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Studies on regulatory mechanisms of newly identified intracellular proteolytic pathway

Research Project

Project/Area Number 21K15367
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionOsaka University

Principal Investigator

Fujiwara Yuuki  大阪大学, 大学院連合小児発達学研究科, 助教 (90794925)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords細胞内分解 / 細胞内恒常性 / 細胞内代謝 / リソソーム / オートファジー / 非典型オートファジー / DUMP / プロテオスタシス / 細胞内分解系 / 恒常性 / プロテオリシス
Outline of Research at the Start

生体の恒常性維持において、リソソームによる細胞内タンパク質分解は必須である。申請者は最近、細胞内タンパク質をリソソーム内腔へと直接運び込み分解する新たな仕組みおよびその重要因子を発見し、報告している (Fujiwara et. al., bioRxiv, 2020.)。本研究課題では、この細胞内新規タンパク質分解経路の制御機構の解明および、そこから見出される新規経路の生理的・病態生理的意義の解明を目的とし、in vitroから培養細胞系、動物個体レベルの解析までを組み合わせ、研究を行う。

Outline of Final Research Achievements

Lysosomes are the largest site of degradation of intracellular substances, and disruption of lysosomal degradation of macromolecules is known to cause various diseases. The recipient (Yuuki Fujiwara) has previously discovered and reported DUMP, a novel mechanism by which lysosomes directly import nucleic acids and proteins into their lumen for degradation. In this research project, the recipient has published one original paper in 2022 as first author on data suggesting that DUMP or its key factor SIDT2 is involved in neurodegenerative diseases, and has also found that LAMP2C and SIDT2, key factors in nucleic acid uptake, are both induced as downstream components of innate immune responses, and currently submitting papers as first and co-corresponding author.

Academic Significance and Societal Importance of the Research Achievements

本課題は採用者らが独自に発見・報告してきた新たな細胞内分解経路について、その制御機構や生理的・病態生理的意義を明らかにし、研究を一歩伸展させる試みである。このような未開拓の対象について、世界に先駆けそれらを解明する事は、細胞内分解系に関する基礎研究の土台を築く上でも、将来的な医療等への応用を通じた研究の社会への還元のためにも不可欠である。今回の研究でDUMP/SIDT2と神経変性疾患の関わりが示唆されたのに加え、採用者らはDUMPの破綻が家族性神経・筋疾患をもたらすことも見出している。このような観点からも本課題の成果は医学的に見ても将来的に広範な疾患の理解に向けた手がかりとなりうる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (17 results)

All 2023 2022

All Journal Article (9 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] Nucleic acid uptake occurs independent of lysosomal acidification but dependent on ATP consumption during RNautophagy/DNautophagy2023

    • Author(s)
      Contu Viorica Raluca、Sakai Ryohei、Fujiwara Yuuki、Kabuta Chihana、Wada Keiji、Kabuta Tomohiro
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 644 Pages: 105-111

    • DOI

      10.1016/j.bbrc.2022.12.090

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 非典型オートファジーの研究から見える生体恒常性の姿 ―新たな細胞内分解経路のメカニズムと病態生理的意義2023

    • Author(s)
      藤原悠紀
    • Journal Title

      月刊「細胞」

      Volume: 55 Pages: 61-64

    • Related Report
      2022 Annual Research Report
  • [Journal Article] 特集 リソソーム研究の新展開 Ⅰ.リソソームの新しい機能 リソソームによる高分子の新たな取り込み機構2022

    • Author(s)
      藤原 悠紀、株田 智弘
    • Journal Title

      生体の科学

      Volume: 73 Issue: 3 Pages: 212-215

    • DOI

      10.11477/mf.2425201504

    • ISSN
      0370-9531, 1883-5503
    • Year and Date
      2022-06-15
    • Related Report
      2022 Annual Research Report
  • [Journal Article] TMEM67 is required for the gating function of the transition zone that controls entry of membrane-associated proteins ARL13B and INPP5E into primary cilia2022

    • Author(s)
      Yinsheng Zhuoma、Miyoshi Ko、Qin Yuanyuan、Fujiwara Yuuki、Yoshimura Takeshi、Katayama Taiichi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 636 Pages: 162-169

    • DOI

      10.1016/j.bbrc.2022.10.078

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 細胞内構成因子の新たな分解経路 ーそのメカニズムと病態生理的意義ー2022

    • Author(s)
      藤原悠紀
    • Journal Title

      日本病態生理学会雑誌

      Volume: 31 Pages: 33-35

    • Related Report
      2022 Annual Research Report
  • [Journal Article] 輝け次代の担い手たち 生体高分子のリソソームへの新たな輸送・分解経路2022

    • Author(s)
      藤原悠紀
    • Journal Title

      神経化学

      Volume: 61 Pages: 7-13

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Pathology-associated change in levels and localization of SIDT2 in postmortem brains of Parkinson's disease and dementia with Lewy bodies patients2022

    • Author(s)
      Fujiwara Yuuki、Kabuta Chihana、Sano Terunori、Murayama Shigeo、Saito Yuko、Kabuta Tomohiro
    • Journal Title

      Neurochemistry International

      Volume: 152 Pages: 105243-105243

    • DOI

      10.1016/j.neuint.2021.105243

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Elongation of primary cilia by expression of serotonin receptor type 6 is mediated by cyclin-dependent kinase 52022

    • Author(s)
      Sho Shikada, Ko Miyoshi, Sarina Han, Zhuoma Yinsheng, Yuanyuan Qin, Yuuki Fujiwara, Takeshi Yoshimura, Taiichi Katayama
    • Journal Title

      Journal of Brain Science

      Volume: in press

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] (総説)リソソームによる高分子の新たな取り込み機構2022

    • Author(s)
      藤原悠紀, 株田智弘
    • Journal Title

      生体の科学

      Volume: in press

    • Related Report
      2021 Research-status Report
  • [Presentation] Novel proteolytic pathway in lysosomes required for neuromuscular homeostasis2023

    • Author(s)
      Yuuki Fujiwara
    • Organizer
      17th Meeting of the Asian-Pacific Society for Neurochemistry (APSN2023), Invited Young Investigators’ Colloquium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 細胞内新規タンパク質分解経路の発見とその破綻を原因とする神経・筋疾患2023

    • Author(s)
      藤原悠紀
    • Organizer
      第2回日本医学会連合Rising Starリトリート
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Novel intracellular proteolytic pathway required for maintenance of neuromuscular homeostasis2023

    • Author(s)
      Yuuki Fujiwara, Viorica Raluca Contu, Chihana Kabuta, Megumu Ogawa, Hiromi Fujita, Hisae Kikuchi, Ryohei Sakai, Katsunori Hase, Mari Suzuki, Ikuko Koyama-Honda, Michio Inoue, Yasishi Oya, Yukiko U. Inoue, Takayoshi Inoue, Ryosuke Takahashi, Ichizo Nishino, Keiji Wada, Satoru Noguchi, Tomohiro Kabuta
    • Organizer
      日本生理学会第100回記念大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 脳・神経系の恒常性維持に関わる新たな細胞内分解経路の発見2022

    • Author(s)
      藤原悠紀, Viorica Raluca Contu, 周寅平, 株田千華, 小川恵, 酒井了平, 長谷勝徳, 小山郁子, 井上道雄, 大矢寧, 井上由紀子, 井上高良, 高橋良輔, 西野一三, 和田圭司, 野口悟, 株田智弘, 片山泰一
    • Organizer
      第49回日本脳科学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細胞内構成因子の新たな分解経路 ―そのメカニズムと病態生理的意義―2022

    • Author(s)
      藤原悠紀
    • Organizer
      第31回日本病態生理学会大会 ビジョナリーシンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Novel uptake and degradation pathway of proteins by lysosomes required for neuromuscular homeostasis2022

    • Author(s)
      Yuuki Fujiwara, Viorica Raluca Contu, Chihana Kabuta, Megumu Ogawa, Hiromi Fujita, Hisae Kikuchi, Ryohei Sakai, Katsunori Hase, Mari Suzuki, Ikuko Koyama Honda, Michio Inoue, Yasushi Oya, Yukiko U. Inoue, Takayoshi Inoue, Ryosuke Takahashi, Ichizo Nishino, Keii Wada, Satoru Noguchi, Tomohiro Kabuta
    • Organizer
      The joint meeting of the International Society for Neurochemistry and the Asian Pacific Society for Neurochemistry (ISN-APSN2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 神経・筋恒常性に必須の新たな細胞内タンパク質分解経路の同定2022

    • Author(s)
      藤原悠紀, Viorica Raluca Contu, 株田千華, 小川恵, 宮城美月, 酒井了平, 長谷勝徳, 鈴木マリ, 小山郁子, 井上道雄, 大矢寧, 井上由紀子, 川野竜司, 井上高良, 高橋良輔, 西野一三, 和田圭司, 野口悟, 株田智弘
    • Organizer
      Neuro2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] リソソームを介した新たな細胞内分解システム DUMP の破綻を原因とする進行性神経・筋疾患2022

    • Author(s)
      藤原悠紀, 西野一三, 和田圭司, 野口悟, 株田智弘
    • Organizer
      第30回 日本病態生理学会大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-01-30  

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