It indicated that XRCC1 R399Q and R194W might not be risk factors to bladder cancer, but the 399QQ genotype decreased susceptibility of bladder cancer under recessive model and homozygote contrast among ever-smokers.
APEX1 rs3136817, MUTYH rs3219493, three SNPs (rs3213356, rs25487 and rs1799782) in XRCC1, and three SNPs (rs1799794, rs861531 and rs861530) in XRCC3 showed significant associations with the risk of bladder cancer.
Our meta-analysis shows that XRCC1 Arg194Trp and Arg280His polymorphisms are associated with a significantly increased risk of bladder cancer in Asian population.
Our meta-analysis results suggest that XRCC1Arg194Trp and Arg280His polymorphisms are associated with significantly increased risk of bladder cancer in Asians.
For Arg(194)Trp (six studies, 3091 cases, 3219 controls), no evidence indicated that individuals carrying the variant genotypes (Trp/Trp + Arg/Trp), relative to those carrying the wild homozygote Arg/Arg genotype, had a decreased risk of bladder cancer (odds ratio [OR] 0.90, 95% confidence interval [CI] 0.77 to 1.05; P = 0.17).