Abstract

The CDKN2A gene is regarded as the major familial malignant melanoma (MM) susceptibility gene. Human pigmentation is one of the main modulators of individual risk of developing MM. Therefore, the genes involved in the determination of skin colour and tanning response are potentially implicated in MM predisposition and may be useful predictors of MM risk in the general population. The human melanocortin-1 receptor gene (MC1R) plays a crucial role in pigmentation and also appears to be important in MM. The OCA2 gene has emerged as a new and significant determinant of human iris colour variation. We present a case-control study in Spanish population including 390 consecutive patients with melanoma and 254 control subjects. Sequence analysis of the entire coding region and genotyping of 5 tag-SNPs in the genomic region of MC1R was performed. We identified 27 variants, two reaching statistical significance [R160W (OR: 4.18, 95% CI: 1.24-14.04, P = 0.02) and D294H (OR: 3.10, 95% CI: 1.37-7.01, P = 0.01)] and we detected two novel non-synonymous changes: V92L and T308M. Odds ratio for carrying two functional variants was 4.25 (95% CI: 2.30-7.84, P = 3.63 x 10(-6)). Haplotypes of the entire MC1R region have been established, and we obs...Continue Reading

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Jul 3, 2013·BMC Cancer·Livia MaccioniRajiv Kumar
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Dec 18, 2013·The Journal of Investigative Dermatology·Maider Ibarrola-VillavaGloria Ribas
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Jul 6, 2018·Photodermatology, Photoimmunology & Photomedicine·Barbara HernandoConrado Martinez-Cadenas
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