当前位置： SCI文献检索 > JOURNAL OF ENDODONTICS期刊下所有文献 > Tumor Necrosis Factor Alpha Stimulates Proliferation of Dental Pulp Stem Cells via Akt/Glycogen Synthase Kinase-3β/Cyclin D1 Signaling Pathway.

Tumor Necrosis Factor Alpha Stimulates Proliferation of Dental Pulp Stem Cells via Akt/Glycogen Synthase Kinase-3β/Cyclin D1 Signaling Pathway.

Abstract：

INTRODUCTION:It has been widely accepted that dental pulp stem cells (DPSCs), which are a class of self-renewal and differentiation potential of adult stem cells, play an important role in the repair procession of pulp's inflammation. We investigated whether tumor necrosis factor alpha (TNF-α) could induce the proliferation of DPSCs and clarified the potential mechanism of this proliferation. METHODS:Cell Counting Kit-8 assay (Dojindo Laboratories, Mashiki-machi, Kumamoto, Japan) and 5-ethynyl-2'-deoxyuridine-based proliferation assays were determined to investigate various concentrations or hours of TNF-α inducing a cell number change of DPSCs. Next, flow cytometry analysis was performed to investigate the main cell cycle phase process of DPSCs. Furthermore, the signaling pathway of TNF-α-induced proliferation of DPSCs was analyzed using Western blot analysis. Then, inhibitors were added to confirm the mechanism of this signaling pathway. RESULTS:TNF-α induced the proliferation of DPSCs in a dose- and time-dependent manner. Cyclin D1, which controlled the cell cycle process from the G1 to the S phase, was up-regulated by TNF-α in a time-dependent manner, whereas its overexpression alone increased DPSC proliferation. Furthermore, TNF-α was capable of inducing Akt/GSK-3β signaling pathway activation. Blockage of phosphoinositide 3-kinase/Akt by their kinase or genetic inhibitors could significantly reduce TNF-α-induced proliferation of DPSCs. CONCLUSIONS:This study confirmed that TNF-α induced the proliferation of DPSCs by regulating the Akt/GSK-3β/cyclin D1 signaling pathway and then provided a suitable number for the requirements of cell differentiation.

journal_name

J Endod

journal_title

Journal of endodontics

authors

Qin Z,Li Y,Li Y,Liu G

doi

10.1016/j.joen.2015.02.020

subject

Has Abstract

pub_date

2015-07-01 00:00:00

pages

1066-72

issue

7

eissn

0099-2399

issn

1878-3554

pii

S0099-2399(15)00180-6

journal_volume

41

pub_type

杂志文章

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