New arylthioindoles and related bioisosteres at the sulfur bridging group. 4. Synthesis, tubulin polymerization, cell growth inhibition, and molecular modeling studies

Giuseppe La Regina, Taradas Sarkar, Ruoli Bai, Michael C. Edler, Roberto Saletti, Antonio Coluccia, Francesco Piscitelli, Lara Minelli, Valerio Gatti, Carmela Mazzoccoli, Vanessa Palermo, Cristina Mazzoni, Claudio Falcone, Anna Ivana Scovassi, Vincenzo Giansanti, Pietro Campiglia, Amalia Porta, Bruno Maresca, Ernest Hamel, Andrea BrancaleEttore Novellino, Romano Silvestri

Research output: Contribution to journalArticlepeer-review

Abstract

New arylthioindoles along with the corresponding ketone and methylene compounds were potent tubulin assembly inhibitors. As growth inhibitors of MCF-7 cells, sulfur derivatives were superior or sometimes equivalent to the ketones, while methylene derivatives were substantially less effective. Esters 24, 27-29, 36, 39, and 41 showed ∼50% of inhibition on human HeLa and HCT116/chr3 cells at 0.5 μM, and these compounds inhibited the growth of HEK, M14, and U937 cells with IC50's in the 78-220 nM range. While murine macrophage J744.1 cell growth was significantly less affected (20% at higher concentrations), four other nontransformed cell lines remained sensitive to these esters. The effect of drug treatment on cell morphology was examined by time-lapse microscopy. In a protocol set up to evaluate toxicity on the Saccharomyces cerevisiae BY4741 wild type strain, compounds 24 and 54 strongly reduced cell growth, and 29, 36, and 39 also showed significant inhibition.

Original languageEnglish
Pages (from-to)7512-7527
Number of pages16
JournalJournal of Medicinal Chemistry
Volume52
Issue number23
DOIs
Publication statusPublished - Dec 10 2009

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery

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