Drug carrier particles composed of poly(ethylene glycol)-co-poly(sebacic acid) (PEG-PSA) have been shown capable of efficient aerosolization into model lungs and the ability to rapidly penetrate human mucus. Here, we develop PEG-PSA particles (Etop/PEG-PSA) that encapsulate up to 40 etoposide by weight in a one step process, release it continuously for 6 days in vitro, and maintain its cytotoxic activity against a human lung tumor cell line in vitro. We further show that Etop/PEG-PSA injected intratumorally effectively suppress human lung tumor growth in a xenograft mouse model, with 100 survival after 31 days. In contrast, 0 survival was observed by day 24 in animals that received free etoposide (either intratumoral or intraperitoneal administration) or placebo particles intratumorally. These findings support PEG-PSA as a drug delivery platform for improved local therapy of cancer.
|Pages (from-to)||339 - 344|
|Number of pages||5|
|Publication status||Published - 2010|