Enhancing in vivo vascularized bone formation by cobalt chloride-treated bone marrow stromal cells in a tissue engineered periosteum model.
The periosteum plays an indispensable role in both bone formation and bone defect healing. In this study we constructed an artificial in vitro periosteum by incorporating osteogenic differentiated bone marrow stromal cells (BMSCs) and cobalt chloride (CoCl(2))-treated BMSCs. The engineered periostea were implanted both subcutaneously and into skull bone defects in SCID mice to investigate ectopic and orthotopic osteogenesis and vascularization. After two weeks in subcutaneous and four weeks in bone defect areas, the implanted constructs were assessed for ectopic and orthotopic osteogenesis and vascularization by micro-CT, histomorphometrical and immunohistochemical methods. The results showed that CoCl(2) pre-treated BMSCs induced higher degree of vascularization and enhanced osteogenesis within the implants in both ectopic and orthotopic areas. This study provided a novel approach using BMSCs sourced from the same patient for both osteogenic and pro-angiogenic purposes in constructing tissue engineered periosteum to enhance vascularized osteogenesis.
Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove Campus, Brisbane, Qld 4059, Australia.
Wei
W
Fan
Ross
R
Crawford
Yin
Y
Xiao
D000818:Animals; D001483:Base Sequence; D001846:Bone Development / Q000187:drug effects*; D001854:Bone Marrow Cells / Q000187:drug effects*; D002478:Cells, Cultured; D003035:Cobalt / Q000494:pharmacology*; D017931:DNA Primers; D007150:Immunohistochemistry; D008297:Male; D051379:Mice; D016513:Mice, SCID; D023421:Models, Animal; D010521:Periosteum / Q000502:physiology*; D017154:Stromal Cells / Q000187:drug effects*; D023822:Tissue Engineering
D017931:DNA Primers; D003035:Cobalt; C018021:cobaltous chloride