Simultaneous release of a hydroxy-methylglutaryl coenzyme A reductase inhibitor and a glycoprotein IIb/IIIa antagonist from a thermoresponsive NiPAAm/NtBAAm copolymer system.
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While deployment of intracoronary stents has been shown to reduce restenosis, stenting can also damage the endothelial was eluted during this period. Xemilofiban release was measured in terms of its ability to inhibit platelet adhesion, using a microfluidic system. To investigate the influence of location and hydrophobicity on elution of bioactivity, three separate systems were employed. While elution of anti-adhesive activity from the system containing xemilofiban-loaded matrices was more dramatic in the short term, a more sustained level of inhibition was achieved when xemilofiban had been incorporated into microgels. All samples investigated for anti-adhesive activity also decreased human coronary artery smooth muscle cell proliferation. Therefore xemilofiban has potential as an agent for preventing in-stent thrombosis. Our study has demonstrated the feasibility of using this novel matrix/microgel system to regulate simultaneous release of both agents in bioactive concentration