Biodegradable Polymers Influence the Effect of Atorvastatin on Human Coronary Artery Cells

Area of Science:

• Biomaterials Science
• Cardiovascular Research
• Pharmacology

Background:

• Drug-eluting stents (DES) significantly reduce in-stent restenosis but involve complex biological interactions at the stent surface.
• Statins, like atorvastatin (ATOR), are widely used for coronary artery disease and possess pleiotropic effects on endothelial cells (ECs) and smooth muscle cells (SMCs).
• Maintaining EC function and controlling SMC proliferation are critical challenges for next-generation DES.

Purpose of the Study:

• To investigate the impact of atorvastatin (ATOR) on human coronary artery cells cultured on biodegradable polymers.
• To assess how biodegradable polymers influence the anti-proliferative effects of ATOR on SMCs and its uptake by cells.

Main Methods:

• Cultured human coronary artery endothelial cells (ECs) and smooth muscle cells (SMCs) on biodegradable polymers.
• Assessed the effects of atorvastatin (ATOR) on cell viability and proliferation.
• Measured ATOR uptake and determined IC50 values in the presence of different polymers.

Main Results:

• ATOR exhibited cell type-dependent effects on ECs and SMCs.
• Biodegradable polymers altered ATOR uptake and IC50 values, attenuating its anti-proliferative effects on SMCs.
• The chosen polymers demonstrated a negative influence on the anti-proliferative efficacy of ATOR against SMCs.

Conclusions:

• Biodegradable polymers used in DES can interfere with the therapeutic mechanisms of statins like ATOR.
• Material selection for DES coatings must consider potential drug-polymer interactions that affect drug efficacy.
• Characterizing material-specific drug action mechanisms is essential for developing effective new-generation DES.