Versatile Coating via Programmed Assembly of miR-155 Inhibitor and Endothelial Affinity Peptide.

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Nanotechnology

Background:

• Cardiovascular implants face challenges like inflammation and cell overgrowth.
• Endothelialization is crucial for long-term implant success.
• Current implants have limited in vivo performance.

Purpose of the Study:

• To create a versatile implant coating to improve cardiovascular implant performance.
• To enhance endothelialization and reduce adverse cellular responses.
• To investigate the coating's anti-inflammatory and anticoagulant properties.

Main Methods:

• Constructed a coating using dopamine adhesion and click chemistry.
• Programmed assembly of heparin, miR-155 inhibitor, and endothelial cell affinity peptide.
• Evaluated coating performance through in vitro cellular experiments and in vivo animal studies.

Main Results:

• Coating modulated macrophage phenotype via miR-155 inhibition, reducing inflammatory factors.
• Promoted endothelial cell adhesion and proliferation while inhibiting smooth muscle cell growth.
• Demonstrated excellent anticoagulant properties and reduced thrombus formation in animal models.

Conclusions:

• The developed coating effectively promotes early endothelialization of cardiovascular implants.
• The coating improves the inflammatory environment and inhibits adverse cell proliferation.
• This versatile coating shows significant promise for enhancing cardiovascular implant performance.