Preparation and in vitro release profiles of drug-eluting controlled biodegradable polymer coating stents.
In the present study, the different drug-eluting controlled biodegradable polymer coatings were fabricated on stainless steel stents. The coatings were not only uniform and smooth but also had excellent mechanical property. The drug release profiles of drug-eluting stents were studied in detail in this study. Depending on the drug type, different drug-eluting stents exhibited different drug release profile. There were two basic release profiles for different drug-eluting stents, i.e., two-phase release profile with burst release or linear release profile without burst release. Incorporating heparin in the rapamycin or curcumin eluting stents can improve the average drug release rate of both and the burst release of rapamycin. The average drug release rate increased with the increase of drug loading but was not proportional to increase of the ratio of drug/polymer. Fabricating the control release layer on rapamycin-eluting stent surface can prevent the burst release of rapamycin and prolong the release period of rapamycin. All results showed that the drug release profile of drug-eluting stents depends on many parameters including drug type, ratio of drug/polymer, and drug carrier properties.
Pan
Chang-Jiang
CJ
Key Laboratory of Biorheological Science and Technology Chongqing University, Ministry of Education, Chongqing 400044, China.
Tang
Jia-Ju
JJ
Weng
Ya-Jun
YJ
Wang
Jin
J
Huang
Nan
N
D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis* / Q000737:chemistry*; D003474:Curcumin / Q000737:chemistry; D004337:Drug Carriers / Q000737:chemistry; D016503:Drug Delivery Systems; D054855:Drug-Eluting Stents; D006493:Heparin / Q000737:chemistry; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D020123:Sirolimus / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D004337:Drug Carriers; D006493:Heparin; D003474:Curcumin; D020123:Sirolimus