当归多糖对大鼠肝性脑病的预防作用

目的观察当归多糖（Angelica sinensis polysaccharides,ASP）对四氯化碳性肝硬化大鼠肝性脑病发生的预防作用,并探讨其机制。方法400ml/L四氯化碳皮下注射造模,分别给予蒸馏水（阴性组）,乳果糖（50g∶100ml,阳性药物组）,ASP10、20、40g/L溶液10ml.kg-1.d-1灌胃,连续14d后用内毒素（3mg/kg）诱导大鼠昏迷,观察注射内毒素后12h内各组大鼠昏迷发生时间和数量,测定各组大鼠的血氨、血清谷丙转氨酶（GPT）、谷草转氨酶（GOT）浓度,观察脑细胞凋亡情况和星形胶质细胞数量。结果各组大鼠血氨、GPT、GOT水平,脑细胞凋亡数和昏迷率,阴性组最高;ASP40g/L组的血氨、GOT水平和昏迷率均低于阳性药物组,ASP3个剂量组的脑细胞凋亡数均低于阳性药物组,而星形胶质细胞数阴性组最低,且ASP3个剂量组均高于阳性药物组。结论ASP可保护脑功能,减缓肝性脑病的发生,作用优于阳性药物乳果糖。其机制可能与降低血氨,改善肝功能,保存星形胶质细胞和神经元的活性有关。

Angelica sinensis polysaccharides prevents rat from hepatic encephalopathy

Objective To investigate to the role of Angelica sinensis polysaccharides (ASP) against hepatic encephalopathy and explore the probable mechanism. Methods Sprague-Dawley rats were established into carbon tetrachloride (CCl4)-induced liver cirrhosis,then treated with distilled water (negative control),lactulose (positive control),ASP solution (10,20 and 40 g/L respectively,intragastrically at dose of 10 ml.kg-1.d-1) for 14 days. On 15th day,all the survival rats were intraperitoneally injected with endotoxin...