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Pathological analysis of hematopoietic failure caused by differentiation abnormalities in mesenchymal stem/stromal cells

Research Project

Project/Area Number 21K16258
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionFoundation for Biomedical Research and Innovation at Kobe

Principal Investigator

Hayashi Yasutaka  公益財団法人神戸医療産業都市推進機構, その他部局等, 研究員 (10854664)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords骨髄微小環境 / 間葉系幹細胞 / 骨髄異形成症候群 / 造血器腫瘍
Outline of Research at the Start

骨髄異形成症候群(MDS)などの造血器腫瘍において、骨髄微小環境(造血幹細胞ニッチ)の変化は腫瘍特有の病態の維持に重要な役割を果たしている。申請者らはモデルマウスを用いた解析により、MDS細胞が代表的なニッチ細胞である間葉系幹細胞(MSC)の分化障害を介して正常造血を抑制することを見出した。本研究ではMDSモデルマウスを用いて単一細胞レベルでMSCを解析・分類し、造血不全の中心となる細胞集団の同定を目指す。さらにMSCの分化異常が造血支持低下に果たす役割を解明し、MDSにおける造血能回復を目標とした新たな治療戦略の礎を築くことを目的とする。

Outline of Final Research Achievements

In Myelodysplastic syndrome (MDS), MDS cells remodel bone marrow mesenchymal stem/stromal cells (MSC) to construct a favorable environment for themselves. In this study, we explored subpopulations that played a crucial role in the pathogenesis of MDS through single-cell analysis of MSCs. Our single-cell RNA-seq data showed remarkable downregulation of niche factors in the Leptin receptor high subpopulation (LepR-high MSCs). We also found suppressed osteoblastic differentiation in LepR-high MSCs derived from MDS, which led to a reduction of osteoblastic subpopulation in MDS. Furthermore, we identified a decreased activity in the enhancer region of the niche factor gene in LepR-high MSCs from MDS. We confirmed the presence of motif sequences for transcription factors that regulate osteoblastic differentiation in this region. These findings suggest that hematopoietic failure in MDS occurs via transcription factors that regulate osteoblastic differentiation.

Academic Significance and Societal Importance of the Research Achievements

本研究は、骨髄異形成症候群(MDS)では骨髄間葉系幹細胞(MSC)の骨芽細胞系列への分化障害を介して造血不全を惹起することを明らかにした。またLeptin受容体遺伝子高発現MSC亜集団はMDSの病態に鍵となる役割を果たし、同亜集団においてニッチ因子の新規エンハンサー領域が疾患による分化抑制に伴い顕著に変動することを見出した。これらの知見はMDSにおけるMSC機能異常を司るマスターレギュレーターを明らかにし、改変MSCを対象とする治療応用につながると期待される。

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 2021

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

  • [Journal Article] Extracellular vesicle-mediated remodeling of the bone marrow microenvironment in myeloid malignancies2023

    • Author(s)
      Hayashi Yasutaka、Nishimura Koutarou、Tanaka Atsushi、Inoue Daichi
    • Journal Title

      International Journal of Hematology

      Volume: 117 Issue: 6 Pages: 821-829

    • DOI

      10.1007/s12185-023-03587-x

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] MDS cells impair osteolineage differentiation of MSCs via extracellular vesicles to suppress normal hematopoiesis.2022

    • Author(s)
      Hayashi Y, Inoue D, et al.
    • Journal Title

      Cell Reports

      Volume: VOLUME 39, ISSUE 6 Issue: 6 Pages: 110805-110805

    • DOI

      10.1016/j.celrep.2022.110805

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 造血器腫瘍における骨髄微小環境制御機構の解析2024

    • Author(s)
      林康貴 , 野村真樹 , 福本未記 ,臧維嘉 , 馬渕洋, 水野聖哉 , 山嵜博未 , 伊藤裕美 , 小池優依 , 井上大地
    • Organizer
      第28回造血器腫瘍研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] MDS cells impair osteolineage differentiation of MSCs via EVs to suppress normal hematopoiesis2022

    • Author(s)
      林 康貴
    • Organizer
      第84回日本血液学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Impaired Osteoblastic Differentiation of MSCs Suppresses Normal Hematopoiesis in MDS2021

    • Author(s)
      林 康貴
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report

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

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