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Accelerated osteoblast mineralization on a conductive substrate by multiple electrical stimulation

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Journal of Bone and Mineral Metabolism Aims and scope Submit manuscript

An Erratum to this article was published on 13 May 2011

Abstract

One of the major benefits of a conductive PPy-based substrate is that the mediated electrical stimulation (ES) can be a stimulating factor to promote tissue regeneration. We cultured osteoblast-like Saos-2 cells on a conductive substrate made of biodegradable polylactide (95 wt%) and electrically conducting polypyrrole bioactivated with heparin (PPy/HE) (5 wt%). Using multi-well electrical cell culture plates, the effect of multiple ESs on osteoblast mineralization was investigated at various culture times. As ascertained by ARS, CPC and XPS analyses, the ES was able to promote osteoblast adhesion and growth, resulting in significantly higher calcium and phosphate content in the mineral deposition of the electrically stimulated membranes. Morphology, Ca/P ratio and crystalline structure demonstrated that the minerals on the conductive substrate surface were similar to those found on typical hydroxyapatite. ES also significantly upregulated the expression of the osteoblast-specific markers ALP, BMP2, Runx2 and OC. ES through a synthetic conductive polymer substrate therefore represents a vital option to promote bone regeneration.

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Acknowledgments

This study was supported by the Canadian Institutes of Health Research (CIHR) and the Natural Science and Engineering Research Council of Canada. The authors wish to thank Sèverine Curt for her technical assistance in the biological experiments and Pascal Chevalier for performing the XPS measurements.

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Authors and Affiliations

  1. Département de chirurgie, Faculté de médecine, Université Laval, Centre de recherche de l’Hôpital Saint-François d’Assise, CHUQ, Québec, QC, Canada

    Shiyun Meng & Ze Zhang

  2. Groupe de recherche en écologie buccale, Faculté de médecine dentaire, Pavillon de médecine dentaire, Université Laval, Québec, QC, G1V 0A6, Canada

    Shiyun Meng & Mahmoud Rouabhia

Authors
  1. Shiyun Meng
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  2. Ze Zhang
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  3. Mahmoud Rouabhia
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Correspondence to Mahmoud Rouabhia.

Additional information

An erratum to this article can be found at http://dx.doi.org/10.1007/s00774-011-0277-5

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Meng, S., Zhang, Z. & Rouabhia, M. Accelerated osteoblast mineralization on a conductive substrate by multiple electrical stimulation. J Bone Miner Metab 29, 535–544 (2011). https://doi.org/10.1007/s00774-010-0257-1

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  • DOI: https://doi.org/10.1007/s00774-010-0257-1

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