盐酸川芎嗪通过干预GABAR和FOXP2的表达保护低压低氧大鼠学习记忆

摘要

目的 探讨盐酸川芎嗪对低压低氧大鼠学习记忆功能的影响及其作用机制.方法 将120只SD大鼠随机分为2组,低氧对照组(5 500 m)、低氧药物组(5 500 m),按时间段不同又分为1 d、3 d、7 d、15 d、30 d组,每组12只;对照组和药物组在模拟海拔5500 m的低压氧仓造模,对照组腹腔注射生理盐水,药物组用同样的方法注射盐酸川芎嗪进行干预.用Morris水迷宫实验检测大鼠行为学变化;Western blot检测大鼠海马GABAAα1R、GABAB1R、FOXP2表达情况.结果 ① 通过计算对照组和药物组定位航行实验中的总路程和穿越平台次数可以得出,两组1 d结果差异无统计学意义(P>0.05),从3 d组开始,药物组总路程较对照组逐渐缩短(P0.05);GABAB1R受体和FOXP2蛋白,1 d对照组药物组表达没有差异,从3 d组开始,对照组该受体和蛋白表达量均低于药物组(P0.05);however,GABAB1 receptor and FOXP2 protein rose from the third day(P<0.05).The expression of GABAAα1 receptor and FOXP2 protein expression were correlated to total distance of Morris water maze in the control group(r=-0.738, P<0.05;r=-0.693, P<0.05), and the expression of GABAB1 receptor was correlated with FOXP2 protein level(r=0.834, P<0.05).Conclusion The simulated high-altitude hypobaric hypoxia can decrease the learning and memory abilities of rats, which may be ameliorated by tetramethylpyrazine intervention, and this effect might be related to the increase of GABAB1R receptor and FOXP2 expression in hippocampus of rats.