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Role of glutathione S ‐transferases in melanoma susceptibility: association with GSTP1 rs1695 polymorphism
Author(s) -
IbarrolaVillava M.,
MartinGonzalez M.,
Lazaro P.,
Pizarro A.,
Lluch A.,
Ribas G.
Publication year - 2012
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1111/j.1365-2133.2012.10831.x
Subject(s) - gstp1 , genotype , single nucleotide polymorphism , odds ratio , biology , genetics , glutathione s transferase , penetrance , allele , glutathione , medicine , gene , phenotype , enzyme , biochemistry
Summary Background Glutathione S ‐transferases (GSTs) GSTM1, GSTT1 and GSTP1 are multifunctional enzymes involved in the detoxification of a wide range of reactive oxygen species produced during melanin synthesis and oxidative stress processes. Objectives Single nucleotide polymorphisms (SNPs) in GSTP1 and copy number variants in GSTM1 and GSTT1 may be candidate low‐penetrance variants with a role in susceptibility to malignant melanoma (MM). Methods In this case–control study, 562 Spanish patients with sporadic MM and 338 cancer‐free control subjects were included, and the role of polymorphisms in these GST genes was investigated. Genotypes were established by quantitative real‐time polymerase chain reaction for GSTM1 and GSTT1 while TaqMan probes were used to genotype GSTP1 SNPs. Results The GSTP1 polymorphism rs1695, which encodes the amino acid change p.Ile105Val, was individually associated with MM [odds ratio (OR): 1·32, 95% confidence interval (CI): 1·06–1·63]. Furthermore, individuals carrying one or two MC1R nonsynonymous changes and GSTP1 rs1695 rare allele had an increased risk of developing MM (OR: 3·34, 95% CI: 1·42–8·09 and OR: 20·42, 95% CI: 2·80–417·42, respectively). Conclusions This is the first time that the GSTP1 rs1695 polymorphism is reported to be associated with MM. In addition, this study is one of the largest GST polymorphism studies undertaken in the Spanish population and the first time that copy number variants have been scrutinized in relation to MM.