Substantially non-immunogenic injectable collagen
View Patent ↗The invention provides an article of manufacture comprising a substantially non-immunogenic injectable collagen for implantation into humans. The invention further provides methods for preparing injectable collagen material by removing collagen-containing material from a non-human animal; washing in saline and alcohol; subjecting material to cellular disruption treatment; and digesting the material with a proteoglycan-depleting factor and/or glycosidase and optionally following with a capping treatment. The invention also provides an article of manufacture produced by the method. The injectable collagen material of the invention are substantially non-immunogenic and have substantially the same mechanical properties as a corresponding native soft tissue.
1. A xenogeneic, substantially non-immunogenic collagen-containing material for injection into a human, the collagen-containing material having extracellular components and dead chondrocyte cells with retained native surface glycoproteins substantially lacking immunogenic terminal alpha-1,3-Galactose oligosaccharide structures.
2. The collagen-containing material according to claim 1 in a form of liquid, colloid, semi-solid suspended particulate, gel or paste and combinations thereof.
3. The collagen-containing material of according to claim 2 wherein the collagen-containing material includes extracellular components and substantially only dead cells, the extracellular components and dead cells having substantially no surface alpha-galactosyl moieties and having capping molecules linked to at least a portion of surface carbohydrate moieties.
4. The collagen-containing material according to claim 2 wherein said collagen-containing material is sterilized pursuant to e-beam ionization irradiation.
5. The collagen-containing material according to claim 4 , wherein said sterilization is with a radiation dose approximately equal to 17.8 kGy.
6. The collagen-containing material according to claim 1 irradiated with gamma radiation in the amount of 0.2 MegaRad to about 3 MegaRad.