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Mechanistic Insights into Non-Coding RNA Transcription and Super-Enhancer Activation via Control Region Mutations

Research Project

Project/Area Number 21H02878
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Isoda Takeshi  東京医科歯科大学, 大学院医歯学総合研究科, 講師 (80815225)

Co-Investigator(Kenkyū-buntansha) 高木 正稔  東京医科歯科大学, 大学院医歯学総合研究科, 寄附講座教授 (10406267)
森尾 友宏  東京医科歯科大学, 大学院医歯学総合研究科, 教授 (30239628)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Keywords非コードRNA / ThymoD / エピジェネティクス / 白血病 / 免疫不全症 / メチル化 / 転写 / ゲノムの3次元構造 / ゲノムの3次元構造
Outline of Research at the Start

申請者らはT細胞分化に必須の転写因子BCL11bに注目し、そのスーパーエンハンサー上の非コードRNA転写停止が、細胞の分化異常による疾患や、がんの悪性クローン形成にも関与することを示してきた。本研究では、腫瘍細胞に生じる遺伝子変異の特徴や、ThymoD転写領域におけるR-loop形成と脱メチル化の制御機構、相分離とスーパーエンハンサーの核内局在の影響について明らかにするだけでなく、ヒトThymoDの同定と同領域の変異解析・ゲノムの3次元構造解析を実施することで非コードRNA転写によるエンハンサー活性化機構の解明を飛躍的に推進できると考えている。

Outline of Final Research Achievements

T cells play a central role in immune function. The Bcl11b transcription factor is essential for T cell lineage commitment, and its expression is regulated by the transcription of the non-coding RNA ThymoD (thymocyte differentiation factor) located on a super-enhancer of Bcl11b. Disruption of ThymoD transcription is associated with the development of combined immunodeficiency diseases and T cell lineage hematological malignancy. This study aims to identify the ThymoD region in humans and evaluate how ThymoD transcription regulates methylation, chromatin modifications, and three-dimensional structure at the transcribed region. We identified the ThymoD region in humans and aimed to elucidate the mechanisms of super-enhancer activation. Our findings suggest that transcription is crucial for maintaining the genome structure of ThymoD-BCL11B region and that the genomic structure varies depending on the subtype of leukemia.

Academic Significance and Societal Importance of the Research Achievements

ゲノムの3次元構造の評価は、白血病、そのほかの腫瘍、遺伝性疾患の分類に寄与できると想定される。今回、ヒトThymoD領域を同定でき、5種類のB細胞系・T細胞系白血病細胞株及び正常T細胞を用いた構造解析で、同領域の近接性を示すtopologically associated domain (TAD)に違いがあることが示された。転写に影響する異なる阻害剤を用いた検討で、新生RNA転写を抑制すると、TAD構造および周囲のクロマチン修飾に影響を与えることが判明した。ThymoD転写、DNAメチル化、クロマチン制御、TAD形成の制御機構を理解することで、疾患の分類、治療応用への展開へとつなげていく。

Report

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

    (8 results)

All 2023 2022 2021

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

  • [Journal Article] Myeloid/natural killer (NK) cell precursor acute leukemia as a distinct leukemia type2023

    • Author(s)
      Nishimura Akira、Yokoyama Kazuaki、Naruto Takuya、...、Ishida Yasushi、Takita Junko、Ishikawa Fumihiko、Goto Hiroaki、Morio Tomohiro、Mizutani Shuki、Tojo Arinobu、Takagi Masatoshi
    • Journal Title

      Science Advances

      Volume: 9 Issue: 50 Pages: 50-50

    • DOI

      10.1126/sciadv.adj4407

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Case report: Optimized ruxolitinib-based therapy in an infant with familial hemophagocytic lymphohistiocytosis type 32022

    • Author(s)
      Niizato Daiki、Isoda Takeshi、Mitsuiki Noriko、Kaneko Shuya、Tomomasa Dan、Kamiya Takahiro、Takagi Masatoshi、Imai Kohsuke、Kajiwara Michiko、Shimizu Masaki、Morio Tomohiro、Kanegane Hirokazu
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: 977463-977463

    • DOI

      10.3389/fimmu.2022.977463

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel variants for Glanzmann thrombasthenia manifesting with purpura at birth2022

    • Author(s)
      Eguchi Shiori、Isoda Takeshi、Yamaguchi Asuka、Takagi Masatoshi
    • Journal Title

      Pediatrics International

      Volume: 64 Issue: 1

    • DOI

      10.1111/ped.15149

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Identification of Germline Non-coding Deletions in XIAP Gene Causing XIAP Deficiency Reveals a Key Promoter Sequence2022

    • Author(s)
      Sbihi Zineb、Tanita Kay、Bachelet Camille、Bole Christine、Jabot-Hanin Fabienne、…Isoda Takeshi(24人中20番目)、…、Kanegane Hirokazu、Latour Sylvain
    • Journal Title

      Journal of Clinical Immunology

      Volume: 42 Issue: 3 Pages: 559-571

    • DOI

      10.1007/s10875-021-01188-z

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Successful ruxolitinib administration for a patient with steroid‐refractory idiopathic pneumonia syndrome following hematopoietic stem cell transplantation: A case report and literature review2021

    • Author(s)
      Tomomasa Dan、Isoda Takeshi、Mitsuiki Noriko、Yamashita Motoi、Morishita Aoi、Tomoda Takahiro、Okano Tsubasa、Endo Akifumi、Kamiya Takahiro、Yanagimachi Masakatsu、Imai Kohsuke、Kanegane Hirokazu、Takagi Masatoshi、Morio Tomohiro
    • Journal Title

      Clinical Case Reports

      Volume: 9 Issue: 12 Pages: 1-9

    • DOI

      10.1002/ccr3.5242

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Non-coding RNA transcription and super-enhancer activation facilitate 3D genome structure2023

    • Author(s)
      1.Akira Nishimura, Makiko Sasaki, Riski Muhaimin, Yukie Tanaka, Tomohiro Morio, Masatoshi Takagi, Takeshi Isoda
    • Organizer
      The 14th International Workshop on Advanced Genomics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 非コードRNA転写とスーパーエンハンサー活性化によるゲノムの3次元構造維持機構2022

    • Author(s)
      4.西村聡、佐々木麻起子、高木正稔、磯田健志
    • Organizer
      第81回日本癌学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ロングリードシークエンサーを用いた先天性免疫不全症・白血病発症機構の解明2021

    • Author(s)
      磯田健志
    • Organizer
      令和3年度川野小児医学奨学財団助成研究成果発表会
    • Related Report
      2021 Annual Research Report

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

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