title: Behavior of transplanted bone marrow-derived GFP mesenchymal cells in osteochondral defect as a simulation of autologous transplantation.
abstract: To elucidate the behavior of autologously transplanted mesenchymal cells in osteochondral defects, we followed transplanted cells using green fluorescent protein (GFP) transgenic rats, in which all cells express GFP signals in their cytoplasm and nuclei as transplantation donors. Bone marrow-derived mesenchymal cells, which contain mesenchymal stem cells (MSCs), were obtained from transgenic rats. Then, dense mesenchymal cell masses created by hanging-drop culture were transplanted and fixed with fibrin glue into osteochondral defects of wild-type rats. At 24 weeks after surgery, the defects were repaired with hyaline-like cartilage and subchondral bone. GFP positive cells, indicating transplanted mesenchymal-derived cells, were observed in the regenerated tissues for 24 weeks although GFP positive cells decreased in number with time. Because GFP causes no immunological rejection and requires no chemicals for visualization, transplantation between transgenic and wild-type rats can be regarded as a simulation of autologous transplantation, and the survivability of transplanted cells are able to be followed easily and reliably. Thus, the behavior of transplanted mesenchymal cells was able to be elucidated in vivo by this strategy, and the results could be essential in future tissue engineering for the regeneration of osteochondral defects with original hyaline cartilage and subchondral bone.
authors.affiliation: Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan. yasushi@sj8.so-net.ne.jp
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Oshima
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Watanabe
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Matsuda
authors.forename: Shinro
authors.initials: S
authors.lastname: Takai
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Kawata
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D001854:Bone Marrow Cells / Q000473:pathology*; D016026:Bone Marrow Transplantation; D002452:Cell Count; D049109:Cell Proliferation; D002470:Cell Survival; D002478:Cells, Cultured; D005260:Female; D049452:Green Fluorescent Proteins / Q000378:metabolism*; D006614:Hindlimb; D007592:Joint Diseases / Q000473:pathology / Q000601:surgery*; D008648:Mesoderm / Q000166:cytology; D023421:Models, Animal; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013997:Time Factors; D014182:Transplantation, Autologous
chemical_list: D049452:Green Fluorescent Proteins