New potent 5-nitroindazole derivatives as inhibitors of Trypanosoma cruzi growth: Synthesis, biological evaluation, and mechanism of action studies
作者:Jorge Rodríguez、Vicente J. Arán、Lucía Boiani、Claudio Olea-Azar、María Laura Lavaggi、Mercedes González、Hugo Cerecetto、Juan Diego Maya、Catalina Carrasco-Pozo、Hernán Speisky Cosoy
DOI:10.1016/j.bmc.2009.10.030
日期:2009.12.15
New 5-nitroindazole derivatives were developed and their antichagasic properties studied. Eight compounds (14-18, 20, 26 and 28) displayed remarkable in vitro activities against Trypanosoma cruzi (T. cruzi). Its unspecific cytotoxicity against macrophages was evaluated being not toxic at a concentration at least twice that of T. cruzi IC50, for some derivatives. The electrochemical studies, parasite respiration studies and ESR experiment showed that 5-nitroindazole derivatives not be able to yield a redox cycling with molecular oxygen such as occurs with nifurtimox (Nfx). The study on the mechanism of action proves to be related to the production of reduced species of the nitro moiety similar to that observed with benznidazole. (C) 2009 Elsevier Ltd. All rights reserved.