脑缺血耐受中亲代谢型谷氨酸受体1α下调的意义

被引:7
作者
郝玉曼
罗祖明
周东
机构
[1] 四川大学华西医院神经内科
关键词
受体,亲代谢型谷氨酸盐; 脑缺血; 缺血预处理; 疾病模型,动物;
D O I
暂无
中图分类号
R741 [神经病学];
学科分类号
摘要
目的:观察局灶脑缺血预处理对亲代谢型谷氨酸受体1α(metabotropicglutamatereceptor1α,mGluR1α)表达的影响并初步探讨其在脑缺血耐受中的意义。方法:SD大鼠单纯随机分为3组,对照组给予两次假手术,其余两组分别在2h大脑中动脉阻塞(MCAO)及22h再灌注前3d给予10min的预缺血或假手术,比较各组梗死体积、脑组织病理变化及mGluR1α免疫组化染色的平均光密度(MOD)和积分光密度(IOD)。结果:预缺血组梗死体积较假手术组减小53.48%(t=8.896,P=0.0006),神经元变性、坏死亦轻于假手术组,同时伴mGluR1α表达降低(PMOD=0.00021,PIOD=0.00012)。图像分析显示3组间MOD(F=359.496,P=0.00038)及IOD(F=285.167,P=0.00036)差异有显著性意义。结论:10minMCAO可有效诱导缺血耐受,减轻二次缺血所致的神经元死亡,减少mGluR1α表达。mGluR1α表达下调可能是局灶性脑缺血耐受产生的分子机制之一。
引用
收藏
页码:3416 / 3417
页数:2
相关论文
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