大麻素CB2受体参与电针预处理诱导的延迟相脑保护作用

被引:6
作者
马磊
侯丽宏
赵昱
王强
朱萧玲
朱正华
赵宁侠
贾济
陈绍洋
机构
[1] 第四军医大学西京医院麻醉科
关键词
CB2受体; 脑缺血; 电针; 预处理;
D O I
暂无
中图分类号
R245 [针灸学、针灸疗法];
学科分类号
100512 ;
摘要
目的探讨大麻素CB2受体在电针预处理诱导的脑缺血耐受中的作用。方法实验1:成年雄性SD大鼠40只按随机数字表法分为5组:大脑中动脉闭塞(MCAO)组、电针(EA)+MCAO组、CB2受体拮抗剂(AM630)+EA+MCAO组、AM630的溶剂(V)+EA+MCAO组和AM630+MCAO组(n=8),线拴法制作MCAO模型,EA预处理在模型前2 h给予,AM630或其溶剂在模型前5.5 h给予,于模型后72h行神经功能评分和2,3,5-氯化三苯基四氮唑(TTC)染色检测脑梗死容积百分比的变化;实验2:成年雄性SD大鼠40只分组和处理同上,EA预处理在模型前24 h给予,AM630或其溶剂在模型前27.5 h给予,检测指标的时间和方法同实验1;实验3:成年雄性SD大鼠36只按照随机数字表法分为6组:对照组和EA后2、6、12、18、24 h组(n=6)。后5组给予EA处理后在不同时间点应用RT-PCR和Western Blot检测各组大鼠右侧大脑中CB2受体的表达。结果实验1:与MCAO组和AM630+MCAO组比较,EA+MCAO组、AM630+EA+MCAO组、V+EA+MCAO组大鼠神经功能评分增高,脑梗死容积百分比降低,差异有统计学意义(P<0.05);实验2:与MCAO组比较,EA+MCAO组和V+EA+MCAO组大鼠神经功能评分增高,脑梗死容积百分比降低,与EA+MCAO组比较,AM630+EA+MCAO组和AM630+MCAO组大鼠神经功能评分降低,脑梗死容积百分比增高,差异均有统计学意义(P<0.05);实验3:与对照组比较,EA后18 h组CB2受体mRNA水平增高,EA后24 h组CB2受体蛋白增高,差异有统计学意义(P<0.05)。结论 CB2受体参与了电针预处理诱导的延迟相脑保护作用。
引用
收藏
页码:325 / 329
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