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The synaptic remodeling in the inner retina is possible to treat the glaucoma

Research Project

Project/Area Number 20K18379
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56060:Ophthalmology-related
Research InstitutionOsaka University

Principal Investigator

Kawashima Rumi  大阪大学, 大学院医学系研究科, 助教 (00843616)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords網膜内層シナプス / シナプスリモデリング / 緑内障 / 網膜シグナル伝達 / 短波長 / 接着分子 / 高眼圧モデルマウス
Outline of Research at the Start

まず発現プロファイルを網羅解析するためNecl-1-EGFPマウスを作成して網膜を単細胞まで分離しフローサイトメーターで濃縮した後にSingle cell analysis により発現プロファイルを作成し、すでに先行研究で報告されているデータベースを基に発現細胞種を網羅的に取得する。同定できた細胞種の特異抗体を用いてタンパク発現レベルでの確認を行う。さらにWT, KOマウス各々において高眼圧負荷モデルを作成し高解像度顕微鏡や広域電子顕微鏡によるシナプス形態変化、網膜電図や二光子顕微鏡による機能変化の比較解析を行う。これによりIPLにおけるシナプス異常とリモデリングを検出する。

Outline of Final Research Achievements

In this study, we reported that Necl-1, an adhesion molecule abundant in the mouse retina, was important for synapse formation and transmission of cone OFF pathway among short-wavelength light-induced signaling pathways and was involved in the regulation of mouse eye movements. In addition, we have performed a sub-analysis of the single cell analysis previously reported and established a method to morphologically analyze the distribution of Necl-1-expressing cells in the retina in three dimensions. We succeeded in creating transient ocular hypertension mice as a model for glaucoma, but we did not reach the point of analyzing synapses in the inner retinal layers in the model mice.

Academic Significance and Societal Importance of the Research Achievements

慢性視神経変性疾患である緑内障は眼圧という圧負荷によって網膜内層が障害され視神経が障害される疾患であり日本の途中失明原因の1位である。網膜に存在する接着分子であるNecl-1はシグナル伝達におけるOFF経路に重要な役割を持つ。さらに近年緑内障モデル動物において網膜神経節細胞死が起こる前に網膜内層の1つである内網状層 (IPL)のOFF層が先行して障害されOFF型網膜神経節細胞が眼圧依存性にシナプス可塑性を持つことが報告された。本研究ではNecl-1を用いて高眼圧負荷時における修復再生に関わる分子基盤を解明することで初期緑内障におけるシナプスリモデリングの病態解明に挑んだ。

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

    (8 results)

All 2024 2023 2022 2021 2020

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

  • [Journal Article] Necl-1/CADM3 regulates cone synapse formation in the mouse retina2024

    • Author(s)
      Kawashima Rumi、Matsushita Kenji、Mandai Kenji、Sugita Yuko、Maruo Tomohiko、Mizutani Kiyohito、Midoh Yoshihiro、Oguchi Akiko、Murakawa Yasuhiro、Kuniyoshi Kazuki、Sato Ryohei、Furukawa Takahisa、Nishida Kohji、Takai Yoshimi
    • Journal Title

      iScience

      Volume: 27 Issue: 4 Pages: 109577-109577

    • DOI

      10.1016/j.isci.2024.109577

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Getting a Peek at the Angle of a Patient with Severe Keratoconus.2022

    • Author(s)
      Kawashima R, Matsushita K, Ohnuma K, Maeda N, Koh S, Nishida K.
    • Journal Title

      Frontiers In Ophthalmology.

      Volume: _

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Barium-induced toxic anterior segment syndrome2021

    • Author(s)
      Matsushita Kenji、Kawashima Rumi、Hashida Noriyasu、Hamano Yuki、Harada Kazuo、Higashisaka Kazuma、Baba Koichi、Sato Shigeru、Huang Weiran、Matsumoto Hiroshi、Hamanaka Teruhiko、Quantock Andrew J.、Nishida Kohji
    • Journal Title

      European Journal of Ophthalmology

      Volume: 1 Issue: 3 Pages: 1-5

    • DOI

      10.1177/11206721211069223

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intraocular Endoscopy Resolved Tube Occlusion of an Ahmed Glaucoma Valve2021

    • Author(s)
      Kawashima Rumi、Baba Keita、Matsushita Kenji、Soma Takeshi、Kurashige Masako、Umeda Daisuke、Nakamura Makoto、Morii Eiichi、Nishida Kohji
    • Journal Title

      Case Reports in Ophthalmology

      Volume: 12 Issue: 2 Pages: 706-711

    • DOI

      10.1159/000518286

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Efficacy and safety of 5-fluorouracil in infrared monitor guided bleb revision2021

    • Author(s)
      Kawashima Rumi、Matsushita Kenji、Kawasaki Ryo、Nishida Kohji
    • Journal Title

      BMC Ophthalmology

      Volume: 21 Issue: 1 Pages: 75-82

    • DOI

      10.1186/s12886-021-01843-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prognostic factors for successful Baerveldt glaucoma implant surgery for refractory glaucoma after multiple surgeries2021

    • Author(s)
      Matsushita Kenji、Kawashima Rumi、Kawasaki Ryo、Nishida Kohji
    • Journal Title

      Japanese Journal of Ophthalmology

      Volume: 65 Issue: 6 Pages: 820-826

    • DOI

      10.1007/s10384-021-00864-2

    • NAID

      40022737478

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Assessment of a self-assembling peptide gel, SPG-178, in providing a clear operative field for trabeculectomy surgery for glaucoma in an animal model2020

    • Author(s)
      Matsushita Kenji、Kawashima Rumi、Uesugi Koji、Okada Haruka、Sakaguchi Hirokazu、Quantock Andrew J.、Nishida Kohji
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11326-11326

    • DOI

      10.1038/s41598-020-68171-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Necl-1/CADM3のマウス網膜における青色色覚シナプス形成への関与2023

    • Author(s)
      河嶋瑠美
    • Organizer
      第127回 日本眼科学会
    • Related Report
      2023 Annual Research Report

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

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