• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

New neuronal circuit for itch transmission in the spinal dorsal horn

Research Project

Project/Area Number 19K22500
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 47:Pharmaceutical sciences and related fields
Research InstitutionKyushu University

Principal Investigator

Tsuda Makoto  九州大学, 薬学研究院, 教授 (40373394)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords慢性掻痒 / 脊髄後角神経 / ケモジェネティックス / マウス
Outline of Research at the Start

アトピー性皮膚炎等に伴う慢性的な痒みは,過度の肉体疲労や精神的ストレスを起こし,QOL低下の原因となる。従来,痒みは弱い痛みシグナルで起こるとされ,痒みの神経化学的理解は非常に遅れていた。近年,脊髄後角のガストリン放出ペプチド受容体GRPRが痒みの伝達に重要であることが報告され,現在,脊髄後角の痒みシグナル伝達はGRPRに収束するモデルが主流となっている。しかし,それ以外の痒み伝達経路はまだ明らかになっていない。代表者は最近,慢性掻痒モデルの脊髄後角で発現増加する因子Xを特定した。本研究では,脊髄後角での痒み神経伝達における因子X陽性神経の役割を明らかにし,新しい痒み伝達経路の特定を目指す。

Outline of Final Research Achievements

Itch had long been considered to be caused and transmitted by a weak pain signal, and thus the neurochemical mechanisms of itch remain to be elucidated. In addition, the mechanism of chronic itch associated, for example, with atopic dermatitis is unknown. Therefore, the aim of this study was to investigate the role of a neuronal subset that expresses Factor X (X+ neurons) in the dorsal horn of the spinal cord in acute and chronic itch. We have found that activation of X+ neurons is sufficient to produce itch-related scratching behavior that is independent on a signal via gastrin-releasing peptide receptors. Furthermore, ablation of X+ neurons suppressed itch-related behavior in diverse models of acute and chronic itch. These results indicate that X+ neurons are a new subset that is necessary for spinal itch transmission under physiological and pathological conditions.

Academic Significance and Societal Importance of the Research Achievements

2000年代後半から脊髄後角での痒み選択的な神経伝達と処理機構に関する論文が相次いで報告されたが,いずれもGRP-GRPRシグナルに収束するモデルである。本研究では同シグナルを介さない,新しい痒み伝達神経回路の存在を示唆した点に学術的意義がある。さらに,アトピー性皮膚炎などの慢性掻痒に著効する医薬品はないことから,本研究の成果は画期的な創薬への扉を開く可能性があり,社会的意義もある。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 Other

All Journal Article (9 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] α1A-adrenaline receptors in dorsal horn inhibitory neurons have an inhibitory role in the regulation of chloroquine-induced itch in mice2021

    • Author(s)
      Shiraishi Yuto、Koga Keisuke、Yamagata Ryo、Hatada Izuho、Shiratori-Hayashi Miho、Tsuda Makoto
    • Journal Title

      Molecular Brain

      Volume: 14 Issue: 1 Pages: 55-55

    • DOI

      10.1186/s13041-021-00768-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Astrocytic STAT3 activation and chronic itch require IP3R1/TRPC-dependent Ca2+ signals in mice2021

    • Author(s)
      Shiratori-Hayashi Miho、Yamaguchi Chiharu、Eguchi Kazushi、Shiraishi Yuto、Kohno Keita、Mikoshiba Katsuhiko、Inoue Kazuhide、Nishida Motohiro、Tsuda Makoto
    • Journal Title

      Journal of Allergy and Clinical Immunology

      Volume: 147 Issue: 4 Pages: 1341-1353

    • DOI

      10.1016/j.jaci.2020.06.039

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chronic itchとアストロサイト2021

    • Author(s)
      津田誠
    • Journal Title

      臨床免疫・アレルギー科

      Volume: 75 Pages: 154-158

    • Related Report
      2020 Annual Research Report
  • [Journal Article] かゆみにおけるグリア細胞の働き2021

    • Author(s)
      津田誠
    • Journal Title

      実験医学

      Volume: 39 Pages: 374-379

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Role of reactive astrocytes in the spinal dorsal horn under chronic itch conditions2020

    • Author(s)
      Shiratori-Hayashi M, Tsuda M.
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 144 Issue: 3 Pages: 147-150

    • DOI

      10.1016/j.jphs.2020.07.010

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intrinsic braking role of descending locus coeruleus noradrenergic neurons in acute and chronic itch in mice2020

    • Author(s)
      Koga Keisuke、Shiraishi Yuto、Yamagata Ryo、Tozaki-Saitoh Hidetoshi、Shiratori-Hayashi Miho、Tsuda Makoto
    • Journal Title

      Molecular Brain

      Volume: 13 Issue: 1 Pages: 144-144

    • DOI

      10.1186/s13041-020-00688-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] グリア細胞による痒みの慢性化機構2020

    • Author(s)
      津田誠
    • Journal Title

      ファルマシア

      Volume: 56 Pages: 830-834

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sensitization of spinal itch transmission neurons in a mouse model of chronic itch requires an astrocytic factor.2020

    • Author(s)
      Koga K, Yamagata R, Kohno K, Yamane T, Shiratori-Hayashi M, Kohro Y, Tozaki-Saitoh H, Tsuda M
    • Journal Title

      J Allergy Clin Immunol

      Volume: 145 Issue: 1 Pages: 183-191

    • DOI

      10.1016/j.jaci.2019.09.034

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 痛みと痒みの慢性化とグリア細胞2019

    • Author(s)
      津田誠
    • Journal Title

      実験医学

      Volume: 37 Pages: 103-109

    • Related Report
      2019 Research-status Report
  • [Presentation] Pivotal role of spinal astrocytes in the chronicity of itch2019

    • Author(s)
      Makoto Tsuda
    • Organizer
      International Brain Research Organization (IBRO) World Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 九州大学大学院薬学研究院薬理学分野ホームページ

    • URL

      https://life-innov.phar.kyushu-u.ac.jp/index.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 九州大学大学院薬学研究院ライフイノベーション分野ホームページ

    • URL

      http://life-innov.phar.kyushu-u.ac.jp/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi