电针对阿尔茨海默病模型大鼠学习记忆能力及海马区胶质细胞的影响

目的:探讨电针对阿尔茨海默病大鼠学习记忆影响的机制.方法:将SD大鼠随机分成正常组、假手术组、模型组和电针组,每组12只.Meynert核注射微量B淀粉样蛋白1-40制备动物模型,电针组选取"百会""太溪""足三里"电针治疗,以Morris水迷宫评价大鼠学习记忆能力,免疫组化法观察海马区胶质细胞活性.结果:与正常组比,模型组海马区胶质细胞活化,数量增多,学习记忆能力减退(P＜0.01).治疗后,电针组胶质细胞数量较模型组减少,学习记忆能力增强(P＜0.01).结论:电针治疗可减少胶质细胞的活化,从而对神经元发挥保护作用,增强学习记忆能力.

Effects of electroacupuncture on learning and memory ability and glial cells of the hippocampus in the rat of Alzheimer disease

Objective To study on the mechanism of electroacupuncture for treatment of Alzheimer disease (AD). Methods SD rats were randomly divided into a normal group, a sham operation group, a model group and an electroacupuncture group, 12 rats in each group. The AD rat model was prepared by microinjection of amyloid-beta protein (Aβl-40) into the Meynert nucleus. In the electroacupuncture group, electroacupuncture was given at "Baihui" (GV 20), "Taixi" (KI 3), "Zusanli" (ST 36). The learning and memory ability was assessed by Morris water maze and the glial cell activity in the hippocampus was determined by immunohistochemistry. Results Compared with the normal group, the glial cell in the hippocampus was activated with increase of the number, and the learning and memory ability reduced in the model group (P<0. 01). After treatment, as compared with the model group, the number of the activated glial cells was reduced and the learning and memory ability was improved in the electroacupuncture group (P<0. 01). Conclusion Electroacupuncture treatment can decrease the number of activated glial cells so as to protect the neurons, improving the learning and memory ability in the AD rat.