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Unraveling tumor phenotypic heterogeneity by single-cell epigenetic profiling

Research Project

Project/Area Number 20KK0184
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 50:Oncology and related fields
Research InstitutionNagoya University

Principal Investigator

Hinohara Kunihiko  名古屋大学, 医学系研究科, 特任准教授 (50549467)

Co-Investigator(Kenkyū-buntansha) 小嶋 泰弘  名古屋大学, 医学系研究科, 特任講師 (00881731)
加藤 真一郎  名古屋大学, 医学系研究科, 助教 (40751417)
Project Period (FY) 2020-10-27 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2022: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2021: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywordsエピゲノム / ARID2 / SWI/SNF / 乳がん / メラノーマ / がん細胞多様性 / 薬剤耐性 / 多様性 / がん / 1細胞解析
Outline of Research at the Start

本研究課題では、クロマチン制御因子SWI/SNF複合体の遺伝子変異によって生じるエピジェネティクス制御機構の破綻が、発がん、治療耐性、再発といった悪性形質獲得に至る過程においてどのようにがん細胞の多様性を造出し、悪性化進展基盤を成すのかを1細胞エピゲノム解析技術によって解き明かす。1細胞エピゲノム情報を取り入れた統合解析を推進することにより、遺伝的要因とは異なるエピゲノム制御の側面からがん多様性の新たな理解を試み、エピゲノムのダイナミクスから生み出されるがんの不均一性を制御する革新的方法論の創出を目指す。

Outline of Final Research Achievements

In this study, melanoma and breast cancer, in which ARID2 mutations frequently occur at the onset (early stage) and recurrence (late stage), were used as models for analysis, and their molecular profiles were analyzed multimodally, including single-cell and interactome analysis. The results showed that ARID2 mutations cause disassembly of the PBAF complex and dissociation of RUNX3 binding, resulting in a predominance of ARID1A-containing BAF complexes in the gene expression regulatory regions, which in turn maintains cell proliferative potential. Using this experimental model established in this study, we will continue to analyze the downstream molecular mechanisms in detail in order to discover molecules that can be used as therapeutic targets for ARID2 mutant cancers.

Academic Significance and Societal Importance of the Research Achievements

多くのがん種で高頻度に変異を認めるARID2変異だが、がんの悪性化進展や薬剤耐性化機構においてどのような働きを持つのか未だ不明な部分が多い。現時点でARID2の不活化変異の標的化は技術的に困難であることから、ARID2変異がもたらす下流の分子的変化の解明から標的化し得る分子を同定することが必要である。今回の研究成果として、ARID2変異を解析する実験モデルを確立し、顕著な変化を示す複数のタンパク質の情報を得ることができた。今後これらのメカニズムをさらに研究し、治療標的となる因子の発見につなげていく。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Book (1 results)

  • [Int'l Joint Research] Harvard Medical School/Dana-Farber Cancer Institute/Massachusetts General Hospital(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Dana-Farber Cancer Institute/Massachusetts General Hospital(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Harvard Medical School/Dana-Farber Cancer Institute/Massachusetts General Hospital(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Harvard Medical School/Dana-Farber Cancer Institute/Massachusetts General Hospital(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Heterogeneity and transcriptional drivers of triple-negative breast cancer2023

    • Author(s)
      Jovanovic Bojana、Temko Daniel、Stevens Laura E.、Seehawer Marco、Fassl Anne、Murphy Katherine、Anand Jayati、Garza Kodie、Gulvady Anushree、Qiu Xintao、Harper Nicholas W.、Daniels Veerle W.、Xiao-Yun Huang、Ge Jennifer Y.、Aleckovic Masa、Pyrdol Jason、Hinohara Kunihiko、et al.
    • Journal Title

      Cell Reports

      Volume: 42 Issue: 12 Pages: 113564-113564

    • DOI

      10.1016/j.celrep.2023.113564

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The cancer epigenome: Non‐cell autonomous player in tumor immunity2022

    • Author(s)
      Kato Shinichiro、Maeda Yuka、Sugiyama Daisuke、Watanabe Keisuke、Nishikawa Hiroyoshi、Hinohara Kunihiko
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 3 Pages: 730-740

    • DOI

      10.1111/cas.15681

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Decoding Evolutionary Trajectories of Cancer Drug Resistance2023

    • Author(s)
      Kunihiko Hinohara
    • Organizer
      8th Cancer Research and Drug Development
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] がんの進化と脆弱性2022

    • Author(s)
      日野原邦彦
    • Organizer
      日本癌学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] がん細胞多様性のエピゲノム制御機構2021

    • Author(s)
      日野原邦彦
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 低分化型悪性黒色腫におけるヒストン脱メチル化酵素LSD1依存性の解明 第80回日本癌学会2021

    • Author(s)
      加藤真一郎、日野原邦彦
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
  • [Presentation] ヒストンメチル化酵素 G9a による腫瘍免疫制御機構の解明2021

    • Author(s)
      陳 天羽、加藤 真一郎、日野原 邦彦、西川 博嘉
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
  • [Book] がんの表現型可塑性と治療抵抗性2023

    • Author(s)
      日野原邦彦
    • Total Pages
      6
    • Publisher
      癌と化学療法
    • Related Report
      2022 Research-status Report

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Published: 2020-10-29   Modified: 2025-01-30  

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