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Morphological and molecular analysis of glial plasticity in development and senescence of cutaneous mechanoreceptors

Research Project

Project/Area Number 20K07236
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48010:Anatomy-related
Research InstitutionHokkaido University

Principal Investigator

Takahashi-Iwanaga Hiromi  北海道大学, 医学研究院, 特任准教授 (30193759)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords細胞組織化学 / 皮膚感覚装置 / グリア可塑性 / 終末シュワン細胞 / プリン作動性信号 / 組織細胞化学 / 星形シュワン様細胞 / 終末シュワン細胞, / 細胞動態
Outline of Research at the Start

皮膚感覚装置のグリアである終末シュワン細胞とその周辺に常在する星形シュワン様細胞が成長などに応じた感覚装置の生理的改築に関わる,との仮説を検証する目的で,①ラット頬ひげ毛包丸ごと免疫染色標本の共焦点顕微鏡立体再構築による星形シュワン様細胞と終末シュワン細胞の動態解析,②2型のグリア細胞とその中間型の微細形態,特に相互接着と結合組織との関連の解析,③グリアが緑色蛍光を発する遺伝子改変ラットからセルソーターで分離した感覚装置グリア細胞での機能分子特に受容体の遺伝子発現解析,④頬ひげ毛包局所への受容体遮断剤投与効果の組織学的解析,を行う。

Outline of Final Research Achievements

The lanceolate sensory endings innervating the rat vibrissae accompany the terminal Schwann cells that form glial coverings of axon endings, and the stellate Schwann-like cells. To test transformability of the latter cells into the former for normal mechanoreceptor remodeling in young and aged rats, and to clarify cell signals involved, we observed the two glial cell types by panoramic confocal microscopy of the hair follicle, examined cellular expression of receptors by Ca2+ imaging in isolated specimens, and analyzed effects of the receptor blockade by in vivo experiments. The stellate Schwann-like cells existed in all the hair follicles examined up to 16 months of age, and displayed morphological features suggestive of transformation into terminal Schwann cells frequently in younger rats. The two glial cell types expressed the ATP receptor subtype P2Y2, with the receptor blockade during the fourth postnatal week blunting the glial cell recruitment to the mature sensory endings.

Academic Significance and Societal Importance of the Research Achievements

個体の成長や細胞の新旧回転に応じた改築を常に必要とする感覚終末で,そのグリア要素である終末シュワン細胞が細胞分裂を伴わず日常的に動員され星形シュワン様細胞が動員のための予備軍をなすこと,軸索終末から興奮依存性に放出されるという信号物質ATPの受容体P2Y2を介した細胞応答が予備軍の維持・動員に欠かせないことを初めて明らかにした。これによって,末梢神経系の発達・修復機構解明に新しい視点を提供した。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Anatomical background of the sensory function in the urethra: involvement of endocrine paraneurons and afferent nerves in divergent urogenital functions. A review2022

    • Author(s)
      Iwanaga T、Takahashi-Iwanaga H
    • Journal Title

      Biomedical Research

      Volume: 43 Issue: 6 Pages: 187-199

    • DOI

      10.2220/biomedres.43.187

    • ISSN
      0388-6107, 1880-313X
    • Year and Date
      2022-12-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structure and barrier functions of the perineurium and its relationship with associated sensory corpuscles: A review2022

    • Author(s)
      Iwanaga T、Takahashi-Iwanaga H、Nio-Kobayashi J、Ebara S
    • Journal Title

      Biomedical Research

      Volume: 43 Issue: 5 Pages: 145-159

    • DOI

      10.2220/biomedres.43.145

    • ISSN
      0388-6107, 1880-313X
    • Year and Date
      2022-10-14
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss of CAPS2/Cadps2 leads to exocrine pancreatic cell injury and intracellular accumulation of secretory granules in mice2022

    • Author(s)
      Sato Y、Tsuyusaki M、Takahashi-Iwanaga H、Fujisawa R、Masamune A、Hamada S、Matsumoto R、Tanaka Y、Kakuta Y、Yamaguchi-Kabata Y、Furuse T、Wakana S、Shimura T、Kobayashi R、Shinoda Y、Goitsuka R、Maezawa S、Sadakata T、Sano Y、Furuichi T
    • Journal Title

      Frontiers in Molecular Biosciences

      Volume: 9 Pages: 1-18

    • DOI

      10.3389/fmolb.2022.1040237

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Disposal of intestinal apoptotic epithelial cells and their fate via divergent routes.2022

    • Author(s)
      Iwanaga T, Takahashi-Iwanaga H
    • Journal Title

      Biomed Res

      Volume: 印刷中

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 星形シュワン様細胞による感覚終末の成熟後改築 とくにプリン作動性信号の役割について2024

    • Author(s)
      岩永 ひろみ
    • Organizer
      第129回 日本解剖学会総会・全国学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ca2+ signals mediated by P2Y2 receptors in stellate Schwann-like cells are localized about the ciliary pocket and required for maintenance of the cells and their recuitment to vibrissal mechanoreceptors in young adult rats.2023

    • Author(s)
      Takahashi-Iwanaga H, Iwanaga T
    • Organizer
      XVI European Meeting on Glial cells in Health and Disease
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 形態成熟したラット頬ひげ動き受容器へのグリア細胞の動員 ―とくにプリン作動性刺激の役割について ―2023

    • Author(s)
      岩永ひろみ
    • Organizer
      第126回日本解剖学会全国学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Ca2+ signals mediated by P2Y2 receptors in stellate Schwann-like cells are localized about the ciliary pocket and required for maintenance of the cells and their recruitment to vibrissal mechanoreceptors in young adult rats.2023

    • Author(s)
      Takahashi-Iwanaga H, Iwanaga T
    • Organizer
      XVI European Meeting on Glial cells in Health and Disease
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ラット頬ひげ動き受容器周辺への星形シュワン様細胞の分布にはたすプリン作動性信号の役割について2022

    • Author(s)
      岩永ひろみ
    • Organizer
      第68回日本解剖学会東北・北海道連合支部学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] ラット頬ひげ毛包丸ごと標本でみた星形シュワン様細胞の分布2022

    • Author(s)
      岩永ひろみ
    • Organizer
      第127回 日本解剖学会全国学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] ラット頬ひげ槍型感覚終末に随伴する星型シュワン様細胞の細胞外シグナル制御キナーゼ 1/2(ERK)はプリン受容体P2Y2を介し活性化される2021

    • Author(s)
      岩永ひろみ
    • Organizer
      第126回 日本解剖学会全国学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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