Compressive force induces osteoblast apoptosis via caspase-8

Y. Goga, M. Chiba, Y. Shimizu, H. Mitani

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


Periodontal remodeling during orthodontic tooth movement is a result of mechanical stresses. The application of excessive orthodontic force induces cell death. However, the nature of compressive force-induced cell death is unclear. We examined whether the in vitro application of continuous compressive force would induce apoptosis in human osteoblast-like cells (MG-63 cells), and investigated the mechanism by which apoptosis was initiated. The cells became aligned irregularly, and cell viability decreased, indicating that the compressive force caused cell death. According to the TUNEL analysis, the number of apoptotic cells increased significantly in a time- and force-dependent manner. Caspase-3 activity increased with the magnitude of the compressive force, and this effect was reduced significantly by a caspase-8 inhibitor, whereas a caspase-9 inhibitor had no such effect. We conclude that the in vitro application of compressive force can induce apoptosis in MG-63 cells through the activation of caspase-3 via the caspase-8 signaling cascade.

Original languageEnglish
Pages (from-to)240-244
Number of pages5
JournalJournal of dental research
Issue number3
Publication statusPublished - 2006 Mar


  • Apoptosis
  • Caspase
  • Mechanical force
  • Osteoblast
  • Tooth movement

ASJC Scopus subject areas

  • Dentistry(all)


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