Relationship between polymorphisms in homologous recombination repair genes RAD51 G172T?XRCC2 & XRCC3 and risk of breast cancer: A meta-analysis

作者全名:"Yu, Jiayang; Wang, Chun-Guang"

作者地址:"[Yu, Jiayang; Wang, Chun-Guang] Yongchuan Hosp Chongqing Med Univ, Dept Oncol, Chongqing, Peoples R China"

通信作者:"Wang, CG (通讯作者),Yongchuan Hosp Chongqing Med Univ, Dept Oncol, Chongqing, Peoples R China."












关键词:breast neoplasms; Rad51 recombinase; single nucleotide polymorphism; DNA repair mechanism mutations; meta-analysis

摘要:"BackgroundGenetic variability in DNA double-strand break repair genes such as RAD51 gene and its paralogs XRCC2?XRCC3 may contribute to the occurrence and progression of breast cancer. To obtain a complete evaluation of the above association, we performed a meta-analysis of published studies. MethodsElectronic databases, including PubMed, EMBASE, Web of Science, and Cochrane Library, were comprehensively searched from inception to September 2022. The Newcastle-Ottawa Scale (NOS) checklist was used to assess all included non-randomized studies. Odds ratios (OR) with 95% confidence intervals (CI) were calculated by STATA 16.0 to assess the strength of the association between single nucleotide polymorphisms (SNPs) in these genes and breast cancer risk. Subsequently, the heterogeneity between studies, sensitivity, and publication bias were performed. We downloaded data from The Cancer Genome Atlas (TCGA) and used univariate and multivariate Cox proportional hazard regression (CPH) models to validate the prognostic value of these related genes in the R software. ResultsThe combined results showed that there was a significant correlation between the G172T polymorphism and the susceptibility to breast cancer in the homozygote model (OR= 1.841, 95% CI=1.06-3.21, P=0.03). Furthermore, ethnic analysis showed that SNP was associated with the risk of breast cancer in Arab populations in homozygous models (OR=3.52, 95% CI=1.13-11.0, P= 0.003). For the XRCC2 R188H polymorphism, no significant association was observed. Regarding polymorphism in XRCC3 T241M, a significantly increased cancer risk was only observed in the allelic genetic model (OR=1.05, 95% CI= 1.00-1.11, P=0.04). ConclusionsIn conclusion, this meta-analysis suggests that Rad51 G172T polymorphism is likely associated with an increased risk of breast cancer, significantly in the Arab population. The relationship between the XRCC2 R188H polymorphism and breast cancer was not obvious. And T241M in XRCC3 may be associated with breast cancer risk, especially in the Asian population."

基金机构:Natural Science Foundation of Chongqing Yongchuan science and Technology Commission [Ycstc2018nb0208]

基金资助正文:Funding This work was supported by Natural Science Foundation of Chongqing Yongchuan science and Technology Commission (No. Ycstc2018nb0208).