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The mechanisms of the anxiolytic-like effects induced by delta opioid receptor agonists using conditioned fear test in mice

Research Project

Project/Area Number 17K10286
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Psychiatric science
Research InstitutionTokyo University of Science (2018-2019)
National Center of Neurology and Psychiatry (2017)

Principal Investigator

Saitoh Akiyoshi  東京理科大学, 薬学部薬学科, 教授 (00366832)

Co-Investigator(Kenkyū-buntansha) 山田 美佐  国立研究開発法人国立精神・神経医療研究センター, 精神保健研究所 精神薬理研究部, 科研費研究員 (10384182)
岡 淳一郎  東京理科大学, 薬学部薬学科, 教授 (40134613)
山田 光彦  国立研究開発法人国立精神・神経医療研究センター, 精神保健研究所 精神薬理研究部, 部長 (60240040)
関口 正幸  国立研究開発法人国立精神・神経医療研究センター, 神経研究所 疾病研究第四部, 室長 (80260339)
山田 大輔  東京理科大学, 薬学部薬学科, 助教 (10621302)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsオピオイドδ受容体 / 恐怖記憶 / 不安 / 情動行動 / PTSD / 抗不安薬 / ERK / オピオイド / 恐怖 / 消去学習 / 情動 / 扁桃体 / 海馬 / 抑うつ / 内側前頭前野 / オピオイド受容体 / 抗うつ薬 / 精神薬理学
Outline of Final Research Achievements

We reported previously that KNT-127 and SNC80, selective agonists δ-opioid receptor (DOP) agonist had potent anxiolytic-like effects in rodents. In the present study, we investigated the mechanisms of the anxiolytic-like effects induced by DOP agonists using conditioned fear test in mice. KNT-127 and SNC80 produce anxiolytic-like effects on contextual conditioned fear. On the other hand, KNT-127, but not SNC80, facilitated extinction of contextual fear memory. In addition, KNT-127, but not SNC80, increases phosphorylation of ERK1/2 in the AMY and HPC after extinction learning. These results suggested that amygdaloid and hippocampal MAPK/ERK signaling serves as the key mediators of the enhancement of extinction learning of contextual fear memory via DOPs after KNT-127 treatment. We propose that KNT-127 and SNC80 have different mechanisms on extinction learning of fear memory.

Academic Significance and Societal Importance of the Research Achievements

恐怖記憶は危険を回避して生存するために不可欠な情動機能であるが、過度な恐怖記憶はPTSDや不安症等の精神疾患の病態に関与することが報告されている。その治療においては、恐怖を獲得した環境を危険でないと学習する“消去学習”を基礎過程とする認知行動療法の有効性が認められているが、現状では繰り返し長期間の治療が必要であることから、消去学習を促進する薬物による治療期間短縮が期待されている。本課題の成果から、KNT-127をリードとした選択的DOP作動薬が、PTSDや恐怖症など恐怖記憶の処理異常を呈する精神疾患に対して、優れた新規治療薬になる可能性を示唆することができた。

Report

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

    (11 results)

All 2019 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Selective agonists of the δ-opioid receptor, KNT-127 and SNC80, act differentially on extinction learning of contextual fear memory in mice2019

    • Author(s)
      DaisukeYamada,Shoko Yanagisawa, Kazumi Yoshizawa, Shinya Yanagita, Jun-Ichiro Oka, Hiroshi Nagase, Akiyoshi Saitoh
    • Journal Title

      NEUROPHARMACOLOGY

      Volume: 160 Pages: 111974-111974

    • DOI

      10.1016/j.neuropharm.2019.107792

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Research and development of κ opioid receptor agonists and δ opioid receptor agonists2019

    • Author(s)
      Hiroshi Nagase, Akiyoshi Saitoh.
    • Journal Title

      Pharmacology & Therapeutics

      Volume: 205 Pages: 107427-107427

    • DOI

      10.1016/j.pharmthera.2019.107427

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] オピオイドδ受容体をターゲットとした向精神薬の可能性2017

    • Author(s)
      斎藤顕宜、山田光彦
    • Journal Title

      精神科

      Volume: 30 Pages: 95-99

    • Related Report
      2017 Research-status Report
  • [Presentation] KNT-127, but not SNC80, facilitates extinction learning of contextual fear memory via delta opioid receptor in mice2019

    • Author(s)
      Akiyoshi Saitoh, Daisuke Yamada, Shoko Yanagisawa, Shinya Yanagita, Jun-Ichiro Oka, Hiroshi Nagase
    • Organizer
      International Narcotics Research Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] KNT127, a selective agonist for delta-receptors, modulates excitatory synaptic transmission in the medial prefrontal cortex2019

    • Author(s)
      Daisuke Yamada, Jun-Ichiro Oka, Hiroshi Nagase, Akiyoshi Saitoh
    • Organizer
      International Narcotics Research Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modulation of excitatory synaptic transmission via δ-opioid receptors in the mouse cerebral cortex2019

    • Author(s)
      Daisuke Yamada, Jun-ichiro Oka, Hiroshi Nagase, Akiyoshi Saitoh
    • Organizer
      The 42nd Annual Meeting of the Japan Neuroscience Society, The 62nd Annual Meeting of the Japanese for Neurochemistry
    • Related Report
      2019 Annual Research Report
  • [Presentation] A Selective agonist for δ-opioid receptors, KNT-127, but not SNC80, facilitates extinction learning of contextual fear memory in mice2019

    • Author(s)
      Shoko Yanagisawa, Daisuke Yamada, Shinya Yanagita, Jun-ichiro Oka, Hiroshi Nagase, Akiyoshi Saitoh
    • Organizer
      The 42nd Annual Meeting of the Japan Neuroscience Society, The 62nd Annual Meeting of the Japanese for Neurochemistry
    • Related Report
      2019 Annual Research Report
  • [Presentation] Selective agonists for delta-opioid receptor, KNT-127 and SNC80, differentially act on extinction learning of contextual fear memory in mice2019

    • Author(s)
      Daisuke Yamada, Shoko Yanagisawa, Shinya Yanagita, Jun-Ichiro Oka, Hiroshi Nagase, Akiyoshi Saitoh
    • Organizer
      Society for Neuroscience 49th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 文脈的恐怖条件づけ試験における選択的δオピオイド受容体作動薬の消去学習に対する影響2019

    • Author(s)
      柳澤祥子、山田大輔、長瀬博、斎藤顕宜
    • Organizer
      第139回日本薬学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 恐怖記憶の脳神経回路と不安症2018

    • Author(s)
      関口正幸
    • Organizer
      第10回日本不安症学会学術大会
    • Related Report
      2017 Research-status Report
  • [Presentation] オピオイドδ受容体を標的とした向精神薬開発の可能性2017

    • Author(s)
      斎藤顕宜、長瀬博、山田光彦
    • Organizer
      第37回鎮痛薬・オピオイドペプチドシンポジウム
    • Related Report
      2017 Research-status Report

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

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