Activity against Mycobacterium smegmatis and M. tuberculosis by extract of South African medicinal plants

Mativandiela, Sannah Patience Nkami, Meyer, Jacob Jacobus Marion, Hussein, Ahmed A., Houghton, Peter J., Hamilton, Chris J. and Lall, Namrita (2008) Activity against Mycobacterium smegmatis and M. tuberculosis by extract of South African medicinal plants. Phytotherapy Research, 22 (6). pp. 841-845. ISSN 0951-418X

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Abstract

Seven ethnobotanically selected medicinal plants were screened for their antimycobacterial activity. The mininium inhibitory concentration (MIC) of four plants namely Artemisia afra, Dodonea angustifolia, Drosera capensis and Galenia africana ranged from 0.781 to 6.25 mg/mL against Mycobacterium smegmatis. G. africana showed the best activity exhibiting an MIC of 0.78 mg/mL and a minimum bactericidal concentration (MBC) of 1.56 mg/mL. The MICs of ethanol extracts of A angustifolia and G. africana against M. tuberculosis were found to be 5.0 and 1.2 mg/mL respectively. The mammalian cytotoxicity IC50 value of the most active antimycobacterial extract, from G. africana, was found to be 101.3 mu g/mL against monkey kidney Vero cells. Since the ethanol G. africana displayed the best antimycobacterial activity, it was subjected to fractionation which led to the isolation of a flavone, 5,7,2'-trihydroxyflavone. The MIC of this compound was found to be 0.031 mg/mL against M. smegmatis and 0.10 mg/mL against M. tuberculosis. This study gives some scientific basis to the 14 traditional use of these plants for TB-related symptoms. Copyright (C) 2008 John Wiley & Sons, Ltd.

Item Type: Article
Faculty \ School: Faculty of Science > School of Pharmacy
Depositing User: Rachel Smith
Date Deposited: 17 May 2011 15:36
Last Modified: 21 Apr 2020 18:59
URI: https://ueaeprints.uea.ac.uk/id/eprint/30709
DOI: 10.1002/ptr.2378

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