Pharmacological inhibition of CB1 cannabinoid receptor protects against doxorubicin-induced cardiotoxicity.

Objectives: We aimed to explore the effects of pharmacologic inhibition of cannabinoid-1 (CB1) receptor in in vivo and in vitro models of doxorubicin (DOX)-induced cardiotoxicity.

Background: Doxorubicin is one of the most potent antitumor agents available; however, its clinical use is limited because of the risk of severe cardiotoxicity. Endocannabinoids mediate cardiodepressive effects through CB1 receptors in various pathophysiological conditions, and these effects can be reversed by CB1 antagonists.