Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidant Activities of Hot Water Extract from Cornus walteri Wanger against Oxidative Stress Induced by tert-Butyl Hydroperoxide in HepG2 Cells

tert-Butyl Hydroperoxide로 산화 스트레스가 유도된 HepG2 세포에서 말채나무 열수추출물의 항산화 활성

  • 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)
  • Received : 2013.06.17
  • Accepted : 2013.07.29
  • Published : 2013.10.31
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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.

말채나무 열수추출물의 항산화 활성을 알아보기 위해 HepG2 세포에 TBHP로 산화 스트레스를 유도한 뒤 말채나무 열수추출물의 세포 보호효과, ROS 생성억제, 지질과산화 억제 및 GSH 생성에 미치는 영향에 대해 살펴보았다. 말채나무 열수추출물은 HepG2 세포에 TBHP로 산화 스트레스를 유도한 뒤 나타나는 세포독성에 대해 농도 의존적으로 유의하게 세포 보호효과를 보였으며, ROS 생성과 과산화물에 대한 지표로서 측정한 MDA도 말채나무 열수추출물에 의해 효과적으로 억제되었다(P<0.05). 또한 항산화 성분으로 생체 내에서 산화 및 환원반응에 중요한 역할을 하며 항산화 효소인 GSH-Px, GST에 전자공여체로 작용하는 GSH의 생성촉진 효능에서도 말채나무 열수추출물은 산화 스트레스로 감소된 GSH의 생성을 농도 의존적으로 촉진시켰다(P<0.05). 산화 스트레스에 의해 활성이 증가된 항산화 효소(CAT, SOD, GSH-Px, GR)도 말채나무 열수추출물의 처리로 감소하는 경향을 보였다. 이러한 결과로 미루어 보아 말채나무 열수 추출물은 인체 내에서 질병과 노화를 일으키는 원인 물질인 활성산소에 대해 강한 항산화 활성을 나타냄에 따라 보다 다양한 형태의 소재로 활용될 수 있을 것으로 생각된다.

Keywords

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