Claims for Patent: 8,323,642

Summary for Patent: 8,323,642

Title:	Tissue fusion method using collagenase for repair of soft tissue
Abstract:	The present invention provides a method of using locally administered collagenase as a non-invasive means of enhancing cell release from the cartilage or fibrocartilage tissues adjacent to a disease or injury site. The subsequent migration of cells from these tissues into the lesion or wound, followed by deposition of the appropriate extracellular matrix, results in closure of the lesion or fusion of a tissue gap.
Inventor(s):	Story; Brooks J. (Franklin, MA), Lu; Ed Yiling (Chestnut Hill, MA), Torres; Donna (Atileboro, MA)
Assignee:	DePuy Mitek, Inc. (Raynham, MA)
Application Number:	11/637,983
Patent Claims:	1. A method of healing a defect or injury in meniscal tissue comprising a first surface of the tissue and an opposing second surface of the tissue, the method comprising the steps of: Applying a collagenase composition to at least one of the first surface or second surface of the defect or injury, and applying a collagenase scavenger solution to a region surrounding the at least one of the first surface or second surface of the defect or injury, thereby promoting fusion of the first surface to the second surface and healing of the defect or injury. 2. The method of claim 1 wherein the collagenase composition is applied in vivo. 3. The method of claim 1, wherein the collagenase composition is selected from the group consisting of matrix metalloproteinase (MMP)-1, MMP-8 and MMP-13. 4. The method of claim 1, wherein the collagenase comprises at least one collagenase produced by bacterium clostridium hystolyticum. 5. The method of claim 1, wherein the collagenase composition additionally comprises at least one member of the group consisting of trypsin, caseinase, clostripain, hyaluronidase and combinations thereof. 6. The method of claim 1 wherein the composition additionally comprises an adhesive. 7. The method of claim 1, wherein the defect or injury comprises a tear and wherein an adhesive is applied to the meniscus at the tear to seal and prevent escape of collagenase into the region surrounding the tear. 8. The method of claim 1, wherein the defect or injury comprises a tear and wherein the first meniscal surface and second meniscal surface are apposed by a mechanical repair method following application of collagenase. 9. The method of claim 8 wherein the mechanical repair method comprises a suturing technique. 10. The method of claim 8 wherein the mechanical repair method comprises a barbed or threaded device inserted across the tear which holds the tear faces together. 11. The method of claim 8 wherein the mechanical repair method comprises a hybrid suture/device meniscal repair system. 12. The method of claim 1, wherein the collagenase scavenger solution comprises a collagen solution. 13. The method of claim 1, wherein the collagenase composition comprises a carrier selected from the group consisting of biodegradable surgical mesh, woven fabric, felt, and nonwoven fabric. 14. The method of claim 1 wherein the collagenase composition additionally comprises a nonresorbable carrier comprising a polymer selected from the group consisting of polypropylene, polyethylene, polytetrafluoroethylene (PTFE), polyester and combinations thereof. 15. The method of claim 1, wherein the collagenase is applied to a biocompatible substrate, which is applied to the defect or injury. 16. The method of claim 1 and further comprising applying collagenase composition to both the first surface and the second surface.

Details for Patent 8,323,642

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Bausch & Lomb Incorporated	VITRASE	hyaluronidase	Injection	021640	05/05/2004		2039-03-29
Bausch & Lomb Incorporated	VITRASE	hyaluronidase	Injection	021640	12/02/2004		2039-03-29
Amphastar Pharmaceuticals, Inc.	AMPHADASE	hyaluronidase	Injection	021665	10/26/2004		2039-03-29
Akorn, Inc.	HYDASE	hyaluronidase	Injection	021716	10/25/2005		2039-03-29
Smith & Nephew, Inc.	SANTYL	collagenase	Ointment	101995	06/04/1965		2039-03-29