Bioorthogonal Mussel-Inspired Elastin-like Nanocoatings for Indwelling Devices

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Tissue Engineering

Background:

• Medical devices like vascular grafts, stents, and catheters often fail due to poor integration with host tissues.
• Commonly used materials (metals, synthetic polymers) can trigger adverse immune responses, leading to device failure.
• Surface modification with designer proteins offers a promising strategy to enhance biointegration.

Purpose of the Study:

• To develop a bioinspired method for coating biomaterial surfaces with protein-engineered polymers.
• To mimic the functions of the native extracellular matrix (ECM) for improved device integration.
• To create a versatile and effective surface functionalization technique for medical implants.

Main Methods:

• Utilized mussel-inspired catechol chemistry and bioorthogonal click chemistry.
• Developed a modular grafting method for surface functionalization of metallic and polymeric implants.
• Employed a bifunctional peptide containing azide and DOPA (3,4-dihydroxyphenylalanine) groups for dip-coating.

Main Results:

• Fabricated bioactive elastin-like coatings with precise peptide presentation via a simple dip-coating process.
• Demonstrated enhanced bioactivity and cytocompatibility on coated surfaces.
• Observed improved endothelial cell adhesion, proliferation, and heparin-binding capacity.

Conclusions:

• The developed bioorthogonal coating method is versatile and effective for implant surface functionalization.
• This approach shows significant potential for tailoring implant surfaces for diverse clinical applications.
• The technique enhances biomaterial integration, potentially reducing device failure and improving patient treatment.