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Generating novel therapeutic strategies to rejuvenate bone repair capacity

Research Project

Project/Area Number 20K18023
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionUniversity of Toyama

Principal Investigator

Yahara Yasuhito  富山大学, 学術研究部医学系, 助教 (60456390)

Project Period (FY) 2020-04-01 – 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: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords破骨細胞 / 造血幹細胞 / 卵黄嚢 / マクロファージ / 骨傷 / 老化 / 骨形成 / 骨折 / 骨折修復 / 骨修復能 / 若返り / 骨傷治療
Outline of Research at the Start

「老化」に伴って骨修復能は低下する。骨修復能の低下は、骨折後の骨癒合不全の原因となるだけでなく、身体機能の低下を引き起こし問題となる。しかし、老化によって骨修復能が低下する機序は分かっていない。我々は、若年マウスのマクロファージが分泌するLipoprotein receptor-related protein 1 (Lrp1)が老年マウスの骨修復能を「若返らせる」ことを見出し報告してきた。本研究では、経年的に変化するマクロファージの構成や機能、その分泌蛋白に着目し、骨修復能を増強しえる新たなシステムを構築し、骨修復能の「若返り」を目指した骨傷治療に対する新規治療戦略の創出を目指す。

Outline of Final Research Achievements

Bone repair capacity declines with aging, but the mechanism of this phenomenon is unknown. As a result of this study, we newly discovered the existence of fetal yolk sac-derived osteoclasts that contribute to bone repair. Macrophages generated in the fetal yolk sac migrate to bone during the embryonic period and differentiate into osteoclasts that are responsible for bone resorption. Osteoclasts derived from fetal macrophages resided in postnatal bone for a long-term and were involved in bone homeostasis. Furthermore, once bone injury occurs, they migrate to the local area during the subacute and chronic phases of the repair process and participate in bone remodeling after injury. Fetal-derived osteoclasts may be a factor influencing the transition of bone remodeling capacity throughout life.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果として、マクロファージおよび破骨細胞には、造血幹細胞と胎児卵黄嚢を起源とする二種類の細胞集団が存在することを世界に先駆けて発見し報告した。起源の異なる二つの破骨細胞は複雑に細胞融合を繰り返しながら、相互に影響しあうことで、骨の再構築を駆動し、その恒常性維持に関わっていた。新しい破骨細胞分画が発見されたことで、破骨細胞の活性化や機能障害によって発症する疾患の病態解明につながる重要な成果と考えられた。

Report

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

    (14 results)

All 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (7 results) (of which Invited: 4 results)

  • [Int'l Joint Research] Duke University(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Duke大学医学部整形外科(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] The origins and roles of osteoclasts in bone development, homeostasis and repair2022

    • Author(s)
      Yahara Yasuhito、Nguyen Tuyet、Ishikawa Koji、Kamei Katsuhiko、Alman Benjamin A.
    • Journal Title

      Development

      Volume: 149 Issue: 8 Pages: 1-13

    • DOI

      10.1242/dev.199908

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Monocyte/Macrophage Lineage Cells From Fetal Erythromyeloid Progenitors Orchestrate Bone Remodeling and Repair2021

    • Author(s)
      Yahara Yasuhito、Ma Xinyi、Gracia Liam、Alman Benjamin A.
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 9

    • DOI

      10.3389/fcell.2021.622035

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Yolk-sac-derived macrophages progressively expand in the mouse kidney with age2020

    • Author(s)
      Ide Shintaro、Yahara Yasuhito、Kobayashi Yoshihiko、Strausser Sarah A、Ide Kana、Watwe Anisha、Xu-Vanpala Shengjie、Privratsky Jamie R、Crowley Steven D、Shinohara Mari L、Alman Benjamin A、Souma Tomokazu
    • Journal Title

      eLife

      Volume: 9

    • DOI

      10.7554/elife.51756

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Erythromyeloid progenitors give rise to a population of osteoclasts that contribute to bone homeostasis and repair2020

    • Author(s)
      Yahara Yasuhito、Barrientos Tomasa、Tang Yuning J.、Puviindran Vijitha、Nadesan Puviindran、Zhang Hongyuan、Gibson Jason R.、Gregory Simon G.、Diao Yarui、Xiang Yu、Qadri Yawar J.、Souma Tomokazu、Shinohara Mari L.、Alman Benjamin A.
    • Journal Title

      Nature Cell Biology

      Volume: 22 Issue: 1 Pages: 49-59

    • DOI

      10.1038/s41556-019-0437-8

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 胎児卵黄嚢erythromyeloid progenitorsに由来する破骨細胞の発見2020

    • Author(s)
      箭原康人, 川口善治
    • Journal Title

      臨床雑誌整形外科

      Volume: 71 Pages: 996-996

    • Related Report
      2020 Research-status Report
  • [Presentation] 炎症性骨代謝に関する新しい潮流 胎児卵黄嚢造血に由来する破骨細胞の同定2021

    • Author(s)
      箭原康人
    • Organizer
      第64回秋季日本歯周病学会学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 骨恒常性維持と病態に関与する破骨細胞の起源多様性2021

    • Author(s)
      箭原康人
    • Organizer
      第17回Bone Biology Forum
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 破骨細胞の起源多様性に基づく骨恒常性維持機構の解明2020

    • Author(s)
      箭原 康人, 川口 善治
    • Organizer
      第38回日本骨代謝学会学術集会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 骨軟骨領域における修復・再生研究の進歩 Single-cell RNA sequencingが解き明かす骨修能関連マクロファージの多様性とその変遷2020

    • Author(s)
      箭原 康人, 川口 善治
    • Organizer
      第38回日本骨代謝学会学術集会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Single-cell RNA sequencingによる経年的な骨修復能低下メカニズムの解明2020

    • Author(s)
      箭原 康人, 亀井 克彦, 牧野 紘士, 渡邉 健太, 野上 真紀子, 関 庄二, 川口 善治
    • Organizer
      日本整形外科学会基礎学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] Single-cell RNA sequencingを用いた,胎児卵黄嚢および造血幹細胞由来破骨細胞前駆細胞の遺伝子プロファイルの比較検討2020

    • Author(s)
      箭原 康人, 亀井 克彦, 牧野 紘士, 渡邉 健太, 野上 真紀子, 関 庄二, 川口 善治
    • Organizer
      日本整形外科学会基礎学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] scRNA-seqとRNA velocityによる細胞の分化過程シミュレーション 卵黄嚢由来破骨細胞は造血幹細胞非依存的に発生する2020

    • Author(s)
      箭原 康人, 川口 善治, Alman Benjamin
    • Organizer
      日本整形外科学会学術総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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