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In vitro Antioxidant and Cytoprotective Activities of the Extract of Dangyuja (Citrus grandis Osbeck) Leaves  

Kim, Yun-Jung (Faculty of Biotechnology, College of Applied Life Sciences, Cheju National University)
Cho, Moon-Jae (Department of Medicine, Medical School, Cheju National University)
Kim Cho, So-Mi (Faculty of Biotechnology, College of Applied Life Sciences, Cheju National University)
Publication Information
Food Science and Biotechnology / v.17, no.5, 2008 , pp. 1086-1091 More about this Journal
Abstract
The antioxidant activities of the extracts of dangyuja (Citrus grandis Osbeck) leaves were evaluated. The highest phenolic content was obtained from the ethyl acetate fraction (EF) (202.1$\pm$0.8 mg GAE/g dried extract) and it exhibited the highest 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity. The cytoprotective effects of EF on oxidative damage induced by tert-butyl hydroperoxide (t-BHP) in a human hepatoma cell line, HepG2 cells, were investigated to understand the intracellular antioxidant mechanisms. Treatment of HepG2 cells with EF prior to oxidative stress was found to inhibit reactive oxygen species (ROS) generation, lipid peroxidation, and DNA damage in a dose-dependent manner. Gas chromatography-mass spectrometry (GC-MS) studies on EF resulted in tentative identification of 19 compounds representing 94.3% of the total content. Taken together, these results demonstrated that EF has excellent antioxidant activities and thus dangyuja leaves have great potential as a source for natural antioxidant which can be applied in food products.
Keywords
Citrus grandis Osbeck; antioxidant; DPPH radical scavenging; tert-butyl hydroperoxide; HepG2 cell;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By Web Of Science : 5  (Related Records In Web of Science)
Times Cited By SCOPUS : 4
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