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• W2893339103 abstract "Holarrhena mitis (Vahl) R.Br. ex Roem. & Schult. which is an endemic plant growing mainly in the dry regions of the low-country has been used in the treatment of dysentery in Ayurvedic medicine. During the present study, we tested antibacterial, antifungal, antioxidant activities and brine shrimp lethality, as well as the total phenolic content of the dichloromethane, ethyl acetate and methanol extracts of the bark and leaves of H. mitis . The methanol extract of bark produced a measurable zone of inhibition against two Candida species, namely Candida albicans , Candida krusei among all five tested species and against both dermatophytes, Microsporum gypseum and Tricophyton mentagrophytes . In addition, the methanol extract of bark showed very strong antifungal activity against C . krusei (20 mm), which is very close to that of the positive control ketoconazole (22 mm). Both dicholoromethane extracts of bark and leaves and methanol extracts of leaves showed an activity against both tested strains of Staphylococcus aureus but were negative against Escherichia coli and Salmonella enteritidis . However, the rest of the extracts exerted an active against all the tested bacterial strains. In the brine shrimp cytotoxicity assay, the dichloromethane extracts of both leaves and bark showed lower LC 50 values (27.13 ppm and 9.38 ppm, respectively) than that of positive control, K 2 Cr 2 O 7 , (35.74 ppm) indicating cell toxicity. Compared to the positive control, DL-α-tocopherol (IC 50 : 12.2 ppm), the antioxidant activity of the ethyl acetate and methanol extracts of leaves exhibited comparable activity (IC 50 :16.9 ppm and 29.8 ppm, respectively). Antioxidant activity correlated well with the polyphenol content of methanol and ethyl acetate extracts (473.25 and 138.74 mg (GAE) /g, respectively) of leaves, with respect to gallic acid. These empirical results revealed that methanol extract of bark of H. mitis showed strong antifungal activity as well as very low brine shrimp lethality indicating that it would be a potential nontoxic anti-fungal natural product. The dichloromethane extracts exhibited strong brine shrimp lethality and may contain potential natural anticancer lead compounds. Ethyl acetate extracts of both leaves and bark having significant antibacterial activity, would be source of potential antibacterial lead compounds." @default.
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• W2893339103 date "2018-09-25" @default.
• W2893339103 modified "2023-09-26" @default.
• W2893339103 title "Antibacterial, antifungal, antioxidant, brine shrimp lethality and polyphenolic content of <i>Holarrhena</i> <i>mitis</i> (Vahl) R.Br. ex Roem. & Schult" @default.
• W2893339103 doi "https://doi.org/10.4038/cjs.v47i3.7533" @default.
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