An Efficient Surface Modification Strategy Improving Endothelialization with Polydopamine Nanoparticles and REDV...

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Regenerative Medicine

Background:

• Stent-grafts require surface modifications for improved cell interactions and endothelialization.
• Continuous film coatings can impede cell migration and alter physical properties.

Purpose of the Study:

• To develop a novel nanostructure surface modification for stent-grafts.
• To enhance endothelialization and hemocompatibility while preserving physical properties.

Main Methods:

• Braided stent-grafts were coated with polydopamine nanoparticles (PDA-NPs).
• Bioactive REDV peptides were immobilized onto the PDA-NPs.
• Endothelialization and hemocompatibility were evaluated.

Main Results:

• PDA-NPs formed a stable nanostructure on the stent-graft microfilaments.
• The modified stent-grafts showed excellent endothelialization performance.
• Hemocompatibility was significantly improved.
• The physical properties of the stent-grafts remained unchanged.

Conclusions:

• Nanoparticle-based surface modification offers a promising strategy for stent-graft functionalization.
• This method enhances cell integration and biocompatibility.
• It presents a viable surface modification approach for various scaffold applications.