Journal
JOURNAL OF CONTROLLED RELEASE
Volume 91, Issue 1-2, Pages 167-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-3659(03)00241-4
Keywords
SN-38; nanoparticle; formulation; lactone stability; efficacy
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Camptothecin-based drugs, because of their poor solubility and labile lactone ring, pose challenges for drug delivery. The purpose of this research was to develop a nanoparticle delivery system for camptotheca alkaloids. After initial investigations SN-38 was selected as the candidate camptotheca alkaloid for further development. Nanoparticles comprising SN-38, phospholipids and polyethylene glycol were developed and studied in vitro and in vivo. The SN-38 formulations were stable in human serum albumin and high lactone concentrations were observed even after 3 h. In vivo studies in nude mice showed prolonged half-life of the active (lactone form) drug in whole blood and increased efficacy compared to Camptosar(R) in a mouse xenograft tumor model. (C) 2003 Elsevier B.V. All rights reserved.
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