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Anti-Trypanosoma cruzi activity of costic acid isolated from Nectandra barbellata (Lauraceae) is associated with alterations in plasma membrane electric and mitochondrial membrane potentials

Texto completo
Autor(es):
Londero, Vinicius S. [1] ; Costa-Silva, Thais A. [2] ; Tempone, Andre G. [3] ; Namiyama, Gislene M. [4] ; Thevenard, Fernanda [2] ; Antar, Guilherme M. [5] ; Baitello, Joao B. [6] ; Lago, Joao Henrique G. [2]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09972270 Sao Paulo - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210180 Sao Paulo - Brazil
[3] Adolfo Lutz Inst, Ctr Parasitol & Micol, BR-01246902 Sao Paulo - Brazil
[4] Adolfo Lutz Inst, Lab Microscopia Eletron, BR-01246000 Sao Paulo - Brazil
[5] Univ Sao Paulo, Inst Biociencias, Dept Bot, BR-05508090 Sao Paulo - Brazil
[6] Inst Florestal, Div Dason, BR-02377000 Sao Paulo - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: BIOORGANIC CHEMISTRY; v. 95, JAN 2020.
Citações Web of Science: 0
Resumo

As part of our continuous studies on prospecting metabolites from Brazilian plant species with pharmacologic activity against Trypanosoma cruzi, the n-hexane extract from twigs of Nectandra barbellata (Lauraceae) was subjected to a bioactivity-guided fractionation to afford the sesquiterpene costic acid. As results, costic acid induced a trypanocidal effect with IC50 of 37.8 and 7.9 mu M to trypomastigotes and intracellular amastigotes, respectively. When tested in L929 cells, no cytotoxicity was detected in the highest tested concentration (CC50 > 200 mu M), resulting in SI values >5 and >25 to trypomastigotes and amastigotes, respectively. Based on these promising results against T. cruzi, a mechanistic study of the parasite death was investigated. The flow cytometry analysis of costic acid-treated parasites showed depolarization of the plasma membrane electric potential. Spectrofluorimetrical analysis and transmission electron microscopy showed no evidence of plasma membrane permeability alteration of trypomastigotes, but strong ultrastructural damage, evidenced by large vacuoles. Although Ca2+ and reactive oxygen species (ROS) levels were unaltered after short time incubation with costic acid, it rapidly affected the mitochondria, leading to a depolarized potential of the membrane, reducing the ATP levels. In silico studies of costic acid showed good predictions for drug-likeness, with adherence to Lipinskis rules of five (RO5), good ADMET properties and no alerts for Pan-Assay Interference Compounds (PAINS). Therefore, costic acid demonstrated promising activity against T. cruzi parasites, with high selectivity to intracellular amastigotes. Considering the lethal action of costic acid in affecting a vital and unique organelle as the mitochondria, it could be considered a new hit compound for future drug design studies for Chagas disease. (AU)

Processo FAPESP: 18/10279-6 - Seleção e Otimização de Novos Candidatos a Fármacos para Leishmaniose e Doença de Chagas
Beneficiário:André Gustavo Tempone Cardoso
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/17044-1 - Biomoléculas de Nectandra barbellata Coe-Teixeira (Lauraceae): uso de método alternativo sustentável para extração, caracterização molecular e avaliação do potencial antiparasitário
Beneficiário:Vinicius Silva Londero
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 18/07885-1 - Biomoléculas oriundas de espécies vegetais de áreas remanescentes da Mata Atlântica e do Cerrado para tratamento de doenças tropicais negligenciadas - aspectos químicos e farmacológicos
Beneficiário:João Henrique Ghilardi Lago
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Regular