Functional role of HSP47 in the periodontal ligament subjected to occlusal overload in mice

Hiroaki Mimura, Tatsuo Takaya, Saeka Matsuda, Keisuke Nakano, Rina Muraoka, Mihoko Tomida, Norimasa Okafuji, Takeo Fujii, Toshiyuki Kawakami

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We carried out an experiment to induce traumatic occlusion in mice periodontal tissue and analyzed the expression of HSP47. Continuous traumatic occlusion resulted to damage and remodeling of periodontal ligament as well as increase in osteoclasts and bone resorption. Four days after traumatic occlusion, osteoclasts did not increase but Howship’s lacunae became enlarged. That is, the persistent occlusal overload can destroy collagen fibers in the periodontal ligament. This was evident by the increased in HSP47 expression with the occlusal overload. HSP47 is maintained in fibroblasts for repair of damaged collagen fibers. On the other hand, osteoclasts continue to increase although the load was released. The osteoclasts that appeared on the alveolar bone surface were likely due to sustained activity. The increase in osteoclasts was estimated to occur after load application at day 4. HSP47 continued to increase until day 6 in experiment 2 but then reduced at day 10. Therefore, HSP47 appears after a period of certain activities to repair damaged collagen fibers, and the activity was returned to a state of equilibrium at day 30 with significantly diminished expression. Thus, the results suggest that HSP47 is actively involved in homeostasis of periodontal tissue subjected to occlusal overload.

Original languageEnglish
Pages (from-to)248-254
Number of pages7
JournalInternational journal of medical sciences
Volume13
Issue number4
DOIs
Publication statusPublished - Feb 20 2016

Keywords

  • HSP47
  • Immunohistochemistry
  • Mouse
  • Occlusal trauma
  • Periodontal ligament

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'Functional role of HSP47 in the periodontal ligament subjected to occlusal overload in mice'. Together they form a unique fingerprint.

  • Cite this

    Mimura, H., Takaya, T., Matsuda, S., Nakano, K., Muraoka, R., Tomida, M., Okafuji, N., Fujii, T., & Kawakami, T. (2016). Functional role of HSP47 in the periodontal ligament subjected to occlusal overload in mice. International journal of medical sciences, 13(4), 248-254. https://doi.org/10.7150/ijms.14129