Use of growth factors and hormones for expansion of...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/077 (2010.01) A61K 35/32 (2006.01) C12N 5/10 (2006.01)

Patent

CA 2344399

The present invention provides an improved method for expanding cells for use in tissue engineering. In particular the method provides specific biochemical factors to supplement cell culture medium during the expansion process in order to reproduce events occurring during embryonic development with the goal of regenerating tissue equivalents that resemble natural tissues both structurally and functionally. These specific biochemical factors improve proliferation of the cells and are capable of de-differentiation mature cells isolated from tissue so that the differentiation potential of the cells is preserved. The bioactive molecules also maintain the responsiveness of the cells to other bioactive molecules. Specifically, the invention provides methods for expanding chondrocytes in the presence of fibroblast growth factor 2 for use in regeneration of cartilage tissue.

L'invention concerne un procédé amélioré conçu pour développer des cellules utilisées en génie tissulaire. En particulier, le procédé porte sur des facteurs biochimiques spécifiques destinés à compléter le milieu de culture de cellules lors du processus de développement afin de reproduire des événements survenant pendant le développement embryonnaire, le but étant de régénérer des équivalents de tissus qui ressemblent aux tissus naturels aussi bien structurellement que fonctionnellement. Ces facteurs biochimiques spécifiques améliorent la prolifération des cellules et peuvent dédifférencier des cellules matures isolées du tissu de façon que le pouvoir de différentiation des cellules soit préservé. Les molécules bioactives maintiennent également la sensibilité des cellules aux autres molécules bioactives. Spécifiquement, l'invention concerne des procédés permettant de développer des chondrocytes en présence du facteur 2 de croissance de fibroblastes utilisés dans la régénération de tissus cartilagineux.

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