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Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo

  • Authors:
    • Shaofeng An
    • Yan Gao
    • Yihua Huang
    • Xiaoqiong Jiang
    • Ke Ma
    • Junqi Ling
  • View Affiliations / Copyright

    Affiliations: Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat‑sen University; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong 510055, P.R. China
    Copyright: © An et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 215-221
    |
    Published online on: May 22, 2015
       https://doi.org/10.3892/ijmm.2015.2218
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Abstract

Calcium ions (Ca2+) are a major constituent of most pulp-capping materials and have an important role in the mineralization of human dental pulp cells (hDPCs). A previous study by our group has shown that increased levels of Ca2+ can promote hDPC-mediated mineralization in long-term cultures (21 days). However, the initiation of mineralization occurs in the early stage of osteogenic inductive culture, and the effects of Ca2+ on the mineralization of hDPCs in short-term cultures (five days) have not been studied in detail. Furthermore, the underlying mechanism by which Ca2+ stimulates the mineralization of hDPCs has remained controversial. A strong correlation between mineralization and cell apoptosis and/or death has been identified. Thus, the present study hypothesized that Ca2+ may promote the onset of hDPC-mediated mineralization through inducing their apoptosis and/or death. To verify this hypothesis, Ca2+ was added to the growth culture medium and osteogenic culture medium at various concentrations. Alizarin Red S staining and reverse transcription-polymerase chain reaction analysis were used to evaluate the onset of mineralization. Furthermore, the cell counting kit-8 and fluorescein isothiocyanate-Annexin V/propidium iodide double-staining method were adopted to detect the proliferation and apoptosis of hDPCs in the growth culture medium. An animal experiment and scanning electron microscopic observation of ceramic graft implants were applied to measure the mineralization in vivo. The results showed that 5.4 and 9.0 mM Ca2+ accelerated the onset of mineralized matrix nodule formation, promoted osteopontin mRNA expression and induced marked cell apoptosis and necrosis, but had no obvious effect on cell proliferation. These findings indicated a positive association between cell apoptosis and/or death and the timing of formation as well as the quantity of extracellular mineralization induced by Ca2+ in short-term cultured hDPCs.
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Copy and paste a formatted citation
Spandidos Publications style
An S, Gao Y, Huang Y, Jiang X, Ma K and Ling J: Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo. Int J Mol Med 36: 215-221, 2015.
APA
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., & Ling, J. (2015). Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo. International Journal of Molecular Medicine, 36, 215-221. https://doi.org/10.3892/ijmm.2015.2218
MLA
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., Ling, J."Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo". International Journal of Molecular Medicine 36.1 (2015): 215-221.
Chicago
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., Ling, J."Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo". International Journal of Molecular Medicine 36, no. 1 (2015): 215-221. https://doi.org/10.3892/ijmm.2015.2218
Copy and paste a formatted citation
x
Spandidos Publications style
An S, Gao Y, Huang Y, Jiang X, Ma K and Ling J: Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo. Int J Mol Med 36: 215-221, 2015.
APA
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., & Ling, J. (2015). Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo. International Journal of Molecular Medicine, 36, 215-221. https://doi.org/10.3892/ijmm.2015.2218
MLA
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., Ling, J."Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo". International Journal of Molecular Medicine 36.1 (2015): 215-221.
Chicago
An, S., Gao, Y., Huang, Y., Jiang, X., Ma, K., Ling, J."Short-term effects of calcium ions on the apoptosis and onset of mineralization of human dental pulp cells in vitro and in vivo". International Journal of Molecular Medicine 36, no. 1 (2015): 215-221. https://doi.org/10.3892/ijmm.2015.2218
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