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- W2023385609 abstract "Liposome-encapsulated polyplex system represents a promising delivery system for oligonucleotide-based therapeutics such as siRNA and asODN. Here, we report a novel method to prepare liposome-encapsulated cationic polymer/oligonucleotide polyplexes based on the reverse-phase evaporation following organic extraction of the polyplexes. The polyplexes of polyethylenimine and oligonucleotide were first formed in aqueous buffer at an N/P ratio of 6. The overall positively charged polyplexes were then mixed with the anionic phospholipids in overall organic media. The overall organic environment and electrostatic interaction between anionic phospholipids and positively charged polyplexes resulted in inverted micelle-like particles with the polyplexes in the core. After phase separation, the hydrophobic particles were recovered in organic phase. Reverse-phase evaporation of the organic solvent in the presence of hydrophilic polymer-grafted lipids resulted in a stable aqueous dispersion of hydrophilic lipid-coated particles with the polyplex in the core. Transmission electron microscopy visualization revealed spherical structures with heavily stained polyplex cores surrounded by lightly stained lipid coats. The lipid-coated polyplex particles showed colloidal stability, complete protection of the loaded oligonucleotide molecules from enzymatic degradation, and high loading efficiency of more than 80%. Thus, this technique represents an alternative method to prepare lipid-coated polyplex particles as a delivery system of oligonucleotide therapeutics." @default.
- W2023385609 created "2016-06-24" @default.
- W2023385609 creator A5068319887 @default.
- W2023385609 creator A5082705765 @default.
- W2023385609 date "2012-02-11" @default.
- W2023385609 modified "2023-10-04" @default.
- W2023385609 title "Liposome-Encapsulated Polyethylenimine/Oligonucleotide Polyplexes Prepared by Reverse-Phase Evaporation Technique" @default.
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- W2023385609 doi "https://doi.org/10.1208/s12249-012-9757-8" @default.
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