In vitro and in vivo antitrypanosomatid activity of 5-nitroindazoles.
Previously, we have identified a series of 5-nitroindazoles with good antiprotozoal activities, against Trypanosoma cruzi epimastigotes and Trichomonas vaginalis. Most of them have shown very low unspecific toxicity on macrophage cell lines. In the present work, we assayed these compounds on T. cruzi bloodstream trypomastigotes and Leishmania promastigotes (Leishmania amazonensis, Leishmania braziliensis and Leishmania infantum). Derivatives 1, 2, 7 and 8 displayed remarkable trypanocidal activity (>80% lysis) equivalent to gentian violet. Derivatives 2 and 10, as Pentamidine, caused the complete lysis of promastigotes of Leishmania. An oxidative stress-mediated mechanism of action was confirmed for derivatives 1, 10 and 12 on T. cruzi epimastigotes. Supported by the in vitro activities, derivatives 1 and 2 were submitted to in vivo assays using an acute model of Chagas' disease and a short-term treatment. None of the animals treated with derivatives 1 and 2 died, unlike the untreated control and Benznidazole groups.
Boiani
Lucia
L
Departamento de Química Orgánica, Facultad de Ciencias-Facultad de Química, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay.
Gerpe
Alejandra
A
Arán
Vicente J
VJ
Torres de Ortiz
Susana
S
Serna
Elva
E
Vera de Bilbao
Ninfa
N
Sanabria
Luis
L
Yaluff
Gloria
G
Nakayama
Héctor
H
Rojas de Arias
Antonieta
A
Maya
Juan Diego
JD
Morello
J Antonio
JA
Cerecetto
Hugo
H
González
Mercedes
M
D000818:Animals; D004353:Drug Evaluation, Preclinical; D066298:In Vitro Techniques; D007191:Indazoles / Q000737:chemistry / Q000494:pharmacology*; D007891:Leishmania / Q000145:classification / Q000187:drug effects; D051379:Mice; D014344:Trypanocidal Agents / Q000737:chemistry / Q000494:pharmacology*; D014349:Trypanosoma cruzi / Q000187:drug effects
D007191:Indazoles; D014344:Trypanocidal Agents; C530840:5-nitroindazole