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Response of cementoblast-like cells to mechanical tensile or compressive stress at physiological levels in vitro

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Abstract

To clarify the role of cementoblast in orthodontic-related root resorption, this study was attempted to examine whether murine cementoblast-like cells are responsive to mechanical stress, and how mechanical forces regulate bone sialoprotein (BSP) and osteopontin (OPN) gene expression in these cells in vitro. In this force-loading model, defined and reproducible mechanical loadings of different magnitudes and types were applied up to 24 h. Besides a transitory and reversible change in cell proliferation, remarkable alterations in gene transcription of BSP and OPN were found. BSP mRNA was suppressed by the stresses. Three and six hours-loadings at 2,000 μstrain up-regulated the expression of OPN mRNA, while the other loadings inhibited it. The study also concluded that 4,000 μstrain was likely to exert more influence on cementoblast-like cells than 2,000 μstrain. Furthermore, no obvious evidence indicated the difference between tension and compression. These results suggested that cementoblast-like cells are sensitive to mechanical stress, and may play a role in regulating orthodontic-related root resorption/repair.

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Acknowledgments

National Nature Science Foundation of China funded the study (Grant No. 10572098). Thanks for Prof. Somerman’s generous gift of immortalized murine cementoblast-like cells (OCCM-30). The experiment was performed in State Key Laboratory of Oral Disease (Sichuan University), West China Stomatology Hospital, Sichuan University.

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Correspondence to Ding Bai.

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Huang, L., Meng, Y., Ren, A. et al. Response of cementoblast-like cells to mechanical tensile or compressive stress at physiological levels in vitro. Mol Biol Rep 36, 1741–1748 (2009). https://doi.org/10.1007/s11033-008-9376-3

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  • DOI: https://doi.org/10.1007/s11033-008-9376-3

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