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• W2023543867 abstract "We have evaluated the key properties of the polyethylenimine (PEI)-polyethylene glycol (PEG)-TAT peptide polyplex nanoparticles including their behavior in cells and compared them with the transfection efficacy (TE) using 11 different cell lines. We found statistically significant positive correlation between TE and the share of 50–75 nm fraction in the whole mixture of nanoparticles estimated with atomic force microscopy. Variations in PEG/PEI and N/P ratios (PEI nitrogen to DNA phosphate ratio) enabled us to find their optimal combinations, which resulted in up to 100% TE for several cell lines. Surfaces of the TE dependence of both PEG/PEI and N/P turned out to be similar in appearance for all investigated cell lines, while maximum TEs were different. We investigated subcellular transport kinetics and unpacking of the polyplex nanoparticles labeled with quantum dots (plasmid DNA) and AlexaFluor647 (block-copolymer part) using Förster Resonance Energy Transfer approach. The results demonstrated clear and statistically significant positive correlation of TE with the cellular uptake rate of the nanoparticles and negative correlation with the rate constant of their unpacking within endo/lysosomal compartments in the living cells. We have evaluated the key properties of the polyethylenimine (PEI)-polyethylene glycol (PEG)-TAT peptide polyplex nanoparticles including their behavior in cells and compared them with the transfection efficacy (TE) using 11 different cell lines. We found statistically significant positive correlation between TE and the share of 50–75 nm fraction in the whole mixture of nanoparticles estimated with atomic force microscopy. Variations in PEG/PEI and N/P ratios (PEI nitrogen to DNA phosphate ratio) enabled us to find their optimal combinations, which resulted in up to 100% TE for several cell lines. Surfaces of the TE dependence of both PEG/PEI and N/P turned out to be similar in appearance for all investigated cell lines, while maximum TEs were different. We investigated subcellular transport kinetics and unpacking of the polyplex nanoparticles labeled with quantum dots (plasmid DNA) and AlexaFluor647 (block-copolymer part) using Förster Resonance Energy Transfer approach. The results demonstrated clear and statistically significant positive correlation of TE with the cellular uptake rate of the nanoparticles and negative correlation with the rate constant of their unpacking within endo/lysosomal compartments in the living cells." @default.
• W2023543867 created "2016-06-24" @default.
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• W2023543867 date "2011-01-01" @default.
• W2023543867 modified "2023-09-28" @default.
• W2023543867 title "Properties of PEI-based Polyplex Nanoparticles That Correlate With Their Transfection Efficacy" @default.
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• W2023543867 doi "https://doi.org/10.1038/mt.2010.233" @default.
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