Azlactone-functional substrates, corneal prostheses, and manufacture and use thereof
First Claim
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1. A mammalian body implant comprising:
- a hydrogel having azlactone-reactive nucleophilic surfaces, a multi-functional azlactone composition covalently coupled using at least one azlactone moiety to the azlactone-reactive nucleophilic surfaces, and a biologically active material coupled to the multi-functional azlactone composition using at least one azlactone moiety;
wherein the mammalian body implant has the formula;
##STR5## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;
wherein y is at least one and is the number of azlactone moieties less at least one;
wherein R3 is a bridging group capable of covalently connecting a plurality of azlactone moieties; and
wherein B is the hydrogel having azlactone-reactive nucleophilic surfaces and A is a residue of a azlactone-reactive nucleophilic group on the surface on the hydrogel, the azlactone-reactive nucleophilic group comprising O, S, or NR4, and wherein R4 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms.
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Abstract
Azlactone-functional substrates, (especially hydrogels), mammalian body implants, and methods of making and using them are disclosed. The azlactone-functional substrates are the reaction product of substrates having azlactone-reactive nucleophilic surfaces and a multi-functional azlactone composition having at least two azlactone moieties, where at least one moiety covalently couples to the azlactone-reactive nucleophilic surface and at least one moiety remains available for further nucleophilic reaction, such as with a biologically active material. A preferred use of azlactone-functional hydrogel is as the optical element of a corneal prosthesis which enhances epithethial cell growth.
208 Citations
32 Claims
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1. A mammalian body implant comprising:
- a hydrogel having azlactone-reactive nucleophilic surfaces, a multi-functional azlactone composition covalently coupled using at least one azlactone moiety to the azlactone-reactive nucleophilic surfaces, and a biologically active material coupled to the multi-functional azlactone composition using at least one azlactone moiety;
wherein the mammalian body implant has the formula;
##STR5## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;wherein y is at least one and is the number of azlactone moieties less at least one; wherein R3 is a bridging group capable of covalently connecting a plurality of azlactone moieties; and wherein B is the hydrogel having azlactone-reactive nucleophilic surfaces and A is a residue of a azlactone-reactive nucleophilic group on the surface on the hydrogel, the azlactone-reactive nucleophilic group comprising O, S, or NR4, and wherein R4 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 30, 31)
- a hydrogel having azlactone-reactive nucleophilic surfaces, a multi-functional azlactone composition covalently coupled using at least one azlactone moiety to the azlactone-reactive nucleophilic surfaces, and a biologically active material coupled to the multi-functional azlactone composition using at least one azlactone moiety;
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15. An azlactone-functional substrate, comprising a substrate having azlactone-reactive nucleophilic surfaces, said substrate selected from the group consisting of cellulose;
- modified cellulose derivatives;
agarose, dextran;
chitin;
chitosan;
polymers derived from hydroxyethyl methacrylate, hydroxypropyl acrylate, N-methylol acrylamide, allyl alcohol, allyl amine, or N-[3-(N'"'"'-isopropyl) aminopropyl] methacrylamide monomers;
poly(vinyl alcohol) homopolymers; and
poly(vinyl alcohol) copolymers, and a multi-functional azlactone composition covalently coupled thereto using at least one azlactone moiety in a manner such that at least one azlactone moiety remains available for further nucleophilic reaction;wherein the azlactone-functional substrate has the formula;
##STR6## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;wherein y is at least one and is the number of azlactone moieties less at least one; wherein R3 is a bridging group capable of covalently connecting a plurality of azlactone moieties; and wherein B is the substrate having azlactone-reactive nucleophilic surfaces and A is a residue of a azlactone-reactive nucleophilic group on the surface on the substrate, the azlactone-reactive nucleophilic group comprising O, S, or NR4, and wherein R4 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 32)
- modified cellulose derivatives;
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23. An activated substrate having the formula:
- ##STR7## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;
wherein y is at least one and is the number of azlactone moieties less at least one; wherein R3 is a bridging group capable of covalently connecting a plurality of azlactone moieties; and wherein B is a substrate having azlactone-reactive nucleophilic surfaces and A is a residue of a azlactone-reactive nucleophilic group on the surface on the substrate, the azlactone-functional nucleophilic group comprising O, S, or NR4, wherein R4 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms, and wherein the substrate is selected from the group consisting of cellulose;
modified cellulose derivatives;
agarose;
dextran;
chitin;
chitosan;
polymers derived from hydroxyethyl methacrylate, hydroxypropyl acrylate, N-methylol acrylamide, allyl alcohol, allyl amine, or N-[3-(N'"'"'-isopropyl) aminopropyl] methacrylamide monomers;
poly(vinyl alcohol) homopolymers; and
poly(vinyl alcohol) copolymers. - View Dependent Claims (24, 25)
- ##STR7## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;
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26. A method of making an azlactone-functional hydrogel, comprising the steps of:
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(a) forming a hydrogel in a dehydrated state comprising a composition having azlactone-reactive nucleophilic surfaces; (b) reacting a multi-functional azlactone composition with the azlactone-reactive nucleophilic surfaces of the hydrogel in a dehydrated state in a manner that retains at least one azlactone moiety remaining available for further nucleophilic reaction; wherein the azlactone-functional hydrogel has the formula;
##STR8## wherein R1 and R2 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon atoms and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R1 and R2 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, and n is an integer 0 or 1;wherein y is at least one and is the number of azlactone moieties less at least one; wherein R3 is a bridging group capable of covalently connecting a plurality of azlactone moieties; and wherein B is the hydrogel having azlactone-reactive nucleophilic surfaces and A is a residue of a azlactone-reactive nucleophilic group on the surface on the hydrogel, the azlactone-reactive nucleophilic group comprising, O, S, or NR4, and wherein R4 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms. - View Dependent Claims (27, 28, 29)
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Specification