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Elucidation of the undifferentiated maintenance mechanism of leukemia stem cells regulated by the lysosomal metabolic pathway

Research Project

Project/Area Number 21K16264
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionKanazawa University

Principal Investigator

kurayoshi kenta  金沢大学, がん進展制御研究所, 博士研究員 (00802901)

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: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords代謝 / 鉄 / リソソーム / 白血病 / 白血病幹細胞
Outline of Research at the Start

急性骨髄性白血病(AML)は、造血幹・前駆細胞から生じる悪性腫瘍で、骨髄球系細胞の異常増殖と分化不全を特徴とする。申請者は、すべてのヒト代謝関連分子を対象としたCRISPRカスタムライブラリーを用い、未分化性維持に寄与する代謝制御因子の探索を行った。その結果、リソソー ムは鉄の恒常性を維持することで、白血病幹細胞で特異的に未分化性を維持する可能性を見出した。本研究では、リソソーム-鉄経路下流の未分化維持因子を特定およびその発現制御機構を解析することで、リソソーム-鉄経路を介した白血病幹細胞の未分化維持機構を解明する。

Outline of Final Research Achievements

The applicant discovered the potential of lysosomes to enhance the expression of oncogenes and maintain the undifferentiated state in leukemia stem cells by maintaining iron homeostasis. In this study, we aimed to analyze the mechanism of undifferentiated maintenance in leukemia stem cells by: 1) identifying the regulatory mechanism of oncogenes expression through lysosomal iron metabolism, and 2) exploring downstream undifferentiated maintenance factors of lysosomes and iron. It was revealed that lysosomes control the expression of oncogenes by inducing iron-dependent enhancer reprogramming. Additionally, iron-binding proteins contributing to undifferentiated maintenance and enhancer control of oncogene was identified. Therefore, a portion of the undifferentiated maintenance mechanism mediated by lysosomal iron metabolism has been elucidated.

Academic Significance and Societal Importance of the Research Achievements

本研究により、リソソーム-鉄経路が、がん遺伝子のエンハンサーリプログラミングを誘導することで、白血病細胞の未分化性維持に寄与することが判明した。本研究により、リソソームを介したがんの悪性形質の制御機構が明らかとなった。本研究成果は、あらたながん治療戦略の構築につながる可能性がある。

Report

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

    (3 results)

All 2022 2021

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

  • [Journal Article] Therapeutic advantage of targeting lysosomal membrane integrity supported by lysophagy in malignant glioma2022

    • Author(s)
      Jing Yongwei、Kobayashi Masahiko、Vu Ha Thi、Kasahara Atsuko、Chen Xi、Pham Loc Thi、Kurayoshi Kenta、Tadokoro Yuko、Ueno Masaya、Todo Tomoki、Nakada Mitsutoshi、Hirao Atsushi
    • Journal Title

      Cancer Science

      Volume: 113 Issue: 8 Pages: 2716-2726

    • DOI

      10.1111/cas.15451

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] RHEB is a potential therapeutic target in T cell acute lymphoblastic leukemia2022

    • Author(s)
      Pham Loc Thi、Peng Hui、Ueno Masaya、Kohno Susumu、Kasada Atuso、Hosomichi Kazuyoshi、Sato Takehiro、Kurayoshi Kenta、Kobayashi Masahiko、Tadokoro Yuko、Kasahara Atsuko、Shoulkamy Mahmoud I.、Xiao Bo、Worley Paul F.、Takahashi Chiaki、Tajima Atsushi、Hirao Atsushi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 621 Pages: 74-79

    • DOI

      10.1016/j.bbrc.2022.06.089

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] FOXOs下流因子を対象とした白血病幹細胞の分化誘導法の開発2021

    • Author(s)
      倉吉 健太、平尾 敦
    • Organizer
      若手支援技術講習会
    • Related Report
      2021 Research-status Report

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

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