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

Jeong Yeol Seo, Bing Chun Yan, Joon Ha Park, Ji Hyeon Ahn, In Hye Kim, Jae Chul Lee, Young Geun Kwon, Young Myeong Kim, Jun Hwi Cho, Moo Ho Won

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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 (CA1) 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 CA1 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.

Original languageEnglish
Pages (from-to)108-114
Number of pages7
JournalJournal of the Neurological Sciences
Issue number1-2
Publication statusPublished - 2013 Feb 15


All Science Journal Classification (ASJC) codes

  • Neurology
  • Clinical Neurology

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