Modulated release from biocompatible polymers

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/16 (2006.01) A61K 9/70 (2006.01) A61K 38/17 (2006.01) A61K 38/21 (2006.01) A61K 38/27 (2006.01) A61K 38/35 (2006.01) A61K 38/46 (2006.01) A61K 47/34 (2006.01)

Patent

CA 2189254

The present invention relates to a composition for the modulated release of a biologically active agent. The composition comprises a biocompatible polymeric matrix, a biologically active agent which is dispersed within the polymeric matrix, and a metal cation component which is separately dispersed within the polymeric matrix, whereby the metal cation component modulates the release of the biologically active agent from the polymeric matrix. The present invention also relates to a method for modulating the release of a biologically active agent from a biocompatible polymeric matrix, comprising the steps of dissolving a biocompatible polymer in a solvent to form a polymer solution and also separately dispersing a metal cation component and a biologically active agent within the polymer solution. The polymer solution is then solidified to form a polymeric matrix, wherein at least a significant portion of the metal cation component is dispersed in the polymeric matrix separately from the biologically active protein, and whereby the metal cation component modulates the release of the biologically active agent from the polymeric matrix.

L'invention porte sur une composition permettant la libération modulée d'agents boilogiquement actifs et comprenant une matrice de polymères biocompatibles, un agent boilogiquement actif dispersé dans ladite matrice, et un composé cationique métallique dispersé séparément dans cette même matrice et dont la fonction est de moduler la libération de l'agent boilogiquement actif présent dans la matrice. L'invention porte également sur une méthode permettant de moduler la libération d'un agent biologiquement actif et consistant à dissoudre un polymère biocompatible dans un solvant de façon à former une solution dans laquelle on disperse séparément un composé cationique métallique et un agent biologiquement actif. La solution est ensuite solidifiée pour donner une matrice de polymères où une partie importante au moins de du composé cationique métallique se trouve dispersée séparément de la protéine boilogiquement active, ce par quoi le composé métallique module la libération de l'agent boilogiquement actif présent dans la matrice.

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