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Thermally switchable polymers achieve controlled Escherichia coli detachment.

Andrew L Hook1, Chien-Yi Chang, David J Scurr

  • 1Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, NG72RD, UK.

Advanced Healthcare Materials
|February 6, 2014
PubMed
Summary

Thermally triggered release of 96% of uropathogenic E. coli was achieved using polymers that change surface wettability with temperature. Bacterial attachment depends on polymer composition, not just water contact angle.

Keywords:
Escherichia coliToF-SIMSswitchable polymersthermal responsiveness

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Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Microbiology

Background:

  • Uropathogenic Escherichia coli (UPEC) cause urinary tract infections.
  • Controlling bacterial adhesion to surfaces is crucial for preventing infections.
  • Polymer surface properties influence bacterial attachment.

Purpose of the Study:

  • To investigate thermally triggered release of UPEC from polymer surfaces.
  • To determine the role of surface wettability and composition in bacterial adhesion.
  • To develop novel strategies for bacterial detachment.

Main Methods:

  • Synthesis of two polymers with opposing wettability changes upon temperature reduction.
  • Assessment of bacterial attachment and release of UPEC.
  • Measurement of water contact angles and surface analysis.

Main Results:

  • Up to 96% release of attached UPEC achieved.
  • Polymers exhibited opposite changes in surface wettability with temperature.
  • Bacterial attachment was found to be dependent on polymer surface composition, not solely on water contact angle.

Conclusions:

  • Thermally responsive polymers can facilitate bacterial release.
  • Surface composition is a critical factor in bacterial adhesion, beyond simple wettability.
  • This work offers insights into designing surfaces for infection control.