Development of biodegradable drug releasing polymeric cardiovascular stents and in vitro evaluation

Sarisozen C., Arica B., Hincal A. A., ÇALIŞ S.

JOURNAL OF MICROENCAPSULATION, vol.26, no.6, pp.501-512, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 6
  • Publication Date: 2009
  • Doi Number: 10.1080/02652040802465792
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.501-512
  • Hacettepe University Affiliated: Yes


Prednisolone acetate (PA) is insoluble in water and was chosen as a model drug for its anti-inflammatory/anti-proliferative functions. PA is incorporated into the film-based polymeric biodegradable stents to provide controlled local release of the drug during the mechanical support phase. Stent formulations were 3mm in diameter with lengths of 150 mm. The polymer wall thickness was 145.0 +/- 4.0 mm for microsphere-containing PLGA 75 : 25 stents. The ATR-FTIR spectra showed biodegradable stent surfaces were free of drug and microspheres. Incorporation of PA into the stents increased the surface area when compared to empty and microsphere-incorporated stents. PA release from the stents containing chitosan microspheres was slower than the PA-only incorporated stents. The drug release from the stents coated with microsphere-containing PLGA 75 : 25 solutions was determined to be the slowest one (19.1% cumulative PA released in 32 days). The stents formulated with PLGA 75 : 25 polymers were considered to be more promising due to their suitable mechanical properties and controlled release of the drug.