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http://dx.doi.org/10.3746/jkfn.2013.42.10.1525

Antioxidant Activities of Hot Water Extract from Cornus walteri Wanger against Oxidative Stress Induced by tert-Butyl Hydroperoxide in HepG2 Cells  

Yeon, Seong Ho (Dept. of Food Science and Technology, Chungbuk National University)
Ham, Hyeonmi (Dept. of Food Science and Technology, Chungbuk National University)
Sung, Jeehye (Dept. of Food Science and Technology, Chungbuk National University)
Kim, Younghwa (Dept. of Food Science and Technology, Chungbuk National University)
Namkoong, Seulgi (Dept. of Food Science and Technology, Chungbuk National University)
Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University)
Lee, Junsoo (Dept. of Food Science and Technology, Chungbuk National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.42, no.10, 2013 , pp. 1525-1532 More about this Journal
Abstract
The objective of this study was to investigate the effect of hot water extract from Cornus walteri Wanger (CWE) on tert-butyl hydroperoxide (TBHP)-induced oxidative stress in HepG2 cells. Generation of reactive oxygen species (ROS), concentrations of cellular lipid peroxidation products and reduced glutathione, and antioxidant enzyme activity were used as biomakers of cellular oxidative status. Cells pretreated with CWE (25~200 ${\mu}g/mL$) showed an increased resistance to oxidative stress in a dose-dependent manner, as revealed by a higher percentage of surviving cells compared to control cells. ROS generation induced by TBHP was significantly reduced when cells were pretreated with 200 ${\mu}g/mL$ CWE for 4 h. Pretreatment with CWE (5~50 ${\mu}g/mL$) prevented the decrease in reduced glutathione and the increase in malondialdehyde and ROS evoked by TBHP in HepG2 cells. Finally, CWE pretreatments prevented the significant increase of glutathione peroxidase, catalase, glutathione reductase, and superoxide dismutase activities induced by TBHP. These results show that CWE has significant protective ability against a TBHP-induced oxidative insult and that the modulation of antioxidant enzymes by CWE may have an important antioxidant effect on TBHP-induced oxidative stress in HepG2 cells.
Keywords
antioxidants; HepG2 cell; tert-butyl hydroperoxide; Cornus walteri Wanger; oxidative stress;
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