Molecules (Aug 2021)

Synthesis and Antimycobacterial Activity of 3-Phenyl-1<i>H</i>-indoles

  • Renata Jardim Etchart,
  • Raoní S. Rambo,
  • Bruno Lopes Abbadi,
  • Nathalia Sperotto,
  • Christiano Ev Neves,
  • Fernanda Fries Silva,
  • Maiele Dornelles,
  • Lovaine Duarte,
  • Fernanda Souza Macchi,
  • Marcia Alberton Perelló,
  • Rogério Vescia Lourega,
  • Cristiano Valim Bizarro,
  • Luiz Augusto Basso,
  • Pablo Machado

DOI
https://doi.org/10.3390/molecules26175148
Journal volume & issue
Vol. 26, no. 17
p. 5148

Abstract

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Tuberculosis has been described as a global health crisis since the 1990s, with an estimated 1.4 million deaths in the last year. Herein, a series of 20 1H-indoles were synthesized and evaluated as in vitro inhibitors of Mycobacterium tuberculosis (Mtb) growth. Furthermore, the top hit compounds were active against multidrug-resistant strains, without cross-resistance with first-line drugs. Exposing HepG2 and Vero cells to the molecules for 72 h showed that one of the evaluated structures was devoid of apparent toxicity. In addition, this 3-phenyl-1H-indole showed no genotoxicity signals. Finally, time-kill and pharmacodynamic model analyses demonstrated that this compound has bactericidal activity at concentrations close to the Minimum Inhibitory Concentration, coupled with a strong time-dependent behavior. To the best of our knowledge, this study describes the activity of 3-phenyl-1H-indole against Mtb for the first time.

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