白术糖复合物AMP-B的理化性质及降血糖活性的研究

Studies on Physico-chemical properties and hypoglycemic activity of complex polysaccharide AMP-B from Atractylodes macrocephala Koidz

目的 研究白术糖复合物AMP B的理化性质及其对正常和糖尿病大鼠降血糖的作用。方法 用水浸、醇沉、膜分离和冷冻干燥得到粗多糖 ,再经柱色谱得白术糖复合物AMP B。建立大鼠四氧嘧啶糖尿病模型 ,分 3个剂量组给药 ,测定血糖值、饮水量和耗食量 ,及胸腺指数、胰腺指数。结果 AMP B是一种糖复合物 ,各元素质量分数为 :C 32 84% ,H 5 68% ,N 1 79%。碳水化合物 50 3 % ,糖醛酸 40 4% ,蛋白质 1 1 5 %。气相色谱分析表明AMP B由葡萄糖、半乳糖、甘露糖、阿拉伯糖和鼠李糖组成 ,摩尔比 3 0∶2 5∶1 3∶3 5∶1 0。AMP B 50 ,1 0 0和 2 0 0mg·kg-1 ig能显著降低四氧嘧啶糖尿病大鼠血糖水平 ,与模型组比较P <0 0 1 ,对正常大鼠血糖无影响。AMP B能减少糖尿病大鼠的饮水量和耗食量 ,对四氧嘧啶引起的大鼠胰岛损伤有一定的恢复作用 ,抵抗四氧嘧啶引起的大鼠胸腺、胰腺萎缩。结论 AMP

Aim To isolate a complex polysaccharide (AMP-B) from Atractylodes macrocephala Koidz and study its phtsico-chemical properties and hypoglycemic activity. Methods The root of Atractylodes macrocephala K. was extracted with water and precipitated with ethanol, dialyzed against water and freeze-dried to get the crude polysaccharides (AMP). A complex polysaccharide (AMP-B) was isolated and purified on DEAE-cellulose column. The model of diabetes rats was established with alloxan injection through the tail vei...