Synthesis and biological evaluation of 2-methyl-1H-benzimidazole-5-carbohydrazides derivatives as modifiers of redox homeostasis of Trypanosoma cruzi
作者:Silvia Melchor-Doncel de la Torre、Citlali Vázquez、Zabdi González-Chávez、Lilián Yépez-Mulia、Rocío Nieto-Meneses、Ricardo Jasso-Chávez、Emma Saavedra、Francisco Hernández-Luis
DOI:10.1016/j.bmcl.2017.06.013
日期:2017.8
Twelve novel benzimidazole derivatives were synthesized and their in vitro activities against epimastigotes of Trypanosoma cruzi were evaluated. Two derivatives (6 and 7), which have 4-hydroxy-3-methoxyphenyl moiety in their structures, proved to be the most active in inhibiting the parasite growth. Compound 6 showed a trypanocidal activity higher than benznidazole (IC50 = 5 mu M and 7.5 mu M, respectively) and less than nifurtimox (IC50 = 3.6 mu M). In addition, the ability of 6 and 7 to modify the redox homeostasis in T cruzi epimastigote was studied; cysteine and glutathione increased in parasites exposed to both compounds, whereas trypanothione only increased with 7 treatment. These results suggest that the decrease in viability of T. cruzi may be attributed to the change in cellular redox balance caused by compound 6 or 7. Furthermore, compounds 6 and 7 showed CC50 values of 160.64 and 160.66 mu M when tested in mouse macrophage cell line J774 and selectivity indexes (macrophage/parasite) of 32 and 20.1, respectively. (C) 2017 Elsevier Ltd. All rights reserved.