Controlled release of metal cation-stabilized interferon
First Claim
1. A composition for the controlled release of interferon from a polymeric matrix, comprising:
- a) a biodegradable polymer selected from the group consisting of poly(lactides), poly(glycolides), poly(lactide-co-glycolides), poly(lactic acid)s, poly(glycolic acid)s, poly(lactic acid-co-glycolic acid)s, polycaprolactone, polycarbonates, polyesteramides, polyanhydrides, poly(amino acids), polyorthoesters, polyacetals, polycyanoacrylates, polyetheresters, poly(dioxanone)s, poly(alkylene alkylate)s, copolymers of polyethylene glycol and polyorthoester, biodegradable polyurethanes, blends thereof and copolymers thereof; and
b) particles of metal cation-complexed interferon, wherein said particles are dispersed within the biodegradable polymer and the interferon is present from about 0.1% (w/w) to about 50% (w/w) of the dry weight of the composition.
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Abstract
This invention relates to a composition, and method of forming said composition, for the controlled release of interferon. The controlled release composition of this invention comprises a biocompatible polymer and particles of metal cation-stabilized interferon, wherein the particles are dispersed within the biocompatible polymer. The method of the invention, for producing a composition for the controlled release of interferon, includes dissolving a polymer in a polymer solvent to form a polymer solution, dispersing particles of metal cation stabilized-interferon particles in the polymer solution, and then solidifying the polymer to form a polymeric matrix containing a dispersion of the interferon particles.
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Citations
10 Claims
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1. A composition for the controlled release of interferon from a polymeric matrix, comprising:
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a) a biodegradable polymer selected from the group consisting of poly(lactides), poly(glycolides), poly(lactide-co-glycolides), poly(lactic acid)s, poly(glycolic acid)s, poly(lactic acid-co-glycolic acid)s, polycaprolactone, polycarbonates, polyesteramides, polyanhydrides, poly(amino acids), polyorthoesters, polyacetals, polycyanoacrylates, polyetheresters, poly(dioxanone)s, poly(alkylene alkylate)s, copolymers of polyethylene glycol and polyorthoester, biodegradable polyurethanes, blends thereof and copolymers thereof; and
b) particles of metal cation-complexed interferon, wherein said particles are dispersed within the biodegradable polymer and the interferon is present from about 0.1% (w/w) to about 50% (w/w) of the dry weight of the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification