• Advances in Traditional Medicine
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• 제7권3호
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• pp.311-320
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• 2007

The present study was designed to estimate the protective effect of (-) epigallocatechin gallate (EGCG) on ethanol-induced liver injury in rats. Chronic ethanol administration (6 g/kg/day ${\times}$ 60 days) caused liver damage that was manifested by the elevation of markers of liver dysfunction - aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, lactate dehydrogenase, bilirubin and ${\gamma}$-glutamyl transferase in plasma and reduction in liver glycogen. The activities of alcohol metabolizing enzymes such as alcohol dehydrogenase and aldehyde dehydrogenase were found to be altered in alcohol-treated group. Ethanol administration resulted in the induction of cytochrome p450 and cytochrome-$b_{5}$ activities and reduction of cytochrome-c reductase and glutathione-S-transferase, a phase II drug metabolizing enzyme. Further, ethanol reduced the viability of isolated hepatocytes (ex vivo) as assessed by trypan blue exclusion test and induced hepatocyte apoptosis as assessed by propidium iodide staining. Treatment of alcoholic rats with EGCG restored the levels of markers of liver injury and mitigated the alterations in alcohol metabolizing and drug metabolizing enzymes and cyt-c-reductase. Increased hepatocyte viability and reduced apoptotic nuclei were observed in alcohol + EGCG-treated rats. These findings suggest that EGCG acts as a hepatoprotective agent against alcoholic liver injury.

• 고려인삼학회:학술대회논문집
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• 고려인삼학회 1984년도 학술대회지
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• pp.21-26
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• 1984

생체에 투입되는 이물질(xenobiotics)들이 돌연변이를 일으키고 나아가서는 암을 유발시키게 되는 것은 이물질들이 생체내에서 어떤 양상으로 대사되느냐, 즉 이물질이 독성화되는 과정과 해독되는 과정에 있어서의 활성도의 차이에 따라 좌우되는 것으로 알려져 있다. 따라서 인삼이 이물질 대사 및 해독작용에 어떤영향을 미치는가를 밝혀보기 위하여 동물 실험을 통하여 발암물질로 알려진 Benzopyrene과 그 외 다른 유독한 화학약물들의 대사과정에 미치는 영향을 조사하여 보았다. 인삼투여군에 있어서 cyt. P-450와 관련된 Monooxy-genase system이 선택적으로 유도되었고 또 해독작용에 필수적인 Conjugation도 현저히 상승되었다. 이와 같은 이물질 해독작용의 선택적 유도는 인삼이 이물질 대사과정에 영향을 미쳐 독성물질 해독 항진효능이 있음을 제시해 주는 것으로 해석되어진다.