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Effects of delta opioid receptor agonists on perioperative cerebral ischemia models

Research Project

Project/Area Number 19K10357
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57060:Surgical dentistry-related
Research InstitutionTokyo Medical and Dental University (2021-2022)
Okayama University (2019-2020)

Principal Investigator

Maeda Shigeru  東京医科歯科大学, 大学院医歯学総合研究科, 教授 (50253000)

Co-Investigator(Kenkyū-buntansha) 樋口 仁  岡山大学, 大学病院, 准教授 (30423320)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsオピオイド受容体 / 脳虚血 / 炎症 / サイトカイン / オピオイド / 全身麻酔 / アポトーシス / マイクログリア / 中枢神経系 / interleukin-6 / 周術期 / ミクログリア
Outline of Research at the Start

2019年度は,主に周術期脳虚血モデルの記憶力の評価,および脳のサンプルから炎症とアポトーシスの評価を行い,それに対するDORアゴニスト(SNC80)の効果について調べる。
2020年度以降は,主に培養細胞を用いた実験を行う。OGDにおける培養ミクログリア(MG6)の炎症およびアポトーシスに関わる反応と,それに対するSNC80の効果を調べる。また,SNC80の抗炎症および抗アポトーシスに関わる細胞内シグナル伝達の機序を,cAMP合成抑制とリン酸化を中心として解明する。

Outline of Final Research Achievements

We have shown that remifentanil, a widely used general anesthetic, has anti-inflammatory effects on the central nervous system. In this study, we focused on the opioid receptor, especially the δ receptor, and investigated the effects of specific agonists and antagonists of this receptor in cultured cells. The results showed that the inflammatory response was enhanced under anaerobic conditions, and the same response was reproduced in cultured cells as in the animals. In addition, both agonists and antagonists of opioid δ-receptors tend to enhance the inflammatory response, suggesting that a disturbance in the balance of actions of each opioid receptor may enhance the inflammatory response in general.

Academic Significance and Societal Importance of the Research Achievements

私たちは高齢者の術後せん妄や認知機能の低下は,手術に伴う炎症反応の中枢神経系への波及と,循環動体の変動による一過性の脳虚血の相乗作用による中枢神経系の炎症反応ではないかと考えています。全世界で麻酔薬として使われているレミフェンタニルにより中枢神経系の炎症反応がコントロールされることもわかり,本研究では新たにδオピオイド受容体の関連について調べました。その結果,δ受容体は作用と阻害のいずれにおいても炎症反応を増強することがわかりました。これらの結果から,δ受容体は中枢神経系の炎症反応に関して直接的な作用を有するのではなく,間接的に複数の作用をもつことが考えられました。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2023 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Considerations for Satisfactory Sedation during Dental Implant Surgery2023

    • Author(s)
      Ito Takaya、Utsumi Nozomi、Baba Yukiko、Matsumura Tomoka、Wakita Ryo、Maeda Shigeru
    • Journal Title

      Journal of Personalized Medicine

      Volume: 13 Issue: 3 Pages: 461-461

    • DOI

      10.3390/jpm13030461

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dexmedetomidine inhibits LPS-induced inflammatory responses through peroxisome proliferator-activated receptor gamma (PPARγ) activation following binding to α2 adrenoceptors2021

    • Author(s)
      Fujimoto Maki、Higuchi Hitoshi、Honda-Wakasugi Yuka、Miyake Saki、Nishioka Yukiko、Yabuki-Kawase Akiko、Maeda Shigeru、Miyawaki Takuya
    • Journal Title

      European Journal of Pharmacology

      Volume: 892 Pages: 173733-173733

    • DOI

      10.1016/j.ejphar.2020.173733

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Assessing the Effectiveness of Combined Analgesics for Bilateral Ramus Osteotomies2020

    • Author(s)
      Maeda Shigeru、Higuchi Hitoshi、Fujimoto Maki、Miyake Saki、Honda-Wakasugi Yuka、Miyawaki Takuya
    • Journal Title

      Anesthesia Progress

      Volume: 67 Issue: 3 Pages: 140-145

    • DOI

      10.2344/anpr-67-01-05

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pulmonary Aspiration During Induction of General Anesthesia2020

    • Author(s)
      Hayashi Reina、Maeda Shigeru、Hideki Taninishi、Higuchi Hitoshi、Miyawaki Takuya
    • Journal Title

      Anesthesia Progress

      Volume: 67 Issue: 4 Pages: 214-218

    • DOI

      10.2344/anpr-67-02-03

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Delta opioid receptor ligand suppresses increase in IL-6 in cultured microglia2021

    • Author(s)
      S Maeda, S Miyake, M Fujimoto, Y Nishioka, H Hitoshi, T Miyawaki
    • Organizer
      IADR
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] デクスメデトミジンはペルオキシソーム増殖因子活性化受容体γ(PPARγ)活性を介してLPS誘発性炎症反応を抑制する2020

    • Author(s)
      藤本磨希,若杉優花,三宅沙紀,樋口 仁,前田 茂,宮脇卓也
    • Organizer
      第48回日本歯科麻酔学会総会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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