title: Layer-by-layer surface modification of lipid nanocapsules.
abstract: Lipid nanocapsules (LNCs) were modified by adsorbing sequentially dextran sulfate (DS) and chitosan (CS) on their surface by the layer-by-layer (LBL) approach. Tangential flow filtration (TFF) was used in intermediate purifications of the LNC dispersion during the LBL process. The surface modification was based on electrostatic interactions between the coating polyelectrolytes (PEs) and the LNCs. Therefore, a cationic surfactant, lipochitosan (LC), was synthesised by coupling stearic anhydride on chitosan, and the surface of LNCs was first modified by this LC by the post-insertion technique. The PEs could be successfully adsorbed on the LNC surface as verified by alternating zeta potential and increase in size. To present a therapeutic application, fondaparinux sodium (FP), a heparin-like synthetic pentasaccharide, was introduced on the LNC surface instead of DS.
authors.affiliation: Inserm U646, University of Angers, Angers, France. samuli.hirsjarvi@univ-angers.fr
authors.forename: Samuli
authors.initials: S
authors.lastname: Hirsjärvi
authors.forename: Yan
authors.initials: Y
authors.lastname: Qiao
authors.forename: Audrey
authors.initials: A
authors.lastname: Royere
authors.forename: Jérôme
authors.initials: J
authors.lastname: Bibette
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Benoit
mesh_terms: D000327:Adsorption; D000925:Anticoagulants / Q000008:administration & dosage; D048271:Chitosan / Q000737:chemistry*; D016264:Dextran Sulfate / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry*; D005374:Filtration; D000077425:Fondaparinux; D053769:Nanocapsules; D011134:Polysaccharides / Q000008:administration & dosage*; D055672:Static Electricity; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D000925:Anticoagulants; D004337:Drug Carriers; D053769:Nanocapsules; D011134:Polysaccharides; D013501:Surface-Active Agents; D048271:Chitosan; D016264:Dextran Sulfate; D000077425:Fondaparinux