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Comparison of plasticity between rod and cone visual pathways

Research Project

Project/Area Number 16K11315
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Ophthalmology
Research InstitutionTohoku University

Principal Investigator

Nishiguchi Koji  東北大学, 医学系研究科, 准教授 (30447825)

Co-Investigator(Kenkyū-buntansha) 中澤 徹  東北大学, 医学系研究科, 教授 (30361075)
藤田 幸輔  東北大学, 医学系研究科, 助教 (80708115)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords遺伝子治療 / 可塑性 / 網膜 / 視覚領野 / 網膜変性 / 視覚再建 / 神経科学 / 細胞・組織 / トランスレーショナルリサーチ / 脳・神経 / ウィルス
Outline of Final Research Achievements

Mice defective of Pde6c and Gnat1 resulting in congenital lack of cone and rod function are virtually blind from birth. In this study, we treated mice of different ages by supplementing GNAT1 gene followed by assessment of visual recovery.
As a result, the levels of functional restoration measured at the retina and visual cortex were not significantly different between mice treated at 1M, 3M, and 9M following GNAT1 gene supplementation therapy. Moreover, visual restoration at the level of visual cortex were similar to mice with only Pde6c defect.
The results indicate that rod visual pathway in adult mice retain substantial plasticity.

Academic Significance and Societal Importance of the Research Achievements

近年、先天的に視覚障害をもつ網膜変性症患者に対して、遺伝子治療が試みられている。しかし、この治療では、網膜感度は改善されるが、視力は向上しない。その原因として、視覚の可塑性の欠落が考えられる。本研究では、「先天性網膜変性症に対する治療では、視覚再建に有効な感受性期が、杆体系視覚と錐体系視覚とでは異なる」との仮説を立て、その検証した。その結果、驚くべきことに、成体マウスにおいては、杆体系の視覚は非常に高い可塑性を有することが初めて明らかになった。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Invited: 2 results)

  • [Journal Article] Retained plsticity and substantial recovery of rod-mediated visual acuity at the visual cortex in blind adult mice with retinal dystrophy2018

    • Author(s)
      Nishiguchi KM, Fujita K, Tokashiki N, Komamura H, Takemoto-Kimura S, Okuno H, Bito H, Nakazawa T.
    • Journal Title

      Mol Ther

      Volume: 26 Issue: 10 Pages: 2397-2406

    • DOI

      10.1016/j.ymthe.2018.07.012

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Retained plasticity at the visual cortex and recovery of vision in blind adult mice with retinal dystrophy following gene therapy2019

    • Author(s)
      Koji M. Nishiguchi
    • Organizer
      34th Asia-Pacific Academy of Ophthalmology Congress
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Retained cortical plasticity and full recovery of rod-mediated visual acuity in blind adult mice with retinal dystrophy2018

    • Author(s)
      Koji M. Nishiguchi
    • Organizer
      6th Joint Meeting in Sendai
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Effect of timing of gene therapy to restore rod vision on the rescue effect in blind mice2017

    • Author(s)
      Koji Nishiguchi
    • Organizer
      第121回 日本眼科学会
    • Related Report
      2017 Research-status Report
  • [Presentation] The effect of timing on visual restoration of Gnat1/Pde6c double-knockout mouse through AAV-mediated gene supplementation2017

    • Author(s)
      Koji Nishiguchi
    • Organizer
      ARVO
    • Related Report
      2017 Research-status Report
  • [Presentation] 全盲マウスに対する杆体視覚再建遺伝子治療時期によるレスキュー効果の差2017

    • Author(s)
      西口康二
    • Organizer
      第121回日本眼科学会総会
    • Place of Presentation
      東京(東京国際フォーラム)
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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