Recombinant lentiviral vector transfected sheep bone marrow mesenchymal stem cells and osteogenic gene expression changes / 中国组织工程研究

ABSTRACT

METHODS:Lentiviral vectors carrying bFGF and BMP-2 were constructed to transfect sheep bone marrow mesenchymal stem cells. cells were divided into four groupsbFGF group, BMP-2 group, co-transfection group BACKGROUND:Basic fibroblast growth factor (bFGF) can promote the proliferation of bone marrow stromal cells, and bone morphogenetic protein-2 (BMP-2) has an important significance in the induction of new bone formation. OBJECTIVE:To analyze the effects of bFGF, BMP-2 and their co-transfection on the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells and to compare the relative expressions of col agen I, osteocalcin and osteopontin before and after celltransfection, thereby providing theoretical implications for seed cells in the construction of tissue-engineered bone. and control group. The RNA was extracted using real-time quantitative PCR to detect mRNA levels of col agen I, osteocalcin, and osteopontin. RESULTS AND CONCLUSION:Significant difference in non-specific osteogenic gene expressions was found among the four groups (P0.05). In vitro experiments showed that the relative expression of col agen I, osteocalcin and osteopontin were higher in the co-transfection group, indicating the cells from the co-transfection group have strongest osteogenic capacity that are suitable for seed cells for bone tissue engineering.