The Journal of Korean Medicine (대한한의학회지)

The Society of Korean Medicine (대한한의학회)
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Physiological Activity and Effects on Lipid Peroxidation of Hot Water-Extract Obtained from Euonymus alatus in Cultured Rat Hepatocyte

Rat의 hepatocyte에서 $amyloid-{\beta$}$로 유발된 세포사, 지질과산화 및 세포산화에 대한 귀전우 열수 추출물의 보호효과

  • Soo-Sung, Kim (Department of Internal Medicine, College of Oriental Medicine, Dongguk University) ;
  • Jong-Dae, Kim (Department of Internal Medicine, College of Oriental Medicine, Dongguk University)
  • Published : 2001.06.01
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Abstract

This study was carried out to investigate the physiological activityof the water extract from EA. The present study was done to investigate the effects of EA on cultured hepatocyte cell system and lipid peroxidation in $A{\beta}$ treatment conditions. Pretreatment of EA attenuated in cell cytotoxicity enhanced by increasing concentrations of $A{\beta}$. MDA level induced by $A{\beta}$ treatment was significantly increased and the level was slightly reduced by pretreatment of EA. The ability of EA to reduce cell death and MDA level induced by $A{\beta}$ suggest that EA may be a protective agent against free radical generating compounds such as $A{\beta}$. EA exhibited anti oxidative activity at all concentration tested.The extract was as good as antioxidative activity of the synthetic antioxidants, butylated hydroxy toluene and ascorbic acid. Furthermore, this was superior to that of natural antioxidant, a-tocopherol. In the presence of heavy metal ions ($Fe^{2+},{\;}Zn^{2+}$), EA showed strong antioxidative activity. The extracts showed about 3075% in the nitrite scavenging effect under pH 1.2 and $37^{\circ}C$ for 1 hr. There was significant difference among concentration of extracts.

목적 : 귀전우 Euonymus alatus (Thunb.) Sieb로부터 얻은 추출물에 대하여 생리활성(항산화 활성)을 검토하였고, $amyloid-{\beta}{\;}(A{\beta})$가 지니는 Rat의 배양 Hepatocyte 세포독성에 대한 세포보호효과 및 세포막 지질의 과산화에 미치는 영향을 검토하였다. 방법 : 귀전우 추출물과 항산화제인 BHT. ascorbic acid 및 ${\alpha}-tocopherol$을 각각 linoleic acid에 소정량 첨가하고 $50^{\circ}C$에서 일정기간 저장하여 linoleic acid의 산화 안정성을 비교 검토하였으며, 또한 유지 자동산화의 촉진인자인 금속이온($Fe^{3+},{\;}Zn^{2+}$) 을 첨가하여 귀전우 추출물의 금속이온봉쇄효과를 조사하였다. 결과 :세포성지질의 과산화의 지표인 malondialdehyde(MDA)생성이 A{\beta}처리로 크게 증가하였으나 세포막파괴에 의한 세포파괴의 전형적인 현상이 귀전우 열수 추출물의 전처리와 후처리로 크게 감소되었다. 귀전우 추출물의 농도에 따른 항산화 효과는 전 농도별에서 높은 항산화 효과를 나타내었다. 그리고 시간 경과에 따른 항산화 효과에 있어서도 정도의 차이는 있지만 각 농도(5mg, 10mg 및 25mg)에서 유도기의 연장효과가 상당히 우수한 것으로 나타났다. 귀전우 추출물과 항산화제와의 비교에 있어서는 합성 항산화제인 BHT 및 ascorbic acid 만큼 우수한 항산화력을 나타내었으며, 천연 항산화제인 ${\alpha}-tocopherol$ 보다는 아주 우수한 것으로 나타났다. 귀전우 추출물의 금속이온 봉쇄효과에 있어서는 linoleic acid에 귀전우 추출물과 $Fe^{3+}$ 및 $Zn^{2+}$을 첨가한 군이 귀전우 추출물을 첨가하지 않은 군보다 항산화 효과가 아주 우수한 것으로 나타나 금속이온 봉쇄력이 강한 것으로 나타났다. 결론 : 귀전우 열수 추출물은 $A{\beta}$ 의한 세포파괴를 감소시키는 활성을 가지며 예방 및 보호효과를 나타내었고, hepatocyte에 대한 보호효과와 세포막지질 과산화의 저해 및 $A{\beta}$처리와 같은 독성에 대한 적응능력 향상을 통한 세포보호효과를 주는 것으로 간세포 보호 등의 임상적 응용에 그 효과가 기대된다.

Keywords

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