Abstract
A novel brain targeting drug delivery system based on OX26 antibody conjugation on PEGylated cationic solid lipid nanoparticles (OX26-PEG-CSLN) was prepared. The Baicalin-loaded PEGylated cationic solid lipid nanoparticles modified by OX26 antibody (OX26-PEG-CSLN) were prepared by emulsion evaporation-solidification at low temperature method. The immune-gold labeled OX26-PEG-CSLN was visualized by transmission electron microscopy. The mean diameter and zeta potential of OX26-PEG-CSLN, PEG-CSLN and CSLN were determined using a Zetasizer. The entrapment efficiency of OX26-PEG-CSLN, PEG-CSLN and CSLN was determined by ultrafiltration centrifugation method. And the solid-state characterization of OX26-PEG-CSLN and CSLN were analyzed by X-ray. Pharmacokinetics studies were conducted by in vivo microdialysis in rat cerebrospinal fluid. The results showed that the OX26-PEG-CSLN, PEG-CSLN and CSLN had average diameters of 47.68 ± 1.65, 27.20 ± 1.70 and 33.89 ± 5.74 nm, Zeta potentials of -0.533 ± 0.115 mV, 11.200 ± 0.500 mV and 11.080 ± 1.170 mV and entrapment efficiencies of 83.03 ± 0.01%, 92.90 ± 3.50% and 97.83 ± 0.19%, respectively. In the pharmacokinetics studies, the AUC value of OX26-PEG-CSLN was11.08-fold higher than that of th...Continue Reading
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