Proteins deposited onto sparingly soluble biocompatible particles for controlled protein release into a biological environment from a polymer matrix
First Claim
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1. A drug delivery system for controlled protein release into a biological environment comprising:
- a) a sparingly soluble biocompatible particle;
b) an effective amount of a protein or peptide deposited onto the particle forming a substantially insoluble protein-particle combination; and
c) a biocompatible polymeric matrix having dispersed therein the protein-particle combination.
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Abstract
The present invention relates to compositions and methods for the modulated release of one or more proteins or peptides. The composition is comprised of a biocompatible polymeric matrix, a protein and/or peptide, and a sparingly water-soluble or essentially insoluble particle. The protein is deposited by adsorption or some other mechanism onto the sparingly water-soluble biocompatible particle wherein the protein-particle combination is dispersed within the polymeric matrix. The deposition of the protein onto the particle acts to modulate the release of the protein or peptide from dosage forms including long-acting dosage systems.
96 Citations
31 Claims
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1. A drug delivery system for controlled protein release into a biological environment comprising:
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a) a sparingly soluble biocompatible particle;
b) an effective amount of a protein or peptide deposited onto the particle forming a substantially insoluble protein-particle combination; and
c) a biocompatible polymeric matrix having dispersed therein the protein-particle combination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of preparing a protein delivery system comprising:
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a) depositing a protein or peptide onto a sparingly soluble biocompatible particle to form a protein-particle combination; and
b) loading the protein-particle combination in a biocompatible polymeric matrix. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A drug delivery system for controlled protein release into a biological environment comprising:
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a) a sparingly soluble biocompatible particle selected from the group consisting of zinc salts, zinc oxides, magnesium salts, magnesium oxides, calcium salts, calcium oxides, and combinations thereof;
b) an effective amount of a protein or peptide deposited onto the particle forming a substantially insoluble protein-particle combination, wherein the protein-particle combination has a biocompatible particle to protein or peptide ratio from about 1;
10 to 100,000;
1 by weight; and
c) a biocompatible polymeric matrix having dispersed therein the protein-particle combination, wherein the protein-particle combination is present in relation to polymeric matrix at from about 0.01 to 30% by weight.
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31. A drug delivery system for controlled protein release into a biological environment comprising:
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a) a sparingly soluble biocompatible particle;
b) an effective amount of a protein or peptide deposited onto the particle forming a substantially insoluble protein-particle combination; and
c) a biocompatible polymeric matrix said comprised of a polymer or gel material selected from the group consisting of nondegradable polymers, biodegradable polymers, absorbable polymers, bioerodible polymers, block copolymers, and combinations thereof, said polymeric matrix in a form selected from the group consisting of polymeric particles, implants, microcapsules, microspheres, nanospheres, polymeric gels, environment responsive polymers or gels, and combinations thereof, said polymeric matrix having dispersed therein the protein-particle combination.
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Specification