생명과학회지 (Journal of Life Science)

  • 제12권3호
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  • Pages.349-356
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  • 2002
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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인삼 추출물이 난소를 절제한 백서의 항산화효소 활성에 미치는 영향

The Effects of Panax Ginseng Extract on Antioxidative Enzyme Activity in Ovariectomized Rats

  • 하배진 (신라대학교 공과대학 생명공학전공) ;
  • 황일영 (충남대학교 의과대학 의학과)
  • 발행 : 2002.06.01
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초록

노화과정에 산소라디칼이 관여할 가능성을 노화유도된 쥐를 동물모델로 하여 알아보았다. 난소를 절제한 rat와 난소를 절제하지 않은 정상의 rat에서의 생리활성에 미치는 인삼 추출물의 효과를 연구하였다. 난소를 절제한 rat에 각각 GTS (Ovx+GTS 군)와 GW (Ovx+GW 군)를 투여하고, 이것과 비교하기 위해 난소를 절제한 대조군(Ovx군)과 마지막으로 난소를 절제하지 않은 정상군(Sham군)으로 하여 항산화효과에 관한 실험방법으로 진행하였다. 노화유도된 쥐의 각 조직에서 lipid peroxidation이 증가되었고 free radical반응이 더 심하게 일어난 간 조직에서 노화진행이 그만큼 촉진되었음을 알 수 있었다. 간소라디칼반응이 항진된 원인을 규명코자 간 조직에서 미토콘드리아와 세포질분획에서 항산화효소의 활성을 조사한 결과, SOD와 glutathion reductase활성이 감소되었으며 노화나 지질과산화가 심하게 진행되었던 간 조직에서 이들 항산화효소의 활성감소가 심한 경향을 나타내었다. 생체는 free radical을 조절할 수 있는 다양한 항산화계가 존재하여 free radical을 효율적으로 제거함으로써 생체의 항상성을 유지할 수 있다. 이러한 항산화계에는 superoxide dismutase (SOD), glutathion (GSH) peroxidase, GSH reductase, GSH S-transferase, catalase등의 항산화효소가 있다. SOD는 반응성을 가진 산소species인 superoxide anion을 macrophage와 polymorphonuclear leucocyte의 항균작용같은 세포방어기구에서 중요한 역할을 한다. 원칙상 눈, 피부등의 byaus이 공기중의 산소에 노출되면 oxidative stress가 커짐으로서 조직이 훼손되나 SOD같은 효소에 의해 보호되고 손상이 방지되는 것으로 알려지고 있다. 실제로 신체부위에 적용해 보면 쉽게 활성상실이 일어나므로 fatty arid와 공유결합시켜 효과적으로 superoxide radical을 제거할 수 있다. AST의 활성은 Ovx군이 Sham군에 비해 2.11배 높게 나타났으며, ALT 활성은 변화가 나타나지 않았다. AST 활성에서는 각각의 물질을 투여한 군에서는 유의적인 감소 경향을 보였다. 과산화지질함량은 Ovx군이 Sham군에 비해 높게 나타났으며, 각각의 인삼추출물을 투여한 군에서는 62%∼72%의 저해률을 보였다. 항산화 효소들은 Sham군에 비해 Ovx군에서 낮게 나타났는데, 각 물질의 투여 군에서는 유의성있는 증가를 보였다. 이러한 결과에서 보듯이, 난소 절제로 생성된 많은 free radical은 항산화효소에 의해서 감소되었으며, 그리고 인삼 추출물이 항산화 효소 대신에 노화를 저해하는 작용을 하는 것으로 사료되었다.

In order to observe the bioactivity of ovariectomized rats, nonovariertoized (sham) group, ovariectomized (Ovx) group, ovariectomized ginseng total saponin (GTS)-treated (Ovx+ GTS) group and ovariectomized ginseng water extract (GW)-treated (Ovx+CW) group were made. We measured AST (L-aspartate aminotransferase) and ALT (L-alanin aminotransferase) in sera, and MDA (malondialdehyde:lipid peroxidation), SOD (superoxide dismutase), catalase, total-glutathione (GSH + GSSG) and GPx (glutathione peroxidase) in liver tissue total homogenates of rat. AST activity of serum in Ovx group was 2.11 times increased, but ALT activity was not changed compared to Sham group. In AST activity, they tend to decrease significantly in each substance such as GTS and GW administered group. Lipidperoxides of each fraction in Ovx group were highly increased compared to Sham group. Extracts of ginseng-treated group markedly inhibited lipid peroxidation by 62% ∼72%. And as the result of the measurements of SOD, catalase, total-glutathione and GPx which are antioxidant enzyme, antioxidant enzymes in Ovx group much lower than in Sham group. But they were significantly increased in each substance such as GTS and GW, administered group. Based on the results, it is supposed that more produced free radicals decreased antioxidant enzyme. And it is also thought that extracts of ginseng can inhibit aging by reducing antioxidant enzyme.

키워드

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