Recipe for in-situ gel, and implant, drug delivery system formed thereby
First Claim
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1. A composition, comprisingat least one polymer,at least one gel prevention agent andat least one polar solvent,wherein a ratio of the polymer and the gel prevention agent is 1:
- 5˜
1;
200 by weight,wherein the gel prevention agent diffuses from the polymer when the composition is placed in an aqueous environment or a living tissue and thereby an in-situ gel is formed,wherein the polymer comprises a polymer with an upper critical solution temperature (UCST), biopolymer, synthetic ABA triblock copolymer, zwitterionic homopolymer or a combination thereof, andwherein the synthetic ABA triblock copolymer comprises a copolymer synthesized with N-(3-(methacryoylamino)propyl)-N,N-dimethyl-N-(3-sulfopropyl)ammonium hydroxide as the A block and 2-(2-methoxtethoxy) ethyl methacrylate as the B block, or wherein the zwitterionic homopolymer comprises phosphobetaines, sulfobetaines, carboxybetaines, or a combination thereof.
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Abstract
The disclosure provides a recipe for in-situ gel, formed by dissolving at least one polymer and at least one gel prevention agent in a polar solvent to form a solution and placing the solution in a condition for in-situ forming gels. The disclosure also provides an implant and a drug delivery system formed by the recipe.
51 Citations
20 Claims
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1. A composition, comprising
at least one polymer, at least one gel prevention agent and at least one polar solvent, wherein a ratio of the polymer and the gel prevention agent is 1: - 5˜
1;
200 by weight,wherein the gel prevention agent diffuses from the polymer when the composition is placed in an aqueous environment or a living tissue and thereby an in-situ gel is formed, wherein the polymer comprises a polymer with an upper critical solution temperature (UCST), biopolymer, synthetic ABA triblock copolymer, zwitterionic homopolymer or a combination thereof, and wherein the synthetic ABA triblock copolymer comprises a copolymer synthesized with N-(3-(methacryoylamino)propyl)-N,N-dimethyl-N-(3-sulfopropyl)ammonium hydroxide as the A block and 2-(2-methoxtethoxy) ethyl methacrylate as the B block, or wherein the zwitterionic homopolymer comprises phosphobetaines, sulfobetaines, carboxybetaines, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A composition, comprising at least one polymer, at least one gel prevention agent and at least one polar solvent, wherein a ratio of the polymer and the gel prevention agent is 1:
- 5˜
1;
200 by weight, and wherein the gel prevention agent is diffused from the polymer as placing the composition within the aqueous environment or living tissues and thereby an in-situ gel is formed,wherein the composition further comprising a pharmaceutically active ingredient, and wherein the composition is formulated as eye drops. - View Dependent Claims (19, 20)
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Specification