Materials and method for the immobilization of bioactive species onto polymeric subtrates
First Claim
1. A vascular graft having bioactive species immobilized thereto, the vascular graft comprising:
- a porous polytetrafluoroethylene material;
a first layer comprised of at least one species of a polymeric surfactant non-covalently attached to the porous polytetrafluoroethylene material and cross-linked to itself in situ;
a second layer comprised of at least one species of a hydrophilic polymer covalently attached to the first layer; and
at least one type of bioactive species attached to the second layer, the second layer and immobilized bioactive species serving as a blood contact surface.
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Abstract
The present invention is directed to support members having surfaces that are rendered hydrophilic for use as a substrate for the immobilization of bioactive species thereon. The hydrophilic surfaces are chemically stable on the support member. The surfaces are also chemically variable to provide a variety of chemically functional groups for immobilization of bioactive species thereto. The surfaces comprise polymeric surfactants attached onto the surfaces of a support member and covalently cross-linked thereon to form a first layer. Hydrophilic polymers are then attached to the first layer on the support member to form a second layer thereon. The second layer is used to enhance the hydrophilicity of a support member, as well as, to provide a substrate for immobilizing bioactive species thereto. Methods for forming the first and second layers are also provided. In addition, methods for attaching bioactive substances to the hydrophilic polymers are provided.
332 Citations
14 Claims
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1. A vascular graft having bioactive species immobilized thereto, the vascular graft comprising:
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a porous polytetrafluoroethylene material; a first layer comprised of at least one species of a polymeric surfactant non-covalently attached to the porous polytetrafluoroethylene material and cross-linked to itself in situ; a second layer comprised of at least one species of a hydrophilic polymer covalently attached to the first layer; and at least one type of bioactive species attached to the second layer, the second layer and immobilized bioactive species serving as a blood contact surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vascular graft having bioactive species immobilized thereto, the vascular graft comprising:
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a porous polytetrafluoroethylene material; a first layer of polyvinyl alcohol non-covalently attached to the porous polytetrafluoroethylene; a second layer of polyvinyl alcohol covalently attached to the first layer; and a bioactive species comprising Gly-Arg-Gly-Asp-Ser attached to the second layer. - View Dependent Claims (13, 14)
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Specification