Open Access

Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells

  • Authors:
    • Kazuhiko Kobayashi
    • Rei Jokaji
    • Mayuko Miyazawa‑Hira
    • Shigeyuki Takatsuka
    • Akira Tanaka
    • Kazuhiro Ooi
    • Hiroyuki Nakamura
    • Shuichi Kawashiri
  • View Affiliations

  • Published online on: July 15, 2017     https://doi.org/10.3892/mmr.2017.7012
  • Pages: 3147-3154
  • Copyright: © Kobayashi et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Temporomandibular joint dysfunction (TMD) is a collection of clinical symptoms that involve masticatory muscles and the temporomandibular joint (TMJ). Common symptoms include limited jaw motion and joint sound/pain, along with TMJ disc displacement. TMD is frequently associated with synovitis, a chronic inflammation of the synovium. Fibroblast‑like synovial cells have been identified to produce several inflammatory mediators and may have an important role in the progression of TMJ inflammation. Degradation of the extracellular matrix molecule elastin may lead to the release of bioactive peptides. The present study aimed to explore the role of elastin‑derived peptides (EDPs) in human temporomandibular disorders. Therefore, interleukin‑6 (IL‑6) expression in the synovial fluid obtained from patients with TMD correlated significantly with two clinical parameters, specifically TMJ locking and pain/jaw function on a visual analog scale (VAS). To the best of our knowledge, this is the first study to determine that the concentration of EDPs in synovial fluid from patients with TMD may also be significantly correlated with the duration of TMJ locking, the VAS score and IL‑6 expression. In vitro, EDPs act on human TMJ synovial cells to promote upregulation of IL‑6 and the elastin‑degrading enzyme matrix metalloproteinase‑12 (MMP‑12). The upregulation of IL‑6 and MMP‑12 expression by EDPs may be mediated through elastin‑binding proteins (EBP) and a protein kinase A signalling cascade. These findings suggest a model for inflammation in the TMJ where EDPs are generated by harmful mechanical stimuli, induce both a pro‑inflammatory cascade and increase expression of MMP‑12 through activation of the EBP signalling cascade. This may lead to further increases in EDP levels, establishing a positive feedback loop leading to chronic inflammation in the TMJ. Therefore, significantly elevated levels of EDPs and IL‑6 in the synovial fluid of the TMJ may be indicators of the pathological conditions of the joint.
View Figures
View References

Related Articles

Journal Cover

September-2017
Volume 16 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Kobayashi K, Jokaji R, Miyazawa‑Hira M, Takatsuka S, Tanaka A, Ooi K, Nakamura H and Kawashiri S: Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells. Mol Med Rep 16: 3147-3154, 2017
APA
Kobayashi, K., Jokaji, R., Miyazawa‑Hira, M., Takatsuka, S., Tanaka, A., Ooi, K. ... Kawashiri, S. (2017). Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells. Molecular Medicine Reports, 16, 3147-3154. https://doi.org/10.3892/mmr.2017.7012
MLA
Kobayashi, K., Jokaji, R., Miyazawa‑Hira, M., Takatsuka, S., Tanaka, A., Ooi, K., Nakamura, H., Kawashiri, S."Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells". Molecular Medicine Reports 16.3 (2017): 3147-3154.
Chicago
Kobayashi, K., Jokaji, R., Miyazawa‑Hira, M., Takatsuka, S., Tanaka, A., Ooi, K., Nakamura, H., Kawashiri, S."Elastin‑derived peptides are involved in the processes of human temporomandibular disorder by inducing inflammatory responses in synovial cells". Molecular Medicine Reports 16, no. 3 (2017): 3147-3154. https://doi.org/10.3892/mmr.2017.7012