European ancestry and polymorphisms in DNA repair genes modify the risk of melanoma: a case-control study in a high UV index region in Brazil.

Abstract:

BACKGROUND:UV radiation is the major environmental factor related to development of cutaneous melanoma. Besides sun exposure and the influence of latitude, some host characteristics such as skin phototype and hair and eye color are also risk factors for melanoma. Polymorphisms in DNA repair genes could be good candidates for susceptibility genes, mainly in geographical regions exposed to high solar radiation. OBJECTIVE:Evaluate the role of host characteristics and DNA repair polymorphism in melanoma risk in Brazil. METHODS:We carried out a hospital-based case-control study in Brazil to evaluate the contribution of host factors and polymorphisms in DNA repair to melanoma risk. A total of 412 patients (202 with melanoma and 210 controls) were analyzed regarding host characteristics for melanoma risk as well as for 11 polymorphisms in DNA repair genes. RESULTS:We found an association of host characteristics with melanoma development, such as eye and hair color, fair skin, history of pigmented lesions removed, sunburns in childhood and adolescence, and also European ancestry. Regarding DNA repair gene polymorphisms, we found protection for the XPG 1104 His/His genotype (OR 0.32; 95% CI 0.13-0.75), and increased risk for three polymorphisms in the XPC gene (PAT+; IV-6A and 939Gln), which represent a haplotype for XPC. Melanoma risk was higher in individuals carrying the complete XPC haplotype than each individual polymorphism (OR 3.64; 95% CI 1.77-7.48). CONCLUSIONS:Our data indicate that the host factors European ancestry and XPC polymorphisms contributed to melanoma risk in a region exposed to high sun radiation.

journal_name

J Dermatol Sci

authors

Gonçalves FT,Francisco G,de Souza SP,Luiz OC,Festa-Neto C,Sanches JA,Chammas R,Gattas GJ,Eluf-Neto J

doi

10.1016/j.jdermsci.2011.06.003

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

59-66

issue

1

eissn

0923-1811

issn

1873-569X

pii

S0923-1811(11)00177-0

journal_volume

64

pub_type

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