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The effects of fluid composition and shear conditions on bacterial adhesion to an antifouling peptide-coated surface

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Abstract

Biofilms can damage implants and are difficult to treat. Here, we assessed the performance of a tripeptide that self-assembles into an antifouling coating over a broad range of shear conditions that are relevant to biomedical applications. Adhesion assays were performed using a parallel plate flow chamber. The results show that the coating can reduce Escherichia coli adhesion up to 70% when compared with glass. At a shear rate of 15/s, typical for urinary catheters, the coating reduced the adhesion by more than 50%. These findings suggest critical features that should be considered when developing surfaces for biomedical purposes.

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Acknowledgments

This work was supported by project NORTE-01-0145-FEDER-000005–LEPABE-2-ECO-INNOVATION from NORTE 2020, under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF) and by the Rosetrees Trust. Patricia Alves acknowledges the receipt of a Ph.D. grant from the Portuguese Foundation from Science and Technology (FCT) (PD/BD/114317/2016). Sivan Nir acknowledges the support of the Israeli Water Authority. The authors also acknowledge support from the EU COST Action iPROMEDAI TD1305.

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Correspondence to Meital Reches or Filipe Mergulhão.

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Supplementary material

The supplementary material for this article can be found at {rs|https://doi.org/10.1557/mrc.2018.160|url|}.

Authors’ contributions

Reches M and Mergulhao F conceptualized and designed the study. Alves P performed all the adhesion assays and the surface hydrophobicity analysis. Nir S characterized the peptide coating and surface. All authors contributed to the data interpretation. All the authors reviewed the manuscript and approved the final manuscript.

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Alves, P., Nir, S., Reches, M. et al. The effects of fluid composition and shear conditions on bacterial adhesion to an antifouling peptide-coated surface. MRS Communications 8, 938–946 (2018). https://doi.org/10.1557/mrc.2018.160

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  • DOI: https://doi.org/10.1557/mrc.2018.160

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