University of Massachusetts Medical School Faculty Publications

Title

Surface-grafted zwitterionic polymers improve the efficacy of a single antibiotic injection in suppressing S. aureus periprosthetic infections

UMMS Affiliation

Department of Orthopedics and Physical Rehabilitation

Publication Date

2021-09-02

Document Type

Article

Disciplines

Bacterial Infections and Mycoses | Biomaterials | Biomedical Devices and Instrumentation | Materials Chemistry | Orthopedics

Abstract

Implant-associated bacterial infections are difficult to treat due to the tendency of biofilm formation on implant surfaces, which protects embedded pathogens from host defense and impedes antibiotic penetration, rendering systemic antibiotic injections ineffective. Here, we test the hypothesis that implant coatings that reduce bacterial colonization would make planktonic bacteria within the periprosthetic environment more susceptible to conventional systemic antibiotic treatment. We covalently grafted zwitterionic polymer brushes poly(sulfobetaine methacryate) from Ti6Al4V surface to increase the substrate surface hydrophilicity and reduce staphylococcus aureus (S. aureus) adhesion. Using a mouse femoral intramedullary (IM) canal infection model, we showed that the anti-fouling coating applied to Ti6Al4V IM implants, when combined with a single vancomycin systemic injection, significantly suppressed both bacterial colonization on implant surfaces and the periprosthetic infections, outperforming either treatment alone. This work supports the hypothesis that grafting anti-fouling polymers to implant surfaces improves the efficacy of systemic antibiotic injections to combat periprosthetic infections.

Keywords

Staphylococcus aureus, anti-fouling, bacterial colonization on surfaces, osteomyelitis, periprosthetic infections, planktonic bacteria, zwitterionic polymer brush

DOI of Published Version

10.1021/acsabm.0c00600

Source

Zhang B, Skelly JD, Braun BM, Ayers DC, Song J. Surface-grafted zwitterionic polymers improve the efficacy of a single antibiotic injection in suppressing S. aureus periprosthetic infections. ACS Appl Bio Mater. 2020 Sep 21;3(9):5896-5904. doi: 10.1021/acsabm.0c00600. Epub 2020 Sep 2. PMID: 34368642; PMCID: PMC8340630. Link to article on publisher's site

Related Resources

Link to Article in PubMed

Journal/Book/Conference Title

ACS applied bio materials

PubMed ID

34368642

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