Paclitaxel-eluting silicone airway stent for preventing granulation tissue growth and lung cancer relapse in central airway pathologies

Jesse Xu, Hui Xin Ong, Daniela Traini, Jonathan Williamson, Michael Byrom, Larissa Gomes Dos Reis, Paul M. Young*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Background: Airway stents are used to treat obstructive central airway pathologies including palliation of lung cancer, but face challenges with granulation tissue growth. Paclitaxel is a chemotherapy drug that also suppresses growth of granulation tissue. Yet, side effects arise from administration with toxic solubilizers. By incorporating paclitaxel in silicone stents, delivery of paclitaxel can be localized, and side effects minimized. Methods: Paclitaxel was incorporated into Liquid Silicone Rubber (LSR) containing polydimethylsiloxane, either as a powder or solution, prior to curing. Drug release study was compared in vitro at 37°C over 10 days. Drug release was quantified using HPLC, and bronchial cell lines were grown on LSR to investigate drug cytotoxicity, and expression of inflammatory markers, specifically interleukin-6 and interleukin-8. Results: Release rate of paclitaxel incorporated into silicone rubber was consistent with the Korsmeyer and Weibull models (R2 > 0.96). Paclitaxel exposure reduced IL-8 levels in cancer cell lines, whilst no cytotoxic effect was observed in all cell lines at treatment concentration levels (≤ 0.1% (w/v) paclitaxel in silicone). Conclusions: Incorporating paclitaxel into a silicone matrix for future use in a tracheobronchial stent was investigated. Drug release from silicone was observed and is a promising avenue for future treatments of central airway pathologies.

    Original languageEnglish
    Pages (from-to)1631-1645
    Number of pages15
    JournalExpert Opinion on Drug Delivery
    Issue number11
    Publication statusPublished - 1 Nov 2020


    • Airway stents
    • central airway obstruction
    • drug release
    • granulation tissue
    • lung cancer
    • paclitaxel
    • personalized
    • stenting
    • tracheobronchomalacia


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