Antimycobacterial and cytotoxic activity of selected medicinal plant extracts

Show simple item record Nguta, J.M. Appiah-Opong, R. Nyarko, A.K. Yeboah-Manu, D. Addo, P.G.A. Otchere, I. Kissi-Twum, A. 2019-02-13T12:57:42Z 2019-02-13T12:57:42Z 2016-04
dc.identifier.other doi: 10.1016/j.jep.2016.02.010
dc.description.abstract Ethnopharmacological relevance Tuberculosis (TB) caused by Mycobacterium tuberculosis remains an ongoing threat to human health. Several medicinal plants are used traditionally to treat tuberculosis in Ghana. The current study was designed to investigate the antimycobacterial activity and cytotoxicity of crude extracts from five selected medicinal plants. Material and methods The microplate alamar blue assay (MABA) was used for antimycobacterial studies while the CellTiter 96® AQueous Assay, which is composed of solutions of a novel tetrazolium compound [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt; MTS] and an electron coupling reagent (phenazine methosulfate) PMS, was used for cytotoxic studies. Correlation coefficients were used to compare the activity of crude extracts against nonpathogenic strains and the pathogenic Mycobacterium tuberculosis subsp.tuberculosis. Results Results of the MIC determinations indicated that all the crude extracts were active on all the three tested mycobacterial strains. Minimum inhibitory concentration values as low as 156.3 μg/mL against M. tuberculosis; Strain H37Ra (ATCC® 25,177™) were recorded from the leaves of Solanum torvum Sw. (Solanaceae). Cytotoxicity of the extracts varied, and the leaves from S. torvum had the most promising selectivity index. Activity against M. tuberculosis; Strain H37Ra was the best predictor of activity against pathogenic Mycobacterium tuberculosis subsp.tuberculosis (correlation coefficient=0.8). Conclusion The overall results of the present study provide supportive data on the use of some medicinal plants for tuberculosis treatment. The leaves of Solanum torvum are a potential source of anti-TB natural products and deserve further investigations to develop novel anti-TB agents against sensitive and drug resistant strains of M. tuberculosis. © 2016 The Authors. en_US
dc.language.iso en en_US
dc.publisher Journal of Ethnopharmacology en_US
dc.subject Antimycobacterial en_US
dc.subject Crude extracts en_US
dc.subject Cytotoxicity en_US
dc.subject Medicinal plants en_US
dc.subject Selectivity en_US
dc.subject Tuberculosis en_US
dc.title Antimycobacterial and cytotoxic activity of selected medicinal plant extracts en_US
dc.type Article en_US

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  • Clinical Pathology Department [55]
    The Clinical Pathology Department conducts research that contributes to intervention strategies and safeguards of public health in Ghana. In view of this the Department carries out research into plant medicine development, drug interactions and regulation, bio-monitoring and prevention of poisoning from environmental toxicants (e.g. mycotoxins specifically aflatoxins and toxic heavy metals). The Department also provides specialized laboratory services in support of public health programmes.

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