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Elucidation of cellular senescence in bone microenvironment

Research Project

Project/Area Number 18K09825
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57060:Surgical dentistry-related
Research InstitutionHyogo Medical University

Principal Investigator

TAKAOKA KAZUKI  兵庫医科大学, 医学部, 准教授 (60373122)

Co-Investigator(Kenkyū-buntansha) 山根木 康嗣  兵庫医科大学, 医学部, 講師 (00434944)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords骨微小環境 / 破骨細胞 / 老化 / エクソソーム / TGF-β / 歯学 / 口腔外科学 / 骨代謝
Outline of Final Research Achievements

Aging cells not only cease growth, but also secrete various proteins such as inflammatory cytokines. This secretory phenomenon is called the senescence-associated secretory phenotype (SASP). Our results suggest that osteoclast precursors gradually lose their self-renewal and regenerative potentials, and cannot differentiate into osteoclasts while aging. As a result, the number of senescent osteoclast precursors in the bone microenvironment may continue to increase because many osteoclast precursors are unable to differentiate into osteoclasts. Senescent osteoclast precursors increase production of SASP factors (IL-6, TNF-α, and NO) and the number of exosomes, and then release iNOS in exosomes.

Academic Significance and Societal Importance of the Research Achievements

老化破骨前駆細胞は、単に細胞増殖を停止しているのではなく、炎症性サイトカインなどのタンパク質を分泌していることが明らかとなった。また、老化破骨前駆細胞からのエクソソームといわれる小胞(様々なタンパク質やRNAを含んでいる)の放出数が増加し、エクソソームとして炎症性物質を放出することは、遠隔における炎症にも関与している可能性が考えられた。加齢は骨リモデリング変化による骨量減少性疾患や骨破壊性疾患を生じる原因となるが、その病態解明とその対策や治療の発展につながるのではないかと考えている。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (2 results)

  • [Journal Article] Osteonecrosis of the jaws caused by bisphosphonate treatment and oxidative stress in mice2019

    • Author(s)
      Tamaoka J, Takaoka K, Hattori H, Ueta M, Maeda H, Yamamura M, Yamanegi K, Noguchi K, Kishimoto H
    • Journal Title

      Experimental and Therapeutic Medicine

      Volume: 17 Pages: 1440-1448

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of TGF-β1 on the migration and morphology of RAW264.7 cells in vitro2019

    • Author(s)
      Ueta M, Takaoka K, Yamamura M, Maeda H, Tamaoka J, Nakano Y, Noguchi K, Kishimoto H
    • Journal Title

      Molecular Medicine Reports

      Volume: 20 Pages: 4331-4339

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 破骨細胞前駆細胞の複製老化におけるSASPへの影響2020

    • Author(s)
      服部洋一, 高岡一樹, 上田美帆, 玉岡丈二, 押谷将之, 野口一馬, 岸本裕充
    • Organizer
      第74回日本口腔科学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] RAW264.7細胞における細胞老化とSASPの分析2020

    • Author(s)
      服部洋一, 高岡一樹, 上田美帆, 玉岡丈二, 押谷将之, 野口一馬, 岸本裕充
    • Organizer
      第65回日本口腔外科学会総会・学術大会
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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