Antitrypanosomal Activity of a Novel Taccalonolide from the Tubers of Tacca leontopetaloides

Abstract

Introduction: Several taccalonolides with various bioactivities have been isolated from Tacca species but no studies to isolate taccalonolides with anti-trypanosomal activity from Tacca leontopetaloides have been reported.

Objectives: To analyse extracts of the roots of Tacca leontopetaloides, purify the extracts by column chromatography and identify isolated compounds by spectroscopic methods. The compounds and fractions will be tested for antitrypanosomal activity in vitro against Trypanosoma brucei brucei.

Material and methods: Dried roots or tubers of Tacca leontopetaloides, chromatographic separation and spectroscopic identification.

Results: A novel taccalonolide A propanoate and some known taccalonolides were isolated and their structures were determined by NMR and mass spectrometry

Conclusion: Several taccalonolides were isolated from Tacca leontopetaloides and were found to have in vitro antitrypanosomal activity against Trypanosoma brucei brucei and EC50 values for the isolated compounds were from 0.79 µg/mL. Copyright © 2016 John Wiley & Sons, Ltd.

Keywords: Tacca leontopetaloides; Taccalonolides; antitrypanosomal activity; taccalonolide A 12-propanoate.