Abstract
Dental pulp stem cells (DPSCs) are a type of mesenchymal stem cells, which have the self-renewal and multi-lineage differentiation potential, including chondrocytes, adipocytes, neural cells and osteoblasts. So they play a significant role in pulp repair and bone regeneration. Oncostatin M (OSM), one of the IL-6 family cytokines, inhibits adipogenic differentiation and stimulates osteogenic differentiation of human bone marrow mesenchymal stem cells. However, the effect of OSM on DPSCs is unclear. We found that OSM induced osteogenic differentiation of DPSCs, promoting matrix mineralization as measured by Alizarin Red S staining. OSM also increased expression of osteogenesis-associated gene products Alkaline phosphatase, Bone morphogenetic protein 2 (BMP2), Runt-related transcription factor 2 and Osteocalcin (OCN) as assessed by immunoblotting. We also found that OSM activated the Signal Transducer And Activator Of Transcription 3 (STAT3) pathway during the osteogenic differentiation of DPSCs. Blocking the osteogenic differentiation by silencing of STAT3 can significantly inhibit OSM-induced osteogenic differentiation of DPSCs and the expression of related genes, furthermore matrix mineralization was also suppressed. In summary, OSM promotes osteoblastic differentiation of DPSCs and osteogenesis-related genes expression through the JAK3/STAT3 signaling pathway which may be useful for the autologous transplantation of DPSCs.
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Abbreviations
- DPSCs:
-
Dental pulp stem cells
- MSCs:
-
Mesenchymal stem cells
- OSM:
-
Oncostatin M
- STAT3:
-
Signal transducer and activator of transcription 3
- ALP:
-
Alkaline phosphatase
- BMP2:
-
Bone morphogenetic protein 2
- Runx2:
-
Runt-related transcription factor 2
- OC:
-
Osteogenic differentiation
- JAK3:
-
Janus kinase 3
- hADSCs:
-
Human adipose mesenchymal stem cells
- OCN:
-
Osteocalcin
- siJAK3:
-
JAK3 siRNA
- siSTAT3:
-
STAT3 siRNA
- OSMR:
-
Oncostatin M receptor
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Acknowledgments
This work is supported by National Natural Science Foundation of China under Grant 81500809 and Funding of Jiangsu Innovation Program for Graduate Education KYZZ15-0091, the Fundamental Research Funds for the Central Universities; the Graduate Student Innovation of Science and Technology Projects in Jiangsu Province (Grant no. SJLX0588); the “Top Six Types of Talents” Financial Assistance of Jiangsu Province Grant (No. 10).
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Xingmei Feng and Shuling Shen contributed equally to this work.
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Feng, X., Shen, S., Cao, P. et al. The role of oncostatin M regulates osteoblastic differentiation of dental pulp stem cells through STAT3 pathway. Cytotechnology 68, 2699–2709 (2016). https://doi.org/10.1007/s10616-016-9995-9
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DOI: https://doi.org/10.1007/s10616-016-9995-9