Protein Removal from Hydrogels through Repetitive Surface Degradation

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Chemistry

Background:

• Protein adsorption on biomaterials is a major challenge, often leading to adverse biological responses.
• Developing materials that resist or manage protein adsorption is critical for implantable and medical devices.

Purpose of the Study:

• To synthesize thermoresponsive and degradable hydrogels with suppressed protein adsorption.
• To investigate the mechanism of protein removal via hydrogel surface degradation.

Main Methods:

• Radical polymerization of 2-methylene-1,3-dioxepane, 2-hydroxyethyl acrylate (HEA), and poly(ethylene glycol) monomethacrylate (PEGMA).
• Surface characterization using techniques to confirm chemical composition after hydrolysis.
• Assessment of protein removal through repeated surface degradation cycles.

Main Results:

• Successfully prepared thermoresponsive and degradable hydrogels.
• Demonstrated that surface degradation re-exposes PEG-grafted chains at the interface.
• Confirmed maintenance of hydrogel surface chemical composition after hydrolysis.
• Showcased the ability to remove adsorbed proteins via hydrogel surface degradation for at least three cycles.

Conclusions:

• The developed hydrogels offer a promising strategy for reducing protein fouling in biomedical settings.
• The degradable nature of the hydrogel surface facilitates efficient and repeatable protein removal.
• These findings support the potential of these hydrogels for advanced biomedical applications requiring protein resistance.