• 1. Department of Orthopaedics, Sichuan University, Chengdu Sichuan, 610041, P. R. China;
  • 2. Laboratory of Stem Cells and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P. R. China;
KONGQingquan, Email: kongspine@126.com
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Objective To investigate the specific microRNA (miRNA) in osteogenic and chondrogenic differentiations of C3H10T1/2 cells. Methods C3H10T1/2 cells were induced to differentiate into osteoblasts and chondrocytes.Specific miRNA more than 2 fold change and 2 average normalized probe signal between C3H10T1/2 and C3H10T1/2-derived osteoblast,and between C3H10T1/2 and C3H10T1/2-derived chondrocytes were screened out by miRNA microarray,and verified by real-time fluorescence quantitative PCR (RT-qPCR). Results Alkaline phosphatase expression of osteogenic induced group was significantly higher than that of control group at 7 days after induced (P<0.05).RT-qPCR results showed the expressions of Runx2,serine protease (Sp7),collagen type I,and osteopontin (OPN) genes were significantly increased at 7,14,and 21 days after induced when compared with before induced (P<0.05).Western blot results showed the expressions of Runx2,Sp7,collagen type I,and OPN proteins of osteogenic induced group were significantly higher than those of control group at 21 days after induced (P<0.05).The expressions of SOX9,collagen type Ⅱ,Aggrecan,and Has2 were significantly increased at 5,10,and 15 days after induced when compared with before induced (P<0.05).The expressions of SOX9,collagen type 2,Aggrecan,and Has2 proteins of chondrogenic induced group were significantly higher than those of control group at 15 days after induced (P<0.05).Totally,10 osteogenic and 3 chondrogenic miRNA more than 2 fold change and 2 average normalized probe signal were screened out by miRNA microarray.RT-qPCR results of these specific miRNAs were similar to microarray results except miR-455-3p. Conclusion Specific miRNAs are screened out by microarray and it is a good foundation for the future study on miRNA functional verification and target gene prediction.

Citation: XINGRong, KONGQingquan, XIANGZhou, YANGJing, LUOJingcong, DENGLi, XIEHuiqi. PRELIMINARY STUDY ON microRNA REGULATED OSTEOGENIC AND CHONDROGENIC DIFFERENTIATION OF MOUSE STEM CELLS. Chinese Journal of Reparative and Reconstructive Surgery, 2014, 28(8): 1009-1016. doi: 10.7507/1002-1892.20140222 Copy

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