Apparatus and method for control of tissue/implant interactions

A - Human Necessities – 61 – L

Patent

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Details

A61L 31/16 (2006.01) A61B 5/00 (2006.01) A61L 31/10 (2006.01) A61L 31/14 (2006.01) G01N 33/487 (2006.01)

Patent

CA 2354060

A tissue/implant interface, comprising an implant and a bioactive polymer layer adjacent at least a portion of the outer surface of the implant, wherein the polymer layer contains at least one tissue response modifier covalently attached to the polymer layer or entrapped within the polymer layer in a quantity effective to control the tissue response at the site of implantation. Preferably, the at least one tissue response modifier controls inflammation, fibrosis, and/or neovascularization. Exemplary tissue response modifiers include, but are not limited to, steroidal and non-steroidal anti-inflammatory agents, anti-fibrotic agents, anti-proliferative agents, cytokines, cytokine inhibitors, neutralizing antibodies, adhesive ligands, and combinations thereof. Use of the various combinations of tissue response modifiers with bioactive polymers provides a simple, flexible and effective means to control the implant/tissue interphase, improving implant lifetime and function.

L'invention concerne une interface tissu/implant comprenant un implant et une couche polymère bioactive adjacente au moins à une partie de la surface externe de l'implant, ladite couche renfermant au moins un modificateur de réponse de tissu lié covalent à la couche ou incorporé à cette couche, selon une quantité efficace pour contrôler la réponse du tissu sur le site d'implantation. De préférence, au moins un modificateur de réponse de tissu contrôle l'inflammation, la fibrose, et/ou la néovascularisation. A titre d'exemple de modificateur, on peut citer, de manière non exhaustive, les anti-inflammatoires stéroïdes et non stéroïdes, les agents anti-fibrose, les agents antiprolifératifs, les cytokines, les inhibiteurs de cytokine, les anticorps de neutralisation, les ligands adhésifs, et les combinaisons de ces produits. L'utilisation de diverses combinaisons de modificateurs de réponse de tissu et de polymères bioactifs offre un moyen simple, souple et efficace de contrôler l'interface implant/tissu, et d'améliorer à la fois la durée de vie et la fonction des implants.

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