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Development of new therapies for malignant cancers through disruption of quality control machinery of mitochondria

Research Project

Project/Area Number 17K07185
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Tumor biology
Research InstitutionOhu University (2020)
Tokyo Medical and Dental University (2019)
Kwansei Gakuin University (2017-2018)

Principal Investigator

ARAKI KEIGO  奥羽大学, 歯学部, 講師 (50756674)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsE2F3d / マイトファジー受容体 / ミトコンドリア / 癌 / E2Fファミリー / オートファジー / 悪性がん細胞 / 細胞死 / マイトファジー / シグナル伝達 / リン酸化 / がん / 転写因子E2F3 / E2F3
Outline of Final Research Achievements

Cancer cells require mechanisms for mitochondrial quality control during tumor progression because mitochondrial damage is caused by changes in the micro-environmental condition during this process (such as hypoxia and nutrient deprivation). In this study, we identified E2F3d, a novel E2F3a isoform, and showed that it mediates hypoxia-induced mitophagy in cancer cells. E2F3d localizes to the outer mitochondrial membrane and its cytosolic domain contains an LC3-interacting region motif. Furthermore, overexpression of E2F3d induces mitochondrial fragmentation and mitophagy, indicating that E2F3d is a novel possible mitophagy receptor. Depletion of E2F3s attenuates hypoxia-induced mitophagy in cancer cells and increases intracellular levels of reactive oxygen species, which is reversed by the reintroduction of E2F3d. We revealed that E2F3d plays an important role in mitophagy and mitochondrial quality control in cancer cells.

Academic Significance and Societal Importance of the Research Achievements

本研究では新たなマイトファジー受容体である「E2F3d」を同定した。これまで同定されていたマイトファジー受容体は主に「分化の過程」においてミトコンドリアの品質管理を行っており、E2F3dは「がん細胞の悪性化」においてミトコンドリアの品質管理を行う最初のマイトファジー受容体と考えられる。E2F3aは細胞の増殖を促進する転写因子であることから、これまで「がん」の診断や治療の標的分子として扱われてきた。E2F3aの新たなアイソフォームであるE2F3dが「悪性がん細胞」のミトコンドリアの品質を維持することから、E2F3ファミリーを標的としたがん治療法の開発の有用性が強く示唆された。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 2017

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

  • [Journal Article] E2F3d, a novel E2F family member, contributes to mitochondrial quality control in cancer2019

    • Author(s)
      荒木 啓吾、大谷 清
    • Journal Title

      生化学

      Volume: 91 Issue: 6 Pages: 781-784

    • DOI

      10.14952/SEIKAGAKU.2019.910781

    • ISSN
      0037-1017
    • Year and Date
      2019-12-25
    • Related Report
      2019 Research-status Report
  • [Journal Article] Mechanical regulation of bone homeostasis through p130Cas-mediated alleviation of NF-κB activity.2019

    • Author(s)
      Miyazaki T, Zhao Z, Ichihara Y, Yoshino D, Imamura T, Sawada K, Hayano S, Kamioka H, Mori S, Hirata H, Araki K, Kawauchi K, Shigemoto K, Tanaka S, Bonewald LF, Honda H, Shinohara M, Nagao M, Ogata T, Harada I, Sawada Y
    • Journal Title

      Sci Adv

      Volume: 5 Issue: 9 Pages: 7802-7802

    • DOI

      10.1126/sciadv.aau7802

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mitochondrial protein E2F3d, a distinctive E2F3 product, mediates hypoxia-induced mitophagy in cancer cells.2019

    • Author(s)
      Araki K, Kawauchi K, Sugimoto W, Tsuda D, Oda H, Yoshida R, Ohtani K.
    • Journal Title

      Communications Biology

      Volume: 2 Issue: 1 Pages: 550-561

    • DOI

      10.1038/s42003-018-0246-9

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Differential requirement for dimerization partner DP between E2F-dependent activation of tumor suppressor and growth-related genes.2018

    • Author(s)
      Komori H, Goto Y, Kurayoshi K, Ozono E, Iwanaga R, Bradford AP, Araki K, Ohtani K.
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1

    • DOI

      10.1038/s41598-018-26860-0

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 恒常的に融合するがん細胞の特性の解析2020

    • Author(s)
      浦野 諒人、取井 猛流、杉本 渉、荒木 啓吾、川内 敬子
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] WDR1は転写因子E2F1によるがん抑制遺伝子の活性化に貢献している2019

    • Author(s)
      藤原悠人、荒木啓吾、大谷清
    • Organizer
      第42回日本分子生物学会年、福岡
    • Related Report
      2019 Research-status Report
  • [Presentation] DEAD/H box 5はp53依存的にE2F1によるアポトーシス誘導を増強する2019

    • Author(s)
      崎浜優士、荒木啓吾、大谷清
    • Organizer
      第42回日本分子生物学会年、福岡
    • Related Report
      2019 Research-status Report
  • [Presentation] 新しいE2FファミリーメンバーであるE2F3dはミトコンドリアに局在し、マイトファジーを誘導する2017

    • Author(s)
      荒木啓吾、 尾田衡弥、 大谷清
    • Organizer
      2017年度生命科学系学会合同年次大会
    • Related Report
      2017 Research-status Report
  • [Book] Distinct E2F-Mediated Transcriptional Mechanisms in Cell Proliferation, Endoreplication and Apoptosis2019

    • Author(s)
      Hideyuki Komori, Ritsuko Iwanaga, Andrew P. Bradford, Keigo Araki and Kiyoshi Ohtani
    • Total Pages
      18
    • Publisher
      InTech Open Access Publisher
    • ISBN
      9781789856842
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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