Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Effects of Green Tea Powder or Antioxidant Vitamin Supplementation on Lipid Peroxidation and Antioxidant Enzyme Activities in 9 Month- and 12 Month-old Rat Brain Regions

녹차 건분이나 항산화 비타민 보충이 9개월령과 12개월령 흰쥐의 부위별 뇌조직에 미치는 항산화 효과

  • 장남수 (이화여자대학교 가정과학대학 식품영양학과) ;
  • 최지형 (이화여자대학교 가정과학대학 식품영양학과)
  • Published : 2002.05.01
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Abstract

This study was performed to investigate the effects of green tea or antioxidant vitamins on lipid peroxidation and antioxidant enzyme system in various regions of rat brain aged 9 and 12 months. Male Sprague-Dawley rats were raised on the experimental diets; 3% green tea powder diet, antioxidant vitamins diet containing the $\beta$-carotene, vitamin C, vitamin E in the level same as in the 3% green tea powder diet, and control diet far 3 weeks. We measured concentrations of malondialdehyde (MDA) and the activities of superoxide dismutase (SOD), catalase, and glutathione peroxide (GSH-Px) in various brain regions such as cortex, cerebellum, striatum, and hippocampus. Green tea powder or antioxidant vitamin supplementation decreased MDA concentrations in the striatum and the hippocampus, and increased SOB activities in the striatum, and GSH-Px activities in the cortex. There was no significant difference in the observed antioxidative effects between the green tea powder and antioxidant vitamin supplementation. A significant difference between 9 month- and 12 month-old rats was found in MDA concentrations and GSH-Px activities in all brain regions. These results suggest that green tea powder can have protective effects on various regions of rat brain and that these effects on lipid peroxidation and antioxidant enzymes are different by age. In inhibiting lipid peroxidation, there was no difference between green tea powder and antioxidant vitamins.

본 연구에서는 녹차 건분 식이나 항산화 비타민 보충식이가 뇌 조직의 항산화능 증진효과를 가지고 있는지를 보고자, 생후 9개월령과 12개월령 Sprague-Dawley종 실험동물에게 3% 녹차 건분식이와 항산화 비타민 보충식이를 3주간 공급하였다 희생 후 뇌 조직을 대뇌, 소뇌, 선조체, 해마로 나누어 malondialdehyde (MDA)의 함량과 catalase, superoxide dismutase (SOD) , glutathione peroxidase (GSH-Px)의 활성을 측정하였다. 본 실험 결과를 종합하여 볼 때, 3% 녹차 건분 식이의 공급은 선조체 내 SOD활성과 대뇌 내 GSH-Px활성을 12개월령에서 증가시키는 것으로 나타났고, 녹차군과 항산화 비타민군의 항산화능에는 서로 유의적인 차이가 없었다. 가령에 따라 부위별 뇌조직의 MDA 함량은 증가하였고, GSH-Px 활성은 감소하는 것으로 나타났다 이러한 결과는 3% 녹차 건분 식이의 항산화능 증진효과가 녹차 건분에 함유된 항산화 비타민에 기인한 것일 수 있으며 , 가령에 따라 항산화 효소 활성의 변화가 효소의 종류에 따라 달라질 수 있다는 것을 보여준다.

Keywords

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