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In Vitro Evaluation of Antioxidant and Anti-inflammatory Properties of Methanol and Dichloromethane Extracts of the Leaf of Globimetula oreophila

Aims: The study was designed to investigate the antioxidant and membrane stabilizing potentials of the leaf of Globimetula oreophila, with a view to providing scientific support for the acclaimed ethnomedicinal or traditional uses of the plant. Methodology: The study involved collection, identification, drying, pulverizing, extraction and fractionation of extracts of the dried leaves of G. oreophila. Anti-inflammatory and antioxidant activities of the extracts and fractions were evaluated using red blood cell membrane stabilization Original Research Article Faboro et al.; CSIJ, 23(3): 1-15, 2018; Article no.CSIJ.42051 2 technique, while assays (2,2-diphenyl-1-picrylhydrazyl hydrate, nitric oxide, total antioxidant capacity and ferric reducing antioxidant power). Results: The results revealed that the extracts and the fractions of G. oreophila exhibited potent antioxidant activities. Fraction 1 of the methanol extract exhibited the highest antioxidant activity with IC50 of 45.83 ± 0.13 μg/ml while fraction 7 of the same extract was the most potent in stabilizing stressed red blood cells having 100±0.00% membrane stability. The activities of both the fractions and the extracts of G. oreophila compared favourably with the standard antioxidant and antiinflammatory drugs. Moreover, the activities of the fractions and extracts are concentration dependent. Conclusion: The study revealed that the extracts and fractions of G. oreophila possess and exhibit anti-inflammatory and antioxidant activities which were concentration dependent and compared favourably with those of nonsteroidal anti-inflammatory drugs.