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Development of a new myeloma therapy targeting DOT1L

Research Project

Project/Area Number 19K17836
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ishiguro Kazuya  札幌医科大学, 医学部, 助教 (90784439)

Project Period (FY) 2021-11-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords多発性骨髄腫 / DOT1L / ヒストンメチル化
Outline of Research at the Start

多発性骨髄腫は予後不良な疾患であり、新規治療薬の探索が必要である。ヒストンメチル化修飾の異常は様々ながんの発生や進展に関与するが、多発性骨髄腫における知見は十分ではない。応募者はヒストンメチル化酵素であるDOT1Lの阻害が、多発性骨髄腫のキーシグナルであるIRF4-MYCシグナルを抑制することで骨髄腫細胞の増殖を抑制することを明らかにした。本研究はDOT1L阻害剤の作用機序をさらに解明し、臨床応用につなげることを目指す。

Outline of Final Research Achievements

Epigenetic mechanisms such as histone modification play key roles in the pathogenesis of multiple myeloma (MM). We previously showed that DOT1L, a histone H3 lysine 79 (H3K79) methyltransferase is a potential therapeutic target in MM. In this study, we further evaluated the antitumor effect of DOT1L inhibition in MM. CRISPR studies showed that survival of MM was strongly dependent on DOT1L. Transcriptome analysis revealed that DOT1L inhibition upregulated interferon (IFN) signaling in MM cells. Notably, DOT1L inhibition increased expression of endogenous retrovirus (ERV) genes in MM cells. On the other hand, we also found that dual EZH2/G9a inhibition also increased expression of ERV genes and upregulated IFN-stimulated genes in MM cells. A combination of an EZH2 inhibitor and a G9a inhibitor strongly suppressed MM cell proliferation in vitro by inducing cell cycle arrest and apoptosis.
These results suggest that histone modifiers may be an effective therapeutic target for MM.

Academic Significance and Societal Importance of the Research Achievements

DOT1Lは唯一のH3K79メチル化酵素であり、転写活性化に関与することが知られている。DOT1L阻害剤の一つであるEPZ-5676は、MLL関連白血病の第I相試験において一定の奏効率と安全性を示した。一方、多発性骨髄腫(MM)におけるDOT1L阻害剤の効果を明らかにしたのは、我々の研究が世界初である。本研究は今後のMMにおけるDOT1L阻害剤による臨床試験など、MMの新たな治療戦略の開発に寄与するものと考える。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Dual EZH2 and G9a inhibition suppresses multiple myeloma cell proliferation by regulating the interferon signal and IRF4-MYC axis.2021

    • Author(s)
      Ishiguro K, Kitajima H, Niinuma T, Maruyama R, Nishiyama N, Ohtani H, Sudo G, Toyota M, Sasaki H, Yamamoto E, Kai M, Nakase H, Suzuki H.
    • Journal Title

      Cell Death Discovery

      Volume: 7 Issue: 1 Pages: 7-7

    • DOI

      10.1038/s41420-020-00400-0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] DOT1L inhibition activates immunologic signatures in multiple myeloma2022

    • Author(s)
      石黒 一也
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 多発性骨髄腫においてDOT1L阻害は免疫シグナルを活性化する2022

    • Author(s)
      石黒 一也
    • Organizer
      第125回北海道癌談話会例会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Dual inhibition of EZH2 and G9a suppresses multiple myeloma cell proliferation by affecting interferon signaling2021

    • Author(s)
      石黒一也
    • Organizer
      第46回日本骨髄腫学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The anti-myeloma effect of dual EZH2 and G9a inhibition2021

    • Author(s)
      石黒一也
    • Organizer
      第83回日本血液学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of a new epigenetic immunotherapy for multiple myeloma2021

    • Author(s)
      石黒一也
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Dual inhibition of EZH2 and G9a suppresses multiple myeloma cell proliferation by affecting interferon signaling2021

    • Author(s)
      石黒一也
    • Organizer
      第14回日本エピジェネティクス研究会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Development of a new combinational epigenetic treatment for multiple myeloma2020

    • Author(s)
      石黒一也
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] EZH2とG9aの共阻害はインターフェロンシグナルの活性化とIRF-4-MYC axisの抑制により多発性骨髄腫細胞の増殖を抑制する2020

    • Author(s)
      石黒一也
    • Organizer
      第121回北海道癌談話会例会
    • Related Report
      2020 Research-status Report
  • [Presentation] 多発性骨髄腫における新規エピジェネティック併用療法の開発2019

    • Author(s)
      石黒一也
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Research-status Report
  • [Presentation] Development of a new combinational epigenetic therapy of multiple myeloma2019

    • Author(s)
      Kazuya Ishiguro
    • Organizer
      第38回札幌国際がんシンポジウム
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多発性骨髄腫に対するDOT1L阻害の抗腫瘍効果の検討2019

    • Author(s)
      石黒一也
    • Organizer
      第5回がんゲノム・エピゲノム研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多発性骨髄腫に対するDOT1L阻害の抗腫瘍効果の解析2019

    • Author(s)
      石黒一也
    • Organizer
      第120回北海道癌談話会例会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-12-25  

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