Rapid release encapsulated bioactive agents for inducing or...

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/00 (2006.01) A61K 9/00 (2006.01) A61K 9/16 (2006.01) A61K 47/30 (2006.01) A61P 37/04 (2006.01)

Patent

CA 2301587

A composition for inducing or potentiating an immune response, preferably a CTL, T helper cell, or neutralizing antibody response in a subject, comprising an antigen and/or a non-antigen bioactive agent capable of inducing or potentiating such an immune response encapsulated in a polymeric composition, wherein the polymeric composition comprises a blend of (a) a polymer present in an amount sufficient to provide structural integrity to the polymeric composition, and (b) a rapidly biodegradable component, a rapidly dissolving component, a rapidly swelling component or a component that causes osmotic rupture of the encapsulated polymeric composition is disclosed. Single polymer compositions for achieving such an immune response are also disclosed. Methods for inducing or potentiating a CTL, T helper cell or neutralizing antibody response using the above- identified compositions are disclosed.

L'invention concerne une composition servant à provoquer ou à potentialiser une réponse immunitaire chez un sujet, de préférence une réponse de lymphocytes T cytotoxiques (CTL), de cellules T inductrices, ou d'anticorps neutralisants. La composition comporte un agent bioactif d'antigène ou ne provenant pas d'un antigène, capable de provoquer ou de potentialiser une telle réponse immunitaire, cet agent étant encapsulé dans une composition polymère. La composition polymère comporte un mélange de: (a) un polymère présent en quantité suffisante pour conférer une unité de structure à la composition polymère, et (b) un constituant rapidement biodégradable, un constituant à dissolution rapide, un constituant gonflant rapidement ou un constituant provoquant une rupture osmotique de la composition polymère encapsulée. L'invention concerne également des compositions à base d'un seul polymère permettant de produire une telle réponse immunitaire. L'invention concerne également des procédés servant à provoquer ou à potentialiser une réponse de lymphocytes T cytotoxiques (CTL), de cellules T inductrices, ou d'anticorps neutralisants au moyen des compositions identifiées plus haut.

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