牙源性间充质干细胞对成骨前体细胞成骨分化的影响

目的:探讨牙源性间充质干细胞对成骨前体细胞成骨分化的影响.方法:将小鼠成骨前体细胞MC3T3-El分为两组,观察组为牙源性间充质干细胞与MC3T3-E1细胞共培养,对照组为单一MC3T3-E1细胞培养.采用CCK-8法检测细胞增殖水平,采用酶联免疫法检测碱性磷酸酶(Alkaline phosphatase,ALP)活性...

Effects of Odontogenic Mesenchymal Stem Cells on Osteogenic Differentiation of Osteoblast Precursor Cells

ABSTRACT Objective: To investigate the effects of odontogenic mesenchymal stem cells on osteogenic differentiation of osteoblast precursor cells. Methods: The MC3T3-E1 mouse osteoblast precursor cells were divided into two groups. The observation group were co-cultured with odontogenic mesenchymal stem cells and MC3T3-E1 cells. The control group were cultured with single MC3T3-E1 cell. CCK-8 method were used to detect cell proliferation level, enzyme-linked immunoassay were used to detect Alkaline phosphatase (ALP) activity and alizarin red staining, and qRT-PCR and Western blot were used to detect ALP and osteopontin (osteopontin, OPN) mRNA and protein expression levels. Results: After the cells were co-cultured for 1 and 3 days, the cell proliferation index and ALP activity in the observation group were significantly higher than those in the control group (P<0.05). Compared with the control group, the mineralized nodules in the observation group increased significantly, and they were reddish brown after stained with alizarin red. After co-culture of cells for 1 and 3 days, the relative expression levels of ALP, OPN mRNA and protein in the observation group were significantly higher than those in the control group (P<0.05). Conclusion: Dental derived mesenchymal stem cells can promote the expression of ALP and OPN of osteoblast precursor cells, increase ALP activity, increase cell proliferation ability, induce mineralization, and thus promote osteogenic differentiation.