In summary, this meta-analysis suggests that CYP3A4 A392G polymorphism is associated with increased prostate cancer risk among Caucasians and CYP3A5Met235Thr polymorphism is not associated with the risk of cancer.
Prostate cancer patients with CYP3A5*3/*3 and KLK -252A > G GG/AG genotypes had decreased OR of 0.70 with 95% CI 0.50-0.98 for high prostate-specific antigen levels at diagnosis.
Certain combined CYP3A4/CYP3A5 haplotypes show differential susceptibility to prostate cancer and there is a nonsignificant increase in the risk of small-cell lung cancer for a CYP3A5*1/*1 genotype.
These findings suggest that the CYP3A4 and CYP3A5 variants, or other alleles on the haplotypes they help distinguish, are associated with prostate cancer risk and aggressiveness.