Composition for sustained release of non-aggregated...

A - Human Necessities – 61 – K

Patent

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Details

A61K 38/18 (2006.01) A61K 9/16 (2006.01) A61K 47/02 (2006.01) A61K 47/30 (2006.01) A61K 47/26 (2006.01)

Patent

CA 2223834

A composition, and methods of forming and using said composition, for the sustained release of non-aggregated, biologically active, erythropoietin (EPO). The sustained release composition of this invention comprises a polymeric matrix of a biocompatible polymer and particles of biologically active, aggregation-stabilized EPO, wherein said particles are dispersed within the biocompatible polymer. The method of the invention for producing a composition for the sustained release of biologically active EPO, includes dissolving a biocompatible polymer in a polymer solvent to form a polymer solution, dispersing particles of biologically active, aggregation-stabilized EPO in the polymer solution, and then solidifying the polymer to form a polymeric matrix containing a dispersion of said EPO particles. The method for using a composition of the invention is a method for providing a therapeutically effective blood level of biologically active, non-aggregated erythropoietin in a subject for a sustained period. In this method, a subject is administered an effective dose of the sustained release composition of the present invention.

L'invention se rapporte à une composition permettant la libération prolongée d'érythropoïétine sans agrégation, biologiquement active, ainsi que les procédés de fabrication et d'utilisation de ladite composition. Cette composition comprend une matrice polymère en polymère biocompatible et des particules d'érythropoïétine à agrégation stabilisée et biologiquement active, les particules en question étant dispersées dans le polymère biocompatible. Le procédé décrit dans l'invention pour la fabrication d'une composition permettant la libération prolongée d'érythropoïétine biologiquement active consiste à dissoudre un polymère biocompatible dans un solvant de polymères en vue de former une solution polymérique, à disperser les particules d'érythropoïétine à agrégation stabilisée et biologiquement active dans ladite solution, puis à solidifier le polymère afin de constituer une matrice polymère renfermant la dispersion des particules d'érythropoïétine considérées. Le procédé décrit dans l'invention pour l'utilisation d'une telle composition permet d'obtenir un taux sanguin d'érythropoïétine sans agrégation et biologiquement active efficace du point de vue thérapeutique chez un patient, pendant une période prolongée. Ainsi, on parvient à administrer au patient une dose efficace de la composition à libération prolongée.

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