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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Poly(ethylene glycol)-Based Coatings Combining Low-Biofouling and Quorum-Sensing Inhibiting Properties to Reduce

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Summary

This study introduces a novel poly(ethylene glycol) coating that covalently incorporates a synthetic quorum sensing (QS) inhibitor. This multifunctional surface reduces bacterial adhesion and biofilm formation on medical devices.

Keywords:
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Area of Science:

  • Biomaterials Science
  • Microbiology
  • Surface Chemistry

Background:

  • Biofilm formation on medical devices causes persistent infections.
  • Multifunctional coatings are needed to combat biofilm-related infections.
  • Quorum sensing (QS) is a bacterial communication system that can be targeted to prevent biofilm formation.

Purpose of the Study:

  • To develop and characterize a poly(ethylene glycol) (PEG) based multifunctional coating.
  • To incorporate a synthetic QS inhibitor, 5-methylene-1-(prop-2-enoyl)-4-(2-fluorophenyl)-dihydropyrrol-2-one (DHP), into the coating.
  • To evaluate the coating's ability to reduce bacterial adhesion and biofilm formation.

Main Methods:

  • Covalent incorporation of DHP into a PEG-based coating.
  • X-ray photoelectron spectroscopy (XPS) for coating characterization and DHP incorporation confirmation.
  • Cell attachment and cytotoxicity studies using L929 mouse fibroblasts.
  • Bacterial colonization assays with *Staphylococcus aureus* and *Pseudomonas aeruginosa*.

Main Results:

  • The coating was successfully synthesized and DHP was confirmed to be covalently incorporated.
  • The coatings exhibited low biofouling and biocompatible properties.
  • Significant reduction in biofilm formation by *S. aureus* and *P. aeruginosa* was observed.
  • The incorporated DHP retained its antimicrobial activity.

Conclusions:

  • A novel multifunctional coating combining low biofouling with QS inhibition was developed.
  • This coating effectively reduces bacterial colonization and biofilm formation on surfaces.
  • The DHP-functionalized PEG coating represents a promising strategy for preventing medical device-associated infections.