Bioactive Coatings for Cardiovascular Stents: Modulating Immune Response for Enhanced Performance

Area of Science:

• Cardiovascular medicine and biomaterials science.

Background:

• Cardiovascular disorders are a leading global cause of death.
• Stent implantation involves complex host-immune interactions impacting healing.
• Bioactive coatings offer a strategy to improve stent performance and patient outcomes.

Purpose of the Study:

• To review recent advancements in bioactive coatings for cardiovascular stents.
• To explore how these coatings mitigate immune responses and promote vascular healing.
• To assess the clinical potential of novel stent coating materials.

Main Methods:

• Review of in vitro and in vivo research on bioactive stent coatings.
• Analysis of studies on bioactive peptides, polymers, and composite systems.
• Evaluation of data on inflammatory markers (TNF-α, IL-1β) and macrophage ratios (M2/M1).

Main Results:

• Bioactive coatings significantly reduce inflammatory markers like TNF-α (∼45%) and IL-1β (∼60%) in vitro.
• Coatings promote a favorable M2/M1 macrophage ratio (∼2.5-fold increase) in animal models, indicating reduced inflammation.
• Various coating materials demonstrate potential for mitigating thrombosis and restenosis.

Conclusions:

• Bioactive coatings represent a promising next-generation strategy for cardiovascular stents.
• These coatings enhance host-immune interaction, reduce inflammation, and promote vascular healing.
• Emerging innovations in stent coatings offer significant potential for future cardiovascular treatments.