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Aberrant axo-axonic synaptic reorganization in the calcium channel subunit alpha2 delta-1/L1-CAM-containing central terminals of injured c-fibers in the spinal cord of a neuropathic pain model

Research Project

Project/Area Number 17H04113
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Pain science
Research InstitutionHyogo Medical University

Principal Investigator

Noguchi Koichi  兵庫医科大学, 医学部, 学長・教授 (10212127)

Co-Investigator(Kenkyū-buntansha) 山中 博樹  兵庫医科大学, 医学部, 講師 (20340995)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Keywords神経障害性疼痛 / プロテアーゼ / 脊髄後角 / シナプス可塑性 / 細胞間接着
Outline of Final Research Achievements

In this study, we investigated the synchronized alterations in α2δ-1, L1-CAM and phoshorylated L1-CAM expression patterns in the injured c-fibers following peripheral nerve injury. These molecules were co-localized in hypertrophic varicosities in the central terminals of injured c-fibers of neuropathic pain model rats. Quantitative analyses revealed that the peripheral nerve injury reduced dendritic synaptic contacts but promoted aberrant axo-axonic contacts on the hypertrophic varicosities in which α2δ-1, L1-CAM and pL1-CAM were present. In the dorsal horn, administration of the anti-allodynic drug pregabalin inhibited the increase in α2δ-1 expression and suppressed the hypertrophy of L1-CAM labeled varicosities. Our findings highlight the formation of aberrant spinal circuits that mediate the convergence of local neuronal signals onto injured c-fibers, suggesting that these hypertrophic varicosities may be important in the mechanisms underlying neuropathic pain.

Academic Significance and Societal Importance of the Research Achievements

本研究課題の成果は難治性疼痛である神経傷害性疼痛のメカニズムとして可視化できるシナプス結合様式の変化を想定できた事に学術的な意義をもつ。また形態変化の現場に発現する再生・形態変化関連の分子を治療戦略ターゲットをとして研究対象とする事で、対象とする分子群を想定できる。また、in vitroの実験系でも形態変化のアッセイが可能となることから、in viroからの還元できる実験系を豊富に想定できる事になる。本研究が目指した形態変化と疼痛の関連を明らかにできれば新たな治療・創薬などの可能性を広げる社会的意義を持つと思われる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (19 results)

All 2019 2018

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (11 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Spinal glial cell line-derived neurotrophic factor infusion reverses reduction of Kv4.1-mediated A-type potassium currents of injured myelinated primary afferent neurons in a neuropathic pain model2019

    • Author(s)
      Shinoda Masamichi、Fukuoka Tetsuo、Takeda Mamoru、Iwata Koichi、Noguchi Koichi
    • Journal Title

      Molecular Pain

      Volume: 15 Pages: 1-12

    • DOI

      10.1177/1744806919841196

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] TRPA1-expressing lamina propria mesenchymal cells regulate colonic motility2019

    • Author(s)
      Yang Yanjing、Wang Shenglan、Kobayashi Kimiko、Hao Yongbiao、Kanda Hirosato、Kondo Takashi、Kogure Yoko、Yamanaka Hiroki、Yamamoto Satoshi、Li Junxiang、Miwa Hiroto、Noguchi Koichi、Dai Yi
    • Journal Title

      JCI Insight

      Volume: 4 Issue: 9 Pages: 122402-122402

    • DOI

      10.1172/jci.insight.122402

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Differential expression of mGluRs in rat spinal dorsal horns and their modulatory effects on nocifensive behaviors2019

    • Author(s)
      Okubo Masamichi、Yamanaka Hiroki、Kobayashi Kimiko、Noguchi Koichi
    • Journal Title

      Molecular Pain

      Volume: 15 Pages: 1-13

    • DOI

      10.1177/1744806919875026

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] TREK-1 and TRAAK Are Principal K+ Channels at the Nodes of Ranvier for Rapid Action Potential Conduction on Mammalian Myelinated Afferent Nerves2019

    • Author(s)
      Kanda Hirosato、Ling Jennifer、Tonomura Sotatsu、Noguchi Koichi、Matalon Sadis、Gu Jianguo G.
    • Journal Title

      Neuron

      Volume: 104 Issue: 5 Pages: 960-971.e7

    • DOI

      10.1016/j.neuron.2019.08.042

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pain matrix shift in the rat brain following persistent colonic inflammation revealed by voxel-based statistical analysis2019

    • Author(s)
      Huang T, Okauchi, T, Hu D, Shigeta M, Wu Y, Wada Y, Hayashinaka E, Wang S, Kogure Y, Noguchi K, Watanabe Y, Dai Y, Cui YL
    • Journal Title

      Molecular Pain

      Volume: 15 Pages: 1-12

    • DOI

      10.1177/1744806919891327

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recombinant interleukin-4 alleviates mechanical allodynia via injury-induced interleukin-4 receptor alpha in spinal microglia in a rat model of neuropathic pain.2018

    • Author(s)
      Okutani Hiroai, Yamanaka Hiroki, Kobayahi Kimiko, Okubo Masamichi, Noguchi Koichi.
    • Journal Title

      Glia

      Volume: 66 Issue: 8 Pages: 1775-1787

    • DOI

      10.1002/glia.23340

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Upregulation of calcium channel alpha-2-delta-1 subunit in dorsal horn contributes to spinal cord injury-induced tactile allodynia2018

    • Author(s)
      Kusuyama K, Tachibana T, Yamanaka H, Okubo M, Yoshiya S, Noguchi K.
    • Journal Title

      Spine J

      Volume: 18 Issue: 6 Pages: 1062-1069

    • DOI

      10.1016/j.spinee.2018.01.010

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Negative Regulation of TRPA1 by AMPK in Primary Sensory Neurons as a Potential Mechanism of Painful Diabetic Neuropathy.2018

    • Author(s)
      Wang S, Kobayashi K, Kogure Y, Yamanaka H, Yamamoto S, Yagi H, Noguchi K, Dai Y
    • Journal Title

      Diabetes

      Volume: 67(1) Issue: 1 Pages: 98-109

    • DOI

      10.2337/db17-0503

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Molecular mechanism of pain -novel findings in pain research-.2019

    • Author(s)
      Noguchi Koichi
    • Organizer
      AOSRA-PM2019 日本区域麻酔学会第6回学術集会
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 眼窩下神経CCIモデルによる神経障害性疼痛へのKv4.3チャネルの役割2019

    • Author(s)
      神田浩里, 戴毅, 野口光一, グージャングオ.
    • Organizer
      第41回日本疼痛学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 痛みのメカニズム最新の知見2019

    • Author(s)
      野口光一.
    • Organizer
      第32回日本軟骨代謝学会
    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
  • [Presentation] 開胸術の周術期における痛みとTRPA1遺伝子のDNAメチル化との関係2018

    • Author(s)
      竹中志穂, 辻彩乃, 助永憲比古, 野口光一, 廣瀬宗孝.
    • Organizer
      第40回日本疼痛学会
    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
  • [Presentation] 炎症性腸疾患モデルラットに伴う内臓痛に対する大建中湯の効果2018

    • Author(s)
      小暮洋子, 王勝蘭, 山本悟史, 野口光一, 戴毅.
    • Organizer
      第40回日本疼痛学会
    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
  • [Presentation] Effect of peripheral nerve injury on the Axo-axonic contacts between injured C-fiber and spinal neuron.2018

    • Author(s)
      Yamanaka H, Kobayashi K, Okubo M, Noguchi K.
    • Organizer
      17th IASP World Congerss on Pain
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cellullar distribution of brain derived neurotrophic factor in spinal dorsal horn of neuropathic pain model rats2018

    • Author(s)
      Kobayashi K, Yamanaka H, Okubo M, Noguchi K.
    • Organizer
      17th IASP World Congerss on Pain
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nedd4-2 in DRG neurons contributes to diabetic neuropathic pain through TRPA1 channels.2018

    • Author(s)
      Wang S, Kogure Y, Yamamoto S, Noguchi K, Dai Y.
    • Organizer
      17th IASP World Congerss on Pain
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of peripheral nerve injury on the Axo-axonic contacts between injured C-fiber and spinal neuron.2018

    • Author(s)
      Yamanaka H, Kobayashi K, Okubo M, Noguchi K.
    • Organizer
      17th IASP World Congress on Pain
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cellullar distribution of brain derived neurotrophic factor in spinal dorsal horn of neuropathic pain model rats2018

    • Author(s)
      Kobayashi K, Yamanaka H, Okubo M, Noguchi K.
    • Organizer
      17th IASP World Congress on Pain
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nedd4-2 in DRG neurons contributes to diabetic neuropathic pain through TRPA1 channels.2018

    • Author(s)
      Wang S, Kogure Y, Yamamoto S, Noguchi K, Dai Y.
    • Organizer
      17th IASP World Congress on Pain
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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