title: Tissue-engineered neogenesis of human-shaped mandibular condyle from rat mesenchymal stem cells.
abstract: The temporomandibular joint is susceptible to diseases and trauma that may ultimately lead to structural degeneration. Current approaches for replacing degenerated mandibular condyles suffer from deficiencies such as donor site morbidity, immunorejection, implant wear and tear, and pathogen transmission. The hypothesis of this study was that a human-shaped mandibular condyle can be tissue-engineered from rat mesenchymal stem cells (MSCs) encapsulated in a biocompatible polymer. Rat bone marrow MSCs were isolated and induced to differentiate into chondrogenic and osteogenic cells in vitro, and encapsulated in poly(ethylene glycol)-based hydrogel in two stratified layers molded into the shape of a cadaver human mandibular condyle. Eight weeks following in vivo implantation of the bilayered osteochondral constructs in the dorsum of immunodeficient mice, mandibular condyles formed de novo. Microscopic evaluation of the tissue-engineered mandibular condyle demonstrated two stratified layers of histogenesis of cartilaginous and osseous phenotypes. The current approach is being refined for ultimate therapeutic applications.
authors: Tissue Engineering Laboratory, Rm. 237, Department of Orthodontics (MC 841), University of Illinois at Chicago, 801 S. Paulina Street, Chicago, IL 60612-7211, USA.
authors: A
authors: A
authors: Alhadlaq
authors: J J
authors: JJ
authors: Mao
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000502:physiology; D001842:Bone and Bones / Q000033:anatomy & histology / Q000502:physiology; D002356:Cartilage / Q000033:anatomy & histology / Q000502:physiology; D002454:Cell Differentiation; D002469:Cell Separation; D020219:Chondrogenesis / Q000502:physiology; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry; D008297:Male; D008335:Mandibular Condyle / Q000254:growth & development / Q000502:physiology*; D059630:Mesenchymal Stem Cells / Q000502:physiology*; D051379:Mice; D016513:Mice, SCID; D010012:Osteogenesis / Q000502:physiology; D010641:Phenotype; D011092:Polyethylene Glycols / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D023822:Tissue Engineering
chemical_list: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols