ABSTRACT
Purpose
The aim of this study was to test the ability of paclitaxel-loaded poly(butylcyanoacrylate) (PBCA) nanoparticles to overcome multidrug resistance (MDR) in human ovarian resistant cells (A2780/T) and investigate its possible mechanism.
Methods
We prepared paclitaxel-loaded PBCA nanoparticles by interfacial polymerization method. The physicochemistry of the nanoparticles was characterized. The cytotoxicity of paclitaxel-loaded PBCA nanoparticles was measured by MTT assay. Calcein-AM assay was used to analyze the P-glycoprotein (P-gp) function, and the expression of MDR-1 mRNA in A2780/T cells treated with drug-loaded nanoparticles was defined by QRT-PCR.
Results
The nanoparticles were approximately spherical in shape with an average diameter of 224.5 ± 5.7 nm. The encapsulation efficiency was 99.23%. The in vitro drug release profile exhibited a biphasic pattern. The drug formulated in PBCA nanoparticles showed a greater cytotoxicity than paclitaxel against A2780/T cells. Paclitaxel-loaded PBCA as well as blank PBCA nanoparticles decreased P-gp function in a dose-dependent manner, suggesting the efficacy of the drug-loaded nanoparticle system on overcoming MDR. There was no significant effect on inhibition to the expression of MDR1 mRNA.
Conclusions
Paclitaxel-loaded PBCA nanoparticles can enhance cytotoxicity and overcome MDR through a mechanism of the inhibition of P-gp function caused by the nanoparticles system.
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ACKNOWLEDGMENTS
This work was supported by a grant from the National Natural Science Foundations of China (No30572361). The authors would like to thank Dr. XM Chen (Department of Occupational Hygiene, Southern Medical University) and Dr. XC Bai (Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University) for technical assistance.
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Ren, F., Chen, R., Wang, Y. et al. Paclitaxel-Loaded Poly(n-butylcyanoacrylate) Nanoparticle Delivery System to Overcome Multidrug Resistance in Ovarian Cancer. Pharm Res 28, 897–906 (2011). https://doi.org/10.1007/s11095-010-0346-9
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DOI: https://doi.org/10.1007/s11095-010-0346-9