ABSTRACT
Purpose
The objective of this work was to develop a multifunctional tumor-targeting nanocarrier based on the mechanism of CD44-mediated endocytosis and pH-induced drug release to improve the therapeutic efficacy of docetaxel (DTX).
Methods
Hyaluronic acid-coated docetaxel-loaded cholesteryl hemisuccinate vesicles (HA-CHEMS vesicles) were prepared. The physiochemical properties and pH-dependent drug release of HA-CHEMS vesicles were evaluated. The HA-CHEMS vesicles were investigated for CD44-mediated internalization and in vitro cell viability using MCF-7,A549 and L929 cells.In addition,tissue distribution as well as antitumor efficacy was also evaluated in MCF-7 tumor-bearing mouse model.
Results
The particle size and zeta potential of HA-CHEMS vesicles were 131.4 ± 6.2 nm and −13.3 ± 0.04 mV,respectively. The in vitro drug release results demonstrated a pH-responsive drug release under different pH conditions. In vitro cell viability tests suggested that the encapsulation of DTX in HA-CHEMS vesicles led to more than 51.6-fold and 46.3-fold improved growth inhibition in MCF-7 and A549 cell lines,respectively compared to Taxotere®. From the cell uptake studies,the coumarin 6-loaded HA-CHEMS vesicles enhanced intracellular fluorescent intensity in the CD44-overexpressing cell line (MCF-7). Biodistribution studies revealed selective accumulation of HA-CHEMS vesicles in the MCF-7 bearing BalB/c nude mice as a result of passive accumulation and active targeting (CD44-mediated endocytosis). Compared to Taxotere®,HA-CHEMS vesicles exhibited higher antitumor activity by reducing tumor volume (P < 0.05) and drug toxicity,demonstrating the success of the multifunctional targeting delivery.
Conclusions
This work corresponds to the preparation of a multifunctional tumor-targeted delivery system. Our investigation shows that hyaluronan-bearing docetaxel-loaded cholesteryl hemisuccinate vesicles (HA-CHEMS vesicles) is a highly promising therapeutic system,leading to tumor regression after intravenous administration without visible toxicity.
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Abbreviations
- A549:
-
Non small-cell lung cancer
- C6:
-
coumarin-6
- CHEMS:
-
cholesteryl hemisuccinate
- CLSM:
-
confocal laser scanning microscopy
- DDAB:
-
dimethyl dioctadecyl ammonium bromide
- DL:
-
drug loading
- DLS:
-
dynamic light scattering
- DMEM:
-
dulbecco’s modified Eagle’s medium
- DTX:
-
docetaxel
- EPR:
-
enhanced permeability and retention
- EE:
-
encapsulation efficiency
- HA:
-
hyaluronic acid hyaluronan
- IC50 :
-
the growth inhibitory concentration for 50% of the cell population
- L929:
-
mice fibroblasts
- LYVE-1:
-
the lymphatic vessel endothelial HA receptor-1
- MCF-7:
-
human breast cancer cells
- MTT:
-
3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide
- MW:
-
molecular weight
- PBS:
-
phosphate buffered saline
- PI:
-
propidium iodide
- RHMM:
-
receptor for hyaluronate-mediated motility
- RPMI:
-
roswell park memorial institute
- TEM:
-
transmission electron microscopy
- TIR:
-
tumor inhibition rate
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Acknowledgments and Disclosures
This work was financially supported by the National Natural Science Foundation of China (NSFC,No.81273447), and Heibei Natural Science Foundation of China (HENSF, C2011139007).
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Song, S., Chen, F., Qi, H. et al. Multifunctional Tumor-Targeting Nanocarriers Based on Hyaluronic Acid-Mediated and pH-Sensitive Properties for Efficient Delivery of Docetaxel. Pharm Res 31, 1032–1045 (2014). https://doi.org/10.1007/s11095-013-1225-y
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DOI: https://doi.org/10.1007/s11095-013-1225-y