Trypanocidal and cytotoxic activity of extracts of Colombian plants

Lorena Valencia, Diana Lorena Muñoz, Sara María Robledo, Fernando Echeverri, Gabriel Jaime Arango, Iván Darío Vélez, Omar Triana, .

Keywords: Trypanosoma cruzi, Chagas disease, plants extracts

Abstract

Introduction. The treatment of Chagas disease is based on only two drugs with limited efficacy and significant side effects. The rich biodiversity of the Colombian flora makes bio-prospecting a potential alternative in the search for new antiparasitic drugs.
Objective. Potential trypanocidal activity and cytotoxicity was assessed in extracts from 23 Colombian plants.
Materials and methods. Extracts of leaves, stems, or of the whole plants were obtained in solvents of a range of polarities. The activity against Trypanosoma cruzi epimastigotes and the cytotoxicity were evaluated by the MTT enzymatic micro-method. Extracts active against epimastigotes and with low cytotoxicity were also tested on trypomastigotes and intracellular amastigotes.
Results. Among the extracts, biological activity was confirmed in 4 species. The extracts were active on epimastigotes and trypomastigotes; one was active also against amastigotes. The latter extract was isolated from the plant Hieronyma antioquensis and presented IC50 of 3.1 mg/ml for epimastigotes, 11.5 mg/ml for trypomastigotes and 2.9 mg/ml for amastigotes. The selectivity indexes were 25, 7, and 27 respectively.
Conclusions. The extract from H. antioquensis proved a promising candidate for Chagas disease treatment. Futhermore, the MTT enzymatic micromethod was a useful tool for screening biological activity on epimastigotes and other stages of the parasite for further extract trials.

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  • Lorena Valencia Biología y Control de Enfermedades Infecciosas, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Diana Lorena Muñoz Programa de Estudio y Control de Enfermedades Tropicales, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Sara María Robledo Programa de Estudio y Control de Enfermedades Tropicales, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Fernando Echeverri Química Orgánica de Productos Naturales, Universidad de Antioquia, Medellín, Colombia
  • Gabriel Jaime Arango Grupo de Investigación de Sustancias Bioactivas, Universidad de Antioquia, Medellín, Colombia
  • Iván Darío Vélez Programa de Estudio y Control de Enfermedades Tropicales, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Omar Triana Biología y Control de Enfermedades Infecciosas, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia

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How to Cite
1.
Valencia L, Muñoz DL, Robledo SM, Echeverri F, Arango GJ, Vélez ID, et al. Trypanocidal and cytotoxic activity of extracts of Colombian plants. biomedica [Internet]. 2011 Jun. 30 [cited 2024 May 11];31(4):552-9. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/426

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