Design and Synthesis of 2-Heterocyclyl-3-arylthio-1<i>H</i>-indoles as Potent Tubulin Polymerization and Cell Growth Inhibitors with Improved Metabolic Stability
作者:Giuseppe La Regina、Ruoli Bai、Willeke Rensen、Antonio Coluccia、Francesco Piscitelli、Valerio Gatti、Alessio Bolognesi、Antonio Lavecchia、Ilaria Granata、Amalia Porta、Bruno Maresca、Alessandra Soriani、Maria Luisa Iannitto、Marisa Mariani、Angela Santoni、Andrea Brancale、Cristiano Ferlini、Giulio Dondio、Mario Varasi、Ciro Mercurio、Ernest Hamel、Patrizia Lavia、Ettore Novellino、Romano Silvestri
DOI:10.1021/jm2012886
日期:2011.12.22
New arylthioindoles (ATIs) were obtained by replacing the 2-alkoxycarbonyl group with a bioisosteric 5-membered heterocycle nucleus. The new ATIs 5, 8, and 10 inhibited tubulin polymerization, reduced cell growth of a panel of human transformed cell lines, and showed higher metabolic stability than the reference ester 3. These compounds induced mitotic arrest and apoptosis at a similar level as combretastatin A-4 and vinblastine and triggered caspase-3 expression in a significant fraction of cells in both p53-proficient and p53-defective cell lines. Importantly, ATIs 5, 8, and 10 were more effective than vinorelbine, vinblastine, and paclitaxel as growth inhibitors of the P-glycoprotein-overexpressing cell line NCI/ADR-RES. Compound 5 was shown to have medium metabolic stability in both human and mouse liver microsomes, in contrast to the rapidly degraded reference ester 3, and a pharmacokinetic profile in the mouse characterized by a low systemic clearance and excellent oral bioavailability.