alexa Abstract | Evaluation of free radical scavenging activity of an ayurvedic formulation, Panchvalkala

Indian Journal of Pharmaceutical Sciences
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Research Paper Open Access

Abstract

We report the free radical scavenging activity of an Ayurvedic preparation Panchvalkala and its individual components (stem bark of Ficus benghalensis , F. glomerata , F. religiosa , F. virens and Thespesia populnea ). Being stem barks, these samples contain phenolics (ranging from 3.5% to 10.8% w/w) and tannins (1.6% to 7.0% w/w). This prompted us to study the free radical scavenging activity of Panchvalkala and its components which was evaluated in three in vitro models viz . 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity, superoxide radical scavenging activity and reducing power assay. Panchvalkala and its individual components showed significant antiradical activity by bleaching 1,1-diphenyl-2-picrylhydrazyl radical (EC 50 ranging from 7.27 to 12.08 µg) which was comparable to pyrogallol (EC 50 4.85 µg). Thin layer chromatography of the methanol extracts when sprayed with 0.2% 1,1-diphenyl-2-picrylhydrazyl in methanol revealed several bands with antiradical activity as seen by bleaching of 1,1-diphenyl-2-picrylhydrazyl. All the samples showed good superoxide scavenging potential (EC 50 ranging from 41.55 to 73.56 µg) comparable to ascorbic acid (EC 50 45.39 µg) in a dose-dependent manner. The reduction ability, Fe 3+ to Fe 2+ transformation was found to increase with increasing concentrations of all the sample extracts.

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Author(s): Sheetal Anandjiwala MS Bagul M Parabia M Rajani

Keywords

Antioxidant, DPPH, superoxide radicals, reducing power assay, Panchvalkala, Antioxidant, DPPH, superoxide radicals, reducing power assay, Panchvalkala

 
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