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Unraveling mechanisms of In vivo transmission of aggregated TDP-43 in sporadic ALS

Research Project

Project/Area Number 20H03589
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionNagoya University

Principal Investigator

Yohei Iguchi  名古屋大学, 医学部附属病院, 助教 (80790659)

Co-Investigator(Kenkyū-buntansha) 佐橋 健太郎  名古屋大学, 医学部附属病院, 講師 (90710103)
勝野 雅央  名古屋大学, 医学系研究科, 教授 (50402566)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
KeywordsTDP-43 / protein aggregation / prion-like propagation / ALS / 凝集タンパク質の細胞間伝播 / ニューロン / オリゴデンドロサイト / 筋萎縮性側索硬化症 / 異常タンパク凝集 / TDP-43伝搬 / 凝集タンパク伝播 / オリゴデンデロサイト / TDP-43伝播 / タンパク伝播 / FTLD
Outline of Research at the Start

孤発性筋萎縮性側索硬化症において凝集型TDP-43がニューロン間をプリオンのように伝播することが想定されるが、実際に生体内でこのTDP-43のプリオン様伝播を証明した事例はない。研究代表者らはCre発現マウスとAAV-CMV-FLEXベクターを用いることによりTDP-43の生体内における細胞間伝播を強く示唆する結果を得ている。本研究では凝集型TDP-43の生体内伝播を”確実に”証明し、次にその伝播を修飾する因子を検討しsALSの病態抑止療法への展開を目指す。

Outline of Final Research Achievements

In this study, we used neuron-specific Cre mice and TDP-43-GFP-loaded AAV-Flex vector to express TDP-43 in the mouse brain and spinal cord in a neuron-specific manner and to examine its process of propagation. Overexpression of TDP-43 in the cytoplasm of neurons resulted in extensive TDP-43 expansion in remote areas of fiber communication. Expression of aggregation-prone TDP-43 was found to propagate to oligodendrocytes (OLGs) on the injection side instead of propagating to remote regions. We also confirmed that activation of neural activity promotes this neuron-OLG propagation, suggesting that neural hyperexcitability contributes to the expansion of TDP-43 pathology in ALS.

Academic Significance and Societal Importance of the Research Achievements

多くの孤発性ALS患者は一側肢の筋力低下や筋萎縮、球麻痺といった局所症状で発症し、近接部位に病変が進展していく。本研究でTDP-43がニューロン間やニューロンーオリゴデンドロサイト間を伝播することが動物実験で示された。明確な遺伝的背景を持たない孤発性ALS患者を発症前に診断することは現状では困難であり、診断された時点ではTDP-43凝集は一定の部位で始まっていることが想定されるため、病変の進展を阻止する治療介入はより現実的と考えられ、進行抑止療法の有力な標的となる可能性がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (20 results)

All 2023 2022 2021 2020

All Journal Article (12 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 6 results) Presentation (7 results) Book (1 results)

  • [Journal Article] Neutrophil extracellular traps: from antimicrobial innate immunity to the development of chemotherapy-induced peripheral neuropathy2023

    • Author(s)
      Koike Haruki、Iguchi Yohei、Sahashi Kentaro、Katsuno Masahisa
    • Journal Title

      eBioMedicine

      Volume: 90 Pages: 104526-104526

    • DOI

      10.1016/j.ebiom.2023.104526

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Actin-binding protein filamin-A drives tau aggregation and contributes to progressive supranuclear palsy pathology2022

    • Author(s)
      Tsujikawa K,Hamanaka K, Riku Y, Hattori Y, Hara N, Iguchi Y,Miyata T, Sobue G, Matsumoto N, Sahashi K, Katsuno M, et al.
    • Journal Title

      Sci Adv

      Volume: - Issue: 21 Pages: 1-16

    • DOI

      10.1126/sciadv.abm5029

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impaired disassembly of the axon initial segment restricts mitochondrial entry into damaged axons.2022

    • Author(s)
      Kiryu-Seo S, Matsushita R, Tashiro R, Yoshimura T, Iguchi Y, Katsuno M, Ryosuke Takahashi R, Kiyama H
    • Journal Title

      EMBO J

      Volume: 41 Issue: 20

    • DOI

      10.15252/embj.2021110486

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Significance of Oligomeric and Fibrillar Species in Amyloidosis: Insights into Pathophysiology and Treatment2021

    • Author(s)
      Koike Haruki、Iguchi Yohei、Sahashi Kentaro、Katsuno Masahisa
    • Journal Title

      Molecules

      Volume: 26 Issue: 16 Pages: 5091-5091

    • DOI

      10.3390/molecules26165091

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Blockade of CHRNB2 signaling with a therapeutic monoclonal antibody attenuates the aggressiveness of gastric cancer cells2021

    • Author(s)
      Kanda Mitsuro、Shimizu Dai、Nakamura Shunsuke、Sawaki Koichi、Umeda Shinichi、Miwa Takashi、Tanaka Haruyoshi、Inokawa Yoshikuni、Hattori Norifumi、Hayashi Masamichi、Tanaka Chie、Nakayama Goro、Iguchi Yohei、Katsuno Masahisa、Kodera Yasuhiro
    • Journal Title

      Oncogene

      Volume: 40 Issue: 36 Pages: 5495-5504

    • DOI

      10.1038/s41388-021-01945-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pathway from TDP-43-Related Pathology to Neuronal Dysfunction in Amyotrophic Lateral Sclerosis and Frontotemporal Lobar Degeneration2021

    • Author(s)
      Riku Yuichi、Seilhean Danielle、Duyckaerts Charles、Boluda Susana、Iguchi Yohei、Ishigaki Shinsuke、Iwasaki Yasushi、Yoshida Mari、Sobue Gen、Katsuno Masahisa
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 8 Pages: 3843-3843

    • DOI

      10.3390/ijms22083843

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The wide-ranging clinical and genetic features in Japanese families with valosin-containing protein proteinopathy2021

    • Author(s)
      Ando T, Nakamura R, Kuru S, Yokoi D, Atsuta N, Koike H, Suzuki M, Hara K, Iguchi Y, Harada Y, Yoshida Y, Hattori M, Murakami A, Noda S, Kimura S, Sone J, Nakamura T, Goto Y, Mano K, Okada H, Okuda S, Nishino I, Ogi T, Sobue G, Katsuno M
    • Journal Title

      Neurobiology of Aging

      Volume: 100 Pages: 120.e1-120.e6

    • DOI

      10.1016/j.neurobiolaging.2020.10.028

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exploring the factors underlying remyelination arrest by studying the post‐transcriptional regulatory mechanisms of cystatin F gene2021

    • Author(s)
      Li Jiayi、Durose Wilaiwan Wisessmith、Ito Junko、Kakita Akiyoshi、Iguchi Yohei、Katsuno Masahisa、Kunisawa Kazuo、Shimizu Takeshi、Ikenaka Kazuhiro
    • Journal Title

      Journal of Neurochemistry

      Volume: 157 Issue: 6 Pages: 2070-2090

    • DOI

      10.1111/jnc.15190

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Aggresome formation and liquid?liquid phase separation independently induce cytoplasmic aggregation of TAR DNA-binding protein 432020

    • Author(s)
      Watanabe Seiji、Inami Hidekazu、Oiwa Kotaro、Murata Yuri、Sakai Shohei、Komine Okiru、Sobue Akira、Iguchi Yohei、Katsuno Masahisa、Yamanaka Koji
    • Journal Title

      Cell Death & Disease

      Volume: 11 Issue: 10 Pages: 909-909

    • DOI

      10.1038/s41419-020-03116-2

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Therapeutic monoclonal antibody targeting of neuronal pentraxin receptor to control metastasis in gastric cancer2020

    • Author(s)
      Kanda Mitsuro、Shimizu Dai、Sawaki Koichi、Nakamura Shunsuke、Umeda Shinichi、Miwa Takashi、Tanaka Haruyoshi、Tanaka Chie、Hayashi Masamichi、Iguchi Yohei、Yamada Suguru、Katsuno Masahisa、Kodera Yasuhiro
    • Journal Title

      Molecular Cancer

      Volume: 19 Issue: 1 Pages: 131-131

    • DOI

      10.1186/s12943-020-01251-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] NUS1 mutation in a family with epilepsy, cerebellar ataxia, and tremor2020

    • Author(s)
      Araki Kunihiko、Nakamura Ryoichi、Ito Daisuke、Kato Kohji、Iguchi Yohei、Sahashi Kentaro、Toyama Miho、Hamada Kensuke、Okamoto Nobuhiko、Wada Yoshinao、Nakamura Tomohiko、Ogi Tomoo、Katsuno Masahisa
    • Journal Title

      Epilepsy Research

      Volume: 164 Pages: 106371-106371

    • DOI

      10.1016/j.eplepsyres.2020.106371

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characteristic Features of FUS Inclusions in Spinal Motor Neurons of Sporadic Amyotrophic Lateral Sclerosis.2020

    • Author(s)
      Ikenaka K, Ishigaki S, Iguchi Y, Kawai K, Fujioka Y, Yokoi S, Abdelhamid RF, Nagano S, Mochizuki H, Katsuno M, Sobue G.
    • Journal Title

      J Neuropathol Exp Neurol

      Volume: 79 Issue: 4 Pages: 370-377

    • DOI

      10.1093/jnen/nlaa003

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Monomerization of TDP-43 is a key determinant for inducing TDP-43 pathology in ALS2022

    • Author(s)
      大岩 康太郎, 渡邊 征爾, 小野寺 一成, 井口 洋平, 岡田 洋平, 勝野 雅央, 山中 宏二
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Dysregulated endocannabinoid metabolism is a therapeutic target for amyotrophic lateral sclerosis2022

    • Author(s)
      伊藤 大輔, 橋詰 淳, 山田 晋一郎, 井口 洋平, 岸本 祥之, 鳥居 良太, 飯田 円, 勝野 雅央
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Analysis of visual abnormalities in synucleinopathy2022

    • Author(s)
      天草 善信, 井口 洋平, 横井 聡, 川上 裕, 勝野 雅央
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] In vivo models of pathological TDP-43 transmission2021

    • Author(s)
      井口 洋平, 李 佳益, 天草 善信, 横井 聡, 勝野 雅央
    • Organizer
      第62回日本神経学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Monomerization of TDP-43 is a key determinant for inducing TDP-43 pathology in ALS2021

    • Author(s)
      大岩 康太郎, 渡邊 征爾, 井口 洋平, 勝野 雅央, 山中 宏二
    • Organizer
      第62回日本神経学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ALSのマウスモデルの有用性と特性2020

    • Author(s)
      井口洋平
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Secretion and propagation of TDP-43 as a therapeutic target for ALS.2020

    • Author(s)
      Yohei Iguchi
    • Organizer
      第43回日本神経科学大会 (Neuro2020)
    • Related Report
      2020 Annual Research Report
  • [Book] Pharma Medica2021

    • Author(s)
      井口洋平、勝野雅央
    • Total Pages
      6
    • Publisher
      メディカルビュー社
    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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