Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Protective Mechanism of Flavonoids Isolated from Rhus verniciflua on the Biliary Liver Fibrosis in Rat

간섬유화 동물에서 옻나무 목부로부터 분리한 flavonoids의 독성 경감기전

  • Published : 2002.06.01
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Abstract

The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species and free radical reactions. In this study, we investigated whether flavonoids (fustin, sulfuretin) which were isolated from Rhus verniciflua Stokes (RCS) have antioxidant and antihepatotoxicity effect under the biliary liver fibrosis condition. After surgery (control) and posttreated RCS methanol extract (250mg/kg), ethyl acetate extract (250mg/kg) and flavonoids were administered p.o. 10mg/kg/day in two weeks for control groups. The concentration of clinical parameters and product of hepatic lipid peroxidation and the hydroxyproline content were significantly increased in liver fibrosis developed rats. Among the clinical parameters of serum, value of ALT, AST, SDH, total bilirubin and ${\gamma}$ -GT in posttreated RCS components-group showed significantly lower than in control-group. The content of hydroxyproline in posttreated RCS components-group showed lower than in control group and then the value of MDA in posttreated RCS components-group was also significantly reduced to 40~60% of that in control group. The hepatic xanthine oxidase and aldehyde oxidate activities were posttreated RCS components-group showed significantly lower than in control-group. The hepatic SOD and glutathione peroxidase activities were posttreated RCS components-group showed significantly higher than in control-group. Hence we concluded that active components of fustin and sulfuretin which were isolated from R. verniciflua Stokes were hepatoprotective effect in experimental liver fibrosis.

옻나무(Rhus verniciflua Stokes)로부터 간섬유화에 따른 간독성의 경감기전을 추구할 목적으로 ethyl acetate 분획에서 분리한 fustin 및 sulfuretin을 실험동물에 투여하고서 혈액학적 변화 및 간장 중 활성산소에 미치는 영향 검토한 결과 담도결찰하여 간섬유화를 유도한 군에서는 AST, ALT, SDH, ${\gamma}$-GT활성 및 total bilirubin의 양이 현저히 증가되던 것이 옻나무의 메탄을 엑스(250 mg/kg), 에틸아세테이트 엑스(250 mg/kg), fustin(10 mg/kg) 및 sulfuretin(10 mg/kg)을 2주간 각각 경구투여 하므로서 유의성 있게 억제되었다. Hydroxyproline양 및 MDA 농도에서도 간섬유화를 유도하므로서 현저히 증가되던 것이 옻나무의 분획 및 sulfuretin과 fustin의 투여로서 각각 약 60% 및 47%정도 감소되었다. 간섬유화를 유도한 cytosolic계 효소인 xanthine oxidase 및 aldehyde oxidase의 활성이 현저히 증가되었으며 한편 superoxide dismutase, glutathione peroxidase 및 catalase은 간섬유화의 유도로 감소되었으나 옻나무의 분획(메탄올, 에틸아세테이트) 및 성분(fustin, sulfuretin)의 투여로서 조절되었다.

Keywords

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