alexa Cytotoxicity of doxorubicin bound to poly(butyl cyanoacrylate) nanoparticles in rat glioma cell lines using different assays.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Bioequivalence & Bioavailability

Author(s): De Juan BS, Von Briesen H, Gelperina SE, Kreuter J

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Abstract The cytotoxicity of doxorubicin bound to poly(butyl cyanoacrylate) nanoparticles (Dox-PBCA-NP) was investigated in the rat glioma cell lines GS-9L, F-98 and RG-2. MTT and LDH assays were used as cytotoxic assays. In general, the cytotoxicity of nanoparticle-bound doxorubicin (Dox) was enhanced compared to the free drug in solution. However, responses of the cell lines towards the drug effects were different. In the case of free Dox in solution, this difference correlated with different intracellular concentrations of Dox, which in turn, depended on the level of P-glycoprotein (P-gp) expression in these cell lines. Accordingly, the 9L gliosarcoma (GS-9L) cells, which appeared to be most resistant towards Dox, were characterized by the highest P-gp expression.Additionally, the influence of surfactants on the cytotoxic effect was investigated at different Dox concentrations. It was shown that the presence of polysorbate 80 (Tween 80) in the nanoparticle formulation significantly enhanced the cytotoxicity, whereas poloxamer 188 (Pluronic F68) and poloxamine 908 (Tetronic 908) had a negligible influence. This article was published in J Drug Target and referenced in Journal of Bioequivalence & Bioavailability

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