Design, synthesis and characterization of N-oxide-containing heterocycles with in vivo sterilizing antitubercular activity
journal contributionposted on 2021-08-17, 11:45 authored by Guilherme Felipe dos Santos Fernandes, Paula Carolina de Souza, Elsa Moreno-Viguri, Mery Santivañez-Veliz, Rocio Paucar, Silvia Pérez-Silanes, Konstantin Chegaev, Stefano Guglielmo, Loretta Lazzarato, Roberta Fruttero, Chung Man Chin, Patricia Bento da Silva, Marlus Chorilli, Mariana Cristina Solcia, Camila Maríngolo Ribeiro, Caio Sander Paiva Silva, Leonardo Biancolino Marino, Priscila Longhin Bosquesi, Debbie M Hunt, Luiz Pedro Sorio de Carvalho, Carlos Alberto de Souza Costa, Sang Hyun Cho, Yuehong Wang, Scott Gary Franzblau, Fernando Rogério Pavan, Jean Leandro dos Santos
Tuberculosis, caused by Mycobacterium tuberculosis (Mtb), is the infectious disease responsible for the highest number of deaths worldwide. Herein, 22 new N-oxide-containing compounds were synthesized followed by in vitro and in vivo evaluation of their antitubercular potential against Mtb. Compound 8 was found to be the most promising compound, with MIC90 values of 1.10 and 6.62 μM against active and nonreplicating Mtb, respectively. Additionally, we carried out in vivo experiments to confirm the safety and efficacy of compound 8; the compound was found to be orally bioavailable and highly effective, leading to a reduction of Mtb to undetectable levels in a mouse model of infection. Microarray-based initial studies on the mechanism of action suggest that compound 8 blocks translation. Altogether, these results indicate that benzofuroxan derivative 8 is a promising lead compound for the development of a novel chemical class of antitubercular drugs.
AnimalsAntitubercular AgentsBiological AvailabilityCaco-2 CellsHeterocyclic CompoundsHumansMiceMice, Inbred BALB CMicrobial Sensitivity TestsMycobacterium tuberculosisOxidesSpectrum AnalysisCarvalho FC001060Medicinal & Biomolecular Chemistry0304 Medicinal and Biomolecular Chemistry0305 Organic Chemistry1115 Pharmacology and Pharmaceutical Sciences