[Effects of recombined pcDNA3.1-hBMP-2 transfection on human marrow stromal stem cells proliferation and vascular endothelial growth factor expression].

Objective To construct the recombined DNA pcDNA3.1-hBMP-2 and transfect into human marrow stromal stem cells (MSCs) in vitro, and to explore the effects of transfection on cellular proliferation and expression of vascular endothelial growth factor (VEGF). Methods The expression of human bone morphogenetic protein 2(hBMP-2) in these cells after transfection was determined by in situ hybridization and immunohistochemical analysis and Western blot analysis. The changes of cell proliferation were observed by flow cytometry. The effects of BMP-2 gene transfection on expression of VEGF in the cells were analyzed by in situ hybridization of VEGF cDNA probe. Results Stable expression of hBMP-2 in pcDNA3.1-hBMP-2 transfected MSCs was confirmed in the levels of mRNA and protein. Cellular proportion in S period increased, which indicated that the synthesis of cell DNA increased. The expression of VEGF in the cells increased obviously. Conclusion With the help of lipofectamine, the pcDNA3.1-hBMP-2 were transfected into human MSCs successfully. hBMP-2 plays an important role in promoting cellular proliferation and vascular generation during bone repair.