Cell lysates were prepared from prostate cancer cells as previously described (26 (link)) and Western blot was performed using Mini-PROTEAN system (Bio-Rad). Primary antibodies against SREBP-1 (sc-8984), FASN (sc-48357), HMGCR (sc-33827), PSA (sc-7638) and β-actin (sc-47778) (Santa Cruz Biotechnology), SREBP-2 (ab72856, ab112046, Abcam), AR (PG-21, Millipore) and GAPDH (2118S, Cell Signaling Technology) and horseradish peroxidase-conjugated secondary antibodies (GE Healthcare Bio Science Corp) were used and membranes were visualized using a chemiluminescence reagent (Amersham Biosciences).