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Bacterial adhesion to poly(HEMA)-based hydrogels

A D Cook1, R D Sagers, W G Pitt

  • 1Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602.

Journal of Biomedical Materials Research
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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Pseudomonas aeruginosa bacteria adhered less to hydrogels with higher water content. TSB and poly(NVP) contamination reduced bacterial adhesion to uniform levels, regardless of hydrogel chemistry.

Area of Science:

  • Biomaterials Science
  • Microbiology
  • Surface Chemistry

Background:

  • Bacterial adhesion to biomaterials is a critical factor in device-associated infections.
  • Poly(hydroxyethyl methacrylate)-based hydrogels are widely used in biomedical applications.
  • Understanding factors influencing bacterial adhesion is crucial for designing improved materials.

Purpose of the Study:

  • To investigate the impact of water content and comonomer chemistry on Pseudomonas aeruginosa adhesion to PHEMA-based hydrogels.
  • To determine how methacrylic acid and N-vinyl pyrrolidone influence bacterial adherence.
  • To assess the effect of growth medium components on adhesion.

Main Methods:

  • Hydrogels with varying water content (33-69 wt%) were synthesized using methacrylic acid and N-vinyl pyrrolidone.

Related Experiment Videos

  • Bacterial adhesion was quantified using laminar flow cells under controlled shear rates.
  • Bacteria were cultured in tryptic soy broth (TSB) and phosphate-buffered saline (PBS).

    • Main Results:

    • A clear inverse correlation was observed between hydrogel water content and P. aeruginosa adhesion.
    • Higher water content hydrogels exhibited significantly reduced bacterial adherence.
    • The presence of TSB and potential poly(NVP) contamination led to low, uniform bacterial adhesion levels, masking hydrogel chemistry effects.

    Conclusions:

    • Hydrogel water content is a primary determinant of P. aeruginosa adhesion.
    • Surface properties can be tuned to minimize bacterial colonization.
    • Further research is needed to elucidate the mechanisms behind TSB and poly(NVP) mediated adhesion reduction.