Resumo

YALUFF, Gloria et al. In vitro antiparasitic activity of ethanolic extracts of Erythrina crista-galii L., Erythrina falcata Benth and Erythrina dominguezii Hassl. Mem. Inst. Investig. Cienc. Salud [online]. 2015, vol.13, n.2, pp.60-66. ISSN 1812-9528.  https://doi.org/10.18004/Mem.iics/1812-9528/2015.013(02)60-066.

American trypanososmiasis and Leishmaniasis are relevant public health problems in Ibero America. The in vitro antiparasitic activity of barks and leaves extracts of Erythrina crista-galli L., E. dominguezii Hassl and E. falcate Benth was evaluated on Trypanosoma cruzi tripomastigotes forms and Leishmania amazonensis, L. infantum and L. braziliensis promatigotes. The IC50s of the bark extract of E. dominguezii Hassl with two T. cruzi strains, Ypsilon and Cl Brener, were 11.7 µg/ml and 14.9 µg/ml. Leaf extract showed IC50 higher than 250 µg/ml. Bark extract of E. falcate Benth had IC50s of 11.29 µg/ml and 7.37 µg/ml with Ypsilon and Cl Brener strains and its leaf extract showed IC50s of 37.2 µg/ml and 25.68 µg/ml. Leaf extract of E. crista-galli L. showed IC50 higher than 250 µg/ml while bark extract had IC50s of 11.2µg/ml and 7.1 µg/ml with Ypsilon and Cl Brener strains. Bark extract of E. dominguezii Hassl showed IC50s of 3.22 µg/ml 6.94 µg/ml and 1.9 µg/ml for L. amazonensis, L. infantum and L. braziliensis and in leaf extract IC50 was higher than 100 µg/ml. Bark extract of E. crista-galli L. had IC50s of 2.1 µg/ml, 2.09 µg/ml and 1.6 µg/ml for the three species. Its leaf extract had IC50 higher than 100 µg/ml. Bark extracts of E. falcate Benth had IC50s of 2.17 µg/ml, 2.09 µg/ml and 1.52 µg/ml with the three Leishmania species and the leaf extract showed IC50s of 14.9 µg/ml, 10.4 µg/ml and 11.6µg/ml. Bark extracts could be an alternative for the treatment of these parasitic diseases previous confirmation by in vivo and toxicity studies.

Palavras-chave : Trypanosoma cruzi; Leishmania; Extracts; In vitro Erythrina.