Nonvascular drug-eluting stent coated with sodium caprate-incorporated polyurethane for the efficient penetration of paclitaxel into tumor tissue

Dooyong Jeong, Don Haeng Lee, Dong Ki Lee, Kun Na

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


To increase the therapeutic potency of nonvascular drug-eluting stents, sodium caprate was employed as a drug-penetration enhancer. A polytetrafluoroethylene-covered drug-eluting stent was coated with a mixture containing sodium caprate, paclitaxel, and polyurethane via the rolling coating technique. The coated stent has a smooth membrane surface with a 40-μm membrane thickness. Paclitaxel was released from the coated stent for two months. In the multilayered cell sheet model, sodium caprate in the polyurethane membrane (PUSC10) showed the possibility of enhancing the paclitaxel tissue penetration. The amount of penetrated paclitaxel for the sodium caprate-containing polyurethane membrane (PUSC10) was two times higher than that of sodium caprate-free polyurethane membrane. Additionally, the potential of sodium caprate was confirmed by a tumor-bearing small animal model. PUSC10 incorporated with Nile red (as a model fluorescence dye for visualization of drug penetration; PUSC10-Nile red) or PUSC10 incorporated with paclitaxel (PUSC10-paclitaxel) membrane was implanted at tumor sites in Balb/c mice. In the case of PUSC10-Nile red, the tissue penetration depth of Nile red was significantly increased from 30 μm (without sodium caprate) to 1060 μm (with sodium caprate). After seven days, an almost four times higher therapeutic area of PUSC10-paclitaxel was observed compared to that of polyurethane-paclitaxel (without sodium caprate) by a terminal deoxynucleotidyl transferase dUTP nick end labeling assay. The results indicate that sodium caprate improves the penetration and therapeutic efficiencies of drugs in drug-eluting stents, and thus, it has potential for local stent therapy.

Original languageEnglish
Pages (from-to)1133-1144
Number of pages12
JournalJournal of Biomaterials Applications
Issue number8
Publication statusPublished - 2015 Mar 26

Bibliographical note

Funding Information:
This work was supported by the Technology Innovation Program (10044021, Development of nonvascular drug-eluting stent for treatment of gastrointestinal disease) funded by the Ministry of Trade, Industry & Energy (MI, Korea).

Publisher Copyright:
© The Author(s) 2014 Reprints and permissions:

All Science Journal Classification (ASJC) codes

  • Biomaterials
  • Biomedical Engineering


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