Methods for treating bioprosthetic tissue using a nucleophile/electrophile in a catalytic system
First Claim
1. A method for treating a bioprosthetic tissue comprising:
- contacting the bioprosthetic tissue with a nucleophile in the presence of a catalytic system to at least partially cross-link the bioprosthetic tissue;
wherein the nucleophile directly reacts with tissue functional groups associated with the bioprosthetic tissue, and wherein the nucleophile comprises cystamine;
wherein the catalytic system comprises at least one or a combination of a fluoride-based salt, a cesium-based salt, a potassium-based salt, or a rubidium-based salt;
wherein the bioprosthetic tissue is not treated with a glutaraldehyde to at least partially cross-link the bioprosthetic tissue; and
wherein the bioprosthetic tissue has reduced antigenicity and reduced binding sites for calcium after implantation.
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Abstract
Methods for treating a bioprosthetic tissue are described herein. The methods comprise contacting the bioprosthetic tissue with at least one nucleophile and/or at least one electrophile in the presence of a catalytic system comprising at least one or a combination of a fluoride-based salt, a cesium-based salt, a potassium-based salt, a rubidium-based salt, or a carbonate-based salt. The methods may be used to alter functional groups on biological tissue which represent actual and potential calcium binding sites and also processes for cross-linking bioprosthetic tissue. Both processes may be used in conjunction with known fixative techniques, such as glutaraldehyde fixation, or may be used to replace known fixative techniques.
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Citations
17 Claims
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1. A method for treating a bioprosthetic tissue comprising:
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contacting the bioprosthetic tissue with a nucleophile in the presence of a catalytic system to at least partially cross-link the bioprosthetic tissue; wherein the nucleophile directly reacts with tissue functional groups associated with the bioprosthetic tissue, and wherein the nucleophile comprises cystamine; wherein the catalytic system comprises at least one or a combination of a fluoride-based salt, a cesium-based salt, a potassium-based salt, or a rubidium-based salt; wherein the bioprosthetic tissue is not treated with a glutaraldehyde to at least partially cross-link the bioprosthetic tissue; and wherein the bioprosthetic tissue has reduced antigenicity and reduced binding sites for calcium after implantation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification