Abstract
This study was aimed at examination of microparticles formed via the layer-by-layer adsorption of dextran sulfate and chitosan onto the insoluble complexes of various proteins with polyanions. Microparticles with all tested proteins were stable at pH values of 1–5. At pH > 6 the mucoadhesivity of the microparticles changed and the encapsulated proteins were released. Microparticles were able to protect the proteins from proteases. Proteinous protease inhibitors encapsulated as well (2–3%) completely prevented protein proteolysis. The pharmacological effect of microencapsulated insulin was studied in vivo using the model of chronic diabetes in rats, which were treated by oral administration.
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Original Russian Text © N.G. Balabushevich, M.A. Pechenkin, A.V. Lopes de Gerenyu, I.N. Zorov, E.V. Mikhalchik, N.I. Larionova, 2014, published in Vestnik Moskovskogo Universiteta. Khimiya, 2014, No. 3, pp. 158–166.
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Balabushevich, N.G., Pechenkin, M.A., Lopes de Gerenyu, A.V. et al. Layer-by-layer adsorption of biopolyelectrolytes as a universal approach to fabrication of protein-loaded microparticles. Moscow Univ. Chem. Bull. 69, 117–124 (2014). https://doi.org/10.3103/S002713141403002X
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DOI: https://doi.org/10.3103/S002713141403002X