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- W4290793791 abstract "Cellular delivery of DNA using silica nanoparticles has attracted great attention. Typically, polyethyleneimine (PEI) is used to form a silica/PEI composite vector. Understanding the interactions at the silica and PEI interface is important for successful DNA delivery and transfection, especially for silica with different surface functionality. Herein, we report that a higher content of hydrogen boning formed between PEI molecules and phosphonate modified silica nanoparticles could slow down the PEI dissolution from the freeze-dried solid composites into aqueous solution than the bare silica counterpart. The pronounced PEI retention ability through phosphonation of silica nanoparticles effectively improves the transfection efficiency due to the high DNA binding affinity extracellularly, effective lysosome escape and high nuclear entry of both PEI and DNA intracellularly. Our study provides a fundamental understanding on designing effective silica-PEI-based nano-vectors for DNA delivery applications." @default.
- W4290793791 created "2022-08-09" @default.
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- W4290793791 date "2022-12-01" @default.
- W4290793791 modified "2023-10-18" @default.
- W4290793791 title "Surface chemistry of spiky silica nanoparticles tailors polyethyleneimine binding and intracellular DNA delivery" @default.
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- W4290793791 doi "https://doi.org/10.1016/j.jcis.2022.08.038" @default.
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