Abstract
Bioactive glasses may function as antimicrobial delivery systems through the incorporation and subsequent release of therapeutic ions. The aim of this study was to evaluate the antimicrobial properties of a series of composite scaffolds composed of poly(octanediol citrate) with increased loads of a bioactive glass that releases zinc (Zn2+) and gallium (Ga3+) ions in a controlled manner. The antibacterial activity of these scaffolds was investigated against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The ability of the scaffolds to release ions and the subsequent ingress of these ions into hard tissue was evaluated using a bovine bone model. Scaffolds containing bioactive glass exhibited antibacterial activity and this increased in vitro with higher bioactive glass loads; viable cells decreased to about 20 % for the composite scaffold containing 30 % bioactive glass. The Ga3+ release rate increased as a function of time and Zn2+ was shown to incorporate into the surrounding bone.
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Acknowledgments
This research is supported by a High Impact Research Grant (UM.C/625/1/HIR/MOHE/ENG/58) from the Ministry of Higher Education Malaysia and University of Malaya Research Grant (UMRG, RG156-12AET).
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Zeimaran, E., Pourshahrestani, S., Djordjevic, I. et al. Antibacterial properties of poly (octanediol citrate)/gallium-containing bioglass composite scaffolds. J Mater Sci: Mater Med 27, 18 (2016). https://doi.org/10.1007/s10856-015-5620-2
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DOI: https://doi.org/10.1007/s10856-015-5620-2