Abstract
Staphylococcus aureus and Staphylococcus epidermidis are human pathogens involved in implant-related infections. During those diseases, they are able to form biofilms showing resistance to the effect of many different antibiotics. Drug delivery systems allow a local and effective delivery of antibiotics at high concentrations in the infected tissue without causing the cytotoxic effects commonly linked to systemic administration. We report the use of a porous ceramic biomaterial, such as SBA-15 loaded with antibiotics, to deliver them directly to the infected tissue. SBA-15 discs were loaded with Vancomycin, Rifampin and a combination of both, introduced in a suspension of S. aureus 15981 and S. epidermidis ATCC 35984 and incubated during 6 and 24 h. A statistically significant decrease in the biofilm density and the number of viable bacteria was detected for all antibiotics at 6 h in both bacteria. Rifampin showed an increase in the biofilm density and the number of viable bacteria at 24 h. No differences were detected between Vancomycin and the combination of antibiotics. S. epidermidis was more sensitive to the effect of the antibiotics than S. aureus. Here we have demonstrated that SBA-15 is able to act as an effective drug delivery system not only from a pharmaceutical point of view, but also from a biological one.
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Acknowledgements
This work was funded by the following grant from the Spanish MINECO (MAT2013-48224-C2-2-R).
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AA-C performed the experimental work, the analysis of the data and participates in the manuscript preparation. CP-J participates in the design of the experiment, the analysis of the data and participates in the manuscript preparation. JCD and MM prepared the SBA-15 discs and participates in the manuscript preparation. MV-R and JE designed the experiments; participate in the data analysis and manuscript preparation. All authors approved the final version of the manuscript.
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Aguilar-Colomer, A., Doadrio, J., Pérez-Jorge, C. et al. Antibacterial effect of antibiotic-loaded SBA-15 on biofilm formation by Staphylococcus aureus and Staphylococcus epidermidis. J Antibiot 70, 259–263 (2017). https://doi.org/10.1038/ja.2016.154
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DOI: https://doi.org/10.1038/ja.2016.154
