摘要:
Malignant melanoma (MM) presents as the highest morbidity and mortality type in skin cancer. Herein, inspired by the previously reported anti-melanoma effect of propranolol, a widely applied beta adrenergic receptor antagonist as cardiovascular drug, we set out to exploit its potential as anti-melanoma therapy based on the drug repurposing strategy. Structural optimization of propranolol yielded 5m, which exhibits dramatically improved potency on human melanoma cell growth (1.98-3.70 mu M), compared to propranolol (59.5-75.8 mu M). Further investigation demonstrated that 5m could inhibit colony formation of melanoma cell line (completely abolished at 2 mu M for 5m, partially inhibited at 50 mu M for propranolol), induce cell apoptosis and cell cycle arrest in the G(2)/M phase (both observed at 1 mu M). Preliminary mechanism study indicated that 5m could disrupt the cellular microtubule network, which suggested tubulin as a potential target. Docking study provided a structural insight into the interaction between 5m and tubulin. In summary, our study presents a drug repurposing case that redirects a cardiovascular agent to an anti-melanoma agent.