title: XRCC1 gene polymorphisms and breast cancer risk in different populations: a meta-analysis.
abstract: We performed a meta-analysis to investigate the role of XRCC1 polymorphisms Arg194Trp, Arg280His and Arg399Gln in breast cancer. The results were pooled in a manner that appropriately reflects a biological model of gene effect using a random effects logistic regression model without multiple comparisons. Forty studies from 31 reports were included with 10 465 cases and 10 888 controls at Arg194Trp, 6156 cases and 5806 controls at Arg280His, and 21 467 cases and 22 766 controls at Arg399Gln. Our analysis found a tendency towards a recessive effect of Arg280His variant in Asian population only (His/His vs. Arg/Arg+Arg/His: OR=2.27, 95% CI=0.82, 6.31). An increased breast cancer risk with a recessive effect was also suggested for Arg399Gln variant in Asian population (Gln/Gln vs. Arg/Arg+Arg/Gln: OR=1.59, 95% CI=1.22, 2.09) only. These findings suggest that polymorphisms Arg280His and Arg399Gln may modify breast cancer risk differently in Caucasian and Asian populations.
authors.affiliation: Clinical Trials and Epidemiological Sciences, National Cancer Centre, 11 Hospital Drive, Singapore 169610, Republic of Singapore. ctelhh@nccs.com.sg
authors.forename: Huihua
authors.initials: H
authors.lastname: Li
authors.forename: Tam Cam
authors.initials: TC
authors.lastname: Ha
authors.forename: Bee Choo
authors.initials: BC
authors.lastname: Tai
mesh_terms: D044466:Asian People / Q000235:genetics* / Q000706:statistics & numerical data; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics*; D004260:DNA Repair / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics*; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006801:Humans; D016015:Logistic Models; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D018570:Risk Assessment; D044465:White People / Q000235:genetics* / Q000706:statistics & numerical data; D000076105:X-ray Repair Cross Complementing Protein 1; D051759:Xeroderma Pigmentosum Group D Protein / Q000235:genetics
chemical_list: D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human; D051759:Xeroderma Pigmentosum Group D Protein