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The effect of mechanical stress on enthesis homeostasis in a rat Achilles enthesis organ culture model

Research Project

Project/Area Number 18K16662
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionOkayama University

Principal Investigator

Saito Taichi  岡山大学, 医歯薬学域, 助教 (70644384)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsエンテーシス / 再生医療 / メカニカルストレス
Outline of Final Research Achievements

We used ex vivo models in organ cultures of rat Achilles tendons with calcaneus including the enthesis. The organ was attached to a mechanical stretching apparatus that can conduct cyclic tensile strain. We made the models of 1‐mm elongation (0.5 Hz, 3% elongation), 2-mm elongation (0.5 Hz, 5% elongation), and no stress. The results of this study suggested that 1‐mm elongation can maintain the structure of the enthesis, while 2‐mm elongation promotes degenerative changes.

Academic Significance and Societal Importance of the Research Achievements

腱付着部は組織学的にも大きく異なる運動器を連結している重要な構造であり、故にその損傷は大きな問題となり、治療介入が必要とされる。しかし残念なことに、従来の保存療法・手術療法を含めた治療法ではエンテーシスの正常構造を再構築できず、治療後に再断裂が生じることが問題点として挙げられる。そこで再生医療の発展が望まれるが、そのためには組織発生・変性メカニズムについて理解する必要がある。本研究によりメカニカルストレスの強弱が直接的に腱付着部の構造変化に関与することが明らかとなった。今回解明されたメカニカルストレスとの関係が今後腱着部の病態解明、再生治療の一助となりうる。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (3 results)

All 2020 2019

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] The effect of mechanical stress on enthesis homeostasis2020

    • Author(s)
      Taichi Saito, Aki Yoshida, Satoshi Nezu, Minami Matsuhashi, Yasunori Shimamura, Takayuki Furumatsu, Keiichiro Nishida, Toshifumi Ozaki
    • Organizer
      American Academy of Orthopaedic Surgeons 2020 Annual Meeting
    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 腱骨接合部の恒常性におけるメカニカルストレスの影響2019

    • Author(s)
      斎藤太一 根津智史 松橋美波 吉田晶 島村安則 古松毅之 西田圭一郎 尾崎敏文
    • Organizer
      第34回日本整形外科基礎学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] The effect of mechanical stress on enthesis homeostasis2019

    • Author(s)
      Taichi Saito, Aki Yoshida, Satoshi Nezu, Minami Matsuhashi, Yasunori Shimamura, Takayuki Furumatsu, Keiichiro Nishida, Toshifumi Ozaki
    • Organizer
      Orthopaedic Research Society 2019 Annual Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2024-01-30  

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