大豆提取物对去卵巢大鼠能量平衡的作用

Effects of Soy Extract on Energy Balance in Ovariectomized Rats

目的 :确定大豆提取物及其有效成分对去卵巢大鼠能量代谢的药理作用。方法 :Wistar大鼠 90只 ,随机分成正常组、假手术组、模型组、雌激素组、高剂量大豆黄酮组、低剂量大豆黄酮组、高剂量大豆提取物组、低剂量大豆提取物组、大豆多糖组 ,每组 10只。除假手术组与正常组外 ,其余各组均切除双侧卵巢。术后 1周开始每周测量 1次体重、日进食量。 6周后处死动物 ,计算饲料转化率 ,测量身长 ,计算体重系数 ,分离腹部脂肪并称重。结果 :切除卵巢后动物进食量、体重与体重系数增加、饲料转化率加大 ,腹部脂肪堆积。雌激素组 ,大豆提取物组及大豆黄酮组均不同程度减弱去卵巢引起的能量代谢改变 ,但大豆多糖无作用。结论 :去卵巢大鼠可作为更年期妇女肥胖的动物模型 ,大豆提取物有减弱去卵巢引起的病理改变 ,其有效成分为黄酮类化合物。

Objective:In order to study on effects of soy extract on energy metabolims in ovariectomized rats. Method:90 Wistar rats were randomly divided into 9 groups:control group, sham group, model group, estrogen group, soy isoflavone group of high dose, soy isoflavone of low dose, soy extract of high dose,soy extract of low dose, 10 rats each group. Beside of control and sham groups, the rest rats were ovariectomized. One week after operation, the rats were treatmented with different drugs, measument of body weigh and feed weigh each week. Six week after operation, the rats were killed, serum were taken, abdomen lipid were removed and weight. Result: The ovariectomized rats took more food and got weight gain significantly; Body mess index(BMI), Abdomen lipid weigh and food transform rate in Model group increased significantly than control and sham groups. Administration of estrogen or soy extract or soy isoflavone could block these changes in ovariectomized rats, but soy polysaccharides did not have the effects. Conclusion: Ovariectomized rats have imbalance of energy metabolism, weigh gain and accumulation of abdomen lipid; administration of estrogen ,soy extracts or soy isoflavone could attenuate these changes induced by ovariectomizing.