Association between three genetic variants in kallikrein 3 and prostate cancer risk.

The overall results indicated that polymorphism T>C of rs1058205 was associated with decreased risk of PCa (allele contrast: OR = 0.75, 95% CI = 0.64-0.88, P heterogeneity < 0.001; homozygote comparison: OR = 0.58, 95% CI = 0.42-0.81, P heterogeneity < 0.001), particularly in Caucasian population (allele contrast: OR = 0.77, 95% CI = 0.65-0.91, P heterogeneity < 0.001; homozygote comparison: OR = 0.58, 95% CI = 0.41-0.82, P heterogeneity < 0.001). No association was observed between the polymorphism A>G of rs2735839 and risk of PCa. In addition, no association was observed between polymorphism A>G of rs266882 and risk of PCa. Serum KLK3 levels in PCa patients carrying CC/CT genotypes were statistically lower than those carrying TT genotypes. Conclusion: This meta-analysis suggests that rs1058205 polymorphism of KLK3 is a risk factor for PCa development, polymorphism T>C of rs1058205 is associated with decreased susceptibility to PCa particularly in Caucasian population.