2型糖尿病致阿尔茨海默病损伤大鼠模型的建立及鉴定

Establishment and identification of type 2 diabetes mellitus-induced Alzheimer's disease rat model

目的建立2型糖尿病(type 2diabetes mellitus,T2DM)致阿尔茨海默病(Alzheimers disease,AD)损伤大鼠模型。方法高脂高糖饮食持续喂养老年大鼠,建立T2DM大鼠模型,继而运用Morris水迷宫试验、脑脊液微透析及ELISA技术、电生理学检查方法筛选出继发AD损伤大鼠并病理鉴定。结果与单纯T2DM组及普通饮食组比较,T2DM+AD组大鼠存在明显的学习、记忆功能障碍;T2DM+AD组大鼠海马区域脑脊液中β淀粉样蛋白(β-AP)水平显著升高;且该组大鼠海马神经元灌流乙酰胆碱(Ach)所引发的动作电位频率显著降低。结论持续高脂高糖饮食喂养可成功建立2型糖尿病致阿尔茨海默病损伤大鼠模型。

Objective To establish the rat model of type 2 diabetes mellitus （T2DM）-induced Alzheimer’s disease （AD）.Methods The rat model of T2DM was established by continuous high fat and high glucose diet in aged rats. Then the rat model was screened and identified by using Morris water maze, cerebrospinal fluid microdialysis technique,ELISA,electrophysiological technique and pathologic method,respectively.Results Compared with the normal group and the T2DM group,the rats in T2DM＋DM group had obviously learning and memory impairment;the level ofβ-AP in the hippocampus was significantly higher and the frequency of the spikes induced by Achin the hippocampus was notably lower.Conclusion The rat model of T2DM-induced AD can be successfully established by continuous high fat and high glucose diet in rats.