小鼠持续性脑缺血后NMDA受体亚单位表达的变化

被引:8
作者
朱丽君
张纬萍
魏尔清
罗建红
机构
[1] 浙江大学医学院,浙江大学医学院,浙江大学医学院,浙江大学医学院浙江杭州,浙江杭州,浙江杭州,浙江杭州
关键词
脑缺血/病理学; 受体,N-甲基-D-天冬氨酸/代谢; NMDA受体; 亚单位; 神经元损伤;
D O I
暂无
中图分类号
R743 [脑血管疾病];
学科分类号
摘要
目的 :研究小鼠持续性脑缺血后不同脑区 NMDA受体亚单位表达的变化及其与病理损伤之间的联系。方法 :采用大脑中动脉阻断法制作小鼠持续性脑缺血模型 ,取缺血后不同时间的皮层、海马、皮层下脑组织 ,用免疫印迹技术测定 NMDA受体亚单位 ζ1和 ε1及 ε2蛋白的含量。同时作冰冻切片和苏木素伊红染色 ,计算相应脑区神经元密度。结果 :NMDA受体 ζ1和 ε1及 ε2亚单位表达的改变发生于缺血后 5 h内 ,皮层下 3个亚单位表达均明显增加 ,海马则各亚单位表达变化不一。脑梗塞灶和相关脑区神经元密度显著减小均出现于缺血后 5 h,相关脑区神经元死亡严重程度依次为皮层下组织和海马 CA1区及大脑颞叶皮层 - 层。结论 :小鼠持续性脑缺血 ,缺血侧脑组织 NMDA受体亚单位 ζ1和 ε1及 ε2表达的变化发生在明显的病理损害之前 ,表达变化程度因脑区不同 ,与相关脑区神经元损害的程度相应。
引用
收藏
页码:6 / 9
页数:4
相关论文
共 12 条
[1]  
Funcitional characterization of a heterometic NMDA receptor channel expressed from cloned cDNAs. Meguro H,Mori H,Araki K,et al. Nature . 1992
[2]  
The glutamate receptor ion channels. Dingledine R,Borges K,Bowie D,et al. Pharmacology Reviews . 1999
[3]  
Alteration in NMDA receptor subunit mRNA expression in vulnerable and resisitant regions of in vitro ischemic rat hippocampal slices. Small D L,Poulter M O,Buchan A M,et al. Neuroscience Letters . 1997
[4]  
Calcium; still center-stage in hypoxic-ischemic neuronal death. Choi D W. Trends in Neurosciences . 1995
[5]  
Transient global ischemia alters NMDA receptor expression in rat hippocampus: Correlation with decreased immunoreactive protein levels of the NR2A NR2B subunits, and altered NMDA receptor functionality. Zhang L,Hsu J C,Takagi N,et al. Journal of Neurochemistry . 1997
[6]  
Characterization of NMDA receptor subunit -specific antibodies:Distribution of NR2A and NR2B receptor subunits in rat brain and ontogenic profile in the cerebellum. Wang Y,Bosy T Z,Yasuda R P,et al. Journal of Neurochemistry . 1995
[7]  
The majority of N-methy-D-Aspartate receptor complexed in adult rat cerebral cortex contain at least three different subunits(NR1 NR2A NR2B). Luo J H,Wang Y H,Yasuda R P,et al. Molecular Pharmacology . 1997
[8]  
Attenuation of focal ischemic brain injury in mice deficient in the 1(NR2A) subunit of NMDA receptor. Morikawa E,Mori H,Kiyama Y,et al. The Journal of Neuroscience . 1998
[9]  
1996, Ontogeny of NMDA R1 subunit protein expression in five regions of rat brain. Luo J H,Bosy T Z,Wang Y,et al. Brain Research Developmental Brain Research . 1996
[10]  
Antisense oligodeoxynucleotides to NMDA-R1 receptor channel protect cortical neurons from excitoxicity and reduce focal ischemic infarctions. Wahlestedt C,Golanov E,Yamamato S,et al. Nature . 1993