Hydrogel microencapsulated vaccines

A - Human Necessities – 61 – K

Patent

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Details

A61K 47/30 (2006.01) A61K 9/14 (2006.01) A61K 9/16 (2006.01) A61K 9/56 (2006.01) A61K 39/00 (2006.01) A61K 39/385 (2006.01) C08G 79/02 (2006.01)

Patent

CA 2167081

Water soluble polymers or polymeric hydrogels are used to encapsulate antigen to form vaccines. The antigen is mixed with a polymer solution, microparticles are formed of the polymer and antigen, and, optionally, the polymer is crosslinked to form a stable microparticle. Preferred polymers are alginate and polyphosphazenes, and mixtures thereof. Microparticles can be administered parenterally or mucosally. For oral delivery, the microparticles are preferably fifteen microns or less in diameter, and adhere to the mucosal lining of the gastrointestinal tract, increasing uptake by the reticuloendothelium.

Polymères ou hydrogels hydrosolubles utilisés pour encapsuler des antigènes afin de produire des vaccins. L'antigène est mélangé à une solution polymère, des microparticules du polymère et de l'antigène se forment et, optionnellement, le polymère est réticulé pour former une microparticule stable. L'alginate et les polyphosphazènes sont des polymères préférés. Lesdites microparticules peuvent être administrées par voie parentérale ou par les muqueuses. Pour l'administration orale, les microparticules ont de préférence un diamètre de quinze microns ou moins, et elles adhèrent à la muqueuse du tube digestif, augmentant ainsi l'absorption par le réticuloendothélium.

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