Add time:08/05/2019         Source:sciencedirect.com

A novel series of 2-phenylquinoline-4-carboxamide derivatives was synthesized, characterized and evaluated for its antiproliferative activity against five cancer cell lines, Hela, SK-OV-3, HCT116, A549 and MDA-MB-468, and a normal human fetal lung fibroblastic cell line, MRC-5. Among them, compound 7b displayed potent cytotoxic activity in vitro against SK-OV-3 and HCT116 cell lines with IC50 values of 0.5 and 0.2 μM, respectively. In general, the antiproliferative activity was correlated with the binding property of the colchicine binding site and inhibitory effect on tubulin polymerization. In addition, immunofluorescence and flow cytometry analysis revealed that selected compounds caused disruption of the mitotic spindle assembly and G2/M phase arrest of the cell cycle, which correlated with proliferation inhibitory activity. Molecular docking analysis demonstrated the interaction of 7b at the colchicine binding site of tubulin. These results indicate these compounds are promising inhibitors of tubulin polymerization for the potent treatment of cancer.

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