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Elucidation of the integrin-dependent signaling pathway in hematopoietic stem cell development.

Research Project

Project/Area Number 19K06438
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42030:Animal life science-related
Research InstitutionKanazawa University

Principal Investigator

Kobayashi Isao  金沢大学, 生命理工学系, 准教授 (30774757)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords造血幹細胞 / ゼブラフィッシュ / 分化 / シグナル伝達 / 発生 / 血管芽細胞 / インテグリン / 細胞間相互作用
Outline of Research at the Start

本研究では胚発生期における造血幹細胞の形成過程において、インテグリンのシグナル伝達経路がどのように関与しているのかをゼブラフィッシュ胚を用いて解明する。造血幹細胞は血管内皮細胞との共通前駆細胞である血管芽細胞より派生することが知られている。本研究では、インテグリンの下流で機能している可能性のあるLrrc15という細胞表面タンパクに注目し、ゼブラフィッシュ胚を用いたライブイメージング解析などを駆使することによって、インテグリンおよびLrrc15が血管芽細胞においてどのような役割を果たすのかを調べると共に、インテグリンシグナルの増強によって造血幹細胞を増幅させることができるかについての検討を行う。

Outline of Final Research Achievements

During embryonic development, hematopoietic stem cells (HSCs) are formed from angioblasts, which are common progenitors of vascular endothelial cells. However, the detailed molecular mechanism of their fate determination has remained unclear. In this study, we investigated the role of integrin signaling pathways in angioblasts using zebrafish, and found that a small GTPase, RhoH, is essential for HSC formation. Furthermore, we revealed a novel molecular mechanism by which RhoH promotes HSC formation via suppressing Zap70. The signaling pathway of integrin-RhoH revealed in this study may play an important role in HSC formation.

Academic Significance and Societal Importance of the Research Achievements

造血幹細胞をヒトiPS細胞から分化誘導することができれば、骨髄移植の代替法となるが、未だにiPS細胞から造血幹細胞への分化誘導は困難である。iPS細胞は初期胚の多能性細胞と類似の特徴を持つことから、胚発生期における造血幹細胞の形成過程を生体外で模倣できれば、iPS細胞から造血幹細胞を誘導することが可能になると考えられている。本研究で見出したRhoHは造血幹細胞の形成に重要な分子であることから、今後iPS細胞へ応用することで、造血幹細胞の分化誘導法の確立に貢献できる可能性がある。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2020

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (7 results) (of which Invited: 1 results)

  • [Journal Article] Jagged 2b induces intercellular signaling within somites to establish hematopoietic stem cell fate in zebrafish2022

    • Author(s)
      Yukino Wada, Hikaru Tsukatani, Chihiro Kuroda, Yurika Miyazaki, Miku Otoshi, Isao Kobayashi
    • Journal Title

      Development

      Volume: 149 Issue: 7

    • DOI

      10.1242/dev.200339

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hematopoietic Cell Isolation by Antibody-Free Flow Cytometry in the Zebrafish Embryo2022

    • Author(s)
      Katsuhiro Konno, Jingjing Kobayashi-Sun, Fumio Arai, Isao Kobayashi, Daisuke Sugiyama
    • Journal Title

      Methods in Molecular Biology

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Non-aqueous, zwitterionic solvent as an alternative for dimethyl sulfoxide in the life sciences2020

    • Author(s)
      Kosuke Kuroda, Tetsuo Komori, Kojiro Ishibashi, Takuya Uto, Isao Kobayashi, Riki Kadokawa, Yui Kato, Kazuaki Ninomiya, Kenji Takahashi, Eishu Hirata
    • Journal Title

      Communications Chemistry

      Volume: 3 Issue: 1 Pages: 163-163

    • DOI

      10.1038/s42004-020-00409-7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Melatonin suppresses both osteoblast and osteoclast differentiation through repression of epidermal Erk signaling in the zebrafish scale2020

    • Author(s)
      Kobayashi-Sun Jingjing、Suzuki Nobuo、Hattori Atsuhiko、Yamaguchi Masaaki、Kobayashi Isao
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 530 Issue: 4 Pages: 644-650

    • DOI

      10.1016/j.bbrc.2020.07.075

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Uptake of Osteoblast-Derived Extracellular Vesicles Promotes the Differentiation of Osteoclasts in the Zebrafish Scale2020

    • Author(s)
      Jingjing Kobayashi-Sun, Shiori Yamamori, Mao Kondo, Junpei Kuroda, Mika Ikegame, Nobuo Suzuki, Kei-Ichiro Kitamura, Atsuhiko Hattori, Masaaki Yamaguchi, Isao Kobayashi.
    • Journal Title

      Communications Biology

      Volume: 3 Issue: 1 Pages: 190-190

    • DOI

      10.1038/s42003-020-0925-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dual role of Jam3b in early hematopoietic and vascular development.2020

    • Author(s)
      Kobayashi I, Kobayashi-Sun J, Hirakawa Y, Ouchi M, Yasuda K, Kamei H, Fukuhara S, Yamaguchi M.
    • Journal Title

      Development

      Volume: 147 Issue: 1 Pages: 181040-181040

    • DOI

      10.1242/dev.181040

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Jagged-2b triggers intercellular signaling in the somite to establish the hematopoietic stem cell fate in zebrafish2022

    • Author(s)
      Yukino Wada, Isao Kobayashi
    • Organizer
      The 50th Annual Scientific Meeting of the ISEH-Society for Hematology and Stem Cells
    • Related Report
      2021 Annual Research Report
  • [Presentation] 母性由来Abcg2aは背側化を抑制して造血・血管発生を促進する2022

    • Author(s)
      藤田涼平, 大内円, 小林静静, 小林功
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ゼブラフィッシュにおいて古典的Wntシグナルの阻害は造血幹細胞を維持する2022

    • Author(s)
      木村昂暉, 山森汐莉, 近藤真央, 小林功
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Jagged-2bは体節内細胞間シグナル伝達を介して造血幹細胞の発生を制御する2022

    • Author(s)
      和田友紀乃, 塚谷光, 黒田千央, 宮崎由里圭, 小林功
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Inhibition of canonical Wnt signaling maintains hematopoietic stem cells in zebrafish2022

    • Author(s)
      Koki Kimura, Shiori Yamamori, Mao Kondo, Isao Kobayashi
    • Organizer
      第27回小型魚類研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Sinusoidal endothelium is a key component of hematopoietic niches in the zebrafish kidney2020

    • Author(s)
      Mao Kondo, Shiri Yamamori, Isao Kobayashi
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Developing hematopoietic stem cells acquire adaptability to the final hematopoietic niche2020

    • Author(s)
      Shiori Yamamori, Koki Kimura, Mao Kondo, Makoto Taniguchi, Isao Kobayashi
    • Organizer
      第26回小型魚類研究会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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