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Updated: Aug 10, 2026
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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications
Published on: September 15, 2017
Interactions between hen egg-white lysozyme, PEG2,000, and PLA50 at the air-water interface
A Malzert-Fréon1, O Abillon, J E Proust
1Laboratoire de Pharmacie Galénique, UFR de Sciences Pharmaceutiques, bd Becquerel, 14032 Caen, France.
Colloids and Surfaces. B, Biointerfaces
|April 19, 2005
Summary
Polymer films made of poly(ethylene glycol) (PEG) and poly(d,l-lactide) (PLA) mixtures or copolymers effectively reduce protein adsorption at the air-water interface. The copolymer film offers superior protection against hen egg-white lysozyme adsorption.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Polymer Science
Background:
- Protein adsorption at interfaces is a critical issue in biomedical applications.
- Poly(ethylene glycol) (PEG) and poly(d,l-lactide) (PLA) are widely used biocompatible polymers.
- Understanding polymer film behavior at the air-water interface is essential for developing anti-fouling surfaces.
Purpose of the Study:
- To compare the protein adsorption prevention efficiency of PEG/PLA mixture films versus PEG-PLA copolymer films.
- To investigate the influence of polymer surface coverage density on protein adsorption.
- To analyze the structural configuration of polymer films at the air-water interface.
Main Methods:
- Preparation and characterization of polymer films using poly(ethylene glycol) (PEG2,000)/poly(d,l-lactide) (PLA50) mixture and PEG2,000-PLA50 copolymer.
- Surface pressure/surface area curve analysis using a Langmuir trough.
- X-ray reflectivity measurements to determine film structure and protein adsorption.
- Adsorption studies using hen egg-white lysozyme (HEWL) as a model protein.
Main Results:
- Both PEG/PLA mixture and copolymer films reduced hen egg-white lysozyme (HEWL) adsorption at the air-water interface.
- Increased polymer surface coverage density led to decreased protein adsorption for both film types.
- The PEG/PLA mixture film, even in a condensed state, allowed some HEWL adsorption and penetration.
- The PEG-PLA copolymer film, due to its configuration and PEG segments, significantly inhibited HEWL adsorption for extended periods.
Conclusions:
- PEG-PLA copolymer films demonstrate superior performance in preventing protein adsorption compared to PEG/PLA mixture films.
- The interfacial configuration and composition of polymer films play a crucial role in controlling protein adsorption.
- These findings have implications for designing advanced biomaterials with enhanced anti-fouling properties.
