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Elucidation of the molecular basis governing the construction of spinal neural circuits involved in visceral pain transmission

Research Project

Project/Area Number 19K07855
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionKansai Medical University

Principal Investigator

NISHIDA Kazuhiko  関西医科大学, 医学部, 助教 (80448026)

Co-Investigator(Kenkyū-buntansha) 寿野 良二  関西医科大学, 医学部, 准教授 (60447521)
片野 泰代  関西医科大学, 医学部, 准教授 (60469244)
Project Period (FY) 2019-04-01 – 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 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords内臓痛 / 脊髄後角 / 神経回路 / 介在ニューロン / 発生運命
Outline of Research at the Start

内臓痛の伝達に関与する脊髄内神経回路の実体は明らかとなっていない。本研究では第一に、内臓痛の脊髄内情報伝達に、脊髄内長距離ニューロンを介する独自の神経回路が関与する可能性を検証する。脊髄内長距離ニューロンの神経活動を特異的に誘導阻害する系を構築し、その際の内臓痛への応答をマウス行動解析、神経活動解析の両面から調べる。第二に、内臓痛伝達に関与する脊髄内神経回路構築の分子メカニズムの解明を目的として、脊髄内長距離ニューロンの発生を制御する候補分子の関与について調べる。候補分子をノックダウンおよび異所性発現させた際の、長距離ニューロンの発生への影響、内臓痛応答への影響を評価する。

Outline of Final Research Achievements

To elucidate the spinal circuitry involved in the transmission of visceral pain information, we utilized a mouse model of inflammatory bowel disease (DSS model). Analysis of visceral pain-responsive spinal neurons in the mouse through immunostaining with c-fos revealed that c-fos-positive neurons were predominantly localized in the superficial spinal dorsal horn at the lumbosacral (L6-S1) level. Co-immunostaining of several molecular markers for spinal dorsal horn neurons demonstrated that approximately 30% of visceral pain-responsive neurons expressed Brn3a. Interestingly, the proportion of Brn3a-positive neurons among somatic pain-responsive neurons was significantly lower than that among visceral pain-responsive neurons. These findings suggest the involvement of Brn3a-positive spinal dorsal horn neurons in the transmission of visceral pain.

Academic Significance and Societal Importance of the Research Achievements

近年の国内外の研究より、機械、温度、痒み等の体性感覚の伝達に関与する脊髄後角の神経サブタイプが徐々に明らかになりつつある。しかしながら、我々に身近である内臓痛を伝達する神経回路については、体性感覚に比べて理解が進んでいない。本研究の成果は、内臓痛を特異的に伝達する脊髄後角神経回路の存在を示唆するものであり、感覚情報伝達全般の包括的な理解につながる点において学術的意義がある。また、内臓痛特異的な神経回路の解明はそれを標的とした内臓痛特異的鎮痛薬の開発にもつながり、社会的意義も極めて大きい。

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

    (9 results)

All 2023 2022 2021 2019 Other

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

  • [Journal Article] Brn3a controls the soma localization and axonal extension patterns of developing spinal dorsal horn neurons2023

    • Author(s)
      Kazuhiko Nishida, Shinji Matsumura, Hitoshi Uchida, Manabu Abe, Kenji Sakimura, Tudor Constantin Badea, Takuya Kobayashi
    • Journal Title

      biorxiv

      Volume: 10.1101/2023.04.20.537625 Pages: 537625-537625

    • DOI

      10.1101/2023.04.20.537625

    • Related Report
      2022 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Involvement of Brn3a-positive spinal dorsal horn neurons in the transmission of visceral pain in inflammatory bowel disease model mice2022

    • Author(s)
      Nishida Kazuhiko、Matsumura Shinji、Kobayashi Takuya
    • Journal Title

      Frontiers in Pain Research

      Volume: 3 Pages: 1-16

    • DOI

      10.3389/fpain.2022.979038

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Involvement of Brn3a-positive spinal dorsal horn neurons in the transmission of visceral pain in inflammatory bowel disease model mice2021

    • Author(s)
      Kazuhiko Nishida, Shinji Matsumura, Takuya Kobayashi
    • Journal Title

      bioRxiv

      Volume: 2021.09.06 Pages: 457875-457875

    • DOI

      10.1101/2021.09.06.457875

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Presentation] Analysis of visceral pain transmission in the spinal dorsal horn using a dextran sodium sulfate-induced colitis model2021

    • Author(s)
      西田和彦、松村伸治、小林拓也
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Research-status Report
  • [Presentation] デキストラン硫酸ナトリウム誘導性大腸炎モデルを用いた脊髄後角における内臓痛伝達の解析2021

    • Author(s)
      西田和彦、松村伸治、小林拓也
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 脊髄後角長距離ニューロンの分子マーカーの同定2019

    • Author(s)
      西田和彦、伊藤誠二
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Remarks] 関西医科大学医化学講座

    • URL

      https://kmu-medchem.jp/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 関西医科大学医化学講座

    • URL

      https://kmu-medchem.jp/member/

    • Related Report
      2021 Research-status Report
  • [Remarks] 関西医科大学教員情報

    • URL

      http://research.kmu.ac.jp/kmuhp/KgApp?kyoinId=ykdiio

    • Related Report
      2020 Research-status Report 2019 Research-status Report

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

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