不同维生素E含量饲料对D-氨基半乳糖致大鼠肝坏死的影响

本文观察了饲以不同VE含量饲料对D-GAL致大鼠肝坏死模型中脂质过氧化和肝损害程度的影响。结果表明:喂养8周后,富含VE饲料组大鼠血和肝VE值显著高于正常VE含量饲料组,而血MDA值则显著降低。在中毒后各个时期富含VE饲料组血和肝VE均保持较高水平,较好地维持了GSH含量及SOD、GSH-P_X活力和HPT活动度,而MDA含量和OCT、m-AST活性则非常显著低于正常VE含量饲料组,肝脏病理改变也显著轻于后者。贫乏VE饲料组大鼠上述各项指标的改变几乎均与富含VE饲料组相反。结果提示,富含VE饲料有较好的肝脏保护作用,这种保护作用可能是通过提高体内VE水平、抑制脂质过氧化而实现的。VE贫乏使肝脏对致伤因子的敏感性显著增强。

EFFECTS OF DIFFERENT VITAMIN E CONTAINING DIETS ON LIVER NECROSIS INDUCED BY D-GALACTOSAMINE IN RATS

The effects of different vitamin E(VE) containing diets on lipid peroxi-dation and the degree of liver damage in rats were observed in the model of liver necrosis induced by galactosamine(D-GAL).The results were as follows: After 8 weeks, the basic levels of VE in plasma and liver tissue of the group fed VE-supplemented diet were significantly higher than that of the group fed normal VE diet, in the company with a significant lower basic plasma MDA level. At each time interval after D-GAL injection, the plasma and liver VE levels were found higher in the VE-supplemented group, and the content of GSH as well as the activities of SOD, GSH-Px, HPT were maintained satisfactorily while the MDA content and OCT, m-AST activities were very significantly lowered and the pathological changes of the liver were not so severe as compared with that in the normal VE diet group. It was noteworthy that the changes of almost all the parameters metioned above in the group fed VE-deficient diet went to an opposite direction to the VE-supplemented group. The results indicated that the VE-supplemented diet has a good liver protective effect, which may be established on the increased VE content and suppressed lipid peroxidation in the liver. VE-deficient diet could sharply reduce the VE content in the body and significantly intensify the susceptibility of liver to the harmful agents.