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http://dx.doi.org/10.7314/APJCP.2012.13.7.3431

Association of Functional Polymorphisms of the XRCC4 Gene with the Risk of Breast Cancer: A Meta-analysis  

Zhou, Li-Ping (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Luan, Hong (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Dong, Xi-Hua (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Jin, Guo-Jiang (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Ma, Dong-Liang (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Shang, Hong (Department of Laboratory Medicine, the First Affiliated Hospital of China Medical University)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.13, no.7, 2012 , pp. 3431-3436 More about this Journal
Abstract
Objective: X-ray cross-complementing group 4 (XRCC4) is a major repair gene for DNA double-strand breaks (DSB) in the non-homologous end-joining (NHEJ) pathway. Several potentially functional polymorphisms of the XRCC4 gene have been implicated in breast cancer risk, but individually published studies showed inconclusive results. The aim of this meta-analysis was to investigate the association between XRCC4 polymorphisms and the risk of breast cancer. Methods: The MEDLINE, EMBASE, Web of science and CBM databases were searched for all relevant articles published up to June 20, 2012. Potential associations were assessed with comparisons of the total mutation rate (TMR), complete mutation rate (CMR) and partial mutation rate (PMR) in cases and controls. Statistical analyses were performed using RevMan 5.1.6 and STATA 12.0 software. Results: Five studies were included with a total of 5,165 breast cancer cases and 4,839 healthy controls. Meta-analysis results showed that mutations of rs2075686 (C>T) and rs6869366 (G>T) in the XRCC4 gene were associated with increased risk of breast cancer, while rs2075685 (G>T) and rs10057194 (A>G) might decrease the risk of breast cancer. However, rs1805377 (A>G), rs1056503 (G>T), rs28360317 (ins>del) and rs3734091 (A>G) polymorphisms of XRCC4 gene did not appear to have an influence on breast cancer susceptibility. Conclusion: Results from the current meta-analysis suggest that the rs2075685 (G>T) and rs6869366 (G>T) polymorphisms of the XRCC4 gene might increase the risk of breast cancer, whereas rs2075685 (G>T) and rs10057194 (A>G) might be protective factors.
Keywords
XRCC4; polymorphism; mutation; breast cancer; meta-analysis;
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