首都医科大学学报 ›› 2001, Vol. 22 ›› Issue (3): 209-212.

• 论著 • 上一篇    下一篇

TRH类似物YM14673对缺血神经元c-fos表达的影响

翟晶, 张家瑾, 张辉   

  1. 北京市神经外科研究所生化室
  • 收稿日期:2000-06-07 修回日期:1900-01-01 出版日期:2001-07-15 发布日期:2001-07-15

Effect of Thyrotropin-releasing Hormone Analogue, YM14673, on c-fos Protein Expression in Ischemic Neuron

Zhai Jing, Zhang Jiajin, Zhang Hui   

  1. Department of Neurobiochemistry, Beijing Neurosurgical Institute
  • Received:2000-06-07 Revised:1900-01-01 Online:2001-07-15 Published:2001-07-15

摘要: 为探讨促甲状腺素释放激素(TRH)类似物YM14673(YM)对脑缺血损伤保护作用的机制,用无损伤小动脉瘤夹夹闭Wistar大鼠大脑中动脉(MCA)和双侧颈总动脉(CCAs)1h,造成脑缺血再循环模型.大鼠脑冠状切片(10μm)分别进行苏木素伊红(HE)染色和免疫组化染色.结果:缺血1h再灌24h给药组(术前30min,ip,YM1mg/kg)与缺血组比较大脑皮质神经元降解相对减少.缺血1h再灌4h,缺血组海马结构齿状回及CA4区有强的c-fos蛋白样免疫反应(CFPLI),而给药组在上述区域CFPLI相对较低.表明YM对缺血神经元c-fos的表达有一定的抑制作用.

关键词: 脑缺血, TRH类似物, YM14673, 蛋白表达, c-fos

Abstract: To study the effect of thyrotropin releasing hormone analogue, YM14673, on c fos protein expression in rat hippocampus following cerebral ischemia, cerebral ischemia was produced by occlusion of middle cerebral artery(MCA)and bilateral common carotid arteries(CCAs)with small aneurysmal clips for 1 h in wistar rats. Cerebral coronal section(10 μm)was routinely stained with hematoxylin eosin(HE)and immunohistochemical stained with standard streptavidin biotin AP technique . YM14673(1 mg/kg, ip, 30 min prior to occlusion)decreased the degeneration of neurons in the cerebral cortex at 1 h of MCA/CCAs occlusion with 24 h of reperfusion. Most of the pyramidal cells in CA4, and dentate granule cells showed intense c fos protein like immunoreactivity(CFPLI)at 1 h of MCA/CCAs occlusion with 4 h of reperfusion. YM14673 attenuated the c fos protein induction in CA4 regions and dentate gyrus at 1 h of MCA/CCAs occlusion with 4 h of reperfusion. The results show that YM14673 has certain inhibiting function on the expression of c fos in the hippocampal regions post-is-chemia.

Key words: cerebral ischemia, TRH analogue, YM14673, protein expression, c-fos

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