Down-regulation of androgen receptor by 3,3′-diindolylmethane contributes to inhibition of cell proliferation and induction of apoptosis in both hormone-sensitive LNCaP and insensitive C4-2B prostate cancer cells: Bhuiyan MM, Li Y, Banerjee S, Ahmed F, Wang Z, Ali S, Sarkar FH, Departments of Pathology and Internal Medicine, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI