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A study on the roles of neuron-glia interactions in neuropathic pain

Research Project

Project/Area Number 16K11440
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Morphological basic dentistry
Research InstitutionHiroshima University (2017-2018)
Okayama University (2016)

Principal Investigator

Terayama Ryuji  広島大学, 医系科学研究科(歯), 教授 (60333689)

Research Collaborator MARUHAMA kotaro  
TABATA mitsuyasu  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords痛覚異常 / 神経損傷 / 収斂投射 / ミクログリア / アストロサイト / ニューロン / 脊髄 / 三叉神経知覚核群 / アストログリア / アデノシン / 中枢神経系 / 脳・神経 / 細胞・組織 / 歯学 / シグナル伝達 / 疼痛
Outline of Final Research Achievements

In this study, we investigated the involvement of changes in the neuronal excitability and glial activation in the abnormal pain sensation after peripheral nerve injury. The effects of drug administration on neuropathic pain were also examined. We clarified that activation of glial cells surrounding secondary neurons in the CNS was involved in changes in the excitability of neurons and that modalities of nociceptive transmission were altered after nerve injury. Moreover, we found that the systemic administration of the A3AR agonist attenuates neuropathic pain states by suppressing enhanced microglial activation, and anomalous convergence of nociceptive inputs in the spinal dorsal horn from uninjured afferents after injury to the peripheral nerve.

Academic Significance and Societal Importance of the Research Achievements

現在の疼痛治療はニューロンの興奮性を抑制する一時的な対症療法が基本となっているが、ニューロンとグリア細胞の相互作用が明らかになったことで神経障害性疼痛の効果的な治療法につながる新しい概念を提供する可能性がある。病的疼痛のコントロールは歯科領域だけでなく普遍的な医療上の大問題である。本研究は新しい視点からこれにチャレンジして、解決方法や新たな治療法への糸口を開くものであり、これからの基礎研究だけでなく臨床応用を含めた広い波及効果が期待できる。

Report

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

    (9 results)

All 2018 2017 2016

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] A3 adenosine receptor agonist attenuates neuropathic pain by suppressing activation of microglia and convergence of nociceptive inputs in the spinal dorsal horn.2018

    • Author(s)
      Terayama R, Tabata M, Maruhama K, Iida S
    • Journal Title

      Exp Brain Res.

      Volume: 236 Issue: 12 Pages: 3203-3213

    • DOI

      10.1007/s00221-018-5377-1

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 神経障害性疼痛におけるシナプス異常の新知見2018

    • Author(s)
      寺山隆司
    • Journal Title

      月刊「細胞」

      Volume: 50 Pages: 33-36

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Differential induction of c-Fos and phosphorylated ERK by a noxious stimulus after peripheral nerve injury.2018

    • Author(s)
      Tabata M, Terayama R, Maruhama K, Iida S, Sugimoto T.
    • Journal Title

      Int J Neurosci.

      Volume: 128 Issue: 3 Pages: 208-218

    • DOI

      10.1080/00207454.2017.1381697

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Differential Changes in Neuronal Excitability in the Spinal Dorsal Horn After Spinal Nerve Ligation in Rats.2016

    • Author(s)
      Terayama R, Yamamoto Y, Kishimoto N, Tabata M, Maruhama K, Iida S, Sugimoto T.
    • Journal Title

      Neurochem Res.

      Volume: 41 Issue: 11 Pages: 2880-2889

    • DOI

      10.1007/s11064-016-2003-0

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 下歯槽神経損傷後の延髄後角における収斂投射2018

    • Author(s)
      寺山隆司、丸濱功太郎
    • Organizer
      第60回歯科基礎医学会学術大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 末梢神経損傷後の侵害刺激に対する脊髄後角でのc-Fosおよびp-ERKの誘発変化について2017

    • Author(s)
      田畑光康、寺山隆司、丸濱功太郎、飯田征二、杉本朋貞
    • Organizer
      日本解剖学会第72回中国・四国支部学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] 末梢神経損傷による脊髄後角ニューロンの興奮性の変化について2017

    • Author(s)
      寺山隆司
    • Organizer
      第43回岡山脳研究セミナー
    • Place of Presentation
      岡山市
    • Related Report
      2016 Research-status Report
  • [Presentation] 末梢神経損傷後の脊髄後角ニューロンの興奮性における時間空間的変化2016

    • Author(s)
      寺山隆司,山本裕也,岸本宜子,田畑光康,丸濱功太郎,飯田征二,杉本朋貞
    • Organizer
      第58回歯科基礎医学会学術大会・総会
    • Place of Presentation
      札幌市
    • Year and Date
      2016-08-24
    • Related Report
      2016 Research-status Report
  • [Presentation] Mechanisms of orofacial nociception and neuropathic pain2016

    • Author(s)
      Ryuji Terayama
    • Organizer
      Oral Neuroscience 2016
    • Place of Presentation
      大阪市
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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

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