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A novel mechanism of astrocyte STAT3 activation and its pathophysiological role

Research Project

Project/Area Number 19K16260
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionKyushu University

Principal Investigator

Shiratori-Hayashi Miho  九州大学, 薬学研究院, 助教 (20735641)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords痒み / 慢性的な痒み / アストロサイト / 脊髄 / STAT3 / カルシウム / 慢性掻痒
Outline of Research at the Start

アストロサイトは、外傷や脳虚血、多発性硬化症、アルツハイマー病などの神経傷害時に主に転写因子STAT3を介して長期的に活性化することで、病態形成や進行・維持に関与する。申請者らの最近の研究から、アストロサイトSTAT3は神経傷害だけでなく末梢炎症でも活性化し、病態の進行・維持に関わることがわかった。しかし、従来活性化の持続時間が短いことが知られているSTAT3がなぜアストロサイトで長期間にわたり持続的に活性化するのかは不明であった。そこで本研究では、アストロサイトSTAT3の持続的活性化機構と病態での役割について、初代培養アストロサイトや慢性掻痒モデルマウスやなどを用いて解明する。

Outline of Final Research Achievements

Spinal astrocyte selective IP3R1 knockdown suppressed persistent STAT3 activation, chronic itch and expression of lipocalin-2 (LCN2), an astrocytic STAT3-dependent factor that is required for chronic itch. IL-6-induced IP3R1-dependent astrocytic Ca2+ responses were long-lasting and involved Ca2+ influx through the TRPC channel. Pharmacologic spinal TRPC inhibition attenuated LCN2 expression and chronic itch. IL-6 expression was upregulated in DRG neurons in a mouse model of chronic itch. DRG neuron-selective IL-6 knockdown also attenuated LCN2 expression and chronic itch.

Academic Significance and Societal Importance of the Research Achievements

本研究によって従来のSTAT3活性化に寄与するシグナルとは異なるカルシウムシグナルとの関連が初めて明らかになったことで,慢性掻痒だけでなく,STAT3の長期的活性化が認められる様々な中枢神経疾患の病態メカニズムのさらなる理解に繋がった。さらに,アストロサイトのSTAT3の長期的活性化には,従来アストロサイトのカルシウムシグナルにおいて重要であると示唆されてきたIP3R2ではなく,IP3R1が選択的に寄与することがわかり,アストロサイトのカルシウムシグナルの新たな一面が明らかになった。

Report

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

    (14 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [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] 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] 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
      2020 Annual Research Report 2019 Research-status 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] 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
  • [Presentation] 痒みの神経基盤とグリア細胞2020

    • Author(s)
      白鳥 美穂
    • Organizer
      第1回 アトピー性皮膚炎痒みコンセンサス会議
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 慢性掻痒におけるアストロサイト活性化機構とその役割2020

    • Author(s)
      白鳥 美穂
    • Organizer
      第63回 日本神経化学会大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 痒みの神経基盤とグリア細胞2019

    • Author(s)
      白鳥 美穂
    • Organizer
      順天堂医学研究所・順天堂かゆみ研究センター 第5回 学術シンポジウム
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Mechanism underlying STAT3 activation in astrocytes under chronic itch conditions2019

    • Author(s)
      Miho Shiratori-Hayashi, Chiharu Yamaguchi, Kazushi Eguchi, Honami Toyonaga, Makoto Tsuda
    • Organizer
      48th NAITO CONFERENCE
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Excitatory synaptic responses in GRPR+ dorsal horn neurons are increases in a mouse model of atopic dermatitis2019

    • Author(s)
      Kensho Kanehisa, Keisuke Koga, Shiori Fujii, Miho Shiratori-Hayashi, Makoto Tsuda
    • Organizer
      48th NAITO CONFERENCE
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sensitization of GRPR-expressing dorsal horn neurons under chronic itch condition requires astrocyte-derived signaling2019

    • Author(s)
      Keisuke Koga, Ryo Yamagata, Miho Shiratori-Hayashi, Makoto Tsuda
    • Organizer
      48th NAITO CONFERENCE
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Activated astrocytes in the spinal dorsal horn facilitate itch transmission in a mouse model of contact dermatitis.2019

    • Author(s)
      Keisuke Koga, Ryo Yamagata, Miho Shiratori-Hayashi, Makoto Tsuda
    • Organizer
      Neuro 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 慢性掻痒モデルマウスでは脊髄後角GRPR陽性神経への興奮性シナプス入力が増大する2019

    • Author(s)
      兼久 賢章、古賀 啓祐、白鳥-林 美穂、津田 誠
    • Organizer
      生体機能と創薬シンポジウム2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 慢性掻痒時の活性化アストロサイトによる痒み増強メカニズム2019

    • Author(s)
      山方涼、古賀啓祐、白鳥美穂、津田誠
    • Organizer
      第36回日本薬学会九州支部大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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