Biodegradable Cable-Tie Rapamycin-eluting Stents

Sci Rep. 2017 Mar 8;7(1):111. doi: 10.1038/s41598-017-00131-w.

Abstract

"Cable-tie" type biodegradable stents with drug-eluting nanofiber were developed to treat rabbit denuded arteries in this study. Biodegradable stents were fabricated using poly-L-lactide film following being cut and rolled into a cable-tie type stent. Additionally, drug-eluting biodegradable nanofiber tubes were electrospun from a solution containing poly (lactic-co-glycolic acid), rapamycin, and hexafluoroisopropanol, and then mounted onto the stents. The fabricated rapamycin-eluting cable-tie stents exhibited excellent mechanical properties on evaluation of compression test and collapse pressure, and less than 8% weight loss following being immersed in phosphate-buffered saline for 16 weeks. Furthermore, the biodegradable stents delivered high rapamycin concentrations for over 4 weeks and achieved substantial reductions in intimal hyperplasia associated with elevated heme oxygenase-1 and calponin level on the denuded rabbit arteries during 6 months of follow-up. The drug-eluting cable-tie type stents developed in this study might have high potential impacts for the local drug delivery to treat various vascular diseases.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorbable Implants
  • Animals
  • Calcium-Binding Proteins / metabolism
  • Calponins
  • Disease Models, Animal
  • Drug-Eluting Stents*
  • Equipment Design
  • Heme Oxygenase-1 / metabolism
  • Male
  • Microfilament Proteins / metabolism
  • Nanofibers / chemistry
  • Polyesters / chemistry*
  • Rabbits
  • Sirolimus / administration & dosage*
  • Sirolimus / chemistry
  • Sirolimus / pharmacology
  • Tunica Intima / drug effects*
  • Tunica Intima / metabolism
  • Up-Regulation

Substances

  • Calcium-Binding Proteins
  • Microfilament Proteins
  • Polyesters
  • poly(lactide)
  • Heme Oxygenase-1
  • Sirolimus