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Investigating molecular basis of chemoresistance using a novel leukemia cell line harboring high-risk chromosome abnormalities

Research Project

Project/Area Number 21K08400
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionYokohama City University

Principal Investigator

KUNIMOTO Hiroyoshi  横浜市立大学, 医学部, 助教 (80464923)

Co-Investigator(Kenkyū-buntansha) 中島 秀明  横浜市立大学, 医学研究科, 教授 (30217723)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsYCU-AML1 / OCI-AML20 / EZH2 / apoptosis / GADD45g / p38 / p53 / アポトーシス / 高リスク染色体異常 / 抗がん剤耐性機構
Outline of Research at the Start

3番染色体の逆位・転座(inv(3)/t(3;3))を有する骨髄系腫瘍は高率に7番染色体の欠失(-7)を合併し、両者を有する患者は極めて予後が悪い。しかしinv(3)/t(3;3)と-7が如何に協調して予後不良な白血病を発症させるのか、分子基盤は不明である。
本研究では、t(3;3)と-7を有する新規白血病細胞株YCU-AML1を応用し、inv(3)/t(3;3)と-7を有する白血病が強力な抗がん剤耐性機構を有するのかを明らかにし、その分子基盤の解明を進める。本研究の成果は、inv(3)/t(3;3)と-7を有する白血病に特徴的な抗がん剤耐性機序の解明と新たな治療法の開発に繋がると期待される。

Outline of Final Research Achievements

Drug screen assay revealed that multiple EZH2 inhibitors show pharmacological activity against YCU-AML1 and OCI-AML20 cells, two human AML cell lines harboring both inv(3)/t(3;3) and -7. In vitro culture with EZH2 inhibitors significantly suppressed cell growth of YCU-AML1 and OCI-AML20 cells. In addition, EZH2 inhibition efficiently induced apoptosis in these AML cell lines. In order to seek the exact molecular basis of EZH2 inhibitor-mediated apoptosis induction in YCU-AML1 and OCI-AML20 cells, we performed RNA-seq and CUT&Tag-seq. These omics data revealed that GADD45g-p38-p53 axis is activated upon EZH2 inhibition in these cells and that epigenetic silencing of GADD45g-p38-p53 axis is a major molecular mechanism by which high-risk MDS/AML cells with inv(3)/t(3;3) and -7 evade apoptosis cell death.

Academic Significance and Societal Importance of the Research Achievements

臨床的に予後不良なinv(3)/t(3;3)と-7の両者を有するMDS/AML細胞の細胞増殖を抑制し効率的にアポトーシスを誘導する分子標的薬としてEZH2阻害剤を見出すことに成功した。in vitro培養系のみならずin vivo生体モデルでもEZH2阻害剤はYCU-AML1によるヒト白血病発症能を抑制することも確認した。その分子基盤として、GADD45g-p38-p53経路の活性化がEZH2阻害によるアポトーシス誘導に必須であることを明らかにし、定常状態における本経路の抑制がinv(3)/t(3;3)と-7を有する白血病のアポトーシス回避に重要であることを明らかにした。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (10 results)

All 2023 2022

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Clinical and genetic features of Japanese cases of MDS associated with VEXAS syndrome2023

    • Author(s)
      Kunimoto Hiroyoshi、Miura Ayaka、Maeda Ayaka、Tsuchida Naomi、Uchiyama Yuri、Kunishita Yosuke、Nakajima Yuki、Takase-Minegishi Kaoru、Yoshimi Ryusuke、Miyazaki Takuya、Hagihara Maki、Yamazaki Etsuko、Kirino Yohei、Matsumoto Naomichi、Nakajima Hideaki
    • Journal Title

      International Journal of Hematology

      Volume: - Issue: 4 Pages: 494-502

    • DOI

      10.1007/s12185-023-03598-8

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Incidence and Risk of Hematological Adverse Events Associated With Immune Checkpoint Inhibitors: A Systematic Literature Review and Meta-Analysis2023

    • Author(s)
      Ohashi Takuma、Takase-Minegishi Kaoru、Maeda Ayaka、Hamada Naoki、Yoshimi Ryusuke、Kirino Yohei、Teranaka Hiroshi、Kunimoto Hiroyoshi、Hagihara Maki、Matsumoto Kenji、Namkoong Ho、Horita Nobuyuki、Nakajima Hideaki
    • Journal Title

      Journal of Hematology

      Volume: 12 Issue: 2 Pages: 66-74

    • DOI

      10.14740/jh1090

    • Related Report
      2023 Annual Research Report
  • [Journal Article] O-Linked N-Acetylglucosamine Transferase Ensures Survival of Mouse Fetal Liver Hematopoietic Progenitors Partly by Regulating Bcl-xL and Oxidative Phosphorylation2023

    • Author(s)
      Soma Shunsuke、Murakami Koichi、Fukuchi Yumi、Kunimoto Hiroyoshi、Nakajima Hideaki
    • Journal Title

      Stem Cells

      Volume: 42 Issue: 1 Pages: 55-63

    • DOI

      10.1093/stmcls/sxad076

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Systematic evaluation of AML-associated antigens identifies anti-U5 SNRNP200 therapeutic antibodies for the treatment of acute myeloid leukemia2023

    • Author(s)
      Knorr Katherine、Rahman Jahan、Erickson Caroline、Wang Eric、Monetti Mara、Li Zhuoning、Ortiz-Pacheco Juliana、Jones Andrew、Lu Sydney X.、Stanley Robert F.、Baez Maria、Fox Nina、Castro Cynthia、Marino Alessandra E.、Jiang Caroline、Penson Alex、Hogg Simon J.、Mi Xiaoli、Nakajima Hideaki、Kunimoto Hiroyoshi、et al.
    • Journal Title

      Nature Cancer

      Volume: 4 Issue: 12 Pages: 1675-1692

    • DOI

      10.1038/s43018-023-00656-2

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Aberrant <i>EVI1</i> splicing contributes to <i>EVI1</i>-rearranged leukemia2022

    • Author(s)
      Tanaka Atsushi、Kunimoto Hiroyoshi et al.
    • Journal Title

      Blood

      Volume: 140 Issue: 8 Pages: 875-888

    • DOI

      10.1182/blood.2021015325

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Clinical risk factors for patients with myelodysplastic syndromes undergoing allogeneic hematopoietic stem cell transplantation2022

    • Author(s)
      Teshigawara-Tanabe Haruka、Hagihara Maki、Aoki Jun、Koyama Satoshi、Takahashi Hiroyuki、Nakajima Yuki、Kunimoto Hiroyoshi、Tachibana Takayoshi、Miyazaki Takuya、Matsumoto Kenji、Tanaka Masatsugu、Yamazaki Etsuko、Fujisawa Shin、Kanamori Heiwa、Taguri Masataka、Nakajima Hideaki
    • Journal Title

      Hematology

      Volume: 27 Issue: 1 Pages: 620-628

    • DOI

      10.1080/16078454.2022.2052601

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] PRC2を介したアポトーシス回避機構はinv(3)/t(3;3)と-7を有する白血病の治療標的である2023

    • Author(s)
      國本博義・三浦彩華・匂坂麻衣子・伊藤美恵子・本間大輔・堤信二・佐久間敬之・大橋卓馬・寺中寛・池田順治・吉見昭秀・後藤裕明・中島秀明
    • Organizer
      第85回日本血液学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 急性骨髄性白血病においてPRDM16による代謝リプログラミングはシタラビン耐性を誘導する2023

    • Author(s)
      池田順治・國本博義・齋藤祐介・辻本信一・竹内正宣・三浦彩華・村上紘一・加藤生真・菱木貴子・早川典代・松浦友美・多胡めぐみ・横山明彦・柴徳生・田村智彦・伊藤秀一・中島秀明
    • Organizer
      第85回日本血液学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Clinical and genetic features of MDS associated with VEXAS syndrome2023

    • Author(s)
      Hiroyoshi Kunimoto
    • Organizer
      The 85th JSH Annual Meeting, JSH-ASH Joint Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] PRC2-mediated apoptosis evasion is a therapeutic target of MDS/AML harboring inv(3)/t(3;3) and -72023

    • Author(s)
      1.Kunimoto H, Miura A, Sagisaka M, Ito M, Honma D, Tsutsumi S, Sakuma T, Ohashi T, Teranaka H, Ikeda J, Toya T, Harada Y, Doki N, Cai SF, Yoshimi A, Goto H, Levine RL, Nakajima H
    • Organizer
      65th American Society of Hematology (ASH) Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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