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

The molecular mechanism that C/EBPa and Bcl11a induces AML development and progression

Research Project

Project/Area Number 20K17389
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionJapanese Foundation for Cancer Research

Principal Investigator

SUNAMI Yoshitaka  公益財団法人がん研究会, がん研究所 発がん研究部, 研究員 (50732864)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords急性骨髄性白血病 / Bcl11a / Asb2 / LSD1/HDAC阻害剤 / 骨髄生着 / LSD1阻害剤 / HDAC阻害剤 / 分化誘導 / C/EBPα
Outline of Research at the Start

AMLの発症には、複数の転写因子の機能破綻が大きく関わっているが、これらがどのように相互作用しているかは明らかではない。我々は骨髄細胞分化を司る転写因子であるC/EBPα変異と転写抑制因子Bcl11aによるPU.1の機能阻害が協調してAMLを悪性化させるというモデルを着想した。本研究では、C/EBPα変異とBcl11aが協調してAMLを発症させることを証明し、さらにはエンハンサー活性の変化を介して、これらが協調してAMLを発症・悪性化させるメカニズムを解明する。以上から、AMLにおけるC/EBPα変異/Bcl11aの協調作用を示し、AML発症・悪性化の分子基盤を解明する。

Outline of Final Research Achievements

C/EBPα and PU.1 are transcriptional factors that regulates myeloid differentiation in normal hematopoiesis, and these 2 factors act as tumor suppressors in AML. The pseudokinase Trib1 induces the degradation of C/EBPα p42 isoform, whereas transcriptional repressor Bcl11a suppresses the transcriptional activity of PU.1 by recruiting corepressors. We previously revealed that Bcl11a cooperates with Trib1 in the development of AML. In this project, we attempted to clarify that C/EBPα abnormality and Bcl11a-repressed PU.1 activity cooperatively induces AML development and progression. First, we found LSD1 and HDAC1/2 as corepressors that are recruited by Bcl11a in AML cells. Second, treatment of AML cells with LSD1/HDAC inhibitors resulted in the growth inhibition in a Bcl11a-expression dependent manners. Finally, we identified E3 ubiquitin ligase Asb2 as a novel Bcl11a target gene that promotes the engraftment of AML cells, subsequently induces AML development and progression.

Academic Significance and Societal Importance of the Research Achievements

C/EBPαとPU.1は顆粒球系・単球系細胞の分化において競合的に働くとされており、これらの異常が協調してAMLを誘導するという先行研究はこれまでにない。また今回、同定したBcl11a新規標的遺伝子Asb2のAMLにおける役割については、これまでに十分な検討がされておらず、本研究成果の学術的意義は高い。
LSD1/HDAC阻害剤がAMLに有用であることが、複数の臨床試験により証明されており、Bcl11aはLSD1/HDAC阻害剤の治療効果予測因子となりうる。またBcl11a-Asb2経路を治療標的とすることでAMLの新規治療法開発につながる可能性があり、本研究で得られた成果は社会的意義も高い。

Report

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

    (10 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] BCL11A promotes myeloid leukemogenesis by repressing PU.1 target genes2022

    • Author(s)
      Sunami Yoshitaka、Yokoyama Takashi、Yoshino Seiko、Takahara Tomoko、Yamazaki Yukari、Harada Hironori、Nakamura Takuro
    • Journal Title

      Blood Advances

      Volume: 6 Issue: 6 Pages: 1827-1843

    • DOI

      10.1182/bloodadvances.2021004558

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Trib1 promotes the development of acute myeloid leukemia in a Ts1Cje mouse model of Down syndrome2021

    • Author(s)
      Yoshino Seiko、Tanaka Miwa、Sunami Yoshitaka、Takahara Tomoko、Yamazaki Yukari、Homme Mizuki、Niibori-Nambu Akiko、Osato Motomi、Minami Takashi、Ishihara Keiichi、Nakamura Takuro
    • Journal Title

      Leukemia

      Volume: 36 Issue: 2 Pages: 558-561

    • DOI

      10.1038/s41375-021-01384-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Patient’s age and d-dimer levels predict the prognosis in patients with TAFRO syndrome2021

    • Author(s)
      Kawabata H, Fujimoto S, Sakai T, Yanagisawa H, Kitawaki T, Nara K, Hagihara M, Yamamoto H, Tanimizu M, Kato C, Origuchi T Sunami K, Sunami Y, Masunari T, Nakamura N, Kobayashi M, Yamagami K, Miura K Takai K, Aoki S, Tsukamoto N, Masaki Y
    • Journal Title

      International Journal of Hematology

      Volume: 114 Issue: 2 Pages: 179-188

    • DOI

      10.1007/s12185-021-03159-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Trib1 promotes acute myeloid leukemia progression by modulating the transcriptional programs of Hoxa92021

    • Author(s)
      Yoshino Seiko、Yokoyama Takashi、Sunami Yoshitaka、Takahara Tomoko、Nakamura Aya、Yamazaki Yukari、Tsutsumi Shuichi、Aburatani Hiroyuki、Nakamura Takuro
    • Journal Title

      Blood

      Volume: 137 Issue: 1 Pages: 75-88

    • DOI

      10.1182/blood.2019004586

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] AMLの発症と悪性化におけるE3ユビキチンリガーゼCop1の役割2022

    • Author(s)
      角南義孝, 芳野聖子, 中村卓郎
    • Organizer
      第26回 造血器腫瘍研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The role of Cop1 in AML development and progression.2021

    • Author(s)
      Sunami Y, Yoshino S, Nakamura T
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] BCL11A promotes myeloid leukemogenesis by abrogating transcriptional activity of PU.12021

    • Author(s)
      Sunami Y, Nakamura T
    • Organizer
      FASEB hematologic Malignancies Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] BCL11A promotes myeloid leukemogenesis by abrogating transcriptional activity of PU.1.2021

    • Author(s)
      Sunami Y, Yoshino S, Yokoyama T, Nakamura T.
    • Organizer
      39th Sapporo International Cancer Synposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bcl11a promotes myeloid leukemogenesis by abrogating transcriptional activity of PU.1.2020

    • Author(s)
      Sunami Y, Yoshino S, Yokoyama T, Nakamura T.
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] Bcl11aはPU.1の転写活性阻害によりAMLの発症と悪性化を促進する2020

    • Author(s)
      角南義孝, 芳野聖子, 横山隆志, 中村卓郎
    • Organizer
      先端モデル動物プラットフォーム2020年度若手支援技術講習会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi