Induction of Bax and Bak (proapoptotic), down-regulation of Bcl-X(L) and Bcl-2 (anti-apoptotic), induction of WAF1/p21 and KIP1/p27, a decrease in cyclins D1, D2, and E, and a decrease in cdk2, cdk4, and cdk6 expression have been shown to occur in prostate cancer PC3 cells, following Pg treatment (74). Here, CDKN1A is linked to prostate cancer.