Noneluting enzymatic antibiofilm coatings

ACS Appl Mater Interfaces. 2012 Sep 26;4(9):4708-16. doi: 10.1021/am3010847. Epub 2012 Sep 4.

Abstract

We developed a highly efficient, biocompatible surface coating that disperses bacterial biofilms through enzymatic cleavage of the extracellular biofilm matrix. The coating was fabricated by binding the naturally existing enzyme dispersin B (DspB) to surface-attached polymer matrices constructed via a layer-by-layer (LbL) deposition technique. LbL matrices were assembled through electrostatic interactions of poly(allylamine hydrochloride) (PAH) and poly(methacrylic acid) (PMAA), followed by chemical cross-linking with glutaraldehyde and pH-triggered removal of PMAA, producing a stable PAH hydrogel matrix used for DspB loading. The amount of DspB loaded increased linearly with the number of PAH layers in surface hydrogels. DspB was retained within these coatings in the pH range from 4 to 7.5. DspB-loaded coatings inhibited biofilm formation by two clinical strains of Staphylococcus epidermidis. Biofilm inhibition was ≥98% compared to mock-loaded coatings as determined by CFU enumeration. In addition, DspB-loaded coatings did not inhibit attachment or growth of cultured human osteoblast cells. We suggest that the use of DspB-loaded multilayer coatings presents a promising method for creating biocompatible surfaces with high antibiofilm efficiency, especially when combined with conventional antimicrobial treatment of dispersed bacteria.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Anti-Bacterial Agents / chemistry
  • Anti-Bacterial Agents / pharmacology*
  • Anti-Bacterial Agents / toxicity
  • Bacterial Proteins / chemistry
  • Bacterial Proteins / metabolism*
  • Biofilms / drug effects*
  • Cell Differentiation / drug effects
  • Cell Line
  • Cell Survival / drug effects
  • Coated Materials, Biocompatible / chemistry
  • Coated Materials, Biocompatible / pharmacology*
  • Coated Materials, Biocompatible / toxicity
  • Glycoside Hydrolases / chemistry
  • Glycoside Hydrolases / metabolism*
  • Humans
  • Hydrogels / chemistry
  • Polymethacrylic Acids / chemistry
  • Staphylococcus epidermidis / physiology
  • Surface Properties

Substances

  • Anti-Bacterial Agents
  • Bacterial Proteins
  • Coated Materials, Biocompatible
  • Hydrogels
  • Polymethacrylic Acids
  • polymethacrylic acid
  • Glycoside Hydrolases