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Analysis of Signaling Pathways Regulating Intracellular Transport in Age-Related Temporomandibular Joint Osteoarthritis

Research Project

Project/Area Number 21K17035
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionNiigata University

Principal Investigator

KITAMI MEGUMI  新潟大学, 医歯学系, 特任助教 (00834772)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords顎関節 / 一次繊毛 / 軟骨細胞 / mTOR / 老化 / mTOR / プライマリーシリア / 変形性顎関節症
Outline of Research at the Start

高齢者の変形性顎関節症の原因は、組織の粘弾性の低下によるものであると考えられているが、その発症メカニズムは未解明である。
プライマリーシリアは、細胞外環境を感受するアンテナ様の細胞小器官である。
申請者らはこれまでの研究で、シリア欠失マウスの下顎頭軟骨細胞において基質の分泌能が低下することを報告した。
本研究では老齢マウスの下顎頭軟骨細胞におけるシリアの出現ならびに細胞外基質の分泌過程を解析し、さらに基質の分泌を制御するシグナル伝達経路を明らかにすることにより、加齢による変形性顎関節症の発症メカニズムを解明し、その予防を含む新たな治療法の開発に寄与する。

Outline of Final Research Achievements

Although aging is one of the most common causes of TMJ-OA, the mechanism of age-related cartilage degradation is not clear. The elasticity of condylar cartilage deteriorates as proteoglycans decrease with age.
In this study, we found that mTOR signaling is attenuated in correlation with the decrease in proteoglycan production in condylar cartilage with age and that the expression of primary cilia is decreased. Furthermore, inhibition of mTOR signaling in condylar cartilage reduced the frequency of primary cilia, resulting in age-related deterioration of condylar cartilage.
Taken together, loss of primary cilia due to a decrease in mTOR signaling correlated with age-related deterioration of condylar cartilage.

Academic Significance and Societal Importance of the Research Achievements

変形性顎関節症は顎関節の構成組織である下顎頭軟骨の破壊を特徴とし、高齢者に多くみられる。加齢と共に関節軟骨の緩衝能が劣化することが報告されているが、加齢による緩衝能劣化のメカニズムは依然として明らかになっていない。
本研究では加齢に伴う顎関節の形態変化と、細胞機能を維持するシグナル受容体である一次繊毛の発現変化が相関することを示した。また、加齢とともにmTORシグナルの減衰が生じること、さらには顎関節においてmTORシグナルは一繊次毛を正に制御することを明らかにした。本研究は顎関節の老化メカニズムの一端を明らかにすることで、変形性顎関節症を予防する新たな戦略となる研究である。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022 Other

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

  • [Int'l Joint Research] UT Health Science Center at Houston(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] UT Health Science Center at Houston(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UT Health Science Center at Houston(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] A loss of primary cilia by a reduction in mTOR signaling correlates with age-related deteriorations in condylar cartilage2024

    • Author(s)
      Kitami Megumi、Kaku Masaru、Thant Lay、Maeda Takeyasu
    • Journal Title

      GeroScience

      Volume: - Issue: 6 Pages: 5995-6007

    • DOI

      10.1007/s11357-024-01143-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Sparc knockout on the extracellular matrix of mouse periodontal ligament cells2024

    • Author(s)
      Arai Moe、Kaku Masaru、Thant Lay、Kitami Megumi、Ono Yoshiki、Dobashi Azusa、Iwama Hajime、Mizukoshi Masaru、Kitami Kohei、Matsumoto Masaki、Saito Isao、Uoshima Katsumi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 692 Pages: 149364-149364

    • DOI

      10.1016/j.bbrc.2023.149364

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multiomics analysis of cultured mouse periodontal ligament cell-derived extracellular matrix2024

    • Author(s)
      Kaku Masaru、Thant Lay、Dobashi Azusa、Ono Yoshiki、Kitami Megumi、Mizukoshi Masaru、Arai Moe、Iwama Hajime、Kitami Kohei、Kakihara Yoshito、Matsumoto Masaki、Saito Isao、Uoshima Katsumi
    • Journal Title

      Scientific Reports

      Volume: 14 Issue: 1 Pages: 354-354

    • DOI

      10.1038/s41598-023-51054-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anti-inflammatory activity of 2-methoxy-4-vinylphenol involves inhibition of lipopolysaccharide-induced inducible nitric oxidase synthase by heme oxygenase-12023

    • Author(s)
      Asami Eri、Kitami Megumi、Ida Takako、Kobayashi Tadaharu、Saeki Makio
    • Journal Title

      Immunopharmacology and Immunotoxicology

      Volume: - Issue: 5 Pages: 1-8

    • DOI

      10.1080/08923973.2023.2197141

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temporospatial regulation of intraflagellar transport is required for the endochondral ossification in mice2022

    • Author(s)
      Yamaguchi Hiroyuki、Kitami Megumi、Uchima Koecklin Karin H.、He Li、Wang Jianbo、Lagor William R.、Perrien Daniel S.、Komatsu Yoshihiro
    • Journal Title

      Developmental Biology

      Volume: 482 Pages: 91-100

    • DOI

      10.1016/j.ydbio.2021.12.004

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extracellular Matrix-Oriented Proteomic Analysis of Periodontal Ligament Under Mechanical Stress2022

    • Author(s)
      Thant Lay、Kaku Masaru、Kakihara Yoshito、Mizukoshi Masaru、Kitami Megumi、Arai Moe、Kitami Kohei、Kobayashi Daiki、Yoshida Yutaka、Maeda Takeyasu、Saito Isao、Uoshima Katsumi、Saeki Makio
    • Journal Title

      Frontiers in Physiology

      Volume: 13 Pages: 899699-899699

    • DOI

      10.3389/fphys.2022.899699

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Involvement of Rab11 in osteoblastic differentiation: Its up-regulation during the differentiation and by tensile stress2022

    • Author(s)
      Thant Lay、Kakihara Yoshito、Kaku Masaru、Kitami Megumi、Kitami Kohei、Mizukoshi Masaru、Maeda Takeyasu、Saito Isao、Saeki Makio
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 624 Pages: 16-22

    • DOI

      10.1016/j.bbrc.2022.07.061

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] プライマリーシリアを介した下顎頭軟骨老化メカニズムの探索2022

    • Author(s)
      北見恩美、加来賢
    • Organizer
      第64回歯科基礎医学会学術大会
    • Related Report
      2022 Research-status Report

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

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