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Elucidation of mandibular condylar cartilage destruction mechanism and establishment of treatment method for osteoarthritis of the temporomandibular joint using cold laser

Research Project

Project/Area Number 18K17256
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57070:Developmental dentistry-related
Research InstitutionHiroshima University

Principal Investigator

Tsuka Yuji  広島大学, 病院(歯), 助教 (50737682)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords顎関節症 / ダイオードレーザー / 疼痛緩和 / 変形性顎関節症 / コールドレーザー / 矯正歯科 / Diode laser / 抗炎症作用 / 半導体レーザー / 超短パルスレーザー / 顎関節 / 治癒促進 / Diode Laser
Outline of Final Research Achievements

we aimed to assess the biological effects of high-frequency diode laser irradiation on Interleukin (IL) -1β-induced chondrocyte inflammation in an in vitro osteoarthritis (OA) model. Normal Human Articular Chondrocyte-Knee (NHAC-Kn) cells were stimulated with human recombinant IL-1β and irradiated with a laser. Laser irradiation significantly reduced the IL-1β-induced expression of IL-1β, MMP-1, and MMP-3. Laser irradiation decreased the protein expression levels of inflammatory cytokines in IL-1β-treated chondrocytes. Also decreased phosphorylation, nuclear translocation, and DNA binding activity of NF-κB in IL-1β-treated state, but the irradiation alone did not affect NF-κB activity. This mechanism can be considered as the inhibition of NF-κB activity. Laser irradiation might inhibit IL-1β-induced inflammation in normal human articular chondrocytes through NF-κB regulation. These results indicate that high-frequency diode laser irradiation can reduce inflamatiom in OA.

Academic Significance and Societal Importance of the Research Achievements

歯科臨床において、顎関節症を伴う患者に遭遇することがしばしばある。変形性顎関節症(TMJ-OA)は、治療が困難な疾患である。今回の実験から、スーパーパルスレーザー照射が、NF-κB調節を介して、正常なヒト関節軟骨細胞におけるIL-1β誘発炎症を阻害することが確認され、これらの結果は、スーパーレーザー照射がOAの炎症を軽減できる可能性を示している。これは、レーザー照射による作用機序の一部が解明されたとともに、本研究で用いたレーザーは生体組織への熱的損傷がほとんどなく安全性の高いものであり、顎関節の治療しいてはTMJ-OAに対する治療の有効性が確立されれば、社会的にもとても意義のあることである。

Report

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

    (6 results)

All 2020 2019 2018

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

  • [Journal Article] High-Frequency Near-Infrared Diode Laser Irradiation Attenuates IL-1β-Induced Expression of Inflammatory Cytokines and Matrix Metalloproteinases in Human Primary Chondrocytes.2020

    • Author(s)
      Sakata S, Kunimatsu R, Tsuka Y, Nakatani A, Hiraki T, Gunji H, Hirose N, Yanoshita M, Putranti NAR, Tanimoto K.
    • Journal Title

      J Clin Med

      Volume: 24 Issue: 3 Pages: 881-881

    • DOI

      10.3390/jcm9030881

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Examination of the effect of combined use of Nd: YAG laser irradiation and mechanical force loading on bone metabolism using cultured human osteoblasts2020

    • Author(s)
      Tsuka Y., Kunimatsu R., Gunji H., Abe T., Concepcion M C., Nakajima K., Kimura A., Hiraki T., Nakatani A., Tanimoto K
    • Journal Title

      J Laser Med Sci

      Volume: 11 Issue: 2 Pages: 138-143

    • DOI

      10.34172/jlms.2020.24

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of Nd:YAG low level laser irradiation on cultured human osteoblasts migration and ATP production: in vitro study.2019

    • Author(s)
      Tsuka Y, Kunimatsu R, Gunji H, Nakajima K, Kimura A, Hiraki T, Nakatani A, Tanimoto K
    • Journal Title

      Lasers in Medical Science

      Volume: 34(1) Issue: 1 Pages: 55-60

    • DOI

      10.1007/s10103-018-2586-6

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular biological and histological effects of Er:YAG laser irradiation on tooth movement2019

    • Author(s)
      Tsuka Y, Kunimatsu R, Gunji H, Nakajima K, Hiraki T, Nakatani A, Tanimoto K
    • Journal Title

      Journal of Oral Science

      Volume: 61 Issue: 1 Pages: 67-72

    • DOI

      10.2334/josnusd.17-0472

    • NAID

      130007626610

    • ISSN
      1343-4934, 1880-4926
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Effect of Er:YAG laser irradiation and mechanical force on primary human gingival fibroblasts.2019

    • Author(s)
      Yuji Tsuka, Ryo Kunimatsu, Hidemi Gunji, Takaharu Abe, Cynthia Concepción Medina, Kengo Nakajima, Tomoka Hiraki, Ayaka Nakatani, Kotaro Tanimoto.
    • Organizer
      the 52nd Annual Scientific Congress of the Korean Association of Orthodontists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Nd:YAG laser irradiation and Mechanical force on osteoblast-like cells.2018

    • Author(s)
      Yuji Tsuka, Ryo Kunimatsu, Hidemi Gunji, Abe Takaharu, Cynthia Concepcion Medina, Kengo Nakajima, Aya Kimura, Tomoka Hiraki, Ayaka Nakatani, Kotaro Tanimoto
    • Organizer
      2018 Taiwan International Orthodontic Forum
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2021-02-19  

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