Comparison of the immunoreactivities of NMDA receptors between the young and adult hippocampal CA1 region induced by experimentally transient cerebral ischemia

被引:6
作者
Seo, Jeong Yeol [1 ]
Yan, Bing Chun [2 ]
Park, Joon Ha [2 ]
Ahn, Ji Hyeon [3 ]
Kim, In Hye [2 ]
Lee, Jae-Chul [2 ]
Kwon, Young-Geun [4 ]
Kim, Young-Myeong [5 ,6 ]
Cho, Jun Hwi [7 ,8 ]
Won, Moo-Ho [2 ,8 ]
机构
[1] Hallym Univ, Chuncheon Sacred Heart Hosp, Coll Med, Dept Emergency Med, Chunchon 200702, South Korea
[2] Kangwon Natl Univ, Sch Med, Dept Neurobiol, Chunchon 200701, South Korea
[3] Daegu Univ, Coll Rehabil Sci, Dept Phys Therapy, Neurosci Lab, Gyongsan 712714, South Korea
[4] Yonsei Univ, Coll Life Sci & Biotechnol, Dept Biochem, Seoul 120749, South Korea
[5] Kangwon Natl Univ, Sch Med, Vasc Syst Res Ctr, Chunchon 200701, South Korea
[6] Kangwon Natl Univ, Sch Med, Dept Mol & Cellular Biochem, Chunchon 200701, South Korea
[7] Kangwon Natl Univ, Kangwon Natl Univ Hosp, Sch Med, Dept Emergency Med, Chunchon 200701, South Korea
[8] Kangwon Natl Univ, Kangwon Natl Univ Hosp, Sch Med, Inst Med Sci, Chunchon 200701, South Korea
基金
新加坡国家研究基金会;
关键词
Young animal; Ischemia-reperfusion; Pyramidal cells; Delayed neuronal death; Excitotoxicity; Gerbil; DELAYED NEURONAL DEATH; CELL-DEATH; GERBIL HIPPOCAMPUS; BRAIN ISCHEMIA; MOLECULAR-MECHANISMS; IN-VITRO; CALCIUM; EXCITOTOXICITY; GLUTAMATE; MICRODIALYSIS;
D O I
10.1016/j.jns.2012.12.012
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Young gerbils are much more resistant to transient cerebral ischemia than the adult. In the present study, we observed that about 90% of CA1 pyramidal cells in the adult hippocampus died 4 days post-ischemia; however, about 56% of them in the young hippocampus died at 7 days post-ischemia. To compare excitotoxicity between them, we carried out immunoreactivities of NMDA receptor 1 (NMDAR1) and NMDAR2A/B in the hippocampal CA1 region (CM) induced by 5 min of transient cerebral ischemia in the young and adult gerbils. Their immunoreactivities and protein levels in the young sham-group were much lower than those in the adult sham-group. Four days after ischemia-reperfusion, they were significantly decreased in the adult ischemia-group; however, in the young ischemia-group, they were much higher than those in the adult. Seven days after ischemia-reperfusion, NMDAR1 immunoreactivity and its level in the young were much higher than those in the adult; NMDAR2A/B immunoreactivity and its level in the young were lower than in the adult. In brief, the immunoreactivities of NMDARs were not decreased in the ischemic CM region of the young 4 days after transient cerebral ischemia. This finding indicates that longer maintenance of NMDARs may contribute to less and more delayed neuronal death/damage in the young CA1. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:108 / 114
页数:7
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