New peptidomimetic polymers for antifouling surfaces

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Polymer Science

Background:

• Medical device biofouling by proteins, cells, and microbes compromises performance and patient safety.
• Existing antifouling coatings offer only short-term protection against biofouling.
• Robust, long-term antifouling solutions are critical for medical and industrial applications.

Purpose of the Study:

• To develop a novel biomimetic antifouling polymer for long-term surface protection.
• To create a synthetic peptide-peptoid conjugate mimicking mussel adhesive proteins.
• To evaluate the antifouling efficacy of the developed polymer on medical devices.

Main Methods:

• Synthesized an N-substituted glycine polymer (peptoid) with a C-terminal peptide anchor.
• Designed the peptoid side chain to resemble poly(ethylene glycol) (PEG).
• Incorporated a DOPA- and Lys-rich peptide sequence mimicking mussel adhesive proteins for surface attachment.

Main Results:

• Surfaces modified with the peptide-peptoid conjugate showed significantly reduced serum protein adsorption.
• The modified surfaces demonstrated resistance to mammalian cell attachment for over 5 months in vitro.
• The biomimetic conjugate provided robust and durable antifouling properties.

Conclusions:

• The developed synthetic peptide-based antifouling polymers offer a promising solution for long-term biofouling control.
• This biomimetic approach can be applied to enhance the performance and safety of medical devices.
• The technology has potential applications in physiological, marine, and industrial environments.