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Hepatoprotective Activities of Rosa davurica Root Extract in Rats Intoxicated with Bromobenzene

브로모벤젠으로 유도된 간독성 흰쥐에서 생열귀나무 뿌리의 간보호활성

  • Park, Jong-Cheol (Department of Oriental Medicine Resources and Research Institute of Korean Oriental Medicine, Sunchon National University) ;
  • Hur, Jong-Moon (Department of Oriental Medicine Resources and Research Institute of Korean Oriental Medicine, Sunchon National University) ;
  • Hwang, Young-Hee (Department of Forestry, Chonbuk National University) ;
  • Choi, Myeong-Rak (Department of Biotechnology, Yosu National University) ;
  • Kim, Suk-Nam (Rosa davurica Institute, Korea National Agricultural College) ;
  • Choi, Jong-Won (Department of Pharmacy, Kyungsung University)
  • Published : 2003.04.01

Abstract

To investigate hepatoprotective activities of the root extract of Rosa davurica, the activities of hepatic enzymes, aminopyrine N-demethylase, aniline hydroxylase, glutathione S-transferase and epoxide hydrolase in rats intoxicated with bromobenzene were studied. Pretreatment with the methanol extract from the roots of Rosa davurica did not show any significant effects on the increases of the activities of aminopyrine N-demethylase and aniline hydroxylase, enzymes forming toxic epoxide by bromobenzene. There was no change in glutathione S-transferase activity by Rosa davurica. However, the activity of epoxide hydrolase, and epoxide-removing enzyme, was increased 33% by the administration of 500 mg/kg of the methanol extract. From the results, the protection of Rosa davurica against bromobenzene-induced hepatotoxicity is thought to be via enhancing the activity of epoxide hydrolase, an enzyme removing toxic epoxide rather than through epoxide-producing system.

Bromobenzene으로 간독성을 유발한 흰쥐에 생열귀나무 뿌리를 투여하여 bromobenzene 대사계에 미치는 효소활성을 관찰하였다. Bromobenzene은 bromobenzene 2,3-oxide와 bromobenzene-3, 4-oxide로 전환되며, 3,4-oxide는 독성물질로서 epoxide hydrolase에 의해 무독성 bromobenzene-3,4-dihyrodiol로 대사 또는 glutathione S-transferase에 의하여 배설되기도 한다. 중국 민간에서 강장제로 사용하는 생열귀나무는 한방에서 소화불량, 위통 등의 치료에 사용되는 약용식물이다. 생열귀나무의 뿌리 추출물은 흰쥐의 간 epoxide 생성계에 관여하는 aminopyrine N-demethylase, aniline hydroxylase 활성과 epoxide를 대사시키는 glutathione S-transferase 활성에는 변화를 주지 않았다. 그러나 생열귀추출물 500 mg/kg 경구투여군은 eporide를 무독화시키는 epoxide hydrolase 활성에서 bromobenzene 투여로 효소활성이 저하된 대조군보다 33% 활성을 회복시켰다. 따라서 생열귀나무 뿌리는 간독성물질인 bromobenzene 대사에 관여하는 epoxide hydrolase 활성 증가로 인해 간보호작용이 일어나는 것으로 판단된다.

Keywords

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