PST-3 (Microtubule inhibitor PST-3) is a novel microtubule inhibitor exhibited broad-spectrum cellular cytotoxicity and in vivo potency with high safety.PST-3 inhibits different cancer cell with high safety (BT549 IC50=15 uM, MDA-MB-468 IC50=16 uM), inhibits human breast cancer cell clonogenic growth with IC50 values rang from 3 uM to 25 uM (MDA-MB-231 cell IC50=11.43 uM).PST-3 binds to the colchicine binding site on microtubule, induces morphological changes, disrupts the structure of microtubule in cells and inhibits tubulin polymerization, arrests BT549 and MDA-MB-468 cells in G2/M phase.PST-3 shows preferential growth inhibition in triple-negative breast cancer xenografts growth without neurotoxicity in vivo.
