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A study to visualize chronic pain by cerebrospinal microglial imaging by the PET

Research Project

Project/Area Number 18K19588
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 55:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionFukushima Medical University

Principal Investigator

Obata Hideaki  福島県立医科大学, 医学部, 教授 (20302482)

Co-Investigator(Kenkyū-buntansha) 宿里 充穗  昭和薬科大学, 薬学部, 講師 (20525571)
織内 昇  福島県立医科大学, 公私立大学の部局等, 教授 (40292586)
紺野 愼一  福島県立医科大学, 医学部, 教授 (70254018)
加藤 孝一  国立研究開発法人国立精神・神経医療研究センター, 脳病態統合イメージングセンター, 室長 (50382198)
須藤 貴史  群馬大学, 医学部附属病院, 講師 (60739621)
Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords慢性痛 / 内因性鎮痛系 / [11C]PBR28 / TSPO PETリガンド / ミクログリア / PET / 脳脊髄 / P2X受容体 / P2X7受容体
Outline of Final Research Achievements

The microglia of the dorsal horn of the spinal cord greatly participates in the onset and maintenance of the chronic pain. We planned a study based on a hypothesis that the microglial activation of the brain also played an important role to the maintenance of the chronic pain. In the present study, a time-course of the microglial activation in the brain was investigated using PET in a rat model of chronic pain (spinal nerve ligation: SNL). [11C]PBR28 was used as the microglial tracer, and an increase of microglia was observed after the nerve ligation in the part participating in the reward system such as the ventral tegmental area and the nucleus accumbens until 12 weeks later. In the clinical study, we are collecting data to perform brain microglial PET in patients with chronic pain.

Academic Significance and Societal Importance of the Research Achievements

ミクログリアの活性化は中枢神経系での炎症(異常)を引き起こす。末梢神経を損傷した動物では脊髄後角のミクログリアが活性化し、慢性痛の発症と維持に大きく関与する。しかし脳内ミクログリアと慢性痛の関連を示す研究は、これまでのところ動物でも人でも行われていない。今回の研究では同一個体の慢性痛モデルを使った動物実験で、神経損傷後の脳内ミクログリアの活性化の経時変化を検討したことは、極めて重要な知見になると思われる。臨床研究では慢性痛患者で内因性鎮痛が減弱している結果が得られつつあり、脳内ミクログリアの活性化との関連が証明されれば、慢性痛の機序と治療法の解明に大きな役割を果たすと考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (21 results)

All 2021 2020 2019 2018

All Journal Article (12 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] 痛みの下行性制御とプラセボ鎮痛2021

    • Author(s)
      小幡英章、荻野祐一
    • Journal Title

      ペインクリニック

      Volume: ー

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 慢性疼痛の発生機序2020

    • Author(s)
      小幡英章
    • Journal Title

      Progress in Medicine

      Volume: 40 Pages: 799-803

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 慢性痛の薬物療法: α2δリガンド・デュロキセチン2020

    • Author(s)
      小幡英章
    • Journal Title

      Bone Joint Nerve

      Volume: 10 Pages: 595-599

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 中枢神経系における抗うつ薬の鎮痛メカニズム2020

    • Author(s)
      小幡英章
    • Journal Title

      ペインクリニック

      Volume: 41 Pages: 1607-1614

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Loss of endogenous analgesia leads to delayed recovery from incisional pain in a rat model of chronic neuropathic pain2020

    • Author(s)
      Ohta J, Suto T, Kato D, Hiroki T, Obata H, Saito
    • Journal Title

      Brain Res

      Volume: 1727 Pages: 146568-146568

    • DOI

      10.1016/j.brainres.2019.146568

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 疼痛の発症機序-Fasciaはどのように関与するか2020

    • Author(s)
      小幡英章
    • Journal Title

      臨床スポーツ医学

      Volume: 37 Pages: 170-175

    • Related Report
      2019 Research-status Report
  • [Journal Article] 慢性痛の薬物療法2020

    • Author(s)
      小幡英章
    • Journal Title

      日本医師会雑誌

      Volume: 149 Pages: 51-54

    • Related Report
      2019 Research-status Report
  • [Journal Article] 神経障害性疼痛の機序と治療2020

    • Author(s)
      小幡英章
    • Journal Title

      ペインクリニック

      Volume: 41 Pages: 621-62

    • Related Report
      2019 Research-status Report
  • [Journal Article] Tropomyosin receptor kinase B receptor activation in the locus coeruleus restores impairment of endogenous analgesia at a late stage following nerve injury in rats2019

    • Author(s)
      Suto T, Kato D, Obata H, Saito S
    • Journal Title

      J Pain

      Volume: 20 Issue: 5 Pages: 600-609

    • DOI

      10.1016/j.jpain.2018.11.008

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strategies to treat chronic pain and strengthen impaired descending noradrenergic inhibitory system2019

    • Author(s)
      Hayashida K, Obata H
    • Journal Title

      Int J Mol Sci

      Volume: 20 Issue: 4 Pages: 822-822

    • DOI

      10.3390/ijms20040822

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spinal activation of tropomyosin receptor kinase-B recovers the impaired endogenous analgesia in neuropathic pain rats2018

    • Author(s)
      Kato D, Suto T, Obata H, Saito S
    • Journal Title

      Anesth Analg

      Volume: 印刷中 Issue: 2 Pages: 578-586

    • DOI

      10.1213/ane.0000000000003592

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 運動器慢性疼痛における末梢(性)感作と中枢(性)感作2018

    • Author(s)
      徳岡宏文, 新庄勝浩, 小幡英章
    • Journal Title

      新薬と臨床

      Volume: 69

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 痛みの慢性化と下行性疼痛調節系2021

    • Author(s)
      小幡英章
    • Organizer
      第26回緩和医療学会学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 脊髄GABA作動性介在ニューロンの可塑的変化によりモルヒネの神経障害性疼痛への鎮痛効果が減弱する.2020

    • Author(s)
      廣木忠直 須藤貴史 太田淨 齋藤繁 小幡英章
    • Organizer
      日本麻酔科学会第67回学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] The plasticity of spinal γ-aminobutyric acid interneurons reduces analgesic effects of morphine in neuropathic pain2019

    • Author(s)
      Hiroki T, Suto T, Ohta J, Saito S, Obata H
    • Organizer
      Society for Neuroscience Annual Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Loss of endogenous analgesia leads to delayed recovery from incisional pain in a rat model of chronic neuropathic pain2019

    • Author(s)
      Ohta J, Suto T, Hiroki T, Obata H
    • Organizer
      Society for Neuroscience Annual Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ファシアの急性痛・慢性痛への関与と慢性痛治療の問題点2019

    • Author(s)
      小幡英章
    • Organizer
      第124回日本解剖学会・全国学術集会シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] Attenuation of analgesic effect of duloxetine in a rat model of chronic neuropathic pain2018

    • Author(s)
      Suto T, Kato D, Obata H, Saito S
    • Organizer
      17th world congress on pain
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 神経障害性疼痛モデル慢性期におけるデュロキセチンによる鎮痛の減弱とそのメカニズム2018

    • Author(s)
      須藤貴史、齋藤繁、小幡英章
    • Organizer
      日本麻酔科学会第65回学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] 神経障害性痛ではモルヒネの鎮痛作用が減弱する -セロトニン作動性下行性痛み調節系の可塑性変化についての検討-2018

    • Author(s)
      廣木忠直、須藤貴史、齋藤繁、小幡英章
    • Organizer
      日本麻酔科学会第65回学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] 直腸がん再発腫瘍摘出後の難治性疼痛に筋膜リリース注射が著効した一例2018

    • Author(s)
      佐藤薫、中野裕子、大石理江子、小幡英章、村川雅洋
    • Organizer
      日本ペインクリニック学会第52回大会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2022-01-27  

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