加兰他敏对痴呆大鼠治疗机制的探讨

目的　观察加兰他敏对痴呆模型大鼠学习记忆功能及皮层、海马胆碱能神经元的影响 ,进而探讨胆碱酯酶抑制剂改善阿尔茨海默病 (AD)患者认知功能的作用机制。方法　将 β 淀粉样蛋白 (Aβ)注入Meynert核制作大鼠痴呆模型 ,并用加兰他敏进行干预。行为学方法测定各组大鼠学习记忆功能 ,免疫组织化学方法测定各组大鼠脑组织胆碱乙酰转移酶 (ChAT)的变化。结果　加兰他敏可明显提高痴呆模型大鼠在行为学测试中的成绩 ,使皮层、海马ChAT免疫阳性神经元数目增多。结论　加兰他敏可明显改善痴呆大鼠学习记忆能力 ,提高大鼠脑内胆碱能神经元存活能力可能是其重要的作用机制之一

Effects of galantamine on function of learning and memory and cholinergic neurons in cortex and hippocampus in rat models of Alzheimer's disease

Objective To explore the effects of galantamine on function of learning and memory and cholinergic neurons in cortex and hippocampus in rat models of Alzheimer's disease (AD) so as to further investigate the mechanism of cholinesterase inhibitors in improving the cognitive ability of AD patients. Methods The AD rat models established by injecting amyloid-beta protein (Aβ 1-40) into the bilateral Meynert nucleus were intervened with galantamine, and their abilities of learning and memory were measured with a behavioral test. Meanwhile, the changes in choline acetyltransferase (ChAT) in the rats were examined with immunohistochemical technique. Results In the AD model rats administered with galantamine, the performances in the test were significantly improved and ChAT immunoreactive positive neurons were increased significantly in hippocampus and cortex fields. Conclusion Galantamine can significantly improve the function of learning and memory of the AD model rats, and enhancing the survival characteristics of cholinergic neurons may be one of the important mechanisms, indicating a new possible mechanism of cholinesterase inhibitors as a remedy for AD.