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A new strategy for spinal cord protection focusing on synaptic and extrasynaptic NMDA receptors

Research Project

Project/Area Number 16K10960
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Anesthesiology
Research InstitutionYamaguchi University

Principal Investigator

MATSUMOTO Mishiya  山口大学, 大学院医学系研究科, 教授 (60243664)

Co-Investigator(Kenkyū-buntansha) 水上 洋一  山口大学, 大学研究推進機構, 教授 (80274158)
石田 和慶  山口大学, 大学院医学系研究科, 准教授 (80314813)
若松 弘也  山口大学, 医学部附属病院, 准教授 (80379966)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords脊髄虚血 / NMDA受容体 / PSD-95 / メマンチン / 家兎 / NMDA 受容体 / PSD-95阻害薬 / ZL006 / 脊髄保護
Outline of Final Research Achievements

Recently, it has been reported that the synaptic N-methyl-D aspartate (NMDA) receptors protect the central nervous system (CNS) against ischemic injury, whereas the extrasynaptic NMDA receptors exacerbate ischemic CNS injury. In this study, we sought to determine whether inhibition of the signaling pathways through extrasynaptic NMDA receptor protects against ischemic spinal cord injury. We investigated the protective effects of memantine and postsynaptic density protein 95 inhibitors (ZL006 and TAT-NR2B9c) on neurologic and histopathologic outcomes in a transient spinal cord ischemia model of rabbits. Our results suggest that inhibition of the signaling pathways through extrasynaptic NMDA receptors does not protect against ischemic spinal cord injury.

Academic Significance and Societal Importance of the Research Achievements

胸腹部大動脈瘤手術時に起こりうる脊髄虚血による脊髄障害は患者の社会復帰に大きな影響を与える。薬物療法により脊髄を保護する方法がどこの施設でも簡単に行えるという点で最も臨床的価値が高いと考えられる。薬物による遮断あるいは活性化により保護効果の可能性があるシグナル伝達経路を一つずつ検証する地道な作業が必要である。今回の研究では、シナプス外N-methyl-D-aspartate (NMDA) 受容体の遮断による脊髄保護の可能性は低いことが判明した。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (2 results)

All 2019 2018

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Is the outcome after ischemic spinal cord injury improved by the inhibition of the signal transduction through extrasynaptic NMDA receptors in rabbits?2019

    • Author(s)
      Takehiko Fukui, Mishiya Matsumoto, et al.
    • Organizer
      The 6th Congress of Asian Society for Neuroanesthesia and Critical Care
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] メマンチンによる脊髄保護効果2018

    • Author(s)
      福井健彦、松本美志也
    • Organizer
      日本麻酔科学会第65回学術集会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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