title: RAD51 135G>C polymorphism and breast cancer risk: a meta-analysis.
abstract: Mutations in RAD51 gene are believed to be associated with elevated breast cancer risk. However, several case-control studies focusing on the association between RAD51 135G>C and breast cancer risk failed to achieve consensus. To clarify the effect of RAD51 135G>C polymorphism on breast cancer, a meta-analysis was performed. By searching PubMed and EMBASE, a total of 14 case-control studies, containing 12,183 cases and 10,183 controls, were included. The strength of association between RAD51 135G>C polymorphism and breast cancer risk was assessed by odds ratio (OR) with the corresponding 95% confidence interval (95% CI). When all the eligible studies were pooled into the meta-analysis, an elevated cancer risk was revealed in additive model (OR, 1.34; 95% CI, 1.01-1.78; P = 0.044) and recessive model (OR, 1.37; 95% CI, 1.03-1.82; P = 0.032). In subgroup analyses by ethnicity, BRCA1/2 mutation status, and family history, a significant association was found only among BRCA2 mutation carriers (additive model: OR, 4.92; 95% CI, 1.11-21.83; P = 0.036; recessive model: OR, 4.88; 95% CI, 1.10-21.67; P = 0.037). Sensitivity analysis did not perturb the results. In conclusion, this meta-analysis suggests that RAD51 variant 135C homozygote is associated with elevated breast cancer risk among BRCA2 mutation carriers.
authors.affiliation: Department of Respiration, Changhai Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China. gwzhou41@163.com
authors.forename: Guo-Wu
authors.initials: GW
authors.lastname: Zhou
authors.forename: Jia
authors.initials: J
authors.lastname: Hu
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Peng
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
mesh_terms: D044466:Asian People; D044383:Black People; D001943:Breast Neoplasms / Q000453:epidemiology / Q000208:ethnology / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D019398:Genes, BRCA1; D024522:Genes, BRCA2; D020022:Genetic Predisposition to Disease; D006801:Humans; D007585:Jews; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D051135:Rad51 Recombinase / Q000235:genetics*; D012306:Risk; D012307:Risk Factors; D044465:White People
chemical_list: C495153:RAD51 protein, human; D051135:Rad51 Recombinase