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• W827799676 abstract "Ethanolamine (EA) or ethylenediamine (ED)-functionalized poly(glycidyl methacrylate) (PGMA), namely PGEA or PGED, has recently been used as effective gene carriers because of their low cytotoxicity and high transfection efficiency. In this study, a series of PGMA-based supramolecular polycations (PGED-Gd@PGEAs) with magnetic resonance imaging (MRI) functions were readily constructed by assembling multiple adamantine-headed star PGEA (Ad-PGEA) units with a versatile PGED-CD-Gd backbone, which possessed numerous flanking β-cyclodextrin species and Gd3+ ions. The properties of different PGED-Gd@PGEA vectors were systematically characterized, including the plasmid DNA condensation ability, cytotoxicity, gene transfection efficiency, cellular uptake and MRI function. Such supramolecular gene vectors had lower toxicity than ‘gold standard’ polyethylenimine (PEI, 25 kDa). Furthermore, PGED-Gd@PGEAs exhibited significantly higher transfection efficiencies than PEI or the constituent units (PGED-CD-Gd and Ad-PGEA). The chelation of Gd3+ ions imparted the PGED-Gd@PGEA vectors with a good MRI ability without obvious adverse effects. The present design of PGMA-based supramolecular polycations with Gd3+ chelation would provide useful information for the development of low-toxicity and high-efficiency multifunctional gene delivery systems. An intricate polymer complex can carry genes to their cellular targets with high efficiency and low toxicity. Gene therapy has the potential to revolutionize the treatment of diseases such as cancer, but non-viral gene delivery systems are needed to ensure patient safety. Fu-Jian Xu from the Beijing University of Chemical Technology and co-workers have taken steps to reach this goal by assembling cationic polymers and gadolinium (Gd) ions into spherical, supramolecular host-guest complexes. These compounds, based on biocompatible poly(glycidyl methacrylate) and cyclodextrin molecules, can be size adjusted to ensure the nanoparticles have the correct dimensions for optimal cellular uptake. The addition of Gd ions turns the multifunctional delivery device into a magnetic resonance imaging probe for in vivo monitoring of nucleic acid transfer. A series of new poly(glycidyl methacrylate)-based supramolecular polycations with Gd3+ chelation were designed for low-toxicity and high-efficiency multifunctional gene delivery systems." @default.
• W827799676 created "2016-06-24" @default.
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• W827799676 date "2015-07-01" @default.
• W827799676 modified "2023-10-16" @default.
• W827799676 title "Gd(III) ion-chelated supramolecular assemblies composed of PGMA-based polycations for effective biomedical applications" @default.
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• W827799676 doi "https://doi.org/10.1038/am.2015.67" @default.
• W827799676 hasPublicationYear "2015" @default.
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