Genetic Polymorphisms of DNA Repair Genes XRCC1 and XRCC3 and Risk of Colorectal Cancer in Chinese Population

  • Zhao, Yi (Department of Gastrointestinal Surgery, Affiliated Shengjing Hospital of China Medical University) ;
  • Deng, Xin (Department of Gastrointestinal Surgery, Affiliated Shengjing Hospital of China Medical University) ;
  • Wang, Zhen (Department of Gastrointestinal Surgery, Affiliated Shengjing Hospital of China Medical University) ;
  • Wang, Qiang (Department of Gastrointestinal Surgery, Affiliated Shengjing Hospital of China Medical University) ;
  • Liu, Yixia (Department of Hepatobiliary Surgery, the West China Hospital, Sichuan University)
  • Published : 2012.02.29


Aim: The distribution of DNA repair gene XRCC1 and XRCC3 genotypes was used to assess the potential influence of genetic polymorphisms on risk of colorectal cancer, and interactions with other factors. Methods: a 1:2 matched case-control study was conducted with 485 cases and 970 controls. XRCC1 and XRCC2 genotype polymorphisms were based upon duplex polymerase-chain-reaction with the confronting-two-pairprimer (PCR-CTPP) method. Results:The XRCC1 399Cln allele polymorphism was found to be associated with an increased colorectal cancer risk, while an non-significant inversely association was noted for XRCC3 241Thr/Thr genotype. We also found that individuals with the XRCC1 399 Gln and XRCC3 241Met alleles had an elevated risk, while XRCC3241Thr/Thr was proctective. Conclusion: This study is the first to provide evidence of importance of XRCC1 and XRCC3 gene polymorphisms for risk of colorectal cancer in the Chinese population.


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