Christophe Di Giorgio

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Fully homogeneous facial amphiphiles consisting in a cyclodextrin (CD) platform onto which a polycationic cluster and a multi-tail hydrophobic moiety have been installed (polycationic amphiphilic CDs; paCDs) self-organized in the presence of plasmid DNA to form nanometric complexes (CDplexes) which exhibit broad-range transfection capabilities. We(More)
A molecular-diversity-oriented approach for the preparation of well-defined polycationic amphiphilic cyclodextrins (paCDs) as gene-delivery systems is reported. The synthetic strategy takes advantage of the differential reactivity of primary versus secondary hydroxyl groups on the CD torus to regioselectively decorate each rim with cationic elements and(More)
Monodisperse facial amphiphiles consisting of a β-cyclodextrin (βCD) platform exposing a multivalent display of cationic groups at the primary rim and bearing hydrophobic chains at the secondary oxygens have been prepared by implementing two very robust "click" methodologies, namely cuprous cation-catalyzed azide-alkyne cycloaddition (CuAAC) and(More)
We report on the synthesis of various acridine (Acr)-spacer-nuclear localization signal (NLS) peptide conjugates and explore whether their use as NLS-labeling agent of plasmidic DNA could improve gene nuclear import and expression into cells when mediated by synthetic DNA complexes. As the conditions of successful use of the NLS properties to enhance gene(More)
Self-assembled cyclodextrin (CD)-DNA nanoparticles (CDplexes) exhibiting transfection efficiencies significantly higher than PEI-based polyplexes have been prepared from homogeneous seven-fold symmetric polyaminothiourea amphiphiles constructed on a beta-cyclodextrin scaffold.
A di-walled molecular umbrella (1a) has been synthesized by acylation of the terminal amino groups of spermidine with cholic acid, followed by condensation with bis(3-O-[N-1,2,3-benzotriazin-4(3H)-one]yl)-5,5'-dithiobis-2-nitrobenzoate (BDTNB), and displacement with glutathione (gamma-Glu-Cys-Gly, GSH). Replacement of the sterol hydroxyls with sulfate(More)
Monodisperse amphiphilic oligoethyleneimine (OEI)-β-cyclodextrin (βCD) clusters have been prepared, and their potential as gene delivery systems has been evaluated in comparison with a nonamphiphilic congener. The general prototype incorporates tetraethyleneimine segments linked to the primary rim of βCD through either triazolyl or thioureidocysteaminyl(More)
An efficient general strategy for the incorporation of functional elements onto the secondary hydroxyl rim of beta-cyclodextrin has been developed and applied to the synthesis of a novel series of C7-symmetric homogeneous macromolecular polycations with improved DNA complexing and delivery properties.
A collection of homologous monodisperse facial amphiphiles consisting of an α-, β- or γ-cyclodextrin (α, β or γCD) platform exposing a multivalent display of cationic groups at the primary rim and bearing hexanoyl chains at the secondary hydroxyls have been prepared to assess the influence of the cyclooligosaccharide core size in their ability to complex,(More)
We describe the synthesis of a series of AMD3100-lipid and AMD3100-polycationic conjugates which were used as components of targeted lipoplexes (in conjunction with (poly)cationic lipids) and polyplexes, respectively, for mediating specific gene transfer into cells expressing CXCR4 which displays a high affinity for AMD3100. Transfection studies were(More)