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Fine morphology and molecular basis of liquid-liquid phase separation caused by the p62 mutation

Research Project

Project/Area Number 20H03415
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48010:Anatomy-related
Research InstitutionFukushima Medical University

Principal Investigator

Waguri Satoshi  福島県立医科大学, 医学部, 教授 (30244908)

Co-Investigator(Kenkyū-buntansha) 田村 直輝  福島県立医科大学, 医学部, 講師 (70745992)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2021: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2020: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywordsp62液滴 / SQSTM1 / 液-液相分離 / ストレス顆粒 / 高浸透圧ストレス / 選択的オートファジー / Keap1 / 液滴 / CLEM / 免疫電顕 / 液-液相分離 / オートファジー / 高浸透圧 / p62 / 乳癌 / ゲル / 凝集 / 電子顕微鏡解析
Outline of Research at the Start

様々な分子がひしめく細胞内では、液―液相分離によりできる分子の集合体が重要な役割りを担う。しかし生体における相分離の同定は困難であり、化学固定した組織で認められる集合体が液体様の「液滴」か、それよりも固い「ゲル」か「凝集体」かを区別する術はない。そこで本研究では、相分離を引き起こすp62タンパク質を対象とし、その疾患関連遺伝子変異とp62集合体の微細構造を対比させることで、その形態学的検出法を開発する。これにより、凝集体構造を伴う病態の理解を深める。

Outline of Final Research Achievements

To investigate the physiological significance of p62 droplets, the influence of disease-related genetic mutations in p62 on droplet structure was investigated. However, as a similar study was reported by others, the research plan was changed and detailed analyses of p62-droplets in various experimental systems were carried out. We found that p62-droplets and stress granules induced under hyperosmotic stress showed distinct behavior and fine structures. We also found molecules that undergo autophagy degradation via p62-droplets. In addition, inhibition of LC3-dependent selective autophagy in hepatocytes resulted in the formation of p62-droplets with numerous small vesicles, where Keap1 was also localized. Together with other results, the p62-droplets serve as a platform for both autophagy and stress response signaling.

Academic Significance and Societal Importance of the Research Achievements

p62の遺伝子変異や封入体形成は、神経変性疾患、非アルコール性脂肪肝炎、肝細胞癌等で報告されている。これら封入体の形成は液-液相分離から始まると考えられるが、その病態生理学的な意義は不明であった。また、LC3に依存した選択的オートファジーの基質分解機序は明確ではなかった。今回、p62液滴の形成が選択的オートファジーの重要なプロセスを成すこと、その発動がストレス応答に直接関連していることを示した。本成果は、選択的オートファジーの新たな意義の解明につながると共に、p62液滴形成を制御することが上記疾患の病態の理解と、治療開発の糸口に繋がることを意味する。

Report

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

    (26 results)

All 2023 2022 2021 2020 Other

All Journal Article (9 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 9 results,  Open Access: 9 results) Presentation (15 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results) Remarks (2 results)

  • [Journal Article] STING signalling is terminated through ESCRT-dependent microautophagy of vesicles originating from recycling endosomes.2023

    • Author(s)
      Kuchitsu Y, Mukai K, Uematsu R, Takaada Y, Shinojima A, Shindo R, Shoji T, Hamano S, Ogawa E, Sato R, Miyake K, Kato A, Kawaguchi Y, Nishitani-Isa M, Izawa K, Nishikomori R, Yasumi T, Suzuki T, Dohmae N, Uemura T, Barber GN, Arai H, Waguri S, Taguchi T.
    • Journal Title

      Nature Cell Biology

      Volume: 25 Issue: 3 Pages: 453-466

    • DOI

      10.1038/s41556-023-01098-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The UFM1 system regulates ER-phagy through the ufmylation of CYB5R3.2022

    • Author(s)
      Ishimura R, El-Gowily AH, Noshiro D, Komatsu-Hirota S, Ono Y, Shindo M, Hatta T, Abe M, Uemura T, Lee-Okada HC, Mohamed TM, Yokomizo T, Ueno T, Sakimura K, Natsume T, Sorimachi H, Inada T, Waguri S, Noda NN, Komatsu M.
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 7857-7857

    • DOI

      10.1038/s41467-022-35501-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lack of Hepatic Autophagy Promotes Severity of Liver Injury but Not Steatosis2022

    • Author(s)
      Ding WX, Ni HM, Waguri S, Komatsu M.
    • Journal Title

      J Hepatol.

      Volume: 77(5) Issue: 5 Pages: 1458-1459

    • DOI

      10.1016/j.jhep.2022.05.015

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Loss of <i>Atg2b</i> and <i>Gskip</i> Impairs the Maintenance of the Hematopoietic Stem Cell Pool Size2022

    • Author(s)
      Sakai Shun-suke、Hasegawa Atsushi、Ishimura Ryosuke、Tamura Naoki、Kageyama Shun、Komatsu-Hirota Satoko、Abe Manabu、Ling Yiwei、Okuda Shujiro、Funayama Manabu、Kikkawa Mika、Miura Yoshiki、Sakimura Kenji、Narita Ichiei、Waguri Satoshi、Shimizu Ritsuko、Komatsu Masaaki
    • Journal Title

      Molecular and Cellular Biology

      Volume: 42 Issue: 1 Pages: 1-17

    • DOI

      10.1128/mcb.00024-21

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clathrin adapters AP-1 and GGA2 support expression of epidermal growth factor receptor for cell growth.2021

    • Author(s)
      Takefumi Uemura, Takehiro Suzuki, Naoshi Dohmae, Satoshi Waguri
    • Journal Title

      Oncogenesis

      Volume: 10 Issue: 11 Pages: 80-80

    • DOI

      10.1038/s41389-021-00367-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Arf GTPase-activating proteins SMAP1 and AGFG2 regulate the size of Weibel-Palade bodies and exocytosis of von Willebrand factor2021

    • Author(s)
      Asano Watanabe, Hikari Hataida, Naoya Inoue, Kosuke Kamon, Keigo Baba, Kuniaki Sasaki, Rika Kimura, Honoka Sasaki, Yuka Eura, Wei-Fen Ni, Yuji Shibasaki, Satoshi Waguri, Koichi Kokame and Yoko Shiba
    • Journal Title

      Biology open

      Volume: 10 Issue: 9

    • DOI

      10.1242/bio.058789

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] p62/SQSTM1-droplet serves as a platform for autophagosome formation and anti-oxidative stress response2021

    • Author(s)
      Kageyama S, Gudmundsson SR, Sou YS, Ichimura Y, Tamura N, Kazuno S, Ueno T, Miura Y, Noshiro D, Abe M, Mizushima T, Miura N, Okuda S, Motohashi H, Lee JA, Sakimura K, Ohe T, Noda NN, Waguri S, Eskelinen EL, Komatsu M.
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 16-16

    • DOI

      10.1038/s41467-020-20185-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ERdj8 governs the size of autophagosomes during the formation process2020

    • Author(s)
      Yamamoto Yo-hei、Kasai Ayano、Omori Hiroko、Takino Tomoe、Sugihara Munechika、Umemoto Tetsuo、Hamasaki Maho、Hatta Tomohisa、Natsume Tohru、Morimoto Richard I.、Arai Ritsuko、Waguri Satoshi、Sato Miyuki、Sato Ken、Bar-Nun Shoshana、Yoshimori Tamotsu、Noda Takeshi、Nagata Kazuhiro
    • Journal Title

      Journal of Cell Biology

      Volume: 219 Issue: 8 Pages: 1-12

    • DOI

      10.1083/jcb.201903127

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Autophagy is involved in the sclerotic phase of systemic sclerosis2020

    • Author(s)
      Mori Tatsuhiko、Tamura Naoki、Waguri Satoshi、Yamamoto Toshiyuki
    • Journal Title

      FUKUSHIMA JOURNAL OF MEDICAL SCIENCE

      Volume: 66 Issue: 1 Pages: 17-24

    • DOI

      10.5387/fms.2019-28

    • NAID

      130007834283

    • ISSN
      0016-2590, 2185-4610
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 高浸透圧ストレス下で形成される非膜性オルガネラの解析2023

    • Author(s)
      田村直輝、和栗聡
    • Organizer
      第128回日本解剖学会総会・全国学術総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ATG9Aは、オートファジー非依存的にクラミジア増殖に関与する2023

    • Author(s)
      鈴木倫毅、和栗聡
    • Organizer
      第128回日本解剖学会総会・全国学術総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高浸透圧ストレス下で形成される非膜性オルガネラの比較解析2022

    • Author(s)
      田村直輝、和栗聡
    • Organizer
      第74回日本細胞生物学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] UBXD8flox/flox・CNP1-Creマウスの解析2022

    • Author(s)
      鈴木倫毅、和栗聡
    • Organizer
      日本顕微鏡学会第78回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ultrastructural analysis on the process of isolation membrane formation during piecemeal mitophagy2022

    • Author(s)
      Ritsuko Arai, Shun-ichi Yamashita, Tatsuya Sugisaki, Wu Huajui, Tomotake Kanki, Satoshi Waguri
    • Organizer
      日本顕微鏡学会第78回学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 高浸透圧ストレス下で形成される非膜性オルガネラの微細構造解析2022

    • Author(s)
      田村直輝、和栗聡
    • Organizer
      日本顕微鏡学会第78回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Characterization of p62-body induced under hyperosmotic stress in mammalian cells2022

    • Author(s)
      Naoki Tamura、Satoshi Waguri
    • Organizer
      The 10th International Symposium on Autophagy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Non-autophagic function of ATG9A is involved in the proliferation of Chlamydia trachomatis2022

    • Author(s)
      Michitaka Suzuki、Satoshi Waguri
    • Organizer
      The 10th International Symposium on Autophagy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 哺乳類細胞におけるSQSTM1/p62液滴の形成と分解2022

    • Author(s)
      和栗 聡、田村 直輝
    • Organizer
      第127回日本解剖学会総会・全国学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ピースミールマイトファジー隔離膜形成プロセスの微細形態学的解析2021

    • Author(s)
      荒井 律子、山下 俊一、杉崎 達也、Wu Huajui、神吉 智丈、和栗 聡
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Recycling endosome-localized clathrin adaptors AP-1 and GGA2 regulate cell surface expression of EGFR for cell growth2021

    • Author(s)
      植村 武文、和栗 聡
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ピースミールマイトファジー隔離膜構築プロセスの電子顕微鏡解析2021

    • Author(s)
      荒井 律子、山下 俊一、杉崎 達也、Wu Huajui、神吉 智丈、和栗 聡
    • Organizer
      日本解剖学会第67回東北・北海道連合支部学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Ultrastructural analysis on the process of isolation membrane formation during piecemeal mitophagy2021

    • Author(s)
      Ritsuko Arai, Shun-ichi Yamashita, Tatsuya Sugisaki, Wu Huajui, Tomotake Kanki, Satoshi Waguri
    • Organizer
      126th Annual meeting of The Japanese Association of Anatomists
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 高浸透圧ストレス変動に応答したp62顆粒およびストレス顆粒の形成・消失機序2020

    • Author(s)
      田村直輝、和栗聡
    • Organizer
      第72回日本細胞生物学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高浸透圧ストレス下における非膜性オルガネラの形成と分解2020

    • Author(s)
      田村直輝、和栗聡
    • Organizer
      第66回日本解剖学会 東北・北海道連合支部学術集会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 福島県立医科大学 解剖・組織学講座 業績

    • URL

      https://www.fmu.ac.jp/home/anatomy2/achieve_2022.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 福島県立医科大学 解剖・組織学講座

    • URL

      https://www.fmu.ac.jp/home/anatomy2/

    • Related Report
      2021 Annual Research Report

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

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