Hydrolyzable tannins from Poincianella (Caesalpinia) microphylla fruits: Metabolite profiling and anti-Trichomonas vaginalis activity

Food Research International
L N SilvaA J Macedo

Abstract

Poincianella (Caesalpinia) microphylla fractions were analyzed by LC-DAD-MS and by statistical tools to determine the possible bioactive compounds against T. vaginalis. Tannins enriched-fractions toxicity (M5 and M10) were analyzed in in vitro against human red cells and in in vivo model of Galleria mellonella. Twenty-six compounds were detected from the P. microphylla fractions. The main compounds identified were hydrolyzable tannins (gallotanins and ellagitannis), such as O-digalloyl hexoside, O-digalloyl HHDP -hexoside, tri-O-galloyl HHDP-hexoside, O-galloyl HHDP-DHHDP-hexoside and their isomers. In addition, procyanidin dimer, epicatechin, ellagic acid and O-(digalloyl) quinic acid were also identified. Based on univariate statistical analyses, stronger correlations with the anti-T. vaginalis properties were observed for the compounds 7 (O-galloyl HHDP-DHHDP-hexoside - Geraniin isomer), 3 (O-digalloyl HHDP -hexoside - mallotinic acid), 2 (O-digalloyl) quinic acid), 1 (O-digalloyl hexoside) and 9 (unknown). Tannins enriched-fractions (M5 and M10) presented anti-Trichomonas activity (IC50 70.41 µg/mL and 142.1 µg/mL, respectively) and no toxicity in the in vivo model of G. mellonella. This innovative approach allowed us to id...Continue Reading

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Citations

Feb 22, 2021·International Journal for Parasitology. Drugs and Drug Resistance·Nooshin HashemiMarlene Benchimol

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