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Development of a treatment for recovery from blindness by restructuring the visual pathway

Research Project

Project/Area Number 21K18279
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

HARADA Takayuki  公益財団法人東京都医学総合研究所, 疾患制御研究分野, 参事研究員 (90345306)

Co-Investigator(Kenkyū-buntansha) 行方 和彦  公益財団法人東京都医学総合研究所, 疾患制御研究分野, 副参事研究員 (70392355)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2023: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2022: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2021: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywords視神経再生 / 視機能回復 / 緑内障
Outline of Research at the Start

我が国には160万人を超える視覚障害者が存在する。最大の失明原因である緑内障など、特に視神経の変性疾患については、根本的な治療法がないことが問題になっている。そこで本研究では神経ネットワークの再構築を促進する新たな再生治療法を開発することにより、一旦失明した状態からの視機能の回復を目指す。

Outline of Final Research Achievements

An adeno-associated viral vector (AAV-iTrkB) was created to force expression of the intracellular region of TrkB, a high-affinity receptor for the brain-derived neurotrophic factor (BDNF), at the plasma membrane. Once the vector was administered intraocularly to the mouse model, the progression of glaucoma was suppressed. Furthermore, in an optic nerve crush model, the vector showed a strong regenerative effect that optic nerve axons reached the optic chiasm. On the other hand, in an optic tract transection model, regenerating axons successfully formed pathways to their brain targets, resulting in partial recovery of visual behavior. These results indicate that gene therapy using AAV-iTrkB vector may contribute to the inhibition of the progression of retinal degenerative diseases including glaucoma and the recovery of visual function after visual pathway injury.

Academic Significance and Societal Importance of the Research Achievements

視神経外傷や緑内障などで視神経が変性した場合、現在のところ直接的な治療法は開発されていない。今回作製した遺伝子治療ベクター (AAV-iTrkB)はBDNFの投与を必要としない画期的なものであり、視神経の保護や再生にも強力な効果を示した。この成果は国際的な専門誌において発表済み(Molecular Therapy, 2023)であり、国際特許申請も終えている。またこうした新しい手法は他の網膜・視神経変性疾患の治療にも応用可能であることから、今後も研究を継続する予定である。将来的に本研究の成果を視覚障害となっている患者に還元することができれば、大きな社会的意義を持つことが期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Comments on the Screening Results   Research-status Report
  • Research Products

    (50 results)

All 2025 2024 2023 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (13 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 13 results,  Open Access: 10 results) Presentation (21 results) (of which Int'l Joint Research: 9 results,  Invited: 8 results) Remarks (12 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] Memorial Sloan Kettering Cancer Center(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UCL Institute of Ophthalmology(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Stanford University/Memorial Sloan Kettering Cancer Center(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Asking one mechanism in glial cells during neuroinflammation2025

    • Author(s)
      Guo Xiaoli、Harada Chikako、Harada Takayuki
    • Journal Title

      Neural Regeneration Research

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monogenic gene therapy for glaucoma and optic nerve injury2025

    • Author(s)
      Harada Chikako、Guo Xiaoli、Harada Takayuki
    • Journal Title

      Neural Regeneration Research

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ASK1 activation in glial cells in post-mortem multiple sclerosis tissue2024

    • Author(s)
      Seki E, Guo X, Namekata K, Komori T, Hayashi H, Arai N, Harada T.
    • Journal Title

      Neuropathology

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Drug Treatment Attenuates Retinal Ganglion Cell Death by Inhibiting Collapsin Response Mediator Protein 2 Phosphorylation in Mouse Models of Normal Tension Glaucoma2024

    • Author(s)
      Wang Yuebing、Brahma Musukha Mala、Takahashi Kazuya、Hernandez Alessandra Nolia Blanco、Ichikawa Koki、Minami Syuntaro、Goshima Yoshio、Harada Takayuki、Ohshima Toshio
    • Journal Title

      NeuroMolecular Medicine

      Volume: 26 Issue: 1 Pages: 13-13

    • DOI

      10.1007/s12017-024-08778-1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Drug combination of topical ripasudil and brimonidine enhances neuroprotection in a mouse model of optic nerve injury2024

    • Author(s)
      Namekata Kazuhiko、Noro Takahiko、Nishijima Euido、Sotozono Akiko、Guo Xiaoli、Harada Chikako、Shinozaki Youichi、Mitamura Yoshinori、Nakano Tadashi、Harada Takayuki
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 154 Issue: 4 Pages: 326-333

    • DOI

      10.1016/j.jphs.2024.02.011

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glial cells as a promising therapeutic target of glaucoma: beyond the IOP2024

    • Author(s)
      Shinozaki Youichi、Namekata Kazuhiko、Guo Xiaoli、Harada Takayuki
    • Journal Title

      Frontiers in Ophthalmology

      Volume: 3 Pages: 1-14

    • DOI

      10.3389/fopht.2023.1310226

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neuroprotection and axon regeneration by novel low-molecular-weight compounds through the modification of DOCK3 conformation2023

    • Author(s)
      Namekata Kazuhiko、Tsuji Naoki、Guo Xiaoli、Nishijima Euido、Honda Sari、Kitamura Yuta、Yamasaki Atsushi、Kishida Masamichi、Takeyama Jun、Ishikawa Hirokazu、Shinozaki Youichi、Kimura Atsuko、Harada Chikako、Harada Takayuki
    • Journal Title

      Cell Death Discovery

      Volume: 9 Issue: 1 Pages: 1-8

    • DOI

      10.1038/s41420-023-01460-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vision protection and robust axon regeneration in glaucoma models by membrane-associated Trk receptors.2023

    • Author(s)
      Nishijima E, Honda S, Kitamura Y, Namekata K, Kimura A, Guo X, Azuchi Y, Harada C, Murakami A, Matsuda A, Nakano T, Parada LF, Harada T.
    • Journal Title

      Mol Ther.

      Volume: 31 Issue: 3 Pages: 810-824

    • DOI

      10.1016/j.ymthe.2022.11.018

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of constitutively active K-Ras on axon regeneration after optic nerve injury2023

    • Author(s)
      Kiyota Naoki、Namekata Kazuhiko、Nishijima Euido、Guo Xiaoli、Kimura Atsuko、Harada Chikako、Nakazawa Toru、Harada Takayuki
    • Journal Title

      Neuroscience Letters

      Volume: 799 Pages: 137124-137124

    • DOI

      10.1016/j.neulet.2023.137124

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Astrocytic dysfunction induced by ABCA1 deficiency causes optic neuropathy2022

    • Author(s)
      Shinozaki Youichi、Leung Alex、Namekata Kazuhiko、Saitoh Sei、Nguyen Huy Bang、Takeda Akiko、Danjo Yosuke、Morizawa Yosuke M.、Shigetomi Eiji、Sano Fumikazu、Yoshioka Nozomu、Takebayashi Hirohide、Ohno Nobuhiko、Segawa Takahiro、Miyake Kunio、Kashiwagi Kenji、Harada Takayuki、Ohnuma Shin-ichi、Koizumi Schuichi
    • Journal Title

      Science Advances

      Volume: 8 Issue: 44 Pages: 1081-1081

    • DOI

      10.1126/sciadv.abq1081

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ASK1 signaling regulates phase-specific glial interactions during neuroinflammation2022

    • Author(s)
      Guo Xiaoli、Kimura Atsuko、Namekata Kazuhiko、Harada Chikako、Arai Nobutaka、Takeda Kohsuke、Ichijo Hidenori、Harada Takayuki
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 6

    • DOI

      10.1073/pnas.2103812119

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Genetic inhibition of collapsin response mediator protein‐2 phosphorylation ameliorates retinal ganglion cell death in normal‐tension glaucoma models2022

    • Author(s)
      Brahma Musukha Mala、Takahashi Kazuya、Namekata Kazuhiko、Harada Takayuki、Goshima Yoshio、Ohshima Toshio
    • Journal Title

      Genes to Cells

      Volume: 27 Issue: 8 Pages: 526-536

    • DOI

      10.1111/gtc.12971

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of lighting environment on the degeneration of retinal ganglion cells in glutamate/aspartate transporter deficient mice, a mouse model of normal tension glaucoma2022

    • Author(s)
      Ohashi Tsutomu、Namekata Kazuhiko、Guo Xiaoli、Kimura Atsuko、Harada Chikako、Harada Takayuki
    • Journal Title

      Biochemistry and Biophysics Reports

      Volume: 29 Pages: 101197-101197

    • DOI

      10.1016/j.bbrep.2021.101197

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 改変型神経栄養因子受容体を用いた神経保護および軸索再生治療の可能性2024

    • Author(s)
      西島義道、行方和彦、本田紗里、北村裕太、木村敦子、郭曉麗、安土ゆり子、原田知加子、野呂隆彦、中野匡、原田高幸.
    • Organizer
      第128回日本眼科学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 常時活性型インスリン受容体の遺伝子治療によるシナプス再生と網膜機能回復2024

    • Author(s)
      外園晶子、行方和彦、郭曉麗、篠崎陽一、野呂隆彦、中野匡、原田高幸.
    • Organizer
      第128回日本眼科学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 偽落屑症候群と非偽落屑症候群における前房水中のアミロイドベータ濃度の比較2024

    • Author(s)
      大橋勉、藤谷顕雄、吉田麻衣子、長尾里栄子、原田高幸、行方和彦、小島隆司.
    • Organizer
      第128回日本眼科学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] インスリン受容体の遺伝子治療による網膜神経節細胞の樹状突起再生2023

    • Author(s)
      外園晶子、郭曉麗、行方和彦、野呂隆彦、中野匡、原田高幸.
    • Organizer
      第127回日本眼科学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Dendrite regeneration of retinal ganglion cells by gene therapy using a constitutive active form of insulin receptor2023

    • Author(s)
      Sotozono A, Guo X, Namekata K, Noro T, Nakano T, Harada T.
    • Organizer
      World Glaucoma Congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 改変型インスリン受容体の遺伝子治療による網膜神経保護と視神経再生2023

    • Author(s)
      外園晶子、行方和彦、郭曉麗、篠崎陽一、野呂隆彦、中野匡、原田高幸.
    • Organizer
      第34回日本緑内障学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Neuroprotection and axon regeneration in glaucoma models by gene therapy using modified tyrosine kinase receptors2023

    • Author(s)
      Harada T, Namekata K, Sotozono A, Shinozaki Y, Guo X, Harada C.
    • Organizer
      26th EVER CONGRESS
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 加齢性変化から視機能を守り、再生させる、新しい治療法の開発2023

    • Author(s)
      原田高幸
    • Organizer
      第96回日本生化学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 視神経変性疾患の病態解明と治療研究2023

    • Author(s)
      原田高幸
    • Organizer
      第97回日本薬理学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 神経栄養因子受容体のシグナル伝達経路を活用した神経保護療法の検討2022

    • Author(s)
      原田高幸
    • Organizer
      第33回日本緑内障学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Constitutively active Ras promotes protection and axon regeneration in retinal ganglion cells after optic nerve injury.2022

    • Author(s)
      Kiyota N、Namekata K、Guo X、Kimura A、Nakazawa T、Harada T.
    • Organizer
      ARVO 2022 meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 視神経再生関連因子2021

    • Author(s)
      原田高幸
    • Organizer
      第59回日本神経眼科学会総会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Exploring new glaucoma therapies using animal models.2021

    • Author(s)
      原田高幸
    • Organizer
      第32回日本緑内障学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] AAV-mediated delivery of constitutively active TrkB promotes CNS axon regeneration and neuroprotection.2021

    • Author(s)
      Kimura A, Nishijima E, Kitamura Y, Honda S, Guo X, Harada C, Namekata K, Harada T.
    • Organizer
      Neuroscience Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 活性型TrkBを活用した遺伝子治療による神経保護と軸索再生.2021

    • Author(s)
      行方和彦、西島義道、北村裕太、本田紗里、郭曉麗、木村敦子、原田知加子、原田高幸.
    • Organizer
      第94回日本生化学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Microglial DOCK8 and neurodegeneration.2021

    • Author(s)
      Kimura A, Namekata K, Guo X, Arai N, Harada C, Harada T.
    • Organizer
      The 4th International Conference on Applied Biochemistry and Biotechnology (ABB 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The renin-angiotensin system regulates neurodegeneration in a mouse model of optic neuritis.2021

    • Author(s)
      Guo X, Namekata K, Kimura A, Harada C, Harada T.
    • Organizer
      3rd Annual Global Conference on Neuroscience and Neurology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gene therapy with modified TrkB induces neuroprotection and axon regeneration.2021

    • Author(s)
      Kimura A, Nishijima E, Kitamura Y, Honda S, Guo X, Harada C, Namekata K, Harada T.
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Gene therapy with mutant TrkB receptor protects retinal ganglion cell and retinal function in a mouse model of normal tension glaucoma.2021

    • Author(s)
      Nishijima E, Honda S, Namekata K, Kimura A, Guo X, Harada C, Nakano T, Harada T.
    • Organizer
      World Glaucoma Congress 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gene therapy with mutant TrkB receptors protects retinal neurons and promotes optic nerve regeneration without ligands.2021

    • Author(s)
      Nishijima E, Namekata K, Kimura A, Kitamura Y, Honda S, Guo X, Harada C, Nakano T, Harada T.
    • Organizer
      ARVO 2021 meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pathogenic roles of glial ASK1 signaling in neuroinflammation.2021

    • Author(s)
      Guo X, Kimura A, Namekata K, Harada C, Harada T.
    • Organizer
      ARVO 2021 meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] DOCK3の構造変化を起こす低分子化合物による神経保護と軸索再生

    • URL

      https://www.igakuken.or.jp/retina/topics/topics15.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 緑内障モデルにおいて病態の進行を予防し、視神経を再生する、新しい遺伝子治療ベクター

    • URL

      https://www.igakuken.or.jp/retina/topics/topics14.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 視覚病態プロジェクト

    • URL

      https://www.igakuken.or.jp/retina/index.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 緑内障モデルにおいて病態の進行を予防し、視神経を再生する、新しい遺伝子治療ベクター

    • URL

      https://www.igakuken.or.jp/topics/2022/1208.html

    • Related Report
      2022 Research-status Report
  • [Remarks] Gene therapy using neurotrophin receptor

    • URL

      https://www.igakuken.or.jp/english/topics/2022/e-1208.html

    • Related Report
      2022 Research-status Report
  • [Remarks] ASK1シグナルは神経炎症におけるグリア間相互作用を病期特異的に制御する

    • URL

      https://www.igakuken.or.jp/topics/2022/0201.html

    • Related Report
      2022 Research-status Report
  • [Remarks] ASK1 signaling regulates glial interactions

    • URL

      https://www.igakuken.or.jp/english/topics/2022/e-0201.html

    • Related Report
      2022 Research-status Report
  • [Remarks] 視覚病態プロジェクト

    • URL

      https://www.igakuken.or.jp/project/detail/retina.html

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Remarks] Visual Research Project

    • URL

      https://www.igakuken.or.jp/english/project/detail/retina.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 未来を話そう! プロジェクト研究の紹介

    • URL

      https://www.igakuken.or.jp/project/to-tomin/to-pro26.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 網膜・視神経変性疾患の病態解明と治療法

    • URL

      https://www.igakuken.or.jp/retina/index.html

    • Related Report
      2021 Research-status Report
  • [Remarks] TOPICS「ASK1シグナルは神経炎症におけるグリア間相互作用を病期特異的に制御する」

    • URL

      https://www.igakuken.or.jp/topics/2022/0201.html

    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] インスリン受容体断片をコードする核酸構築物、及びその利用2024

    • Inventor(s)
      行方和彦、原田高幸
    • Industrial Property Rights Holder
      東京都医学総合研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-061682
    • Filing Date
      2024
    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-07-13   Modified: 2025-01-30  

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