Treated tissue for implantation and preparation methods

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/077 (2010.01) C12N 5/071 (2010.01) A61K 35/34 (2006.01) A61L 27/36 (2006.01) A61L 27/38 (2006.01) A61F 2/06 (2006.01) A61F 2/24 (2006.01)

Patent

CA 2185447

This disclosure includes a method generating a functional hybrid bioprosthesis. Tissue formed naturally of interstitial collagens is treated to kill native cells and remove potentially immunologically active soluble molecules. Then it may be treated sequentially with extracellular matrix adhesion factor, extracellular matrix glycosaminoglycan, and growth factor appropriate to the cell type required to function within the matrix, and incubating the transplant tissue matrix with cells that are either allogeneic or autologous for the recipient thereby imparting to the matrix the characteristics of the cell type and tissue selected. Tissues with a variety of functional bioactivities can thus be formed in vivo prior to graft transplantation or implantation which will exhibit reduced or no stimulation of an immunological response in the recipient.

Cette invention concerne un procédé de production d'une bioprothèse fonctionnelle hybride. Un tissu constituté naturellement de collagènes interstitiels est traité pour tuer les cellules natives et enlever les molécules solubles potentiellement actives au plan immunologique. Ensuite, on peut le traiter successivement avec un facteur d'adhésion de matrice extracellulaire, un glycosaminoglycane de la matrice extracellulaire et un facteur de croissance adapté au type cellulaire que l'on veut utiliser dans la matrice, puis incuber la matrice de tissu à transplanter avec des cellules qui sont soit allogèniques, soit autologues pour le receveur, ce qui permet de conférer à la matrice les caractéristiques du type cellulaire et du tissu choisi. On peut ainsi former in vitro des tissus présentant une variété de bioactivités fonctionnelles avant la transplantation ou l'implantation du greffon, lesquels provoqueront une réponse immunologique réduite chez le receveur, voire aucune.

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