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首页> 中文期刊> 《中国药理学通报》 >淫羊藿、黄芪、葛根有效组分复方对阿尔采末病转基因动物模型的学习记忆能力及病理学影响

淫羊藿、黄芪、葛根有效组分复方对阿尔采末病转基因动物模型的学习记忆能力及病理学影响

         
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目的观察淫羊藿、黄芪、葛根有效组分复方对APPswe ／PS1ΔE9双转基因小鼠的学习记忆能力及病理学影响。方法6月龄♂ APPswe ／PS1ΔE9双转基小鼠20只，随机分为模型组和复方组。复方组灌胃给予淫羊藿、黄芪、葛根有效组分复方3个月，模型组给予等量生理盐水。6月龄♂C57BL／6J 小鼠10只为阴性对照组。灌胃结束后，采用 Mor-ris 水迷宫检测各组小鼠学习记忆能力情况，并于水迷宫后灌注处死各组小鼠，采用改良 Bielschowsky 银染法以及尼氏染色法观察小鼠大脑组织病理学变化。结果水迷宫定位航行实验结果显示，APPswe ／PS1ΔE9双转基因小鼠的逃避潜伏期与 C57对照组小鼠相比明显延长（P ＜0.05），复方组小鼠的逃避潜伏期与模型组小鼠相比明显缩短（P ＜0.05）；空间探索实验结果显示，APPswe ／PS1ΔE9双转基因小鼠与 C57对照组小鼠相比跨台次数减少（P ＜0.05），复方组小鼠跨台次数与模型组小鼠相比明显增多（P ＜0.05）。APPswe ／PS1ΔE9双转基因小鼠的游泳速度与 C57对照组小鼠相比增大（P ＜0.05），复方组小鼠的游泳速度与模型组小鼠相比差异无显著性（P ＞0.05）。改良 Bielschowsky 银染法结果显示，C57对照组小鼠大脑皮质未见明显改变，神经原纤维排列有序、稀疏。模型组小鼠大脑皮质神经原纤维增粗、肿胀，密集成宽带状，深染，神经纤维缠结明显，分布有大量老年斑，复方组小鼠大脑皮质神经纤维缠结情况减轻，可见少量老年斑。尼氏染色结果显示，C57对照组小鼠海马各区神经细胞排列整齐且密集，胞质中尼氏体丰富，大脑皮层尼氏小体呈深蓝色，细胞核淡蓝色，背景略呈浅蓝色；模型组小鼠神经元水肿，细胞数量减少，排列稀疏，细胞间隙增大，胞质内尼氏体减少，分界不清，染成淡蓝色；复方组小鼠较模型组小鼠神经元水肿减轻，细胞数量增多，排量相对整齐，分界清晰。结论APP／PS1双转基因 AD 小鼠能够较好地模拟 AD 患者的表现及病理过程，提供有效的实验动物模型。淫羊藿、黄芪、葛根有效组分复方可以有效地改善 APP／PS1双转基因 AD 模型小鼠的学习记忆能力，减轻其大脑皮质神经纤维缠结、老年斑以及神经元水肿等改变。%Aim To observe the effects of effective fraction of Epimedium,Astragalus,Radix Puerariae on behavioral and pathological changes in a transgenic mouse model of Alzheimer’s disease.Methods Six-month-old APPswe /PS1 ΔE9 transgenic mice were ran-domly divided into 2 groups:model group and effective fraction group,1 0 mice each group.The mice in the effective fraction group were treated with the effective fraction of Astragalus,Radix Puerariae,Epimedium compound for 8 weeks.The C57BL/6J mice were used as negative control group.After 8 weeks,the learning and memory function were measured by Morris water maze,the pathological changes in brain tissue were ob-served by Modified Bielschowsky staining and Nissl 's staining.Results During place navigation trial,the escape latency in the APPswe /PS1 ΔE9 double transgenic model mice was longer than those of the mice of C57 (P 0.05 ). The Modified Bielschowsky staining shows that the neuron fibers of the cerebral cortex of APPswe /PS1 ΔE9 double transgenic mice were enlarged,swelling,and dense.There were senile plaques and nerve fiber tangles in the cerebral cortex of APPswe /PS1 ΔE9 double transgenic mice.The neuron fibers of mice in the effective fraction group were relieved;there was a small amount of senile plaque.The Nissl’s staining shows that the neurons of the cerebral cortex of APPswe /PS1 ΔE9 mice were edema, the number of cells were decreased.The mice in the effective fraction group were free of the disease.Con-clusion The double transgenic APPswe /PS1 ΔE9 mice of AD can simulate the specific pathogenesis of AD, which may be the efficient experimental animal model. The effective fraction of epimedium,astragalus and ra-dix puerariae may have a neuroprotective effect against AD via improving the learning and memory ability,and reduce the cerebral cortex nerve fiber tangles,senile plaques and neurons edema changes.

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