脑灵汤对阿尔茨海默病大鼠模型行为学及海马CA3区小胶质细胞和IL-6表达的影响(英文)  

Effect of Naoling decoction on the expression of microglia and IL-6 in hippocampal CA3 region of rats with synthetic Alzheimer’s disease

作　　者：王哲[1] 伍明辉[1] 钟炳武[1] 张东东[1] 何明大[1] 

机构地区：[1]中南大学湘雅二医院中医科,长沙410011

出　　处：《中南大学学报（医学版）》2013年第2期114-119,共6页Journal of Central South University ：Medical Science

基　　金：supported by the Project of Health Department of Human Province(201225);the Project of Hall of Hunan Province Science and Technology,P.R.China(2012SK3212)

摘　　要：目的:探讨脑灵汤对阿尔茨海默病(AD)模型大鼠CA3区小胶质细胞和IL-6表达的影响,初步揭示脑灵汤治疗AD的机制。方法:选用纯系SD大鼠(雌雄各半)30只随机分为5组,每组6只,分别为正常组、假手术组、模型组、西药(脑复康)组、中药(脑灵汤)组。采用Aβ1-42双侧海马注射建立AD模型,造模后喂养28天,采用Y-水迷宫和Morris水迷宫进行行为学检测,免疫组织化学法检测小胶质细胞特异性标记物OX-42和IL-6在大鼠海马CA3区组织神经元中的表达。结果:Morris水迷宫实验显示:与正常组比较,模型组隐匿平台搜索实验中逃避潜伏期延长(P<0.05),探索实验中平均穿越次数减少(P<0.05);Y-迷宫实验显示:模型组躲避电刺激所需的次数增加(P<0.05),脑灵汤可以明显改善模型鼠上述指标(P<0.05);免疫组织化学结果显示:与模型组相比,脑灵汤组大鼠海马CA3区的OX-42和IL-6表达明显下降(P<0.05)。结论:脑灵汤能明显改善AD模型大鼠学习记忆能力,抑制模型大鼠CA3区小胶质细胞活性,减少IL-6的表达,这可能是脑灵汤治疗AD的部分机制。Objective: To observe the effect of Naoling decoction on the learning and memory behaviors and the expression of microglia and IL-6 in hippocampal CA3 region of rats with Alzheimer’s disease (AD), and to elucidate the potential mechanism. Methods: Thirty SD rats were randomly divided into 5 groups: a normal group, a sham-operation group, an AD group, a Naoling decoction group and a Naofukang group. The spatial learning and memory behaviors of the rats were investigated by water maze and Y-maze. The Alzheimer’s disease model was established by injecting Aβ 1-42 into the hippocamal of the rats. Expression of OX-42 (one of the microglia specific markers) and IL-6 in the CA3 region of hippocamal was measured by immunohistochemical stain. Results: Morris water maze experiment showed that the escape latency of hidden platform in the AD group was significantly delayed (P<0.05) and the average times of passing was decreased (P<0.05). Y-maze test showed that the times needed to the learn how to evade the electrical stimulation in the AD group was most than in other groups (P<0.05). Compared with the AD group, the Morris water maze test and Y-maze test of the Naoling decoction group were significantly different (P<0.05). The expression of OX-42 and IL-6 in the CA3 region of hippocamal in the Naoling decoction group was decreased (P<0.05). Conclusion: Naoling decoction can improve learning and memory, and weaken the expression of OX-42 and IL-6 in hippocampal CA3 of AD rats, which may partly be the therapeutic mechanism of Naoling decoction for AD.

关 键 词：阿尔茨海默病 Β淀粉样肽 脑灵汤 小胶质细胞 白介素-6 大鼠 

分 类 号：R285.5[医药卫生—中药学]