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Chinese Journal of Stomatological Research(Electronic Edition) ›› 2017, Vol. 11 ›› Issue (02): 65-72. doi: 10.3877/cma.j.issn.1674-1366.2017.02.001

Special Issue:

• Basic Science Research •     Next Articles

Analysis on Wnt signaling phospho antibody array in the process of rat bone marrow mesenchymal stem cells differentiated into odontoblast-like cells

Yanling Huang1, Jianmao Zheng1, Junqi Ling1,()   

  1. 1. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
  • Received:2017-02-08 Online:2017-04-01 Published:2017-04-01
  • Contact: Junqi Ling
  • About author:
    Corresponding author: Ling Junqi, Email:

Abstract:

Objective

To investigate the changes of protein phosphorylation level of Wnt signaling in the process of rat bone marrow mesenchymal stem cells (BMSCs) differentiated into odontoblast-like cell and preliminarily discuss the mechanism.

Methods

We seperated, cultured and purified BMSCs by the method of whole bone marrow adherence. Tooth germ cell-conditioned medium was used to induce the differentiation of rats bone marrow mesenchymal stem cells into odontoblast-like cells. A phospho-specific antibody microarray (PNT227) targeting the Wnt Phospho signaling pathway was used to find the alterations of the downstream signaling events. Western blot was carried out to validate the antibody array results. The SPSS 20.0 software was used as the data processing tool. T-test and t'-test were used to analyze the difference between the groups.

Results

BMSCs obtained by whole bone marrow adherence method had the potential of self-renew and multilineage differentiation. After co-culture with TGC-CM for 2 days, BMSCs began to exhibit long spindle process. After 7 days, the cells had a long spindle shape and a tightly packed arrangement. The expression of DSPP (t = 3.700, P= 0.021) , DMP1 (t = 3.237, P= 0.032) , RUNX2 (t = 12.09, P<0.001) , ALP (t = 62.83, P<0.001) were enhanced after induction for 7 days. Results of Wnt signaling phospho antibody array showed 27 phosphorylation sites were up-regulated or down-regulated. Western blot analysis showed that nuclear expression of β-catenin (t= 4.588, P= 0.044) and the phosphorylation level of PKCδ (t= 5.438, P= 0.032) were enhanced, while the phosphorylation level of AKT (t= 30.85, P= 0.001) was reduced, which was consistent with the array.

Conclusion

Changes of phosphorylation site of Wnt signaling in the process of BMSCs differentiated into odontoblast-like cells were found.

Key words: Bone marrow, Mesenchymal stem cells, Odontoblast, Cell differentiation, Wnt signaling phospho antibody array

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