阿斯匹林对Alzheimer病大鼠学习记忆影响及其分子机制

目的　观察阿斯匹林 (aspirin ,As)对喹啉酸损伤海马所致痴呆大鼠学习记忆影响及其分子机制。方法　用立体定位技术对海马CA1区微量注射喹啉酸 (quinolinicacid ,QA)造成Alzheimer病 (AD)大鼠模型 ;Y形迷宫检测大鼠学习记忆能力 ;电子显微镜、流式细胞仪检测海马细胞凋亡 ;原子吸收分光光度计检测海马组织钙离子浓度。结果　阿斯匹林可明显提高喹啉酸所致痴呆大鼠学习记忆水平 ;显著降低其海马细胞凋亡率 ;减少海马组织钙离子浓度。结论　阿斯匹林对AD大鼠的保护作用与钙拮抗、抑制QA诱导海马细胞凋亡有关。

Effect of aspirin on learning and memory in Alzheimers disease rats and its molecular mechanism

AIM To observe the effect of aspirin on a model of Alzheimers disease in rats and its molecular mechanism. METHODS The AD pathological model was made by hippocampal CA 1 lesions with stereotaxic mini-injection of quinolinic acid;the rats learning and memory was observed by Y-maze; the apoptosis of hippocampal cells were detected by using flow cytometry and electronic microscope; the content of calcium in AD rats hippocampus was determined by atomic absortion spectrophotometer. RESULTS Aspirin was shown to improve learning and memory deficiency in rats with bilateral hippocampal lesions induced by quinolinc acid, to decrease apoptosis rate in hippocampal cells significantly and to reduce the concentration of calcium in hippocampus. CONCLUSION The protective effects of aspirin on a model of AD in rats may be involved in antagonism of calcium and inhibition of apoptosis in hippocampal cells induced by quinolinic acid.