Suppression of Pyk2 attenuated the increased tyrosine phosphorylation of NMDA receptor subunit 2A after brain ischemia in rat hippocampus

被引：11

作者：

Liu, Y

Zhang, GY ^{[1
]}

Yan, JZ

Xu, TL

机构：

[1] Univ Sci & Technol China, Sch Life Sci, Dept Neurobiol & Biophys, Hefei 230027, Peoples R China

[2] Xuzhou Med Coll, Res Ctr Biochem & Mol Biol, Xuzhou 221002, Jiangsu, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Neurosci, Shanghai 200031, Peoples R China

来源：

NEUROSCIENCE LETTERS | 2005年 / 379卷 / 01期

基金：

中国国家自然科学基金;

关键词：

brain ischemia; NMDA receptor; Pyk2; tyrosine phosphorylation; Src;

D O I：

10.1016/j.neulet.2004.12.054

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Effects of suppressing the protein expression of Pyk2 on increased tyrosine phosphorylation of N-methyl-D-aspartate (NMDA) receptor subunit 2A (NR2A) after brain ischemia in rat hippocampus were studied with immunoprecipitation and immunoblot. Transient (15 min) brain ischemia and reperfusion (I/R) was induced by four-vessel occlusion in Sprague-Dawley (SD) rats. I/R led to increases of tyrosine phosphorylation of NR2A and interaction of Pyk2 and Src kinase with NR2A after 6 h of reperfusion. The increases were attenuated by Pyk2 antisense oligonucleotides intracerebroventricularly infused every 24 h for 4 days before ischemia, but not missense oligonucleotides or vehicle. The antisense also inhibited the increased auto-phosphorylation of Pyk2 and Src kinase, while the protein expression of NR2A or Src kinase had no obvious change under the above conditions. The data suggested that Pyk2 may be involved in facilitating NR2A tyrosine phosphorylation by Src kinase after I/R. (c) 2004 Elsevier Ireland Ltd. All rights reserved.

引用

页码：55 / 58

页数：4

共 19 条

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