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Comprehensive exploration of intracellular factors essential for HSC regulation via the CXCL12-CXCR4 axis

Research Project

Project/Area Number 21K08393
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 InstitutionKyoto University

Principal Investigator

Aoki Kazunari  京都大学, 医生物学研究所, 助教 (30618020)

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)
KeywordsCXCL12 / CXCR4 / cBAF / SMARCA4 / ARID1A / クロマチン / RUNX1 / 転写制御 / CRISPR / 造血幹細胞 / ニッシェ
Outline of Research at the Start

本研究は「in vivoでの造血幹細胞の骨髄へのホーミング・骨髄での維持においてCXCL12の生理的受容体CXCR4の下流でどのような細胞内分子が機能しているか」を明らかにする。CXCL12-CXCR4軸は造血幹細胞の骨髄へのホーミング・骨髄での維持に必須であるが、CXCR4の下流でどのような細胞内分子が機能しているかは十分明らかにされていない。ゲノムワイドCRISPRスクリーニング法を用いて、CXCR4の下流で機能している細胞内分子を同定する。本研究成果は、造血幹細胞・白血病幹細胞の維持機構の解明、新たな造血幹細胞動員法や造血幹細胞ホーミング効率改善法の確立などに役立つ可能性が期待される。

Outline of Final Research Achievements

It remains unclear how CXCL12 responsiveness is regulated in hematopoietic stem cells and acute leukemic cells. Using a CRISPR screen, we discovered that cBAF regulates the migratory response of human T-ALL cells to CXCL12. cBAF maintains chromatin accessibility genome-widely at RUNX1 binding sites, ensuring RUNX1 binding at these sites, and is required for expression of RUNX1-regulated genes, such as CXCR4 and CDK6; therefore, cBAF inhibition negatively impacts migratory response toward CXCL12 and cell proliferation. These results suggest cBAF as a promising therapeutic target.

Academic Significance and Societal Importance of the Research Achievements

cBAFは、T-ALL細胞のCXCL12応答性と細胞自律的増殖を制御しており、T-ALLの有望な治療標的の一つである。急性白血病と呼ばれる血液腫瘍のうち、成人では約5%、小児では約10-15%がT-ALLに分類される。約80%の患者さんで長期生存率が得られているが、残りの患者さんでは治療抵抗性である。今後、有効かつ安全なcBAF機能抑制薬が開発され、T-ALL患者さんの予後の改善に寄与することが期待される。

Report

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

    (5 results)

All 2024 2023 2022

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

  • [Journal Article] Canonical BAF complex regulates the oncogenic program in human T-cell acute lymphoblastic leukemia2024

    • Author(s)
      Aoki Kazunari、Hyuga Mizuki、Tarumoto Yusuke、Nishibuchi Gohei、Ueda Atsushi、Ochi Yotaro、Sugino Seiichi、Mikami Takashi、Kobushi Hirokazu、Kato Itaru、Akahane Koshi、Inukai Takeshi、Takaori-Kondo Akifumi、Takita Junko、Ogawa Seishi、Yusa Kosuke
    • Journal Title

      Blood

      Volume: 143 Issue: 7 Pages: 604-618

    • DOI

      10.1182/blood.2023020857

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Significance of Omitting Day 11 Mini-Dose Methotrexate for GVHD Prophylaxis After Unrelated Bone Marrow Transplantation2023

    • Author(s)
      Nakamura Naokazu、Wada Fumiya、Kondo Tadakazu、Aoki Kazunari、Arai Yasuyuki、Mizumoto Chisaki、Kanda Junya、Kitawaki Toshio、Yamashita Kouhei、Takaori-Kondo Akifumi
    • Journal Title

      Transplantation and Cellular Therapy

      Volume: 29 Issue: 2 Pages: 119.e1-119.e7

    • DOI

      10.1016/j.jtct.2022.11.006

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Runx1 and Runx2 inhibit fibrotic conversion of cellular niches for hematopoietic stem cells2022

    • Author(s)
      Omatsu Yoshiki、Aiba Shota、Maeta Tomonori、Higaki Kei、Aoki Kazunari、Watanabe Hitomi、Kondoh Gen、Nishimura Riko、Takeda Shu、Chung Ung-il、Nagasawa Takashi
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 2654-2654

    • DOI

      10.1038/s41467-022-30266-y

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Canonical BAF complex is essential for the RUNX1-driven oncogenic transcriptional program in human T-cell acute lymphoblastic leukemia2023

    • Author(s)
      Aoki Kazunari、Hyuga Mizuki、Tarumoto Yusuke、Nishibuchi Gohei、Ochi Yotaro、Sugino Seiichi、Mikami Takashi、Kobushi Hirokazu、Kato Itaru、Akahane Koshi、Inukai Takeshi、Takaori-Kondo Akifumi、Takita Junko、Ogawa Seishi、Yusa Kosuke
    • Organizer
      The 13th JSH International Symposium in Tsukuba
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Canonical BAF complex is essential for the RUNX1-driven oncogenic transcriptional program in human T-cell acute lymphoblastic leukemia2023

    • Author(s)
      Aoki Kazunari、Hyuga Mizuki、Tarumoto Yusuke、Nishibuchi Gohei、Ochi Yotaro、Sugino Seiichi、Mikami Takashi、Kobushi Hirokazu、Kato Itaru、Akahane Koshi、Inukai Takeshi、Takaori-Kondo Akifumi、Takita Junko、Ogawa Seishi、Yusa Kosuke
    • Organizer
      The 82th Annual Meeting of the JCA
    • Related Report
      2023 Annual Research Report

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

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