Erschienen in:
01.06.2007 | Epidemiology
DNA repair polymorphisms might contribute differentially on familial and sporadic breast cancer susceptibility: a study on a Portuguese population
verfasst von:
Sandra Costa, Daniela Pinto, Deolinda Pereira, Helena Rodrigues, Jorge Cameselle-Teijeiro, Rui Medeiros, Fernando Schmitt
Erschienen in:
Breast Cancer Research and Treatment
|
Ausgabe 2/2007
Einloggen, um Zugang zu erhalten
Abstract
The purpose of this study was to evaluate the role of polymorphisms in DNA repair genes as genetic indicators of susceptibility to familial and sporadic breast cancer. We analysed DNA samples from 285 breast cancer patients and 442 control subjects, for XRCC1
Arg399Gln, XPD
Lys751Gln, RAD51
G135C and XRCC3
Thr241Met polymorphisms using PCR-RFLP. We observed that women carriers of XRCC1
399Gln genotypes and without family history of breast cancer have a protective effect concerning this disease (OR = 0.54 95% CI 0.35–0.84; p = 0.006). Furthermore, we found that carriers of XRCC3
241Met genotypes without FH have an increased susceptibility of breast cancer (OR = 2.21 95% CI 1.42–3.44; p < 0.001). Additionally, we verified an increased risk of breast cancer in women with FH and carrying RAD51
135C genotypes (OR = 2.17 95% CI 1.19–3.98; p = 0.012). Our results suggest XRCC1
Arg399Gln and XRCC3
Thr241Met DNA repair polymorphisms as important biomarkers to sporadic breast cancer susceptibility, as well as, RAD51
G135C polymorphism as a real risk modifier in familial breast cancer cases.