Delayed Mitochondrial Membrane Potential Disruption by ATP in Cultured Rat Hippocampal Neurons Exposed to N-Methyl-D-Aspartate

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著者

    • Fujikawa Koichi FUJIKAWA Koichi
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology
    • Kato Shunsuke [他] KATO Shunsuke
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology
    • FUKUMORI Ryo
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology
    • HIDA Miho
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology
    • TAKARADA Takeshi
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology
    • YONEDA Yukio
    • Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology

抄録

Necrotic damage leads to a massive leakage from injured cells of different intracellular constituents such as glutamate (Glu) and ATP, which are believed to play a role in the neuronal survival in the brain. In this study, we evaluated pharmacological properties of ATP, which is shown to be an endogenous inhibitor of <I>N</I>-methyl-D-aspartate (NMDA) receptors, on the neurotoxicity relevant to mitochondrial membrane potential disruption in cultured rat hippocampal neurons. Exposure to Glu or NMDA significantly inhibited cellular viability determined 24 and 48 h later, while simultaneous addition of 1 mM ATP significantly ameliorated the decreased viability in neurons exposed to Glu and NMDA, but not in those exposed to other cytotoxins. Both Glu and NMDA markedly increased intracellular free Ca<SUP>2+</SUP> levels in a manner sensitive to blockade by the exposure to ATP, but not by that to adenosine. Exposure to ATP significantly delayed the rate of mitochondrial membrane potential disruption induced by Glu and NMDA. These results suggest that extracellular ATP would play a role as an endogenous antagonist endowed to protect rat hippocampal neurons from the excitotoxicity mediated by NMDA receptors in association with the delayed mitochondrial membrane potential disruption after the liberation from adjacent cells under necrotic death.

収録刊行物

  • Journal of pharmacological sciences

    Journal of pharmacological sciences 119(1), 20-29, 2012-05-20

    公益社団法人 日本薬理学会

参考文献:  40件中 1-40件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10030760182
  • NII書誌ID(NCID)
    AA11806667
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13478613
  • NDL 記事登録ID
    023634654
  • NDL 請求記号
    Z53-D199
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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