Title:In vitro and In vivo Biological Activity of Two Aryloxy-naphthoquinones in Mice Infected with Trypanosoma cruzi Strains
Volume: 20
Issue: 10
Author(s): Karina Vázquez, Adriana Moreno-Rodríguez*, Luis R. Domínguez-Díaz, Jeanluc Bertrand, Cristian O. Salas, Gildardo Rivera, Yobana Pérez Cervera and Virgilio Bocanegra-García
Affiliation:
- Facultad de Ciencias Químicas, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca
68120, México
Keywords:
Trypanosoma cruzi, aryloxy-naphthoquinones, trypanosomicidal activity, in vivo assay, mouse model, naphthoquinone derivatives.
Abstract:
Background: Chagas disease, a condition caused by Trypanosoma cruzi, is an endemic
disease in Latin American countries that affects approximately eight million people worldwide. It is
a continuing public health problem. As nifurtimox and benznidazole are the two pharmacological
treatments currently used to treat it, the present research proposes new therapeutic alternatives.
Previous studies conducted on naphthoquinone derivatives have found interesting trypanocidal
effects on epimastigotes, with the molecules 2-phenoxy-1,4-naphthoquinone (IC50= 50 nM and SI <
250) and 2-(3-nitrophenoxy)-naphthalene-1,4-dione (IC50= 20 nM and SI=625) presenting the best
biological activity..
Methods: The present study evaluated the efficacy of in vitro, ex vivo and in vivo models of two
aryloxyquinones, 2-phenoxy-1,4-naphthoquinone (1) and 2-(3-nitrophenoxy)-naphthalene-1,4-
dione (2), against two Mexican T. cruzi strains in both their epimastigote and blood Trypomastigote
stage. Both compounds were evaluated against T. cruzi using a mouse model (CD1) infected with
Mexican isolates of T. cruzi, nifurtimox and benznidazole used as control drugs. Finally, the cytotoxicity
of the two compounds against the J774.2 mouse macrophage cell line was also determined.
Results: The in vitro and in vivo results obtained indicated that both quinones were more active
than the reference drugs. Compound 1 presents in vivo activity, showing up to 40% parasite reduction
after 8 h of administration, a finding which is 1.25 times more effective than the results obtained
using nifurtimox.
Conclusion: These are encouraging results for proposing new naphthoquinone derivatives with
potential anti-T. cruzi activity.