大鼠实验性高脂血症和高脂血症性脂肪肝模型研究

目的　建立高脂血症和高脂血症性脂肪肝实验动物模型。方法　采用SD大鼠 30只 ,随机分为对照组 (n =10 )和模型组 (n =2 0 )。对照组喂普通饲料 ,模型组喂普通饲料并给予脂肪乳剂灌胃 (10ml·kg-1)。动态观察一般情况和血清TG、TC、ALT、AST、MDA、SOD和肝脏TG、TC、MDA、SOD的变化 ,并行病理检查。结果　 1wk后 ,模型组血清TG和TC明显高于正常组 ,形成了高脂血症模型。 2wk后 ,随机处死模型中的 10只 ,与正常组相比 ,发现血清TG、TC、ALT和肝脏MDA均明显升高 ,而肝脏SOD则明显降低 ,病理显示有 2只轻度脂肪变性。在第 3wk处死剩余动物 ,发现肝指数、血清脂质、ALT、AST、MDA和肝脏TG、MDA与对照组相比显著升高 ,而SOD则明显降低 ;光镜下所见模型组均出现弥漫性肝细胞脂肪变性 ,并有炎症病灶。结论　通过 1wk脂肪乳剂的喂养 ,形成了高脂血症模型 ;继续给予脂肪乳剂 ,2wk后形成高脂血症性脂肪肝模型。

The experimental animal model of hyperlipidemia and hyperlipidemic fatty liver in rats

AIM To establish the hyperlipidemia and hyperlipidemic fatty liver animal model.METHODS 30 SD rats were randomized into control group (n=10)and model group(n=20).The rats of model group were fed with a standard diet and fat emulsion( 10 ml·kg -1);while the rats of control group were only fed with a standard diet.The serum TG,TC,ALT,AST,MDA,SOD and hepatic TG,TC,MDA,SOD were detected dynamically and with histologically.RESULTS The model group developed hyperlipidemia which TG and TC were elevated significantly after 1 week. 10 rats which were selected randomly in the model group were killed and the serum and liver were obtained after 2 weeks. The serum TG,TC,ALT and hepatic MDA of the model group rats were higher than the control's,while the hepatic SOD were lower. At the same time,the light degree hepatic steatosis of 2 rats were induced.The third week,both control group and model rats(n=10) were killed and the serum and the liver were obtained. Compared with the control group, the serum TG,TC,ALT,AST,MDA?SOD and hepatic TG,MDA of the model group rats were markedly higher, while the serum SOD and the hepatic SOD were significantly lower.The histopathology research showed hepatocellular macrovesicular steatosis and hepatitis in the model group. CONCLUSINOS The experimental animal model of hyperlipidemia and hyperlipidemic fatty liver in rats were successfully established for 1 week and 3 weeks fed with fat emulsion.