(A) PC3, DU145, and LNCaP cells were pre-treated with AICAR (1 mM) or compound C (5 μM) for 1 h. The cells were then either left untreated or were treated with Orlistat (100 μM) for 24 h. Cell viability was assessed by MTT assay. (B) PC3, DU145, and LNCaP cells were pre-treated with AICAR (1 mM) or compound C (5 μM) for 1 h. The cells were then either left untreated or were treated with Orlistat (100 μM) for 48 h. Cell proliferation was assessed by CyQUANT® assay. (C) PC3, DU145, and LNCaP cells were pre-treated with AICAR (1 mM) or compound C (5 μM) for 1 h. The cells were then either left untreated or were treated with Orlistat (100 μM) for 24 h. Apoptosis was analyzed by Hoechst 33342 assay. Graphs represent relative fluorescence intensity. Values are mean ± S.E.M (n = 3). *, p < 0.05 versus control. #, p < 0.05 versus Orlistat treatment.