Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Effect of Korean Traditional Tea Materials Water Extract on Hepatic Oxygen Free Radical Generating and Scavenging Enzyme Activities in Lead Administered Rats

한국전통차 재료의 열수추출물이 납투여 흰주의 간조직 중 유해 활성산소 생성과 제거효소 활성에 미치는 영향

  • 김덕진 (대구대학교 식품·생명·화학 공학부) ;
  • 조수열 (영남대학교 식품영양학과) ;
  • 신경희 (영남대학교 식품영양학과) ;
  • 이미경 (경북대학교 식품생물산업연구소) ;
  • 김명주 (대구산업정보대학 식품영양과)
  • Published : 2003.03.01
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Abstract

This study was designed to test the effect of Korean traditional tea materials on oxygen-free radical metabolism in lead (Pb) -administered rats. Male rats were divided into normal, Pb-control (Pb-Con) and Pb-water extract of green tea (Camellia sinensis; GT) , persimmon leaf (Diospyros kaki; PL) , safflower seed (Carhamus tinctorius: SS) , Du-Zhong (Eucommia ulmoides; EU) groups, respectively. Pb intoxication was induced by administration of lead acetate (25 mg/kg. B.W., oral) weekly. The extract was administered based on 1.26 g of raw material/kg B.W./day for 4 weeks. When the GT, PL, SS and EU were supplemented to the Pb-administered rats, hepatic lipid peroxide levels were significantly lower compared to the Pb-Con group. Hepatic cytochrom P-450 content and aminopyrine N-demethylase activity was lower in the Pb-Con group than in the normal group, whereas xanthine oxidase activity was significantly elevated in Pb-administered rats. The water extract of GT, PL, SS and EU supplementation attenuated changes in enzyme activities generating reactive oxygen species in the liver. Hepatic superoxide dismutase, catalase and glucose 6-phosphate dehydrogenase activities were significantly higher in the Pb-Con group than in the normal group, while monoamine oxidase activity also tended to increase in the Pb-administered rats. However, glutathione peroxidase and glutathione S-transferase activities, and glutathione content significantly decreased through Pb intoxication. The supplementation of GT, PL, SS and EU induced alleviation changes of hepatic antioxidant enzyme activity.

한국전통차로 알려진 녹차, 감잎, 홍화 및 두충 열수추출물이 납투여된 흰쥐의 유해 활성산소 대사에 미치는 영향을 구명하기 위하여 체중 kg당 25 mg의 납을 매주 1회 경구 투여 하였다. 녹차, 감잎, 홍화 및 두충 열수추출물은 매일 일정시간에 체중 kg당 1.26 g 수준이 되도록 4주간 경구 투여 하여 사육한 결과 간조직 중 과산화지질 함량은 납 단독투여군이 정상군에 비하여 유의적으로 증가되었으며 한국전통차 급여시 과산화지질 생성을 현저하게 억제하는 것으로 나타났다. 간조직 중의 CYP 함량과 AD 활성은 납 투여시 유의적으로 감소되었으나 각각의 열수추출물 급여시 납투여로 억제된 활성이 회복됨으로써 한국전통차 급여가 CYP 함량과 산화적 디메틸화율을 증가시키는 것으로 관찰되었다. 또한 납투여로 증가된 간조직의 XO와 SOD의 활성은 녹차, 감잎, 홍화 및 두충 열수추출물 급여시 활성이 유의적으로 억제되었다. MAO 활성은 납 투여시 정상군에 비하여 유의적이지는 않으나 증가되었으며 녹차와 감잎 열수추출물 급여로 활성 증가가 현저하게 억제되었다. 간조직 중 CAT 활성은 납투여시 약 3.3배 증가되었는데 감잎군 37%, 녹차군 34%, 두충군 30%, 홍화군 28%, 순으로 억제되는 것을 관찰할 수 있었다. 또한 GSH-Px와 GST 활성 및 글루타티온 함량은 정상군에 비하여 납 단독투여시 유의적인 감소를 보였으나 한국전통차 급여로 회복되었다. GR 활성은 실험군간에 변화가 관찰되지 않았으나 G6PD 활성은 납투여로 증가된 활성이 실험식이 급여시 유의적으로 감소되었다.

Keywords

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