Nerve guidance channel containing bioartificial three-dimensiona

Drug – bio-affecting and body treating compositions – Extract – body fluid – or cellular material of undetermined... – Nervous system

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424 937, 435177, 435178, 435368, 435395, 435397, 435402, 530326, 530328, 530329, 530402, 606152, A61K 3530, C12N 1110, C12N 500, A61B 1708

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active

058340297

ABSTRACT:
A bioartificial three-dimensional hydrogel extracellular matrix derivatized with a cell adhesive peptide fragment is provided for use in tissue regeneration or replacement. The choice of adhesive peptide fragment depends on the desired target cell type. Cartilage or tendon can be regenerated by implanting a matrix containing adhesive peptide fragments that favor 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 gel pore radius between 120 nm and 290 nm is preferred. The peptide fragment preferably contains the sequence, ArgGlyAsp or TyrIleGlySerArg or IleLysValAlaVal, and is covalently immobilized to the matrix. A nerve guidance channel for use in regenerating severed nerve is prepared containing a tubular semi-permeable membrane having openings adapted to receive the ends of a severed nerve, and an inner lumen containing the matrix having an adhesive peptide fragment through which the nerve can regenerate.

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