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Does opioid analgesia cause prolonged postoperative pain? -Involvement of spinal astroglial activation-

Research Project

Project/Area Number 20K09215
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55050:Anesthesiology-related
Research InstitutionGifu University (2022)
Niigata University (2020-2021)

Principal Investigator

SASAKI MIKA  岐阜大学, 医学系研究科, 特任講師 (20774061)

Co-Investigator(Kenkyū-buntansha) 馬場 洋  新潟大学, 医歯学系, 教授 (00262436)
紙谷 義孝  岐阜大学, 大学院医学系研究科, 教授 (90381491)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords術後痛 / オピオイド / アストロサイト / モルヒネ / 術後痛モデル / 術後遷延痛 / 機械刺激 / 熱刺激 / オスモティックポンプ / 脊髄後角 / 興奮性シナプス伝達
Outline of Research at the Start

オピオイドは術後鎮痛の主要な治療薬だが、一方で術後痛を遷延させることが基礎・臨床の両面から指摘されている。オピオイドの逆 説的な発痛作用(opioid-induced hyperalgesia: OIH)のメカニズムについては一酸化窒素や セロトニンといった原因となる神経伝達物質が同定されているが、興奮性シナプス伝達に及ぼす影 響、特にグリアを対象にした研究はまだ少ない。本研究では術後遷延痛の発症メカニズムを脊髄後 角のグリア細胞、特に興奮性シナプス伝達の調節に重要な役割を果たすアストログリアの活性化 に注目して明らかにすることを目的とする。

Outline of Final Research Achievements

This study aimed to clarify the relationship between opioid-induced postoperative analgesia and prolonged postoperative pain. First, four different degrees of injury were applied to the hind paw plantar region to create a mouse model of postoperative pain. Paw withdrawal thresholds to stimuli of the same area were measured over time, and no differences in paw withdrawal thresholds were found between the different degrees of injury. In addition, we examined how the paw withdrawal threshold to stimuli to the site of injury changes when analgesia using morphine is applied to a mouse model of postoperative pain. Even when morphine was administered at 20 mg/kg/day x 5 days using an osmotic pump, prolonged pain did not occur as measured up to the 14th postoperative day. Therefore, it was considered that opioids did not induce prolonged postoperative pain.

Academic Significance and Societal Importance of the Research Achievements

本研究から、動物種が異なると同じ疼痛モデルを用いたとしても反応が異なる可能性が明らかになった。このことは他の行動学的実験にも言えることではあるが、特に疼痛関連の研究では結果の解釈に注意を要することを意味する。
また、これまでオピオイドによる鎮痛が遷延性術後痛に関連するという報告がある一方、術直後の痛みが強い場合は術後痛が慢性化しやすいという臨床データがあり、適切に鎮痛を行うことが遷延性術後痛を予防する可能性が示唆されているが、本研究からオピオイドを用いた術後鎮痛であってもそれが適切なものであれば遷延性術後痛には結びつかないことが示唆されたことは、術後鎮痛の安全性に関しての有用な情報と考えられる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Neuronal Nitric Oxide Synthase Suppression Confers the Prolonged Analgesic Effect of Sciatic Nerve Block With Perineural Dexamethasone in Postoperative Pain Model Mice2022

    • Author(s)
      Matsuda Keiichiro、Sasaki Mika、Baba Hiroshi、Kamiya Yoshinori
    • Journal Title

      The Journal of Pain

      Volume: 23 Issue: 10 Pages: 1765-1778

    • DOI

      10.1016/j.jpain.2022.06.001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural and functional properties of spinal dorsal horn neurons after peripheral nerve injury change overtime via astrocyte activation2022

    • Author(s)
      Kurabe Miyuki、Sasaki Mika、Furutani Kenta、Furue Hidemasa、Kamiya Yoshinori、Baba Hiroshi
    • Journal Title

      iScience

      Volume: 25 Issue: 12 Pages: 105555-105555

    • DOI

      10.1016/j.isci.2022.105555

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Subanesthetic Dose of Propofol Activates the Reward System in Rats2021

    • Author(s)
      Nagata Isao、Sasaki Mika、Miyazaki Tomoyuki、Saeki Kensuke、Ogawa Ken-ichi、Kamiya Yoshinori
    • Journal Title

      Anesthesia & Analgesia

      Volume: Publish Ahead of Print Issue: 2 Pages: 414-426

    • DOI

      10.1213/ane.0000000000005847

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Serotonin Plays a Key Role in the Development of Opioid-Induced Hyperalgesia in Mice2021

    • Author(s)
      Sasaki Mika、Kamiya Yoshinori、Bamba Keiko、Onishi Takeshi、Matsuda Keiichiro、Kohno Tatsuro、Kurabe Miyuki、Furutani Kenta、Yanagimura Harue
    • Journal Title

      The Journal of Pain

      Volume: - Issue: 6 Pages: 715-729

    • DOI

      10.1016/j.jpain.2020.12.008

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Functional and structural changes in spinal dorsal horn neurons after peripheral nerve injury are long term regulated by astrocytes2022

    • Author(s)
      Kurabe M, Sasaki M, Furutani K, Baba H
    • Organizer
      Neuroscience 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Book] 痛み診療 All in One2022

    • Author(s)
      山本達郎
    • Total Pages
      336
    • Publisher
      文光堂
    • ISBN
      9784830628542
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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