Evaluation of 13 selected medicinal plants from Burkina Faso for their antiplasmodial properties.
ABSTRACT The aim of this study was to evaluate the antiplasmodial properties of 13 plants used against malaria in traditional medicine in Burkina Faso.
In vitro antiplasmodial activity of dichloromethane, methanol and aqueous crude extracts obtained from vegetal samples collected in Burkina Faso was first evaluated on the Plasmodium falciparum 3D7 chloroquine-sensitive strain using a colorimetric method.
Thirteen extracts obtained from 8 different species were found to exhibit antiplasmodial activity (IC(50)<50 microg/ml). Five species demonstrated a moderate activity (15 microg/ml<IC(50)<50 microg/ml): Boswellia dalzielii (leaves), Waltheria indica (roots and aerial parts), Bergia suffruticosa (whole plant), Vitellaria paradoxa (bark) and Jatropha gossypiifolia (leaves). The best results were obtained with extracts from the Dicoma tomentosa whole plant, from Psorospermum senegalense leaves and from Gardenia sokotensis leaves. These extracts found to display promising antiplasmodial activity, with IC(50) values ranging from 7.0 to 14.0 microg/ml. The most active plant extracts were then tested for in vitro activity on the Plasmodium falciparum W2 chloroquine-resistant strain and also for in vitro cytotoxicity on normal human fibroblasts (WI-38) in order to determine the selectivity index.
Dicoma tomentosa (Asteraceae) and Psorospermum senegalense (Clusiaceae) appeared to be the best candidates for further investigation of their antiplasmodial properties, reported for the first time by this study.
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ABSTRACT: This review covers the compounds with antiplasmodial activity isolated from plants published from 2005 to the end of 2008, organized according to their phytochemical classes. Details are given for substances with IC50 values < or = 11 microm. Malaria is a major parasitic disease in many tropical and subtropical regions and is responsible for more than 1 million deaths each year in Africa. The rapid spread of resistance encourages the search for new active compounds. Nature and particularly plants used in traditional medicine are a potential source of new antimalarial drugs as they contain molecules with a great variety of structures and pharmacological activities. A large number of antimalarial compounds with a wide variety of structures have been isolated from plants and can play a role in the development of new antimalarial drugs. Ethnopharmacological approaches appear to be a promising way to find plant metabolites that could be used as templates for designing new derivatives with improved properties.The Journal of pharmacy and pharmacology. 11/2009; 61(11):1401-33.
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ABSTRACT: New treatments are urgently needed to curb and eradicate malaria in developing countries. As most people living in malarial endemic areas use traditional medicine to fight this disease, why have new treatments not emerged recently from ethnopharmacology-oriented research? The rationale and limitations of the ethnopharmacological approach are discussed in this paper, focusing on ethnopharmacology methodologies and techniques used for assessing botanical samples for their antimalarial properties. Discrepancies often observed between strong ethnopharmacological reputation and laboratory results are discussed, as well as new research perspectives.International Journal for Parasitology 02/2008; 38(1):33-41. · 3.64 Impact Factor
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ABSTRACT: Racemosol and demethylracemosol, together with their possible biogenetic precursors, preracemosol A and preracemosol B, were isolated from the roots of Bauhinia malabarica Roxb. While only racemosol and demethylracemosol exhibited cytotoxicity against KB and BC cell lines, all four compounds exhibited moderate antimalarial activity.Phytochemistry 11/2000; 55(4):349-52. · 3.05 Impact Factor