Polyester Mesh Functionalization with Nitric Oxide-Releasing Silica Nanoparticles Reduces Early Methicillin-Resistant Staphylococcus aureus Contamination.

Journal Article (Journal Article)

Background: Infected hernia mesh is a cause of post-operative morbidity. Nitric oxide (NO) plays a key role in the endogenous immune response to infection. We sought to study the efficacy of a NO-releasing mesh against methicillin-resistant Staphylococcus aureus (MRSA). We hypothesized that a NO-releasing polyester mesh would decrease MRSA colonization and proliferation. Materials and Methods: A composite polyester mesh functionalized with N-diazeniumdiolate silica nanoparticles was synthesized and characterized. N-diazeniumdiolate silica parietex composite (NOSi) was inoculated with 104,106, or 108 colony forming units (CFUs) of MRSA and a dose response was quantified in a soy tryptic broth assay. Utilizing a rat model of contaminated hernia repair, implanted mesh was inoculated with MRSA, recovered, and CFUs were quantified. Clinical metrics of erythema, mesh contracture, and adhesion severity were then characterized. Results: Methicillin-resistant Staphylococcus aureus CFUs demonstrated a dose-dependent response to NOSi in vitro. In vivo, quantified CFUs showed a dose-dependent response to NOSi-PCO. Treated rats had fewer severe adhesions, less erythema, and reduced mesh contracture. Conclusions: We demonstrate the efficacy of a NO-releasing mesh to treat MRSA in vitro and in vivo. Creation of a novel class of antimicrobial prosthetics offers new strategies for reconstructing contaminated abdominal wall defects and other procedures that benefit from deploying synthetic prostheses in contaminated environments.

Full Text

Duke Authors

Cited Authors

  • Fernandez-Moure, JS; Van Eps, JL; Scherba, JC; Haddix, S; Livingston, M; Bryan, NS; Cantu, C; Valson, C; Taraballi, F; Kaplan, LJ; Olsen, R; Tasciotti, E

Published Date

  • November 2021

Published In

Volume / Issue

  • 22 / 9

Start / End Page

  • 910 - 922

PubMed ID

  • 33944615

Pubmed Central ID

  • PMC9545808

Electronic International Standard Serial Number (EISSN)

  • 1557-8674

Digital Object Identifier (DOI)

  • 10.1089/sur.2020.288


  • eng

Conference Location

  • United States