Please use this identifier to cite or link to this item: https://openscholar.ump.ac.za/handle/20.500.12714/34
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dc.contributor.authorOtang-Mbeng, Wilfred.en_US
dc.date.accessioned2020-10-07T10:12:09Z-
dc.date.available2020-10-07T10:12:09Z-
dc.date.issued2019-
dc.identifier.urihttps://openscholar.ump.ac.za/handle/20.500.12714/34-
dc.description.abstractAlthough orthodox medications are available for skin diseases, expensive dermatological services have necessitated the use of medicinal plants as a cheaper alternative. This study evaluated the pharmacological and phytochemical profiles of four medicinal plants (Drimia sanguinea, Elephantorrhiza elephantina, Helichrysum paronychioides, and Senecio longiflorus) used for treating skin diseases. Petroleum ether and 50% methanol extracts of the plants were screened for antimicrobial activity against six microbes: Bacillus cereus, Shigella flexneri, Candida glabrata, Candida krusei, Trichophyton rubrum and Trichophyton tonsurans using the micro-dilution technique. Antioxidant activity was conducted using 2,2-diphenyl-1-picryhydrazyl (DPPH) free radical scavenging and β-carotene linoleic acid models. Cytotoxicity was determined against African green monkey Vero kidney cells based on the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric assay. Spectrophotometric and Gas Chromatography-Mass Spectrometry (GC-MS) methods were used to evaluate the phytochemical constituents. All the extracts demonstrated varying degrees of antimicrobial potencies. Shigella flexneri, Candida glabrata, Trichophyton rubrum and Trichophyton tonsurans were most susceptible at 0.10 mg/mL. In the DPPH test, EC50 values ranged from approximately 6–93 µg/mL and 65%–85% antioxidant activity in the β-carotene linoleic acid antioxidant activity model. The phenolic and flavonoid contents ranged from 3.5–64 mg GAE/g and 1.25–28 mg CE/g DW, respectively. The LC50 values of the cytotoxicity assay ranged from 0.015–5622 µg/mL. GC-MS analysis revealed a rich pool (94–198) of bioactive compounds including dotriacontane, benzothiazole, heptacosane, bumetrizole, phthalic acid, stigmasterol, hexanoic acid and eicosanoic acid, which were common to the four plants. The current findings provide some degree of scientific evidence supporting the use of these four plants in folk medicine. However, the plants with high cytotoxicity need to be used with caution.en_US
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.relationGrant number 105161en_US
dc.relation.ispartofPlantsen_US
dc.subjectAntioxidant.en_US
dc.subjectAntibacterial.en_US
dc.subjectAntifungal.en_US
dc.subjectFlavonoids.en_US
dc.subjectMinimum inhibitory concentration.en_US
dc.subjectPhenols.en_US
dc.subjectGas chromatography-mass spectrometry (GC-MS).en_US
dc.titleAntimicrobial activity, antioxidant potential, cytotoxicity and phytochemical profiling of four plants locally used against skin diseases.en_US
dc.typejournal articleen_US
dc.relation.datasetTable S1: Excel sheet of compounds identified by GC-MS in both polar and non-polar extracts of four medicinal plants used for skin diseases. This dataset is available at http://www.mdpi.com/2223-7747/8/9/350/s1en_US
dc.identifier.doi10.3390/plants8090350-
dc.identifier.urlhttps://www.mdpi.com/2223-7747/8/9/350-
dc.contributor.affiliationSchool of Biology and Environmental Sciencesen_US
dc.relation.issn2223-7747en_US
dc.description.volume8en_US
dc.description.issue350en_US
dc.description.startpage1en_US
dc.description.endpage19en_US
dc.relation.grantnoNational Research Foundation (NRF) and Department of Science and Technology, Pretoria, South Africa funded the research. Additional funding was provided by the North West University (Faculty of Natural & Agricultural Sciences) and University of Mpumalanga, South Africa.en_US
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.languageiso639-1en-
item.fulltextWith Fulltext-
item.grantfulltextopen-
item.openairetypejournal article-
crisitem.author.deptSchool of Biology and Environmental Sciences-
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