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Calcium ions promote osteogenic differentiation and mineralization of human dental pulp cells : implication for pulp capping materials

An, Shaofeng, Gao , Yan, Ling, Junqi, Wei, Xi, & Xiao, Yin (2012) Calcium ions promote osteogenic differentiation and mineralization of human dental pulp cells : implication for pulp capping materials. Journal of Materials Science : Materials in Medicine, 23(3), pp. 789-795.

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    Abstract

    Calcium (Ca) is the main element of most pulp capping materials and plays an essential role in mineralization. Different pulp capping materials can release various concentrations of Ca ions leading to different clinical outcomes. The purpose of this study was to investigate the effects of various concentrations of Ca ions on the growth and osteogenic differentiation of human dental pulp cells (hDPCs). Different concentrations of Ca ions were added to growth culture medium and osteogenic inductive culture medium. A Cell Counting Kit-8 (CCK-8) was used to determine the proliferation of hDPCs in growth culture medium. Osteogenic differentiation and mineralization were measured by alkaline phosphatase (ALP) assay, Alizarin red S/von kossa staining, calcium content quantitative assay. The selected osteogenic differentiation markers were investigated by quantitative real-time polymerase chain reaction (qRT-PCR). Within the range of 1.8–16.2 mM, increased concentrations of Ca ions had no effect on cell proliferation, but led to changes in osteogenic differentiation. It was noted that enhanced mineralized matrix nodule formation was found in higher Ca ions concentrations; however, ALP activity and gene expression were reduced. qRT-PCR results showed a trend towards down-regulated mRNA expression of type I collagen (COL1A2) and Runx2 at elevated concentrations of Ca ions, whereas osteopontin (OPN) and osteocalcin (OCN) mRNA expression was significantly up-regulated. Ca ions content in the culture media can significantly influence the osteogenic properties of hDPCs, indicating the importance of optimizing Ca ions release from dental pulp capping materials in order to achieve desirable clinical outcomes.

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    10 citations in Scopus
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    9 citations in Web of Science®

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    ID Code: 47720
    Item Type: Journal Article
    Additional URLs:
    Keywords: human dental pulp cells, pulp capping materials, calcium, osteogenic differentiation
    DOI: 10.1007/s10856-011-4531-0
    ISSN: 0957-4530
    Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > BIOCHEMISTRY AND CELL BIOLOGY (060100)
    Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300)
    Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > DENTISTRY (110500)
    Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
    Current > Institutes > Institute of Health and Biomedical Innovation
    Past > Schools > School of Engineering Systems
    Copyright Owner: Copyright 2012 Springer
    Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
    Deposited On: 14 Dec 2011 11:03
    Last Modified: 30 Mar 2012 20:27

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