The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1998
Filed:
Jul. 20, 1994
CytoTherapeutics, Inc., Lincoln, RI (US);
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.