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Liquid-solid phase equilibrium of neuronal RNA granules involved in cognitive function and neurodegenerative diseases

Research Project

Project/Area Number 19H03161
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionCenter for Novel Science Initatives, National Institutes of Natural Sciences

Principal Investigator

Shiina Nobuyuki  大学共同利用機関法人自然科学研究機構(新分野創成センター、アストロバイオロジーセンター、生命創成探究, 生命創成探究センター, 准教授 (30332175)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2019: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
KeywordsRNA顆粒 / 液-液相分離 / mRNA / 局所的翻訳 / 神経変性疾患 / TDP-43 / FUS / RNG105 / 液相-固相 / 認知機能 / ダイナミクス / 液-液相分離 / 液相-固相
Outline of Research at the Start

老化や遺伝的要因によって学習・記憶の能力は低下し、神経変性性認知症のリスクは上昇する。本研究では、長期記憶および神経変性疾患との関わりが明らかにされつつある「RNA顆粒」に注目する。まず、マウスの神経初代培養細胞および個体の脳においてRNA顆粒の液相-固相状態を評価できるGFP蛍光イメージング系を確立する。さらに、その系を用いて老化や遺伝子変異による液相-固相平衡状態への影響を解析し、それに伴う翻訳変化および認知機能の変化をマウスで解析する。これらの解析によって、液相-固相平衡を支える分子基盤を明らかにすると共に、液相-固相平衡状態と認知機能及び疾患との関連を明らかにすることを目指す。

Outline of Final Research Achievements

TDP-43 and FUS, which are the causative gene products of neurodegenerative diseases, are thought to cause diseases by accumulating and aggregating in RNA granules in neurons. In this study, we found that the accumulation of TDP-43 and FUS in RNA granules increased the fluidity of an RNA granule scaffold protein RNG105 in the granules, causing RNG105 to dissociate from the granules into the cytoplasm. Simultaneously, the amount of mRNA uptake into the granules was reduced, and the local translation in the granules was also reduced. These results provide a new model that dissociation of RNG105 from RNA granules by TDP-43 and FUS, and concomitant dissociation of mRNA and the reduced local translation within the granules, are the basis of the pathology of neurodegenerative diseases.

Academic Significance and Societal Importance of the Research Achievements

RNA顆粒は、RNA結合タンパク質とmRNAの液-液相分離によって形成され、シナプスへのmRNA輸送と局所的翻訳の制御を介してシナプス長期増強及び長期記憶に必須の役割を担う。このことから、TDP-43及びFUSの凝集化によるRNA顆粒の機能不全が、シナプス形成不全や認知症を伴う神経変性疾患の病態基盤になると考えられており、そのメカニズム解明は喫緊の課題である。本研究は、RNA顆粒形成因子のほとんどがTDP-43及びFUSの影響を受けない反面、RNG105が特異的に顕著な影響を受け、同時にRNA顆粒の機能が低下することを見出した。この成果は神経変性疾患の新たな病態メカニズムを提案するものである。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (19 results)

All 2021 2020 2019 Other

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 3 results,  Invited: 7 results) Remarks (1 results)

  • [Journal Article] 神経RNA顆粒のダイナミクス制御と高次脳機能2021

    • Author(s)
      椎名伸之
    • Journal Title

      実験医学

      Volume: 39 Pages: 1558-1565

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Implications of RNG140 (caprin2)-mediated translational regulation in eye lens differentiation2020

    • Author(s)
      Kaori Nakazawa, Yuichi Shichino,Shintaro Iwasaki, and Nobuyuki Shiina
    • Journal Title

      Journal of Biological Chemistry

      Volume: 295 Issue: 44 Pages: 15029-15044

    • DOI

      10.1074/jbc.ra120.012715

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seasonal changes in NRF2 antioxidant pathway regulates winter depression-like behavior2020

    • Author(s)
      Nakayama T, Okimura K, Shen J, Guh Y-J, Tamai K, Shimada A, Minou S, Okushi Y, Shimmura T, Furukawa Y, Kadofusa N, Sato A, Nishimura T, Tanaka M, Nakayama K, Shiina N, Yamamoto N, Loudon A.S, Nishiwaki-Ohkawa T, Shinomiya A, Nabeshima T, Nakane Y, and Yoshimura T
    • Journal Title

      PNAS

      Volume: - Issue: 17 Pages: 1-10

    • DOI

      10.1073/pnas.2000278117

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cataloguing and selection of mRNAs localized to dendrites in neurons and regulated by RNA-binding proteins in RNA granules2020

    • Author(s)
      Rie Ohashi and Nobuyuki Shiina
    • Journal Title

      Biomolecules

      Volume: 10 Issue: 2 Pages: 167-167

    • DOI

      10.3390/biom10020167

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] More Dynamic, More Quantitative, Unexpectedly Intricate: Advanced Understanding on Synaptic RNA Localization in Learning and Memory2020

    • Author(s)
      Rohini R, Nobuyuki S, Wang DO*.
    • Journal Title

      Neurobiol Learn and Mem

      Volume: 168 Pages: 107149-107149

    • DOI

      10.1016/j.nlm.2019.107149

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Novel regulation of RNA granule dynamics by neurodegenerative disease-causing gene products2021

    • Author(s)
      堀尾朋世、椎名伸之
    • Organizer
      第44回日本神経科学大会 / CJK第1回国際会議
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Novel regulation of RNA granule dynamics by neurodegenerative disease-causing gene products2021

    • Author(s)
      堀尾朋世、椎名伸之
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脳神経機能における 相分離RNA顆粒の役割2020

    • Author(s)
      椎名伸之
    • Organizer
      日本植物学会第84回大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Role of Intrinsically Disordered Region (IDR) in higher-order brain functions2020

    • Author(s)
      椎名伸之
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 神経変性疾患の原因遺伝子産物による新規RNA顆粒ダイナミクス制御の解析2020

    • Author(s)
      堀尾朋世、椎名伸之
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] RNG105 (caprin1) establishes dendritic mRNA localization and is essential for long-term memory formation2019

    • Author(s)
      Nobuyuki Shiina
    • Organizer
      第42回 日本神経科学大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Liquid- and solid-like RNA granule formation and its implications for neuronal functions2019

    • Author(s)
      Nobuyuki Shiina
    • Organizer
      Frontier Bioorganization Forum 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Dendritic localization of mRNAs for Arf GEFs and GAPs that are involved in spine formation/maturation and AMPAR surface expression in dendrites2019

    • Author(s)
      Rie Ohashi, Yoshitaka Kumori, and Nobuyuki Shiina
    • Organizer
      第42回 日本神経科学大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Regulation of the dynamics of RNA granule condensates and its implications for long-term memory2019

    • Author(s)
      Nobuyuki Shiina
    • Organizer
      NIBB-Princeton Joint Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ストレス顆粒形成促進因子NFAR2の天然変性領域が担う液-液相分離の生理的意義の解析2019

    • Author(s)
      山下映, 藤井一希, 腰高由美恵, 安達真由美, 笹川恵理, 中川真一, 高雄啓三, 椎名伸之
    • Organizer
      第42回 日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] RNG140 (caprin2) はeIF3と複合体を形成して翻訳を抑制する2019

    • Author(s)
      中沢香織, 七野悠一, 岩崎信太郎, 椎名伸之
    • Organizer
      第42回 日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] RNA granule protein RNG105 (caprin1) regulates dendritic mRNA localization and contributes to synaptic potentiation2019

    • Author(s)
      Rie Ohashi, Kei Nakayama, Keizo Takao, and Nobuyuki Shiina
    • Organizer
      第42回 日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] RNA顆粒足場タンパク質による液相・固相RNA顆粒の形成及びその長期記憶との関連2019

    • Author(s)
      椎名伸之
    • Organizer
      第42回 日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Remarks] 目の水晶体(レンズ)形成におけるタンパク質合成制御の仕組みを発見

    • URL

      https://www.nibb.ac.jp/pressroom/news/2020/10/02.html

    • Related Report
      2020 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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