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Optical coherence tomographic analysis of the effect of calpain inhibiting peptide on the delay of retinal degeneration

Research Project

Project/Area Number 17K16955
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Ophthalmology
Research InstitutionHirosaki University

Principal Investigator

Takahashi Shizuka  弘前大学, 医学研究科, 客員研究員 (00747925)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords網膜色素変性 / 視細胞死 / カルパイン / 徐放システム / RCSラット / ペプチド療法 / ミトコンドリアカルパイン / ペプチド / 光干渉断層計 / 視細胞 / 薬理学 / 眼科学
Outline of Final Research Achievements

Retinitis pigmentosa is caused by the photoreceptor cell death due to gene mutations, leading to visual disturbances like night blindness and visual field constriction. During the photoreceptor cell death mechanisms, it has been known that calpain, a kind of proteases, becomes activated. This study was aimed to develop a new drug delivery devise which would slowly deliver peptide molecules that specifically inhibit activation of calpain into the eye. The devise was intended to be implanted under the bulbar conjunctiva. In this study, the researcher made a calpain inhibiter devise, and confirmed that it was able to be safely implanted under the RCS rat conjunctival tissue. However, the effect of this devise on the RCS rat photoreceptor protection was not detected. This point became a future point that should be clarified.

Academic Significance and Societal Importance of the Research Achievements

網膜色素変性に対する治療法開発の一環として、視細胞保護により視細胞死の発症を遅延させ、その結果重篤な視覚障害に陥るまでの時間を延長させるという手段があり、本研究は視細胞保護療法の新規開発として位置づけられる。視細胞内でカルパインを持続的に抑制できればその結果として視細胞死の進行を遅延できるという考え方に基づいている。本研究者は所属する研究室で明らかにしたカルパインを特異的に阻害するペプチドを持続的に網膜に到達させることの出来る徐放デバイスを作成してその効果を検討した。本研究によって、薬剤徐放という新規の視細胞保護治療法への新たな研究への方向性が示されたものと思われる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (5 results)

  • [Journal Article] The spectral domain optical coherence tomography findings associated with morphological and electrophysiological changes in a rat model of retinal degeneration, rhodopsin S334twr-4 rats2018

    • Author(s)
      Yamauchi K, Tanabu R, Monai N, Gonome T, Xie Y, Takahashi S, Ishiguro S, Nakazawa M
    • Journal Title

      BioMed Research International

      Volume: 2018 Pages: 1-10

    • DOI

      10.1155/2018/5174986

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The findings of optical coherence tomography of retinal degeneration in relation to the morphological and electroretinographic features in RPE65-/- mice2018

    • Author(s)
      Tanabu R, Sato K, Monai N, Yamauchi K, Gonome T, Xie Y, Takahashi S, Ishiguro S, Nakazawa M
    • Journal Title

      PLOS ONE

      Volume: 14 Issue: 1 Pages: e0210439-e0210439

    • DOI

      10.1371/journal.pone.0210439

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Oxidative stress in the vitreous fluid with rhegmatogenous retinal detachment2017

    • Author(s)
      Suzuki Y, Adachi K, Takahashi S, Maeno A, Nakazawa M
    • Journal Title

      Journal of Clinical and Experimental of Ophthalmology

      Volume: 6 Issue: 05 Pages: 682-686

    • DOI

      10.4172/2155-9570.1000682

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 色素性傍静脈網膜脈絡膜変性4症例の臨床像2019

    • Author(s)
      髙橋 静、工藤朝香、中澤 満
    • Organizer
      第123回日本眼科学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 各種網膜変性モデルでのOCT所見、網膜電図および視細胞形態の関連性2019

    • Author(s)
      中澤 満、安達功武、髙橋 静、毛内奈津姫、山内宏大、田名部玲子、江目孝幸、Xie Yuting、石黒誠一、佐藤孝太
    • Organizer
      第123回日本眼科学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 色素性静脈周囲網脈絡膜萎縮の4症例の臨床的特徴2018

    • Author(s)
      髙橋 静、中澤 満
    • Organizer
      第135回青森眼科集談会
    • Related Report
      2018 Research-status Report
  • [Presentation] ロドプシンP23H変異ラットの網膜変性過程のOCT所見による解析2017

    • Author(s)
      毛内奈津姫、田名部玲子、山内宏大、髙橋 静、安達功武、中澤 満
    • Organizer
      第121回日本眼科学会総会
    • Related Report
      2017 Research-status Report
  • [Presentation] ロドプシンS334ter変異ラット網膜変性過程のOCT所見2017

    • Author(s)
      山内宏大、田名部玲子、毛内奈津姫、髙橋 静、安達功武、中澤 満
    • Organizer
      第121回日本眼科学会総会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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