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Antioxidant and Neuronal Cell Protective Effects of Methanol Extract from Schizandra chinensis using an in vitro System  

Kim, Ji-Hye (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Jeong, Chang-Ho (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Choi, Gwi-Nam (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Kwak, Ji-Hyun (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Choi, Sung-Gil (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Heo, Ho-Jin (Division of Agriculture and Life Sciences and Institute of Agriculture and Life Science, Gyeongsang National University)
Publication Information
Korean Journal of Food Science and Technology / v.41, no.6, 2009 , pp. 712-716 More about this Journal
Abstract
In this study, the antioxidant and neuronal cell protective effects of methanol extract from Schizandra chinensis were evaluated. The proximate composition and total phenolics content of the extract were as follows: 64.88% nitrogen free extract, 10.56% crude fiber, 10.22% moisture, 8.33% crude protein, 5.05% ash, 0.96% crude fat, and 83.04 mg/g of total phenolics. In assays the methanol extract of Schizandra chinensis presented ferric reducing/antioxidant power (FRAP) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity in a dose-dependent manner. In a cell viability assay using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazoliumbromide (MTT), the methanol extract showed protective effect against $H_2O_2$-induced neurotoxicity, and lactate dehydrogenase (LDH) release into medium was also inhibited by various concentrations of extracts (68-80%). Cell viability after treatment of the methanol extract was higher than that shown for vitamin C ($100\;{\mu}M$) using a neutral red uptake (NRU) assay. Therefore, these data suggest that the methanol extract of Schizandra chinensis may be useful for neurodegenerative diseases including Alzheimer's disease.
Keywords
antioxidant activity; neuronal cell protective effect; Schizandra chinensis;
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