ABSTRACT
Purpose
In order to improve formulation of targeting chemotherapy, cisplatin-loaded magnetic solid lipid nanoparticles (MSLNs) were prepared. In present study, the deliberate loading of Fe3O4 magnetic nanoparticles (MNs) into cisplatin SLNs was developed.
Methods
SLNs were produced by film scattering ultrasonic technique. The effects of two different loading procedures of MNs on the microstructure and physicochemical properties of MSLNs were investigated by transmission electron microscopy (TEM), zetasizer, infrared spectroscopy (IR), and fluorescence spectroscopy. In vitro drug release and cytotoxicity against human cervical carcinoma SiHa cells, in vivo tumor cell uptake and target tissue distribution of MSLNs under external magnetic field were investigated.
Results
The encapsulation efficiency of cisplatin and the content of MNs in procedure I SLNs were 69.20 ± 4.5% and 2.16 ± 0.53 mg/mL, respectively, which were higher than those of procedure II MSLNs. In procedure I, the MNs, which were combined with lipids during film formation, distributed in the middle of the lipid layer in SLNs. Differently, in procedure II, the MNs and cisplatin were contained in an interior compartment in SLNs, resulting from mixing with drugs during hydration of lipid film. The procedure I MSLNs had higher cytotoxicity than procedure II MSLNs or free cisplatin. With in vivo intratumoral administration, cisplatin concentration in the tumor tissue was maintained at higher level for MSLNs than that for free cisplatin, especially under external magnetic field.
Conclusions
Procedure I, the developed deliberate MNs loading method, was superior over procedure II in cisplatin encapsulation efficiency, MNs content and cell cytotoxicity.
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Abbreviations
- AAS:
-
Graphite furnace atomic absorption spectrometer
- DMSO:
-
Dimethyl sulfoxide
- EE:
-
Encapsulation efficiency
- F-68:
-
Poloxamer 188
- FBS:
-
Fetal bovine serum
- FT-IR:
-
Fourier transform infrared spectroscopy
- GMS:
-
Glycerol monostearate
- HSPC:
-
Hydrogenated soybean lecithin
- MNs:
-
Magnetic nanoparticles
- MSLNs:
-
Magnetic solid lipid nanoparticles
- MTT:
-
3-[4,5-Dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide
- PBS:
-
Phosphate-buffered saline
- PDI:
-
Polydispersity index
- SLNs:
-
Solid lipid nanoparticles
- TEM:
-
Transmission electron microscopy
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ACKNOWLEDGMENTS AND DISCLOSURES
The financial support for this work by the Hebei Provincial Natural Science Fund of China (H2013206040, 2008001072) is greatly acknowledged.
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Zhao, S., Zhang, Y., Han, Y. et al. Preparation and Characterization of Cisplatin Magnetic Solid Lipid Nanoparticles (MSLNs): Effects of Loading Procedures of Fe3O4 Nanoparticles. Pharm Res 32, 482–491 (2015). https://doi.org/10.1007/s11095-014-1476-2
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DOI: https://doi.org/10.1007/s11095-014-1476-2