摘要
Objective：The cytochrome P450 17α-hydroxylase（CYP17）plays a vital role in androgen biosynthesis.A T-to-C polymorphism in the 5＇promoter region of CYP17 has been implicated as a risk factor for prostate cancer,but the results of individual studies are inconclusive or controversial.To derive a more precise estimation of the relationship,we performed an updated meta-analysis from 31 studies based on 27 publications.Methods：A comprehensive search was conducted to examine all the eligible studies of CYP17 polymorphism and prostate cancer risk.We used odds ratios（ORs）with 95%confidence intervals（CIs）to assess the strength of the association.Results：Overall,individuals with CC/CT genotype were not associated with prostate cancer risk （CC vs.TT：OR=1.03,95%CI=0.86-1.24,P=0.72,P heterogeneity 〈0.0001;CT vs.TT：OR=0.99,95%CI=0.87- 1.12,P=0.88,P heterogeneity =0.0006）.In the stratified analysis by ethnicity,there was a significantly increased risk of prostate cancer among individuals of African descent under the recessive model（OR=1.56,95%CI=1.01- 2.39,P=0.04,P heterogeneity =0.65）.Conclusion：This meta-analysis suggested that CYP17 polymorphism might be associated with prostate cancer risk among individuals of African descent.
Objective：The cytochrome P450 17α-hydroxylase（CYP17）plays a vital role in androgen biosynthesis.A T-to-C polymorphism in the 5＇promoter region of CYP17 has been implicated as a risk factor for prostate cancer,but the results of individual studies are inconclusive or controversial.To derive a more precise estimation of the relationship,we performed an updated meta-analysis from 31 studies based on 27 publications.Methods：A comprehensive search was conducted to examine all the eligible studies of CYP17 polymorphism and prostate cancer risk.We used odds ratios（ORs）with 95%confidence intervals（CIs）to assess the strength of the association.Results：Overall,individuals with CC/CT genotype were not associated with prostate cancer risk （CC vs.TT：OR=1.03,95%CI=0.86-1.24,P=0.72,P heterogeneity 〈0.0001;CT vs.TT：OR=0.99,95%CI=0.87- 1.12,P=0.88,P heterogeneity =0.0006）.In the stratified analysis by ethnicity,there was a significantly increased risk of prostate cancer among individuals of African descent under the recessive model（OR=1.56,95%CI=1.01- 2.39,P=0.04,P heterogeneity =0.65）.Conclusion：This meta-analysis suggested that CYP17 polymorphism might be associated with prostate cancer risk among individuals of African descent.
