Methods and compositions for repair of cartilage using an in...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/00 (2006.01) C12N 5/071 (2010.01) C12N 5/077 (2010.01) A61K 35/32 (2006.01) A61L 27/38 (2006.01) C12N 11/04 (2006.01)

Patent

CA 2641170

Methods and compositions for the biological repair of cartilage using a hybrid construct combining both an inert structure and living core are described. The inert structure is intended to act not only as a delivery system to feed and grow a living core component, but also as an inducer of cell differentiation. The inert structure comprises concentric internal and external and inflatable/expandable balloon-like bio-polymers. The living core comprises the cell-matrix construct comprised of HDFs, for example, seeded in a scaffold. The method comprises surgically removing a damaged cartilage from a patient and inserting the hybrid construct into the cavity generated after the foregoing surgical intervention. The balloons of the inert structure are successively inflated within the target area, such as a joint, for example. Also disclosed herein are methods for growing and differentiating human fibroblasts into chondrocyte-like cells via mechanical strain.

La présente invention concerne des procédés et des compositions de réparation biologique de cartilage au moyen d'une construction hybride qui combine à la fois une structure inerte et une partie centrale vivante. La structure inerte est conçue pour servir non seulement de système de distribution pour l'alimentation et la croissance d'un composant de partie centrale vivant, mais également d'inducteur de différenciation cellulaire. Cette structure inerte comprend des biopolymères internes et externes concentriques de type ballonnet qui peuvent être gonflés/dilatés. La partie centrale vivante comprend la construction cellule-matrice qui est constituée de fibroblastes dermiques humains (HDF), par exemple, implantés dans un échafaudage. Le procédé consiste à retirer chirurgicalement un cartilage endommagé chez un patient, puis à insérer la construction hybride dans la cavité résultant de ladite intervention chirurgicale. Les ballonnets de la structure inerte sont gonflés successivement à l'intérieur de la zone cible, par exemple une articulation. Cette invention concerne également des procédés pour assurer la croissance et la différenciation de fibroblastes humains en cellules de type chondrocyte par le biais d'une contrainte mécanique.

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