RT Journal Article ID 66e7cdbc680b0d6a A1 Sharma, K. V. A1 Singh, Umang A1 Vats, Sharad A1 Priyadarsini, K. I. A1 Bhatia, A. L. A1 Kamal, Raka T1 Evaluation of Evidenced-Based Radioprotective Effi cacy of Gymnema sylvestre Leaves in Mice Brain JF Journal of Environmental Pathology, Toxicology and Oncology JO JEP(T) YR 2009 FD 2010-01-22 VO 28 IS 4 SP 311 OP 323 K1 Gymnema sylvestre K1 DPPH• scavenging assays K1 superoxide radical scavenging assays K1 protein carbonyl estimation assay K1 pulse radiolysis K1 mice brain K1 in vivo studies AB A Gymnema sylvestre leaves extract (GSE) rich in gymnemic acids was examined for its antioxidant activities through various in vitro assays, along with its radioprotective efficacy in mice brain. The IC50 values of GSE for 2,2-diphenyl-1-picrylhydrazyl scavenging assays, superoxide radical scavenging assays, inhibition of in vitro lipid peroxidation assays, and protein carbonyl formation assay were 238, 140, 99.46, and 28.03 μg/mL, respectively. Furthermore, the total phenolic content in GSE was equivalent to 18.06 μg/mL of Gallic acid. The rate of •OH radical scavenging activity of GSE is 0.46 times slower than SCN− derived from nanosecond pulse radiolysis studies. Results of in vivo studies showed that radiation (8 Gy)-induced augmentation in the levels of lipid peroxidation and depletion in glutathione and protein levels in mice brain were significantly ameliorated by GSE pretreatment. Results suggest that the radioprotective effi cacy of GSE may be due to its antioxidant properties. PB Begell House LK https://www.dl.begellhouse.com/journals/0ff459a57a4c08d0,53151bb00a708171,66e7cdbc680b0d6a.html