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Int. J. Mol. Sci. 2013, 14(7), 13511-13524; doi:10.3390/ijms140713511
Article

p38β, A Novel Regulatory Target of Pokemon in Hepatic Cells

1,2
, 2,* , 2
, 3
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 and 1,2,4,*
Received: 2 May 2013 / Revised: 8 June 2013 / Accepted: 10 June 2013 / Published: 27 June 2013
(This article belongs to the Special Issue Molecular Bases of Cancer Research)
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Abstract

Pokemon is an important proto-oncogene involved in various biological processes and cancer development, such as cell differentiation, tumorigenesis and metastasis. Pokemon is recognized as a transcription factor localized upstream of several oncogenes, regulating their expression. p38MAPKs act as key regulatory factors in cellular signaling pathways associated with inflammatory responses, cell proliferation, differentiation and survival. p38β, a member of p38MAPK family, is closely correlated with tumorigenesis, but the mechanism of activation remains unclear. In this study, we found overexpression of Pokemon promoted the growth, migration and invasion of HepG2 cells. However, a p38 inhibitor SB202190 efficiently attenuated the promoting effect of Pokemon in the HepG2 cells. Targeted expression or silencing of Pokemon changed cellular p38β protein level and phosphorylation of downstream ATF2 in the p38 signaling pathway. Both dual luciferase report assay and ChIP assay suggested that p38β is a novel regulatory target of the transcription factor Pokemon and positively regulated by Pokemon in hepatic cells.
Keywords: Pokemon; p38β; transcription factor; hepatic cell; SB202190 Pokemon; p38β; transcription factor; hepatic cell; SB202190
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Chen, Z.; Liu, F.; Zhang, N.; Cao, D.; Liu, M.; Tan, Y.; Jiang, Y. p38β, A Novel Regulatory Target of Pokemon in Hepatic Cells. Int. J. Mol. Sci. 2013, 14, 13511-13524.

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