Abstract
We investigated the bioavailability, efficacy, and toxicity of doxorubicin-loaded solid lipid nanoparticles (DOX-SLNs) prepared by a simple modified double-emulsification method. A 3-factor, 3-level Box–Behnken statistical design was adopted in the optimization of DOX-SLN formulation considering dependent factors particle size and entrapment efficiency. Optimized SLN formulation composed of lipid (2 %) consisting of soya lecithin and Precirol ATO 5 (1:3) with Pluronic F68 (0.3 %) resulted in 217.36 ± 3.31 nm particle size and 59.45 ± 1.75 % entrapment efficiency. DOX-SLN exhibited significant enhancement (p < 0.05) in bioavailability as compared with free DOX in Sprague–Dawley (SD) rats. DOX-SLN exhibited higher peak plasma concentration (6.761 ± 0.08 vs. 2.412 ± 0.04 μg/ml), increased AUC (61.368 ± 3.54 vs. 5.812 ± 0.49 μg/ml h), decreased clearance (36 ± 0.01 vs. 619 ± 0.005 mL/h kg), and volume of distribution (733 ± 0.092 vs. 2,064 ± 0.061 mL/kg) when compared to free DOX. The collective results of cardiac and kidney enzyme assay, antioxidant enzyme levels, hematological parameters, effect on body weight and tumor volume, tumor necrosis factor-α level, histopathological examination, and survival analysis confirmed the improved efficacy and safety profile of DOX-SLN in 7,12-dimethyl benzanthracene-induced breast cancer in SD rats.
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Acknowledgments
Authors would wholeheartedly thank Prof. B.G. Shivananda, Principal, Al-Ameen College of Pharmacy for his kind support and encouragement to carry out this project. Authors are also thankful to University Grant Commission (UGC) for awarding fellowship to Mr. Nagaraju M Patro (10-01/2008 SA-I). The Authors thank Dr. Girish Kunte, Technology Manager, Micro- and Nano-Characterization Facility (MNCF), Centre for Nano-Science and Engineering (CeNSE), Indian Institute of Sciences, Bangalore, for his assistance in XRD and SEM study and Dr. Manjunatha Reddy G.B., Scientist, Project Directorate on Animal Disease Monitoring and Surveillance (PD-ADMAS), Indian Council of Agriculture Research, Bangalore, for his support in histopathological study.
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Patro, N.M., Devi, K., Pai, R.S. et al. Evaluation of bioavailability, efficacy, and safety profile of doxorubicin-loaded solid lipid nanoparticles. J Nanopart Res 15, 2124 (2013). https://doi.org/10.1007/s11051-013-2124-1
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DOI: https://doi.org/10.1007/s11051-013-2124-1