Identification of the Metabolic Profile of the α-Tubulin-Binding Natural Product (−)–Pironetin
摘要:
Pironetin, the only crystallographically confirmed natural product to target a-tubulin, displays potent cytotoxic activity against sensitive and resistant A2780 ovarian cancer cell lines but is only marginally active in vivo. We now report that pironetin has a short half-life (<7 min) in human liver microsomes, suggesting that its limited in vivo efficacy is due to rapid metabolism. Further, we describe the discovery of epoxypironetin as pironetin's major metabolite in human liver microsomes.