| 초록 |
Biodegradable polymers were used as a drug carrier for both ALA and ReoPro. Main function of ALA is to increase production of glutathione and ReoPro is a potent inhibitor that blocks the final pathway of platelet aggregation. Since drug-eluting stent (DES) has been used for the patients of coronary artery disease, a novel concept of stent can significantly improve the coronary occlusion and restenosis. In this study a hierarchical structure composed of three layers such as top, barrier, and bottom was formed on the stent surface using electrospraying or ultrasonic nanocoating. The thickness of each layer was about 4~6 μm and the whole thickness was less than 15 μm. The release behaviors of dual drugs are of particular interest. The release behaviors of dual drugs were significantly affected by the presence of a barrier layer within the polymer coating matrix. Current design of polymer coating may be useful in delivering multiple drugs at a time from DES. |
