Title:Doxorubicin Loaded Dextran-coated Superparamagnetic Iron Oxide Na-noparticles with Sustained Release Property: Intracellular Uptake, Phar-macokinetics and Biodistribution Study
Volume: 23
Issue: 7
Author(s): Houli Li, Zhiyi Luo, Mingli Peng*, Lili Guo, Fuqiang Li, Weiyi Feng and Yali Cui*
Affiliation:
- National Engineering Research Center for Miniaturized Detection Systems, Northwest University, Xi'an, China
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of
the Ministry of Education, College of Chemistry and Materials Science, Northwest University. Xi'an, China
- National Engineering Research Center for Miniaturized Detection Systems, Northwest University, Xi'an, China
- College of Life Sciences, Northwest University. Xi'an, China
Keywords:
Doxorubicin, dextran-coated superparamagnetic iron oxide nanoparticles, sustained release, intracellular uptake, pharmacokinetics, biodistribution, HPLC-FLD
Abstract: Background: Due to the short biological half-life and serious side effects (especially for heart and kidney), the application of Doxorubicin (Dox) in clinical therapy is strictly limited. To overcome these shortcomings, a novel sustained release formulation of doxorubicin-loaded dextran-coated superparamagnetic iron oxide nanoparticles (Dox-DSPIONs) was prepared.
Objective: The purpose of this study was to evaluate the intracellular uptake behavior of Dox-DSPIONs and to investigate their pharmacokinetics and biodistribution properties.
Method: Confocal laser scanning microscopy was employed to study the intracellular uptake and release properties of Dox from Dox-DSPIONs in SMMC-7721 cells. Simple high-performance liquid chromatography with fluorescence detection (HPLC-FLD) method was established to study the pharmacokinetics and biodistribution properties of Dox-DSPIONs in vivo after intravenous administration and compared with free Dox.
Results: Intracellular uptake experiment indicated that Dox could be released sustainedly from Dox-DSPIONs over time. The pharmacokinetics parameters displayed that the T1/2and AUC0-24h of Dox-DSPIONs were higher than those of free Dox, while the Cmax of Dox-DSPIONs was significantly lower than that of free drug. The biodistribution behaviors of the drug were altered by Dox-DSPIONs in mice, which showed obvious liver targeting, and significantly reduced the distribution of the drug in the heart and kidney.
Conclusion: Dox-DSPIONs have the sustained-release property in vitro and in vivo, which could significantly prolong blood circulation time, improve bioavailability, and reduce the side effects of Dox. Therefore, the novel formulation of the Dox-DSPIONs has the potential as a promising drug delivery system in cancer therapy.