Psychotropic agent thioridazine elicits potent in vitro and in vivo anti-melanoma effects.

Psychotropic agents have been shown anti-tumor potential in recent years. In the present study, our in vitro pharmacological data indicated that thioridazine inhibited melanoma cells proliferation. The growth-arresting effect of thioridazine was accompanied by autophagy induction, as shown by immunoblotting of increased LC3II. Besides, certain apoptotic events had also occurred after thioridazine exposure. The in vivo anti-melanoma effect of thioridazine was confirmed by showing that intraperitoneally injection of thioriazine remarkably retarded tumor growth and reduced tumor vasculature. Our results imply that thioridazine might be an available therapeutic agent for melanoma patients with no better options.