期刊
BIOMATERIALS
卷 30, 期 28, 页码 5041-5048出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biomaterials.2009.05.077
关键词
Akermanite; beta-Tricalcium phosphate; Extract; Mesenchymal stem cell; Rabbit femur defect models
资金
- National Basic Science Research Program of China (973 Program) [2005CB522704, 2007CB936101]
- Natural Science Foundation of China [30730034, 30600628]
- Science and Technology Commission of Shanghai Municipality [08JC1420800]
- Program for Shanghai Key Laboratory of Orthopaedic Implant [08DZ2230330]
This study investigated the effects of a calcium magnesium silicate bioceramic (akermanite) for bone regeneration in vitro and in vivo, with P-tricalcium phosphate (beta-TCP) as a control. In vitro, the human bone marrow-derived mesenchymal stromal cells (hBMSCs) were cultured in an osteogenic medium supplemented with a certain concentration of two bioceramics' extracts for 20 days. An MTT assay showed that akermanite extract promoted proliferation of hBMSC significantly more than did beta-TCP extract. The results of alkaline phosphatase (ALP) activity test and the expression of osteogenic marker genes such as ALP, osteopontin (OPN), osteocalcin (OCN) and bone sialoprotein (BSP) demonstrated that the osteogenic differentiation of hBMSC was enhanced more by akermanite extract than by beta-TCP extract. In vivo, a histomorphology analysis and histomorphometry of the two porous bioceramics implants in rabbit femur defect models indicated that both in early- and late-stage implantations, akermanite promoted more osteogenesis and biodegradation than did beta-TCP; and in late-stage implantations, the rate of new bone formation was faster in akermanite than in beta-TCP These results suggest that akermanite might be a potential and attractive bioceramic for tissue engineering. (C) 2009 Elsevier Ltd. All rights reserved.
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