Bioartificial extracellular matrix containing hydrogel matrix de

Chemistry: molecular biology and microbiology – Animal cell – per se ; composition thereof; process of... – Solid support and method of culturing cells on said solid...

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424 937, 424423, 424488, 435177, 435178, 435325, 435368, 435397, 530326, 530328, 530329, 530402, 530812, 530813, 606152, C12N 500, C12N 1110, A61K 3800, C07K 1702, C07K 1710

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061565725

ABSTRACT:
A bioartificial extracellular matrix for use in tissue regeneration or replacement is provided by derivatizing a three-dimensional hydrogel matrix with a cell adhesive extracellular matrix protein or cell adhesive peptide fragment of the protein. Preferably, derivatizing is by covalent immobilization of a cell adhesive peptide fragment having the amino acid sequence, ArgGlyAsp, TyrIleGlySerArg or IleLysValAlaVal. Cartilage or tendon can be regenerated by implanting a matrix containing an adhesive peptide fragment that favors chondrocyte invasion. The matrix can be pre-seeded with cells, and tissue can be reconstituted in vitro and then implanted. A cell-seeded matrix can be encapsulated in a semi-permeable membrane to form a bioartificial organ. An agarose hydrogel matrix having an agarose concentration of 0.5-1.25% (w/v) and an average pore radius between 120 nm and 290 nm is preferred. A nerve guidance channel for use in regenerating severed nerve is prepared containing a tubular semi-permeable membrane having openings adapted to receive ends of a severed nerve, and an inner lumen containing the hydrogel matrix having a bound cell adhesive peptide fragment through which the nerve can regenerate.

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