alexa Development of 5-FU and doxorubicin-loaded cationic liposomes against human pancreatic cancer: Implications for tumor vascular targeting.
Cardiology

Cardiology

Journal of Clinical & Experimental Cardiology

Author(s): Kalra AV, Campbell RB

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Abstract PURPOSE: Human pancreatic adenocarcinoma is a major leading cause of cancer mortality in the United States. Given that current strategies are relatively ineffective against this disease, new treatments are being developed. Liposomes possessing relatively high cationic lipid content preferentially accumulate in tumor angiogenic vessels compared to vessels in normal tissues. We therefore seek to develop cationic liposomes for targeting pancreatic tumor vessels. MATERIALS AND METHODS: We report development of 5-fluorouracil (5-FU) and doxorubicin hydrochloride (DOX) loaded in PEGylated cationic liposomes (PCLs). We evaluate cell association, intracellular fate, and cytotoxicity. Human pancreatic cancer cells HPAF-II and Capan-1, and endothelial cells HMEC-1 and HUVEC were used in this study. Intratumoral distribution of PCLs in (HPAF-II) tumors was determined by intravital microscopy. RESULTS: HUVEC and HMEC-1 were most susceptible to 5-FU after 24 and 48 h, compared to HPAF-II and Capan-1. We observed >90\% incorporation of 5-FU and DOX in PCLs for 3-20 mol\% preparations, with reduced incorporation for >20 mol\% formulations. PCLs showed significantly higher association with human endothelial versus pancreatic cancer cells, and improved growth inhibitory properties of DOX. Intravital microscopy revealed distribution of PCLs along HPAF-II vessels. CONCLUSIONS: Targeting human pancreatic cancer with PCLs may represent a rational alternative to conventional strategies. This article was published in Pharm Res and referenced in Journal of Clinical & Experimental Cardiology

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