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Open AccessArticle

Evaluation of the Anti-Trypanosomal Activity of Vietnamese Essential Oils, with Emphasis on Curcuma longa L. and Its Components

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GNOS Research Group, Louvain Drug Research Institute, Université catholique de Louvain, UCLouvain, 1200 Bruxelles, Belgium
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Department of Pharmacognosy, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
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Department of Botany, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
4
TFAR Research Group, Louvain Drug Research Institute, Université catholique de Louvain, UCLouvain, 1200 Bruxelles, Belgium
*
Authors to whom correspondence should be addressed.
Academic Editor: Francesca Mancianti
Molecules 2019, 24(6), 1158; https://doi.org/10.3390/molecules24061158
Received: 12 February 2019 / Revised: 8 March 2019 / Accepted: 11 March 2019 / Published: 23 March 2019
(This article belongs to the Special Issue Biological Activities of Essential Oils)
Human African trypanosomiasis (HAT), known as sleeping sickness and caused by Trypanosoma brucei, is threatening low-income populations in sub-Saharan African countries with 61 million people at risk of infection. In order to discover new natural products against HAT, thirty-seven Vietnamese essential oils (EOs) were screened for their activity in vitro on Trypanosoma brucei brucei (Tbb) and cytotoxicity on mammalian cells (WI38, J774). Based on the selectivity indices (SIs), the more active and selective EOs were analyzed by gas chromatography. The anti-trypanosomal activity and cytotoxicity of some major compounds (isolated or commercial) were also determined. Our results showed for the first time the selective anti-trypanosomal effect of four EOs, extracted from three Zingiberaceae species (Curcuma longa, Curcuma zedoaria, and Zingiber officinale) and one Lauraceae species (Litsea cubeba) with IC50 values of 3.17 ± 0.72, 2.51 ± 1.08, 3.10 ± 0.08, and 2.67 ± 1.12 nL/mL respectively and SI > 10. Identified compounds accounted for more than 85% for each of them. Among the five major components of Curcuma longa EO, curlone is the most promising anti-trypanosomal candidate with an IC50 of 1.38 ± 0.45 µg/mL and SIs of 31.7 and 18.2 compared to WI38 and J774 respectively. View Full-Text
Keywords: Trypanosoma; Curcuma zedoaria; Curcuma longa; Litsea cubeba; Zingiber officinale; α-zingiberene, β-sesquiphellandrene; ar-curcumene; ar-turmerone, curlone Trypanosoma; Curcuma zedoaria; Curcuma longa; Litsea cubeba; Zingiber officinale; α-zingiberene, β-sesquiphellandrene; ar-curcumene; ar-turmerone, curlone
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Le, T.B.; Beaufay, C.; Nghiem, D.T.; Pham, T.A.; Mingeot-Leclercq, M.-P.; Quetin-Leclercq, J. Evaluation of the Anti-Trypanosomal Activity of Vietnamese Essential Oils, with Emphasis on Curcuma longa L. and Its Components. Molecules 2019, 24, 1158.

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