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Mechanisms of insulocortical neural dynamics in the alert animals revealed by calcium imaging techniques

Research Project

Project/Area Number 21K19616
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 57:Oral science and related fields
Research InstitutionNihon University

Principal Investigator

KOBAYASHI Masayuki  日本大学, 歯学部, 教授 (00300830)

Co-Investigator(Kenkyū-buntansha) 新井 嘉則  日本大学, 歯学部, 教授 (20212607)
尾崎 弘展  東京女子医科大学, 医学部, 助教 (30747697)
大橋 一徳  日本大学, 歯学部, 助教 (90617458)
Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords島皮質 / カルシウムイメージング / 逃避行動 / カルシウムイメージング法 / in vivoイメージング / 二光子レーザー顕微鏡 / 痛覚 / 侵害刺激 / GCamp6s / ニューロン活動 / 大脳皮質 / 覚醒 / 神経回路
Outline of Research at the Start

難治性疼痛を寛解させる新たな治療法の開発には,痛みの情報処理に関わる受容体や神経回路の詳細なメカニズム解明が不可欠である。慢性疼痛の一原因と考えられる島皮質における神経回路の組換えを包括的に理解するために,本研究は,深さ方向を含めた三次元空間におけるニューロン活動を高速度・高解像度で記録できるイメージング法を開発する。さらに,痛みは情動によって大きく影響されることを念頭に置き,覚醒下で逃避行動に関わる島皮質局所神経回路の動作メカニズム(活性化されるニューロンの空間分布及び活性相関)を解明し,麻酔下での神経活動との違いを明らかにする。

Outline of Final Research Achievements

We developed the method to insert a prism for imaging deep brain areas without destroying the dorsal cerebral cortex. This method enabled us to image neural activities of the insular cortex at least for a week by measuring intracellular Ca2+ concentration using a two-photon laser microscope. As a result, macroscopic neural responses of the insular cortex to stimulation of the maxillary or mandibular periodontal ligament of the first molar were indistinguishable, whereas each neuron showed its own pattern to t maxillary or mandibular periodontal ligament stimulation. On the other hand, left or right stimulation induced differential macroscopic activation patterns. In parallel, we were engaged to build up the system to estimate behaviors escaping from nociceptive stimulation by irradiation of red laser.

Academic Significance and Societal Importance of the Research Achievements

島皮質は,口腔顔面領域の様々な感覚情報が収束する領野であるが,側頭葉の腹側に存在するため,頭頂からのアプローチが難しく,局所神経回路を含む情報処理機構の解明が他の感覚野と比較して遅れていた。本研究課題による成果は,特にin vivoにおける島皮質ニューロンの挙動を明らかにする上で重要なツールになることから,今後の歯学研究発展に大いに寄与するものである。また,島皮質と扁桃体や視床下部との相互連絡が密であり,情動系の情報処理に島皮質が深く関わっていることを考えると,口腔顔面感覚に起因する情動のメカニズムを解明することにも貢献する成果であると考えられる。

Report

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

    (14 results)

All 2023 2022 2021 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Descending projections from the insular cortex to the trigeminal spinal subnucleus caudalis facilitate excitatory outputs to the parabrachial nucleus in rats.2023

    • Author(s)
      Nakaya Y, Yamamoto K, Kobayashi M
    • Journal Title

      PAIN

      Volume: 164 Issue: 3 Pages: 157-173

    • DOI

      10.1097/j.pain.0000000000002755

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Insular cortical descending projections facilitate neuronal responses to noxious but not innoxious stimulation in rat trigeminal spinal subnucleus caudalis.2023

    • Author(s)
      Nakaya Y, Iwata K, Kobayashi M
    • Journal Title

      Brain Res

      Volume: 804 Pages: 148248-148248

    • DOI

      10.1016/j.brainres.2023.148248

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Insulin facilitates synaptic transmission via gap junctions between fast-spiking interneurons in the rat insular cortex2023

    • Author(s)
      Kosukegawa S, Nakaya Y, Kobayashi S, Kitano K, Matsumura S, Ogisawa S, Zama M, Motoyoshi M, Kobayashi M
    • Journal Title

      Journal of Oral Science

      Volume: 65 Issue: 2 Pages: 77-80

    • DOI

      10.2334/josnusd.22-0438

    • ISSN
      1343-4934, 1880-4926
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Repetitive nociceptive stimulation increases spontaneous neural activation similar to nociception-induced activity in mouse insular cortex2022

    • Author(s)
      Kobayashi Shutaro、O’Hashi Kazunori、Kobayashi Masayuki
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-022-19562-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neural Subtype-dependent Cholinergic Modulation of Neural Activities by Activation of Muscarinic 2 Receptors and G Protein-activated Inwardly Rectifying Potassium Channel in Rat Periaqueductal Gray Neurons2022

    • Author(s)
      Sugawara Shiori、Nakaya Yuka、Matsumura Sachie、Hirose Kensuke、Saito Yasuhiko、Kaneko Ryosuke、Kobayashi Masayuki
    • Journal Title

      Neuroscience

      Volume: 506 Pages: 1-13

    • DOI

      10.1016/j.neuroscience.2022.10.012

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synchronous inhibitory synaptic inputs to layer II/III pyramidal neurons in the murine barrel cortex2021

    • Author(s)
      Yamamoto Kiyofumi、Nakaya Yuka、Sugawara Shiori、Kobayashi Masayuki
    • Journal Title

      Brain Research

      Volume: 1773 Pages: 147686-147686

    • DOI

      10.1016/j.brainres.2021.147686

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Differential regulation of medium spiny and cholinergic neurons in the nucleus accumbens core by the insular and medial prefrontal cortices in the rat2021

    • Author(s)
      Hirose Kensuke、Nakaya Yuka、Kitano Kohei、Saito Yasuhiko、Kaneko Ryosuke、Yanagawa Yuchio、Yamamoto Kiyofumi、Shirakawa Tetsuo、Kobayashi Masayuki
    • Journal Title

      Pfl?gers Archiv - European Journal of Physiology

      Volume: 473 Issue: 12 Pages: 1911-1924

    • DOI

      10.1007/s00424-021-02634-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Chemogenetic strategies to investigate the role of projections from the insular cortex to the trigeminal spinal subnucleus caudalis in pain-related behaviors of rats2023

    • Author(s)
      Nakaya Y, Yamamoto K, Kobayashi M
    • Organizer
      第100回日本生理学会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 歯根膜侵害刺激により生じる大脳皮質自発活動の動態変化2022

    • Author(s)
      小林秀太朗,大橋一徳,小林真之
    • Organizer
      第99回日本生理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] オプトジェネティクス法を用いた島皮質PV細胞の活性化による疼痛制御効果2022

    • Author(s)
      小林理美,藤田智史,小林真之
    • Organizer
      第146回日本薬理学会関東部会
    • Related Report
      2022 Annual Research Report
  • [Presentation] プロポフォール誘発アルファ周波数帯増強の皮質内メカニズム2022

    • Author(s)
      小柳裕子,小林真之
    • Organizer
      日本臨床麻酔学会第42回大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Insular cortical projections to the trigeminal spinal subnucleus caudalis regulate pain-related behaviors in rats2022

    • Author(s)
      Nakaya Y, Kobayashi M
    • Organizer
      第64回歯科基礎医学会
    • Related Report
      2022 Annual Research Report
  • [Remarks] 日本大学歯学部薬理学講座HP

    • URL

      http://www2.dent.nihon-u.ac.jp/pharmacology/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 日本大学歯学部薬理学講座

    • URL

      http://www2.dent.nihon-u.ac.jp/pharmacology/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-07-13   Modified: 2024-01-30  

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