• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Analysis of heterogeneity and fluctuation of leukemic stem cells and its application to leukemia therapy

Research Project

Project/Area Number 20K16356
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionOsaka University

Principal Investigator

Shingai Yasuhiro  大阪大学, 大学院医学系研究科, 招へい教員 (70791614)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords白血病幹細胞 / ESAM / 不均一性 / 急性骨髄性白血病 / TGFβシグナル
Outline of Research at the Start

本研究では、白血病幹細胞の不均一性を分子生物学的なゆらぎの概念としてとらえ、その調節機序を明確にすることで、より正確な白血病幹細胞モデルの構築を行う。さらに白血病幹細胞のゆらぎの制御を通じて、新規治療方法の開発へと繋げることを目標とする。

Outline of Final Research Achievements

We analyzed the heterogeneity and regulatory mechanisms of leukemic cells in human AML based on the altered expression of Endothelial cell-Selective Adhesion Molecule (ESAM), a novel hematopoietic stem cell antigen. In human AML, ESAM-negative and ESAM-positive cells were mutually variable and showed plasticity without hierarchy of AML cells associated with ESAM expression Plasticity of ESAM expression was promoted by TGFβ1 stimulation, including autocrine secretion by AML cells themselves Inhibition of TGFβ signaling not only inhibited ESAM expression plasticity, but also inhibited AML cell proliferation and induced cell death, thereby enhancing the effect of anti-tumor drugs.

Academic Significance and Societal Importance of the Research Achievements

急性骨髄性白血病(AML)については、これまで多くの研究により、染色体・遺伝子異常による層別化や、新規治療薬が開発されてきた。しかし、未だに完治のためには造血幹細胞移植が必要であり、移植後の再発も多く、極めて難治性の疾患である。AMLにおいては、白血病幹細胞(LSC)が化学療法抵抗性や再発に関与すると報告されており、LSCを根絶することがAMLの治療に重要と考えられている。本研究において、ヒトAMLにはTGFβシグナが関与する不均一性と可塑性が存在し、その阻害は治療標的となり得ることが示唆された。これらの研究成果はAMLにおけるLSCの病態解明だけでなく、新規治療にも寄与すると期待される。

Report

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

    (3 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Special AT-Rich Sequence-Binding Protein 1 Supports Survival and Maturation of Naive B Cells Stimulated by B Cell Receptors2022

    • Author(s)
      Ozawa Takayuki、Fujii Kentaro、Sudo Takao、Doi Yukiko、Nakai Ritsuko、Shingai Yasuhiro、Ueda Tomoaki、Baba Yoshihiro、Hosen Naoki、Yokota Takafumi
    • Journal Title

      The Journal of Immunology

      Volume: 208 Issue: 8 Pages: 1937-1946

    • DOI

      10.4049/jimmunol.2101097

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Autonomous TGFβ signaling induces phenotypic variation in human acute myeloid leukemia2021

    • Author(s)
      Yasuhiro Shingai , Takafumi Yokota,et al
    • Journal Title

      Stem cells

      Volume: - Issue: 6 Pages: 723-736

    • DOI

      10.1002/stem.3348

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Autonomous TGFβ signaling promotes phenotypic variations of human AML cells2020

    • Author(s)
      Yasuhiro Shingai
    • Organizer
      日本血液学会
    • Related Report
      2020 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi