《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2016, Vol. 22 ›› Issue (12): 1399-1398.doi: 10.3969/j.issn.1006-9771.2016.12.007

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Cell Cycle Synchronization Methods of Bone Marrow Mesenchymal Stem Cells and Its Effect on Neural Differentiation 

LI Man-li1, ZHAO Wen2, GAO Yu-dan2, DUAN Hong-mei1, YANG Zhao-yang2, LI Xiao-guang1,2   

  1. 1. Department of Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China;
    2. Department of Neurobiology, Capital Medical University, Beijing 100069, China
  • Received:2016-06-17 Published:2016-12-25 Online:2017-01-15
  • Contact: LI Xiao-guang. E-mail: lxgchina@sina.com

Abstract: Objective To analyze the effect of different treatment conditions on cells synchronization in G0/G1 phase to get the best condition, and to explore its effect on neural differentiation of bone marrow mesenchymal stem cells (BMSCs) induced by basic fibroblast growth factor (bFGF).Methods BMSCs were isolated and cultured in 5%, 1%, 0.5%, 0.1%, 0 fetal bovine serum (FBS) respectively, for 24 hours and 48 hours. After PI staining, cell cycle proportions of each phase were detected by flow cytometry, and were compared with the normal group (10% FBS). After the optimal treatment condition was got, 20 ng/ml bFGF was added into synchronization group and unsynchronization group 3 days and 7 days, respectively. The expression of Nestin and Tuj-1 were detected with immunofluorescence.Results Adult rat BMSCs were isolated from bone marrow and cultured, after passage, the cells were with long spindle shape. Compared with the normal group, the cell proportion of G1/G0 phase increased under different treatments, peaked with (94.274±0.468)% under 1% FBS, 48 hours (F=39.91, P<0.001). After bFGF induction for 3 days, the Nestin+ cell number was higher in the synchronization group than in the unsynchronization group [(80.3±2.4)% vs. (12.1±1.5)%] (F=28.25, P<0.001). After bFGF induction for 7 days, the Tuj-1+ cell number was higher in the synchronization group than in the unsynchronization group [(74.8±3.2%)% vs. (19.3±2.5)%] (F=17.95, P<0.001).Conclusion 1% FBS, 48 hours is the optimal condition to BMSCs synchronization in G0/G1 phase, which can promote the neural differentiation of BMSCs.

Key words: bone marrow mesenchymal stem cells, cell cycle, synchronization, serum starvation, neural differentiation, rats

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