Abstract
Liposomes possess good biocompatibility and excellent tumor-targeting capacity. However, the rapid premature release of lipophilic drugs from the lipid bilayer of liposomes has negative effect on the tumor-targeted drug delivery of liposomes. In this study, a lipophilic antitumor drug—chlorambucil (CHL)—was encapsulated into the aqueous interior of liposomes with the aid of albumin to obtain the CHL-loaded liposomes/albumin hybrid nanoparticles (CHL-Hybrids). The in vitro accumulative release rate of CHL from CHL-Hybrids was less than 50% within 48 h, while the accumulative CHL release was more than 80% for CHL-loaded liposomes (CHL-Lip). After intravenous injection into rats, the half-life (t 1/2β = 5.68 h) and maximum blood concentration (C max = 4.58 μg/mL) of CHL-Hybrids were respectively 1.1 times and 3.5 times higher than that of CHL-Lip. In addition, CHL-Hybrids had better tumor-targeting capacity for it significantly increased the drug accumulation in B16F10 tumors, which contributed to the significantly control of tumor growth compared with CHL-Lip. Furthermore, CHL-Hybrid-treated B16F10 melanoma-bearing mice displayed the longest median survival time of 30.0 days among all the treated groups. Our results illustrated that the proposed hybrids drug delivery system would be a promising strategy to maintain the controlled release of lipophilic antitumor drugs from liposomes and simultaneously facilitate the tumor-targeted drug delivery.
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We would like to thank for the financial supports of the National Natural Science Foundation of China (No. 81603045) and the Hainan International Cooperation Agreement (No. KJHZ2014-03).
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All animal experiments were performed in compliance with the Guidelines of the Care and Use of Laboratory Animals and approved by the Experiment Animal Administrative Committee of Chengdu Medical College.
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Zhang, Q., Zhang, L., Li, Z. et al. Inducing Controlled Release and Increased Tumor-Targeted Delivery of Chlorambucil via Albumin/Liposome Hybrid Nanoparticles. AAPS PharmSciTech 18, 2977–2986 (2017). https://doi.org/10.1208/s12249-017-0782-5
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DOI: https://doi.org/10.1208/s12249-017-0782-5