Method for attachment of biomolecules to surfaces through amine-functional groups
First Claim
1. A method of making a medical device having a biomolecule immobilized on a substrate surface, the method comprising:
- providing the substrate, the substrate having a surface comprising an amide-functional polymer;
contacting the amide-functional polymer with a reaction mixture comprising a source of hydroxide ions and a source of hypohalite ions at a temperature of at least about 20°
C. for a period of time effective to convert at least a portion of the amide-functional groups to amine-functional groups to form an amine-functional polymer on the substrate surface, the period of time not exceeding about three hours, wherein the hydroxide ions are present in a molar excess relative to the hypohalite ions, and wherein the hydroxide ions are present at a concentration of no more than about 0.1 M, based on the total volume of the reaction mixture; and
contacting the substrate surface comprising an amine-functional polymer with a biomolecule under conditions effective to immobilize the biomolecule on the substrate surface.
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Abstract
A method of modifying the surface characteristics of a substrate having a surface with an amide-functional polymer thereon. The method involves contacting the amide-functional polymer with a source of hydroxide ions and a source of hypohalite ions at a temperature of at least about 20° C. for a time effective to convert at least a portion of the amide-functional groups to amine-functional groups to form a substrate surface comprising an amine-functional polymer, wherein the hydroxide ions are present in a molar excess relative to the hypohalite ions and at a concentration of no more than about 0.1 M, based on the total volume of the reaction mixture. A biomolecule is attached to the resultant amine-functional polymer.
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Citations
28 Claims
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1. A method of making a medical device having a biomolecule immobilized on a substrate surface, the method comprising:
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providing the substrate, the substrate having a surface comprising an amide-functional polymer;
contacting the amide-functional polymer with a reaction mixture comprising a source of hydroxide ions and a source of hypohalite ions at a temperature of at least about 20°
C. for a period of time effective to convert at least a portion of the amide-functional groups to amine-functional groups to form an amine-functional polymer on the substrate surface, the period of time not exceeding about three hours, wherein the hydroxide ions are present in a molar excess relative to the hypohalite ions, and wherein the hydroxide ions are present at a concentration of no more than about 0.1 M, based on the total volume of the reaction mixture; and
contacting the substrate surface comprising an amine-functional polymer with a biomolecule under conditions effective to immobilize the biomolecule on the substrate surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 28)
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20. A method of modifying the surface characteristics of a solid polymeric material, the method comprising:
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irradiating a surface of the solid polymeric material;
contacting the irradiated surface with an amide-functional ethylenically unsaturated monomer and a source of oxidizing metal ions under conditions effective to graft the monomer to the irradiated surface to form an amide-functional graft polymer thereon;
contacting the amide-functional graft polymer with a reaction mixture comprising a source of hydroxide ions and a source of hypohalite ions at a temperature of at least about 20°
C. for a period of time effective to convert at least a portion of the amide-functional groups to amine-functional groups to form a solid polymeric material having a surface with an amine-functional graft polymer thereon, the period of time not exceeding about three hours, wherein the hydroxide ions are present in a molar excess relative to the hypohalite ions, and wherein the hydroxide ions are present at a concentration of no more than about 0.1 M, based on the total volume of the reaction mixture; and
contacting the solid polymeric material having a surface with an amine-functional graft polymer thereon with a biomolecule under conditions effective to immobilize the biomolecule on the surface. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification