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Analysis of physiological roles of protein degradation pathways in blood

Research Project

Project/Area Number 20H03249
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionChiba University

Principal Investigator

Itakura Eisuke  千葉大学, 大学院理学研究院, 准教授 (90754218)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywordsタンパク質分解 / 細胞外タンパク質 / 異常タンパク質 / 細胞外シャペロン / エンドサイトーシス / 細胞外異常タンパク質 / クラステリン / α2マクログロブリン / タンパク質品質管理 / シャペロン / 血液 / 変性タンパク質 / Clusterin
Outline of Research at the Start

動物の血液や体液内には高濃度のタンパク質が存在し、はたらいている。ストレスを受けたタンパク質は変性し、機能しなくなるだけでなく、生体内機能に悪影響を及ぼす。しかし細胞外の変性タンパク質を分解する経路はよくわかっていない。申請者は細胞外の変性したタンパク質を細胞外シャペロンが選択的に分解する経路を近年発見した。この経路は細胞外の変性タンパク質やアルツハイマー病関連因子であるアミロイドβなどを選択的に認識し、細胞内へエンドサイトーシスすることでリソソーム分解へ導くことが判明した。しかしその生理的重要性がわかっていない。

Outline of Final Research Achievements

The progress of this research project has revealed some aspects of various protein quality control mechanisms, including the identification of various compounds that induce mitochondrial stress, elucidation of molecular mechanisms related to autophagy, the degradation of abnormal extracellular proteins by α2-macroglobulin. The results of these studies have been published in J. Biol. Chem., Cell Death Discovery, Molecular Biology of the Cell, Molecular Biology of the Cell, Star Protocols, and Scientific Reports. Furthermore, we identified novel extracellular chaperones CRED1&2 and established the foundation for future extracellular protein degradation systems.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、異常なタンパク質が細胞内や細胞外に生じた場合に異なるメカニズムによって、認識され、分解へ導く、その機構の一旦を明らかとした。異常タンパク質は形、場所、時期など異なり、それぞれの応じたタンパク質品質管理がはたらくことで、生体内の恒常性を保つことがわかった。特に細胞外のタンパク質分解系の重要性が示唆され、今後更なるタンパク質品質管理システムの詳細な機構の解明や、タンパク質蓄積疾患への応用へと期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (21 results)

All 2023 2022 2021 2020 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (14 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Remarks (1 results)

  • [Journal Article] Alpha 2-macroglobulin acts as a clearance factor in the lysosomal degradation of extracellular misfolded proteins2023

    • Author(s)
      Tomihari Ayaka、Kiyota Mako、Matsuura Akira、Itakura Eisuke
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 4680-4680

    • DOI

      10.1038/s41598-023-31104-x

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CCPG1 recognizes endoplasmic reticulum luminal proteins for selective ER-phagy2023

    • Author(s)
      Ishii Shunsuke、Chino Haruka、Ode Koji L.、Kurikawa Yoshitaka、Ueda Hiroki R.、Matsuura Akira、Mizushima Noboru、Itakura Eisuke
    • Journal Title

      Molecular Biology of the Cell

      Volume: 34 Issue: 4

    • DOI

      10.1091/mbc.e22-09-0432

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Disruption of actin dynamics induces autophagy of the eukaryotic chaperonin TRiC/CCT2022

    • Author(s)
      Date Yuki、Matsuura Akira、Itakura Eisuke
    • Journal Title

      Cell Death Discovery

      Volume: 8 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41420-022-00828-6

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Protocol for quantification of the lysosomal degradation of extracellular proteins into mammalian cells2021

    • Author(s)
      Tomihari Ayaka、Chiba Momoka、Matsuura Akira、Itakura Eisuke
    • Journal Title

      STAR Protocols

      Volume: 2 Issue: 4 Pages: 100975-100975

    • DOI

      10.1016/j.xpro.2021.100975

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Labeling and measuring stressed mitochondria using a PINK1-based ratiometric fluorescent sensor2021

    • Author(s)
      Uesugi Rie、Ishii Shunsuke、Matsuura Akira、Itakura Eisuke
    • Journal Title

      Journal of Biological Chemistry

      Volume: 297 Issue: 5 Pages: 101279-101279

    • DOI

      10.1016/j.jbc.2021.101279

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)12021

    • Author(s)
      Daniel J Klionsky、Shu Aizawa、Amal Kamal Abdel-Aziz、Sara Abdelfatah、Mahmoud Abdellatif、Asghar Abdoli、Steffen Abel、Hagai Abeliovich、Marie H Abildgaard、Yakubu Princely Abudu、Abraham Acevedo-Arozena、Iannis E Adamopoulos、Khosrow Adeli、Timon E Adolph、Annagrazia Adornetto、Elma Aflaki、Galila Agam et al.
    • Journal Title

      Autophagy

      Volume: 17 Issue: 1 Pages: 1-382

    • DOI

      10.1080/15548627.2020.1797280

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Shear stress sensitive(SSS)血漿タンパク質の品質管理経路2023

    • Author(s)
      板倉英祐
    • Organizer
      第 15 回 オートファジー研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 細胞外不良タンパク質を分解へ導く細胞外シャペロン2022

    • Author(s)
      板倉英祐
    • Organizer
      2022 年度日本生化学会関東支部例会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Mito-Painを用いたミトコンドリアストレス検出と解析2022

    • Author(s)
      板倉英祐
    • Organizer
      第43回 生体膜と薬物の相互作用シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Analysis of selective degradation of ER-luminal substrates by ER-phagy2022

    • Author(s)
      Shunsuke Ishii, Haruka Chino, Akira Matsuura, Noboru Mizushima, Eisuke Itakura
    • Organizer
      The 10th International Symposium on Autophagy(ISA2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A novel autophagy inhibitor, BTBT, suppresses dissociation of early ATG proteins2022

    • Author(s)
      Momoka Chiba, Akira Matsuura, Eisuke Itakura
    • Organizer
      The 10th International Symposium on Autophagy(ISA2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 細胞外環境における細胞外シャペロンを介したタンパク質分解機構2022

    • Author(s)
      板倉英祐
    • Organizer
      第94回 日本生化学大会(名古屋) (口頭発表)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細胞外異常タンパク質を分解する新規細胞外シャペロンの機能解析2022

    • Author(s)
      千葉桃果, 松浦彰, 板倉英祐
    • Organizer
      第94回 日本生化学大会(名古屋) (口頭発表)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 小胞体膜タンパク質による基質直接認識を介したオートファジー依存的小胞体品質管理機構の解析2022

    • Author(s)
      石井俊輔 、千野遥、松浦彰 、水島昇、板倉英祐
    • Organizer
      第94回 日本生化学大会(名古屋) (口頭発表)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細胞外タンパク質の取り込み分解活性の制御機構の解析2022

    • Author(s)
      清田真子, 松浦彰, 板倉英祐
    • Organizer
      第94回 日本生化学大会(名古屋) (口頭発表)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Shear stress感受性血漿タンパク質の同定と解析2022

    • Author(s)
      葛城優香, 松浦彰, 板倉英祐
    • Organizer
      第94回 日本生化学大会(名古屋) (口頭発表)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細胞外シャペロンによる血液内の異常タンパク質分解機構2021

    • Author(s)
      板倉英祐
    • Organizer
      第65回日本薬学会関東支部大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] α2Mによる細胞外タンパク質分解システムの機能解析2020

    • Author(s)
      富張彩佳、松浦彰、板倉英祐
    • Organizer
      第93回 日本生化学大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 細胞外タンパク質分解システムCREDの基質選択性の研究2020

    • Author(s)
      板倉英祐、千葉桃果、富張彩佳、松浦彰
    • Organizer
      第2回新学術領域研究「マルチモードオートファジー」班会議(オンライン)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Discovery of extracellular protein degradation system in a blood2020

    • Author(s)
      Eisuke Itakura, Momoka Chiba, Ayaka Tomihari, Akira matsuura
    • Organizer
      Japanese Association for Animal Cell Technology(JAACT)2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] プレスリリース:α2マクログロブリンが変性タンパク質を分解する役割を発見

    • URL

      https://www.chiba-u.ac.jp/general/publicity/press/files/2022/20230328_2.pdf

    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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