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Effects of Ethanol Extracts from Petasites japonicus S. et Z. Max. on Hepatic Antioxidative Systems in Alcohol Treated Rats

머위 추출물이 알코올 투여한 흰쥐의 간조직 내 항산화 체계에 미치는 영향

  • Published : 2007.03.31

Abstract

This study investigated the hepatoprotective effects of an ethanol extract of Petasites japonicus S. et. Z. Max. (PJ) on alcohol-induced liver-damaged rats. Sprague-Dawley rats weighing $100{\sim}150\;g$ were divided into 5 groups; normal diet group (NOR), alcohol (35%, 10 mL/kg/day) treated group (CON), PJ 200 mg/kg/day treated group (PJ1), PJ 200 mg/kg/day and alcohol treated group (PJ2), and PJ 400 mg/kg/day and alcohol treated group (PJ3). The growth rate of the control group was higher than that of normal group, whereas the group administered PJ concomitantly was significantly increased. Also, feed efficiency ratio decreased by alcohol administration was gradually increased to the adjacent level of the normal group by administering PJ. The AST activity in serum elevated by alcohol was significantly decreased by administering the high dosage of PJ, but exerted no significant change on serum ALT activity. It was also observed that the hepatic activities of catalase and GSH-Px increased by alcohol were markedly decreased in PJ2 and PJ3, but not in the activities of XO and SOD as compared with the control group. The depleted content of GSH by alcohol was increased to the level of normal group by administering PJ in a dose-dependant manner. In conclusion, these results suggest that PJ may have a possible protective effect on liver function in hepatotoxicity-induced rat by alcohol administration.

머위 에탄올 추출물이 알코올 투여로 유발된 간손상에 미치는 영향을 알아보기 위하여 흰쥐에게 정상식이군(NOR), 알코올 투여군(35% alcohol 10 mL/kg bw, CON), 머위 에탄올 추출물 투여군(PJ1), 알코올과 머위 에탄올 추출물 저용량(200 mg/kg bw) 병합투여군(PJ2) 및 알코올과 머위 에탄올 추출물 고용량(400 mg/kg bw) 병합투여군(PJ2)의 5군으로 나누어 6주간 사육하였다. 체중증가율 및 식이효율, 혈청 중 ALT와 AST 활성, 간손상 억제효과를 확인하기 위하여 항산화효소인 SOD, catalase, XO 및 GSH-Px 활성을 측정하였고, 지질과산화물과 GSH 함량을 측정하였다. 항산화 지표를 측정한 결과 정상식이만을 급여한 NOR군과 정상식이에 머위 에탄올 추출물을 투여한 PJ1군 간에는 유의차가 없었으나, 알코올을 투여한 군(CON, PJ2 및 PJ3)들 간에는 유의차를 보였으며 특히, 고용량 병합투여 시 항산화효과가 높게 나타났다. 머위 에탄올 추출물 병합투여는 만성 알코올 투여로 감소되어진 체중을 정상 체중으로 회복시켰으며, 알코올 투여로 증가된 유리기 해독계 효소인 catalase 및 GSH-Px 활성 억제와 비효소적 항산화작용을 나타내는 GSH 함량을 증가시킴으로써 지질과산화물에 대한 방어력이 증강됨을 보였고, 또한 혈청 중 AST 활성을 유의하게 감소시킴으로써 알코올 섭취로 유도된 지방간 및 손상된 간조직을 보호하는 항산화효과가 있는 것으로 추정된다.

Keywords

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