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  • Association between Thr241Met Polymorphism in XRCC3 Gene and the Risk of Lung Cancer in Chinese Population: A Meta-Analysis

    Objective To evaluate the association between the Thr241Met polymorphism in the XRCC3 gene and the risk of lung cancer in Chinese population by meta-analysis. Methods Databases including PubMed, EMbase, CNKI, VIP and WanFang Data were searched to identify domestic and foreign case-control studies concerning the association between Thr241Met polymorphism in XRCC3 gene and the risk of lung cancer in Chinese population from the inception to August 20th, 2013. Two reviewers independently screened the literature according to the inclusion and exclusion criteria, extracted data and assessed quality. Then meta-analysis was performed using RevMan 5.0 software and Stata 10.0 software. Results A total of 5 case-control studies involved 2 999 lung cancer cases and 2 994 controls were included. The results of meta-analysis showed that, Chinese population who carry the variant genotype or allele had no increased risk of lung cancer: Met/Met vs. Thr/Thr: OR=1.00, 95%CI (0.38, 2.59), P=0.99; Met/Met vs. Thr/Met: OR=1.06, 95%CI (0.83, 1.36), P=0.63; Met/Met vs. Thr/Met+Thr/Thr: OR=0.99, 95%CI (0.38, 2.57), P=0.98; Thr/Met+Met/Met vs. Thr/Thr: OR=1.06, 95%CI (0.82, 1.37), P=0.65; Met vs. Thr: OR=1.05, 95%CI (0.82, 1.35), P=0.68. Conclusion Currently, Thr241Met polymorphism in the XRCC3 gene is not found to be associated with the risk of lung cancer in Chinese population. Considering the limited quality of the included case-control studies, more high quality studies with large sample size are needed to verify the above conclusion.

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