Matheus D. Baldissera, Camila B. Oliveira, Carine E. P. Zimmermann, Aline A. Boligon, Margareth Linde Athayde, Leandro P. Bolzan, Rodrigo de A. Vaucher, Janio M. Santurio, Michele R. Sagrillo, Aleksandro Schafer da Silva, Silvia G. Monteiro
Korean J Parasitol 2014;52(3):311-315. Published online June 26, 2014
The aim of this study was to verify the trypanocidal effectiveness of aqueous, methanolic, and ethanolic extracts of Achyrocline satureioides against Trypanosoma evansi in vitro. A. satureioides extracts, known as macela, were used on trypomastigotes at different concentrations (1, 5, 10, 50, 100, 500, and 1,000 ?g/ml) and exposure times (0, 1, 3, 6, and 9 hr). A dose-dependent effect was observed when the 3 extracts were tested. The concentrations of 1, 5, and 10 ?g/ml were not able to kill trypomastigotes until 3 hr after exposure, and the highest concentrations (500 and 1,000 ?g/ml) were able to kill all trypomastigotes after 1 hr. When the time of exposure was increased up to 9 hr, the concentrations at 50 and 100 ?g/ml were 100% effective to 3 extracts. The chemical analysis of the extracts revealed the presence of flavonoids, a trypanocidal compound already described. Based on the results, we can conclude that the A. satureioides extracts exhibit trypanocidal effects.
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