Drug delivery compositions and medical devices containing block copolymer
First Claim
1. A medical device comprising:
- a block copolymer comprising one or more polyolefin elastomeric blocks and one or more thermoplastic blocks selected from vinyl aromatic blocks and methacrylate blocks; and
a therapeutic agent, said block copalymer being loaded with said therapeutic agent, wherein said medical device is adapted for implantation or insertion in the coronary vasculature, peripheral vasculature, esophagus, colon, biliary tract or brain of a patient.
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Abstract
A composition for delivery of a therapeutic agent is provided. The composition comprises: (a) a biocompatible block copolymer comprising one or more elastomeric blocks and one or more thermoplastic blocks and (b) a therapeutic agent, wherein the block copolymer is loaded with the therapeutic agent. The block copolymer is preferably of the formula X—(AB)n, where A is an elastomeric block, B is a thermoplastic block, n is a positive whole number and X is a seed molecule. The elastomeric blocks are preferably polyolefin blocks, and the thermoplastic blocks are preferably selected from vinyl aromatic blocks and methacrylate blocks. According to another aspect of the invention, a medical device is provided, at least a portion of which is insertable or implantable into the body of a patient. The medical device comprises (a) the above biocompatible block copolymer and (b) a therapeutic agent, wherein the block copolymer is loaded with the therapeutic agent. According to another aspect of the present invention, a method of treatment is provided in which the above device is implanted or inserted into a patient, resulting in the release of therapeutic agent in the patient over an extended period. According to yet another aspect of the invention, a coated medical device is provided which comprises: (a) an intravascular or intervascular medical device and (b) a coating over at least a portion of the intravascular or intervascular a medical device, wherein the coating comprises the above biocompatible block copolymer.
144 Citations
48 Claims
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1. A medical device comprising:
- a block copolymer comprising one or more polyolefin elastomeric blocks and one or more thermoplastic blocks selected from vinyl aromatic blocks and methacrylate blocks; and
a therapeutic agent, said block copalymer being loaded with said therapeutic agent, wherein said medical device is adapted for implantation or insertion in the coronary vasculature, peripheral vasculature, esophagus, colon, biliary tract or brain of a patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
- a block copolymer comprising one or more polyolefin elastomeric blocks and one or more thermoplastic blocks selected from vinyl aromatic blocks and methacrylate blocks; and
Specification