Cyclodextrin-Mediated Drug Release from Liposomes Dispersed Within a Bioadhesive Gel

作者: Laïla Boulmedarat , Géraldine Piel , Amélie Bochot , Sylviane Lesieur , Luc Delattre

DOI: 10.1007/S11095-005-4591-2

关键词:

摘要: The aim of the present study was to design a new mucosal drug delivery system composed liposomes dispersed within bioadhesive hydrogel containing methyl-β-cyclodextrin (MeβCD) for controlled release. A hydrophilic model molecule, inulin, encapsulated positively charged and PEG-ylated its release measured in presence MeβCD after vesicle dispersion Carbopol® 974P gel. Freeze-fracture electron microscopy (FFEM) used follow liposome morphological changes when hydrogel. Liposome-MeβCD interactions were investigated by turbidity monitoring during continuous addition FFEM. Inulin diffusion gel influenced concentration since no erosion occurred. When gel, displayed higher stability than vesicles. In MeβCD, amounts free inulin released from liposomes, especially Carbopol®-free system. appeared diffuse towards lipid vesicles permeabilized their bilayer allowing leakage. Indeed, freeze-fracture experiments have shown that behaved as detergent behavior, resulting solubilization. is able mediate, hydrogel, liposome-encapsulated molecule further application this administration.

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