29/08/2016
Section B: HERBAL CHEMISTRY Vol. 5 Issue 3.
Title: In Vitro Antioxidant Activity of Aqueous and Alcoholic Extracts of Polyherbal Rejuvenator Formulation Assessed in Free Radical Scavenging Assays
Authors: M. Gupta, N. Karmakar, S. Sasmal, S. Chowdhury and S. Biswas
Abstract: The present study evaluates the in vitro antioxidant free radical scavenging capacities of aqueous and alcoholic extracts of a herbal rejuvenator drug prepared by adding equal amounts of dried roots of Sida cordifolia and Glycyrrhiza glabra because these two medicinal plants have been used since ancient times in the Ayurvedic system of medicine and elaborated in its ancient texts such as Charak Samhita (Chikitsa Sthanam). Phytochemical analysis indicated the presence of flavonoids, tannins, carbohydrates and saponins. The total phenolic content of the alcoholic extract and the aqueous extract was found as 26.50 and 28.60 Gallic acid equivalents/mg while the total flavonoid content was assessed as 85.91 and 80.31 Quercetin equivalents/mg respectively. IC50 (µg/ml) of alcoholic, aqueous extract and Ascorbic acid was found to be 57.027±5.200, 44.507±1.252 and 17.48±1.356 in Hydrogen Peroxide Radical Scavenging, 0.823±0.033, 0.745±0.075 and 0.722±0.090 in DPPH radical scavenging and 232±15.163, 179±53.894 and 6.627±0.061 during FRAP essay. Similarly, during ABTS radical scavenging, IC50 (µg/ml) was assessed as 332.960±2.177, 162.155±9.736 and 6.779±0.167 for alcoholic, aqueous extract and Trolox respectively. While both the extracts showed substantial and significant free radical scavenging activity during the study which is compared to that of the standard drug, the aqueous extract of the herbal rejuvenator research drug exhibits higher in vitro antioxidant activity than the alcoholic extract possibly due to higher concentrations of phenolic compound in it, validating and confirming therapeutic properties ascribed to it in Ayurvedic texts.
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