Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense

Vahekeni, Nina; Brillatz, Théo; Rahmaty, Marjan; Cal, Monica; Keller-Maerki, Sonja; Rocchetti, Romina; Kaiser, Marcel; Sax, Sibylle; Mattli, Kevin; Wolfram, Evelyn; Marcourt, Laurence; Queiroz, Emerson Ferreira; Wolfender, Jean-Luc; Mäser, Pascal

doi:10.3390/molecules29071611

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-30503

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense
Authors:	Vahekeni, Nina Brillatz, Théo Rahmaty, Marjan Cal, Monica Keller-Maerki, Sonja Rocchetti, Romina Kaiser, Marcel Sax, Sibylle Mattli, Kevin Wolfram, Evelyn Marcourt, Laurence Queiroz, Emerson Ferreira Wolfender, Jean-Luc Mäser, Pascal
et. al:	No
DOI:	10.3390/molecules29071611 10.21256/zhaw-30503
Published in:	Molecules
Volume(Issue):	29
Issue:	7
Page(s):	1611
Issue Date:	3-Apr-2024
Publisher / Ed. Institution:	MDPI
ISSN:	1420-3049
Language:	English
Subjects:	African medicinal plant; Angola; Brasenia schreberi; Nymphaea lotus; Ethnopharmacology; Trypanosomiasis; Humans; Animal; Seed; Plant extract; Trypanosomiasis, African; Antiprotozoal agent
Subject (DDC):	572: Biochemistry
Abstract:	Folk medicine is widely used in Angola, even for human African trypanosomiasis (sleeping sickness) in spite of the fact that the reference treatment is available for free. Aiming to validate herbal remedies in use, we selected nine medicinal plants and assessed their antitrypanosomal activity. A total of 122 extracts were prepared using different plant parts and solvents. A total of 15 extracts from seven different plants exhibited in vitro activity (>70% at 20 µg/mL) against Trypanosoma brucei rhodesiense bloodstream forms. The dichloromethane extract of Nymphaea lotus (leaves and leaflets) and the ethanolic extract of Brasenia schreberi (leaves) had IC50 values ≤ 10 µg/mL. These two aquatic plants are of particular interest. They are being co-applied in the form of a decoction of leaves because they are considered by local healers as male and female of the same species, the ethnotaxon "longa dia simbi". Bioassay-guided fractionation led to the identification of eight active molecules: gallic acid (IC50 0.5 µg/mL), methyl gallate (IC50 1.1 µg/mL), 2,3,4,6-tetragalloyl-glucopyranoside, ethyl gallate (IC50 0.5 µg/mL), 1,2,3,4,6-pentagalloyl-β-glucopyranoside (IC50 20 µg/mL), gossypetin-7-O-β-glucopyranoside (IC50 5.5 µg/mL), and hypolaetin-7-O-glucoside (IC50 5.7 µg/mL) in B. schreberi, and 5-[(8Z,11Z,14Z)-heptadeca-8,11,14-trienyl] resorcinol (IC50 5.3 µg/mL) not described to date in N. lotus. Five of these active constituents were detected in the traditional preparation. This work provides the first evidence for the ethnomedicinal use of these plants in the management of sleeping sickness in Angola.
URI:	https://digitalcollection.zhaw.ch/handle/11475/30503
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	Life Sciences and Facility Management
Organisational Unit:	Institute of Chemistry and Biotechnology (ICBT)
Appears in collections:	Publikationen Life Sciences und Facility Management

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Vahekeni, N., Brillatz, T., Rahmaty, M., Cal, M., Keller-Maerki, S., Rocchetti, R., Kaiser, M., Sax, S., Mattli, K., Wolfram, E., Marcourt, L., Queiroz, E. F., Wolfender, J.-L., & Mäser, P. (2024). Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense. Molecules, 29(7), 1611. https://doi.org/10.3390/molecules29071611

Vahekeni, N. et al. (2024) ‘Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense’, Molecules, 29(7), p. 1611. Available at: https://doi.org/10.3390/molecules29071611.

N. Vahekeni et al., “Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense,” Molecules, vol. 29, no. 7, p. 1611, Apr. 2024, doi: 10.3390/molecules29071611.

VAHEKENI, Nina, Théo BRILLATZ, Marjan RAHMATY, Monica CAL, Sonja KELLER-MAERKI, Romina ROCCHETTI, Marcel KAISER, Sibylle SAX, Kevin MATTLI, Evelyn WOLFRAM, Laurence MARCOURT, Emerson Ferreira QUEIROZ, Jean-Luc WOLFENDER und Pascal MÄSER, 2024. Antiprotozoal activity of plants used in the management of sleeping sickness in Angola and bioactivity-guided fractionation of Brasenia schreberi J.F.Gmel and Nymphaea lotus L. active against T. b. rhodesiense. Molecules. 3 April 2024. Bd. 29, Nr. 7, S. 1611. DOI 10.3390/molecules29071611

Vahekeni, Nina, Théo Brillatz, Marjan Rahmaty, Monica Cal, Sonja Keller-Maerki, Romina Rocchetti, Marcel Kaiser, et al. 2024. “Antiprotozoal Activity of Plants Used in the Management of Sleeping Sickness in Angola and Bioactivity-Guided Fractionation of Brasenia Schreberi J.F.Gmel and Nymphaea Lotus L. Active against T. B. Rhodesiense.” Molecules 29 (7): 1611. https://doi.org/10.3390/molecules29071611.

Vahekeni, Nina, et al. “Antiprotozoal Activity of Plants Used in the Management of Sleeping Sickness in Angola and Bioactivity-Guided Fractionation of Brasenia Schreberi J.F.Gmel and Nymphaea Lotus L. Active against T. B. Rhodesiense.” Molecules, vol. 29, no. 7, Apr. 2024, p. 1611, https://doi.org/10.3390/molecules29071611.