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http://dx.doi.org/10.7314/APJCP.2012.13.1.111

XRCC1-77T>C Polymorphism and Cancer Risk: A Meta-analysis  

Wang, Yong-Gang (Department of Chemotherapy, Cancer Center, Qilu Hospital, Shandong University)
Zheng, Tian-Ying (Department of Chemotherapy, Cancer Center, Qilu Hospital, Shandong University)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.13, no.1, 2012 , pp. 111-115 More about this Journal
Abstract
Variants of X-ray repair cross-complementing group 1 (XRCC1) are involved in the development of cancer, but studies investigating the association of XRCC1-77T>C polymorphism with cancer risk have reported conflicting results. To clarify the effect of the XRCC1 -77T>C polymorphism on cancer risk, we performed a meta-analysis by conducting searches of the published literature in PubMed, Embase and CBM databases. Finally, 13 studies were included into our meta-analysis, involving a total of 11, 678 individuals. Subgroup analyses were performed by ethnicity and cancer type. The results of this meta-analysis showed that there was significant association between the C variant of XRCC1-77T>C polymorphism and cancer risk in all four genetic comparison models (ORC vs. T =1.19, 95%CI 1.07-1.31, P = 0.001; OR homozygote model =1.28, 95%CI 1.07-1.52, P = 0.007; OR recessive genetic model =1.22, 95%CI 1.04-1.44, P = 0.015; OR dominant model =1.21, 95% CI 1.07-1.35, P = 0.001). In the subgroup analyses based on ethnicity, the association was still significant in the Asian population (all p values<0.001), but not in the Caucasian population (all p values > 0.05). Thus, the XRCC1 -77T>C polymorphism is associated with cancer risk, and individuals with XRCC1 -77C variant have a significantly higher cancer risk, particularly in the Asian population.
Keywords
XRCC1; cancer; genetic polymorphism; meta-analysis;
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