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J Ethnopharmacol

Title:		In vitro antitrypanosomal and antiplasmodial activities of crude extracts and essential oils of Ocimum gratissimum Linn from Benin and influence of vegetative stage
Author(s):		Kpadonou Kpoviessi BG; Kpoviessi SD; Yayi Ladekan E; Gbaguidi F; Frederich M; Moudachirou M; Quetin-Leclercq J; Accrombessi GC; Bero J;
Address:		"Laboratory of Physic and Synthesis Organic Chemistry (LaCOPS), University of Abomey-Calavi, Faculty of Sciences and Technics (FAST), BP: 4521, Cotonou, Benin; National Laboratory of Pharmacognosy, Benin center of Scientific and Technical Research (CBRST), BP 06 Oganla, Porto-Novo, Benin. Laboratory of Physic and Synthesis Organic Chemistry (LaCOPS), University of Abomey-Calavi, Faculty of Sciences and Technics (FAST), BP: 4521, Cotonou, Benin; Pharmacognosy Research Group, Louvain Drug Research Institute, Universite catholique de Louvain, B1.72.03 Av. E. Mounier 72, B-1200 Bruxelles, Belgium. National Laboratory of Pharmacognosy, Benin center of Scientific and Technical Research (CBRST), BP 06 Oganla, Porto-Novo, Benin. Universite de Liege, Drug Research Center, Laboratoire de Pharmacognosie, Av. de l??Hopital 1, B36, B-4000 Liege, Belgium. Pharmacognosy Research Group, Louvain Drug Research Institute, Universite catholique de Louvain, B1.72.03 Av. E. Mounier 72, B-1200 Bruxelles, Belgium. Laboratory of Physic and Synthesis Organic Chemistry (LaCOPS), University of Abomey-Calavi, Faculty of Sciences and Technics (FAST), BP: 4521, Cotonou, Benin. Pharmacognosy Research Group, Louvain Drug Research Institute, Universite catholique de Louvain, B1.72.03 Av. E. Mounier 72, B-1200 Bruxelles, Belgium. Electronic address: joanne.bero@uclouvain.be"
Journal Title:		J Ethnopharmacol
Year:		2014
Volume:		20140721
Issue:		3
Page Number:		1417 - 1423
DOI:		10.1016/j.jep.2014.07.014
ISSN/ISBN:		1872-7573 (Electronic) 0378-8741 (Linking)
Abstract:		"ETHNOPHARMACOLOGICAL RELEVANCE: Different parts of Ocimum gratissimum Linn are largely used in folk medicine for the treatment of many diseases, some of which related to parasitical infections as fevers and headaches. In order to validate their use and to clarify the plant part which possesses the best antiparasitic properties, we decided to evaluate the in vitro antiplasmodial and antitrypanosomal activities of essential oils and crude extracts from leaves, stems and seeds of Ocimum gratissimum as well as their cytotoxicity. MATERIALS AND METHODS: The essential oils and ethanol crude extracts of leaves and stems of Ocimum gratissimum from Benin, were obtained in pre and full flowering stages. Seeds obtained only in full flowering stage, were also extracted. The oils were isolated by hydrodistillation and analyzed by GC/MS and GC/FID. Extracts and essential oils were tested in vitro against Trypanosoma brucei brucei and Plasmodium falciparum. Cytotoxicity was evaluated in vitro against Chinese Hamster Ovary (CHO) cells and the human non cancer fibroblast cell line (WI38) through MTT assay to evaluate the selectivity and toxicity was assessed against Artemia salina Leach. RESULTS: The essential oils and non-volatile crude extracts of Ocimum gratissimum were more active on Trypanosoma brucei brucei than on Plasmodium falciparum (3D7). This activity varies according to the vegetative stage (pre and full flowering) and the plant part (seeds, stems and leaves) extracted. The best growth inhibition of Trypanosoma brucei brucei was observed with ethanol crude extracts of leaves (IC50=1.66 +/- 0.48 mug/mL) and seeds (IC50=1.29 +/- 0.42 mug/mL) in full flowering stage with good selectivity (SI>10). The chemical composition of the essential oil from aerial parts (47 compounds), characterized by the presence as main constituents of p-cymene, thymol, gamma-terpinene, beta-myrcene and alpha-thujene, depends on the vegetative stage. The oil contained some minor compounds such as myrcene (IC50=2.24 +/- 0.27mug/mL), citronellal (IC50=2.76 +/- 1.55mug/mL), limonene (IC50=4.24 +/- 2.27mug/mL), with good antitrypanosomal activities. These oils and crude extracts were not toxic against Artemia salina Leach and had a low cytotoxicity except leaves and seeds ethanol extracts obtained in full flowering which showed toxicity against CHO and WI38 cells. CONCLUSIONS: Our study shows that ethanol crude extracts of leaves and seeds of Ocimum gratissimum in full flowering stage can be a good source of antitrypanosomal agents. This is the first report about the relation between the plant part extracted, the vegetative stage of the plant, the antitrypanosomal and antiplasmodial activities and the cytotoxicity of essential oils and non-volatile extracts of Ocimum gratissimum from Benin"
Keywords:		"Animals Antimalarials/*pharmacology Artemia/drug effects CHO Cells Cell Line Cell Survival Cricetinae Cricetulus Humans *Ocimum Oils, Volatile/*pharmacology Plant Extracts/*pharmacology Plant Leaves Plant Stems Plasmodium falciparum/drug effects Seeds Try;"
Notes:		"MedlineKpadonou Kpoviessi, Benedicta G H Kpoviessi, Salome D S Yayi Ladekan, Eleonore Gbaguidi, Fernand Frederich, Michel Moudachirou, Mansourou Quetin-Leclercq, Joelle Accrombessi, Georges C Bero, Joanne eng Research Support, Non-U.S. Gov't Ireland 2014/07/25 J Ethnopharmacol. 2014 Sep 29; 155(3):1417-23. doi: 10.1016/j.jep.2014.07.014. Epub 2014 Jul 21"