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Antibacterial and antibiofilm properties of yttrium fluoride nanoparticles

Authors Lellouche J, Friedman A, Gedanken A, Banin E

Received 16 August 2012

Accepted for publication 12 September 2012

Published 8 November 2012 Volume 2012:7 Pages 5611—5624

DOI https://doi.org/10.2147/IJN.S37075

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Jonathan Lellouche,1,2 Alexandra Friedman,2 Aharon Gedanken,2 Ehud Banin1

1Biofilm Research Laboratory, The Mina and Everard Goodman Faculty of Life Sciences, 2Kanbar Laboratory for Nanomaterials, Department of Chemistry, Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel

Abstract: Antibiotic resistance has prompted the search for new agents that can inhibit bacterial growth. Moreover, colonization of abiotic surfaces by microorganisms and the formation of biofilms is a major cause of infections associated with medical implants, resulting in prolonged hospitalization periods and patient mortality. In this study we describe a water-based synthesis of yttrium fluoride (YF3) nanoparticles (NPs) using sonochemistry. The sonochemical irradiation of an aqueous solution of yttrium (III) acetate tetrahydrate [Y(Ac)3 • (H2O)4], containing acidic HF as the fluorine ion source, yielded nanocrystalline needle-shaped YF3 particles. The obtained NPs were characterized by scanning electron microscopy and X-ray elemental analysis. NP crystallinity was confirmed by electron and powder X-ray diffractions. YF3 NPs showed antibacterial properties against two common bacterial pathogens (Escherichia coli and Staphylococcus aureus) at a µg/mL range. We were also able to demonstrate that antimicrobial activity was dependent on NP size. In addition, catheters were surface modified with YF3 NPs using a one-step synthesis and coating process. The coating procedure yielded a homogeneous YF3 NP layer on the catheter, as analyzed by scanning electron microscopy and energy dispersive spectroscopy. These YF3 NP-modified catheters were investigated for their ability to restrict bacterial biofilm formation. The YF3 NP-coated catheters were able to significantly reduce bacterial colonization compared to the uncoated surface. Taken together, our results highlight the potential to further develop the concept of utilizing these metal fluoride NPs as novel antimicrobial and antibiofilm agents, taking advantage of their low solubility and providing extended protection.

Keywords: yttrium fluoride, nanoparticles, biofilms, antibacterial, catheter, sterile surfaces

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