title: Development and characterisation of a decellularised bovine osteochondral biomaterial for cartilage repair.
abstract: It is proposed that an acellular natural osteochondral scaffold will provide a successful repair material for the early intervention treatment of cartilage lesions, to prevent or slow the progression of cartilage deterioration to osteoarthritis. Here, we investigated the efficacy of methods for the decellularisation of bovine osteochondral plugs. The plugs were subject to four freeze/thaw cycles followed by two cycles of washes in hypotonic solution and low concentration (0.1% w/v) sodium dodecyl sulphate with protease inhibitors. Plugs were treated with nuclease (DNase and RNase) treatment followed by sterilization in peracetic acid. Full tissue decellularisation was achieved as confirmed by histological analysis and DNA quantification, however the resultant acellular matrix had reduced glycosaminoglycan content which led to an increased percent deformation of cartilage. Furthermore, the acellular scaffold was not reproducibly biocompatible. Additional terminal washes were included in the process to improve biocompatibility, however, this led to visible structural damage to the cartilage. This damage was found to be minimised by reducing the cut edge to cartilage area ratio through decellularisation of larger cuts of osteochondral tissue.
authors.affiliation: Faculty of Biological Sciences, University of Leeds, Leeds, UK, h.l.fermor@leeds.ac.uk.
authors.forename: Hazel L
authors.initials: HL
authors.lastname: Fermor
authors.forename: Serena L
authors.initials: SL
authors.lastname: Russell
authors.forename: Sophie
authors.initials: S
authors.lastname: Williams
authors.forename: John
authors.initials: J
authors.lastname: Fisher
authors.forename: Eileen
authors.initials: E
authors.lastname: Ingham
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000138:chemical synthesis*; D001705:Bioprosthesis; D002358:Cartilage, Articular / Q000737:chemistry* / Q000254:growth & development*; D002474:Cell-Free System / Q000737:chemistry / Q000473:pathology; D019245:Compressive Strength; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006244:Hardness; D008422:Materials Testing; D013552:Swine; D054457:Tissue Scaffolds
chemical_list: D001672:Biocompatible Materials