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Nat Immunol. 2017 Jul;18(7):800-812. doi: 10.1038/ni.3748. Epub 2017 May 15.

The transcriptional coactivator TAZ regulates reciprocal differentiation of TH17 cells and Treg cells.

Author information

1
State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, Fujian, China.
2
Department of Laboratory Medicine, the First Affiliated Hospital, Medical College of Xiamen University, Xiamen, China.
3
Department of Cancer Biology, Maryland Anderson Cancer Center, University of Texas, Houston, Texas, USA.
4
Institute of Immunology, Innovation Center for Cell Signaling Network, Zhejiang University School of Medicine, Hangzhou, China.
5
Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Hangzhou, China.

Abstract

An imbalance in the lineages of immunosuppressive regulatory T cells (Treg cells) and the inflammatory TH17 subset of helper T cells leads to the development of autoimmune and/or inflammatory disease. Here we found that TAZ, a coactivator of TEAD transcription factors of Hippo signaling, was expressed under TH17 cell-inducing conditions and was required for TH17 differentiation and TH17 cell-mediated inflammatory diseases. TAZ was a critical co-activator of the TH17-defining transcription factor RORγt. In addition, TAZ attenuated Treg cell development by decreasing acetylation of the Treg cell master regulator Foxp3 mediated by the histone acetyltransferase Tip60, which targeted Foxp3 for proteasomal degradation. In contrast, under Treg cell-skewing conditions, TEAD1 expression and sequestration of TAZ from the transcription factors RORγt and Foxp3 promoted Treg cell differentiation. Furthermore, deficiency in TAZ or overexpression of TEAD1 induced Treg cell differentiation, whereas expression of a transgene encoding TAZ or activation of TAZ directed TH17 cell differentiation. Our results demonstrate a pivotal role for TAZ in regulating the differentiation of Treg cells and TH17 cells.

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PMID:
28504697
DOI:
10.1038/ni.3748
[Indexed for MEDLINE]

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