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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
pharmacology, toxicology and pharmaceutics
Potent antiplasmodial extracts from Cameroonian Annonaceae
Journal of Ethnopharmacology, Volume 134, No. 3, Year 2011
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Description
Aim of the study: In a search for new antimalarial leads, we have carried out a preliminary ethnopharmacological study with the aim of evaluating the in vitro antiplasmodial activity of extracts from thirteen Annonaceae species growing in Cameroon, and of assessing the acute toxicity of promising fractions in Swiss albino mice. Materials and methods: Plants were selected on the basis of an ethnobotanical survey carried out in four sites in centre and south regions of Cameroon (Yaoundé neighbourhoods, Kon-Yambetta, Ngobayang and Mbalmayo) on Annonaceae plants locally used to treat malaria and related symptoms. The choice of the sites was mainly based on environmental factors enabling mosquito breeding, cosmopolitan areas regrouping people from different cultural origins, areas with limited access to health centers, and areas with people relying exclusively on traditional medical practices. Collected materials were extracted by maceration in 95% ethanol. The crude extract was partitioned using organic solvents and the fractions afforded were evaluated for antiplasmodial activity in culture against the W2 strain of Plasmodium falciparum. Promising fractions (methanol fractions) were assessed for their acute toxicity in Swiss albino mice. Results: From the results achieved, 37 (31.3%) out of 118 extracts tested exhibited antiplasmodial activity, with IC50 values ranging from 1.07 μg/ml to 9.03 μg/ml. Of the active extracts, 29 (78.4%) were methanol fractions, 21 (72.4%) of which inhibited the parasites with IC50 < 5 μg/ml. The promising fractions proved to be safe through oral administration in mice. Conclusions: The activities and toxicity profiles of methanol fractions indicate that they deserve to be further investigated in detail for antimalarial lead discovery. © 2011 Elsevier Ireland Ltd.
Authors & Co-Authors
Boyom, Fabrice Fekam
Cameroon, Yaounde
Université de Yaoundé I
Tsouh Fokou, Patrick Valere
Cameroon, Yaounde
Université de Yaoundé I
Yamthé, Lauve Rachel Tchokouaha
Cameroon, Yaounde
Université de Yaoundé I
Mfopa, Alvine Ngoutane
Cameroon, Yaounde
Université de Yaoundé I
Kemgne, Eugénie Aimée Madiesse
Cameroon, Yaounde
Université de Yaoundé I
Mbacham, Wilfred Fon
Cameroon, Yaounde
Université de Yaoundé I
Tsamo, Etienne
Cameroon, Yaounde
Université de Yaoundé I
Zollo, Paul Henri Amvam
Cameroon, Yaounde
Université de Yaoundé I
Gut, Jiří
United States, San Francisco
Ucsf School of Medicine
Rosenthal, Philip Jon
United States, San Francisco
Ucsf School of Medicine
Statistics
Citations: 58
Authors: 10
Affiliations: 2
Identifiers
Doi:
10.1016/j.jep.2011.01.020
ISSN:
03788741
Research Areas
Health System And Policy
Infectious Diseases
Study Design
Cross Sectional Study
Study Approach
Quantitative
Study Locations
Cameroon