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- W2890224423 abstract "Chitosan has been widely employed to deliver nucleic acids such as siRNA and plasmids. However, chitosan-mediated delivery of a gene-editing system has not been reported yet. In this study, poly(ethylene glycol) monomethyl ether (mPEG) was conjugated to chitosan with different molecular weights (low molecular weight and medium molecular weight chitosan) achieving a high degree of substitution as identified by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H NMR) spectra. PEGylated chitosan/pSpCas9-2A-GFP nanocomplexes were formed at different N/ P (amine group to phosphate group) ratios and characterized in terms of size and zeta potential. The nanocomplexes developed showed the capability to protect loaded nucleic acids from DNase I digestion and from the stresses of nebulization. In addition, we demonstrated that the PEG conjugation of chitosan improved the mucus-penetration capability of the formed nanocomplexes at N/ P ratios of 5, 10, 20, and 30. Finally, PEGylated low molecular weight chitosan nanocomplexes showed optimal transfection efficiency at an N/ P ratio of 20, while PEGylated medium molecular weight chitosan nanocomplexes showed an optimal transfection efficiency at an N/ P ratio of 5 at pH 6.5 and 6.8. This study established the basis for the delivery of a gene-editing system by PEGylated chitosan nanocomplexes." @default.
- W2890224423 created "2018-09-27" @default.
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- W2890224423 date "2018-09-17" @default.
- W2890224423 modified "2023-10-17" @default.
- W2890224423 title "PEGylated Chitosan for Nonviral Aerosol and Mucosal Delivery of the CRISPR/Cas9 System in Vitro" @default.
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- W2890224423 doi "https://doi.org/10.1021/acs.molpharmaceut.8b00434" @default.
- W2890224423 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6453125" @default.
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