migrastatin

Migrastatin is a bacterial metabolite that has been found inStreptomyceswith antimuscarinic and anticancer activities.1,2It binds to M1-5muscarinic acetylcholine receptors (Kis = >200, 200, 31, 43, and >200 μM, respectively) and inhibits calcium mobilization induced by carbamoylcholine in SK-N-SH cells (IC50= 28 μM), as well as in primary rat bladder smooth muscle cells.1Migrastatin inhibits the migration of EC17 esophageal cancer cells in a wound healing assay (IC50= 10 μg/ml) and 4T1 mouse mammary carcinoma cells in a chamber cell migration assay (IC50= 29 μM).2It enhances cytotoxicity induced by vinblastine in vincristine-resistant P388/VCR cells.3

SK1071 is a novel migrastatin analogs, which demonstrated improved performance over migrastatin, with nanomolar IC50 values in chamber cell migration assays with tumor cells and human umbilical vein endothelial cells (HUVECs), and in wound healing assays.