Recombinant Antifreeze Protein Type I as a Potential Peptide-Based Anti-Fouling Material for Biomedical Surfaces

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Biotechnology

Background:

• Material surface biofouling is a critical challenge for biomedical devices.
• Surface modification strategies, including poly(ethylene glycol) (PEG) and peptide-based materials, are employed to enhance anti-fouling properties.
• Peptide-based materials offer biocompatibility, biodegradability, and structural versatility.

Purpose of the Study:

• To investigate the anti-fouling potential of antifreeze protein type I (AFP) from winter flounder as a novel peptide-based biomaterial.
• To evaluate the efficacy of recombinant AFP in preventing protein adsorption and cellular adhesion on modified surfaces.

Main Methods:

• A recombinant antifreeze protein type I (AFP) was constructed and immobilized onto a glass substrate.
• The anti-fouling properties of the AFP-modified substrate were assessed by measuring the adsorption of plasma proteins (albumin, fibrinogen, fibronectin).
• Cell adhesion assays using human ovarian cancer SKOV3 cells and mouse platelets were performed.
• Proteolytic enzyme resistance of tandem-repeat AFP constructs was evaluated using trypsin.

Main Results:

• AFP-modified substrates significantly inhibited the adsorption of key plasma proteins.
• Adhesion of SKOV3 cancer cells and mouse platelets was markedly reduced on AFP-modified surfaces.
• Tandem-repeat AFP constructs demonstrated substantial resistance to proteolytic degradation by trypsin.

Conclusions:

• Recombinant antifreeze protein type I (AFP) exhibits significant anti-fouling capabilities.
• AFP modification represents a promising strategy for developing advanced peptide-based anti-fouling materials for biomedical applications.
• The inherent properties of AFP suggest its potential for use in diverse biomedical environments.