川芎嗪对三氯化铝致阿尔茨海默病模型小鼠学习记忆能力的影响

目的 观察川芎嗪(TMP)对阿尔茨海默病(AD)模型小鼠学习记忆能力的改善作用及其机制.方法 采用AlCl3灌胃方法建立AD模型小鼠,灌胃给予TMP(200 mg·kg-1)观察疗效,榆测各组小鼠的逃避潜伏期、腩组织AChE、SOD活性、MDA含量及大脑皮层AB、NF-κB表达的变化.结果 1)TMP可使A1C13诱导的AD模型鼠的逃避潜伏期显著缩短(P＜0.05);2)TMP可使AlCl3诱导的AD模型鼠脑组织中AChE活性降低19%(1.37±0.13)U·mgpro-1,(1.69 4-0.27)U·mgpro-1,P=0.016];使SOD活性提高39%(55.81±10.25)U·mgprot-1,(40.04±13.06)U·mgprot-1,P=0.026];使MDA含量降低34%(43.63±13.27)nmol·mgprot-1,(28.59±8.52)nmol·mgprot-1,P=0.023];3)TMP可明显降低AD模型鼠腩组织中AB、NF-κB的表达(P＜0.05).结论 TMP可改善化学诱导的AD模型小鼠学习记忆能力障碍,可能机制与提高SOD活件、降低MDA含量、降低AChE活性、降低脑绀织中AB、NF-κB的表达等相关.

Effects of tetramethylpyrazine on learning and memory in aluminium trichloride induced Alzheimer's disease mice

Objective To discuss the effects and mechanisms of tetramethylpyrazine(TMP)on learning and memory abilities of Alzheimer's disease(AD)mice.Methods The animal models of AD were induced by aluminium trichloride(AlCl3)intragasticly for forty days.Then,TMP was intragastricly administered for twenty days.The escape latency of the mice in water maze test was recorded;and AChE and SOD activities and MDA levels in the brain were detected by chemical eoiorimetrie method.The expressions of At3 and NF-κB in the cerebral cortex were measured by immunohistochemistry method.Results 1)TMP has markedly decreased escape latency in AlCl3 induced AD mice(P＜0.05).2)In the brain of AlCl3 induced AD mice,TMP reduced AChE activity 19%(1.37±0.13)U·mgpro-1vs(1.69±0.27)U·mgprot-1,P=0.016],decreased MDA levels 34% (43.63 4-13.27)nmol·mgprot-1 vs(28.59±8.52)nmol·mgprot-1,P=0.023]and increased SODD activity 39%(55.81±10.25)U·mgprot-1 vs(40.04±13.06)U·mgprot-1,P=0.026],respectively.These resuits showed significant difference with model mice group(P＜0.05).3)TMP also decreased AB and NF-κB expressions in the cerebral cortex of AD mice models(P＜0.05).Conclusion In AlCl3 induced AD mice,TMP can remarkably enhance the learning and memory abilities,presumably in relation to raise the activity of SOD,reduce the activity of AChE,the levels of MDA and the expressions of AB and NF-κB in the brain.