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Elucidation of novel quality control of RNA processing and its related diseases in the nervous system

Research Project

Project/Area Number 20H03344
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionTokai University

Principal Investigator

Iijima Takatoshi  東海大学, 医学部, 准教授 (90383702)

Co-Investigator(Kenkyū-buntansha) 田中 正視  東海大学, 医学部, 客員講師 (50706182)
甲斐田 大輔  富山大学, 学術研究部医学系, 准教授 (60415122)
三上 克央  東海大学, 医学部, 准教授 (90548504)
飯島 陽子  東海大学, 医学部, 特定研究員 (50451860)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2022: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Keywordsスプライシング / RNA / シナプス / RNA結合タンパク質 / スプライシングエラー / 3'UTR / Sam68 / U1 snRNP / Pcdh15 / RNA品質管理 / トランスクリプトーム / 神経細胞 / 脳神経疾患 / 品質管理
Outline of Research at the Start

RNAスプライシングは生命情報多様性を獲得する重要な仕組みであり、脳高次機能発現のための基本的要素である多様な神経回路の形成や可塑性に不可欠な分子基盤である。一方で、高等動物で複雑化したスプライシング活動が適切に行われるためのエラー防止の仕組みやその重要性についてはほとんど理解されていない。本研究課題では、脳機能を守る分子制御として、神経系における「トランスクリプトーム品質管理」のメカニズムと生理意義を解明する。主なマシナリーと考えられるRNA結合タンパク質SAM68とU1 snRNPに焦点を当て、さらにその破綻によって起こる動物個体レベルでの行動変容から脳神経疾患との関連性について検証する。

Outline of Final Research Achievements

RNA splicing is the powerful mechanism for the diversification of biological information and produces a huge number of RNA variants in mammal. While the higher complexity of RNA splicing during evolution could cause a lot of processing errors, the mechanism underlying quality control during the splicing process is not understood.
Importantly, we have recently uncovered an interesting mechanism that prevents prematuration of pre-mRNAs in the nervous system: the RNA-binding protein SAM68 is one of its major machineries, and we have shown that dysregulation of this mechanism can reflect abnormalities in developmental and psychiatric disorders, primarily affecting the maintenance of synapse formation and function.

Academic Significance and Societal Importance of the Research Achievements

進化の過程で飛躍的に高度化したスプライシング制御は一体どのように適切に管理維持されているのであろうか? なぜなら、スプライシング活動の高度化は同時にその過程の複雑化を招き、特に高等動物では非常に長くなったイントロンがなぜどのようにエラーを起こさず正確にプロセスされるのか、膨大なトランスクリプトームの品質管理のメカニズムについては未解明な部分が多かった。本課題における成果は、脳機能を守る分子基盤としてのトランスクリプトーム品質管理のメカニズムと生理学的重要性の一旦を解明し、生物の遺伝情報多様化の謎の仕組みの理解に貢献できたと信じる。

Report

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

    (10 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (3 results) (of which Invited: 1 results)

  • [Int'l Joint Research] Dept. of pharmaceutical Science/University of Cairo(エジプト)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Biozentrum/University of Basel(スイス)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] SAM68-regulated ALE selection of Pcdh15 maintains proper synapse development and function2023

    • Author(s)
      Darwish Mohamed、Ito Masatoshi、Takase Akinori、Ayukawa Noriko、Suzuki Satoko、Tanaka Masami、Iijima Yoko、Iijima Takatoshi
    • Journal Title

      BioRxiv

      Volume: -

    • DOI

      10.1101/2023.04.04.535307

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Inositol pyrophosphate profiling reveals regulatory roles of IP6K2-dependent enhanced IP7 metabolism in the enteric nervous system2023

    • Author(s)
      Masatoshi Ito, Natsuko Fujii, Saori Kohara, Shuho Hori, Masayuki Tanaka, Christopher Wittwer, Kenta Kikuchi, Takatoshi Iijima, Yu Kakimoto, Kenichi Hirabayashi, Daisuke Kurotaki, Henning J Jessen, Adolfo Saiardi, Eiichiro Nagata
    • Journal Title

      Journal of Biological Chemistry

      Volume: 299 (3) Issue: 3 Pages: 102928-102928

    • DOI

      10.1016/j.jbc.2023.102928

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Neuronal alternative splicing2022

    • Author(s)
      飯島 崇利
    • Journal Title

      生化学

      Volume: 94 Issue: 6 Pages: 852-860

    • DOI

      10.14952/SEIKAGAKU.2022.940852

    • ISSN
      0037-1017
    • Year and Date
      2022-12-25
    • Related Report
      2022 Annual Research Report
  • [Journal Article] Neuron-derived neurotrophic factor protects against dexamethasone-induced skeletal muscle atrophy2022

    • Author(s)
      Ozaki Yuta、Ohashi Koji、Otaka Naoya、Ogawa Hayato、Kawanishi Hiroshi、Takikawa Tomonobu、Fang Lixin、Tatsumi Minako、Takefuji Mikito、Enomoto Takashi、Darwish Mohamed、Iijima Yoko、Iijima Takatoshi、Murohara Toyoaki、Ouchi Noriyuki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 593 Pages: 5-12

    • DOI

      10.1016/j.bbrc.2022.01.028

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Distinct Expression of SLM2 Underlies Splicing-Dependent Trans-Synaptic Signaling of Neurexin Across GABAergic Neuron Subtypes2022

    • Author(s)
      Sato Yuji、Iijima Yoko、Darwish Mohamed、Sato Tadayuki、Iijima Takatoshi
    • Journal Title

      Neurochemical Research

      Volume: 47 Issue: 9 Pages: 2591-2601

    • DOI

      10.1007/s11064-021-03384-0

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 神経活動をトリガーする軸索起始部の構造とダイナミクスの理解2022

    • Author(s)
      飯島崇利
    • Organizer
      日本神経化学会大会, 奈良(オンライン開催)公募シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 神経活動をトリガーする軸索起始部の構造とダイナミクスの理解2021

    • Author(s)
      飯島崇利
    • Organizer
      2021年度日本神経化学会大会(オンライン)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Neuronal Alternative Pre-mRNA Splicing: A Key Mechanism for Synaptic and Axonal Plasticity2021

    • Author(s)
      Takatoshi Iijima
    • Organizer
      Young investigator’s Research Seminar at University of Tsukuba
    • Related Report
      2021 Annual Research Report
    • Invited

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

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