Pigmentation-related genes and their implication in malignant melanoma susceptibility

Exp Dermatol. 2009 Jul;18(7):634-42. doi: 10.1111/j.1600-0625.2009.00846.x. Epub 2009 Mar 6.

Abstract

Human pigmentation appears to be one of the main modulators of individual risk of developing malignant melanoma (MM). A large number of genes are known to be involved in rare pigmentary disorders and explain most of the variation in pigmentation phenotypes seen in human populations. This Spanish case-control study included 205 patients with melanoma and 245 control subjects. Thirty-one single nucleotide polymorphisms (SNPs) in genes that had been mainly associated with congenital pigmentation syndromes (ADTB3A, ATRN, CHS1, EDNRB, HPS, KIT, MGRN1, MITF, MLANA, MYO5A, MYO7A, OA1, OCA2, PAX3 and SOX10) were selected. We found that the variant allele of OCA2 R419Q (rs1800407) was associated with increased risk of MM (OR 1.55, 95% CI 1.04-2.31, P = 0.03). This effect on melanoma risk appeared to be stronger among individuals with solar lentigines, or at least 50 nevi. We also describe, for the first time, an association with the variant S1666C (rs2276288) in the MYO7A gene (OR 1.35; 95% CI 1.04-1.76; P = 0.03). Again, this association appeared to be stronger in several phenotypic groups such as individuals with fair skin and those with childhood sunburns. We also found that several variants in the pigmentation genes considered were associated with intermediate phenotypic characteristics. Our findings highlight the potential importance of pigmentation genes in sporadic MM susceptibility.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Case-Control Studies
  • Female
  • Genetic Predisposition to Disease / genetics*
  • Genotype
  • Humans
  • Male
  • Melanoma / ethnology
  • Melanoma / genetics*
  • Membrane Transport Proteins / genetics*
  • Middle Aged
  • Multivariate Analysis
  • Myosin VIIa
  • Myosins / genetics*
  • Phenotype
  • Pigmentation / genetics*
  • Polymorphism, Single Nucleotide / genetics*
  • Risk Factors
  • Skin Neoplasms / ethnology
  • Skin Neoplasms / genetics*
  • Spain

Substances

  • MYO7A protein, human
  • Membrane Transport Proteins
  • Myosin VIIa
  • OCA2 protein, human
  • Myosins