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Enhanced Hypoglycemic Effect Of Biotin-modified Liposomes Loading Insulin: Effect Of Formulation Variables, Intracellular Trafficking, And Cytotoxicity
X. Zhang, J. Qi, Yi Lu, X. Hu, W. He, W. Wu
Published 2014 · Materials Science, Medicine
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Peroral protein/peptide delivery has been one of the most challenging, but encouraging topics in pharmaceutics. This article was intended to explore the potential of biotin-modified liposomes (BLPs) as oral insulin delivery carriers. By incorporating biotin-DSPE into the lipid bilayer, we prepared BLPs using reverse evaporation/sonication method. We investigated hypoglycemic effects in normal rats after oral administration of BLPs, and the possible absorption mechanism by a series of in vitro tests. The relative pharmacological bioavailability of BLPs was up to 11.04% that was as much as 5.28 folds of conventional liposomes (CLPs). The results showed that the enhanced oral absorption of insulin mainly attributed to biotin ligand-mediated endocytosis. The results provided proof of BLPs as effective carriers for oral insulin delivery.
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