AR activates YAP/TAZ differentially in prostate cancer

Author:

Salem Omar12,Jia Siyang12,Qian Bin-Zhi3,Hansen Carsten Gram12ORCID

Affiliation:

1. The University of Edinburgh,

2. Institute for Regeneration and Repair, The University of Edinburgh

3. Medical Research Council Centre for Reproductive Health, College of Medicine and Veterinary Medicine, Queen’s Medical Research Institute, The University of Edinburgh

Abstract

The Hippo signalling pathway is a master regulator of cell growth, proliferation, and cancer. The transcriptional coregulators of the Hippo pathway, YAP and TAZ, are central in various cancers. However, how YAP and TAZ get activated in most types of cancers is not well understood. Here, we show that androgens activate YAP/TAZ via the androgen receptor (AR) in prostate cancer (PCa), and that this activation is differential. AR regulates YAP translation while inducing transcription of the TAZ encoding gene,WWTR1. Furthermore, we show that AR-mediated YAP/TAZ activation is regulated by the RhoA GTPases transcriptional mediator, serum response factor (SRF). Importantly, in prostate cancer patients,SRFexpression positively correlates withTAZand the YAP/TAZ target genesCYR61andCTGF. We demonstrate that YAP/TAZ are not essential for sustaining AR activity, however, targeting YAP/TAZ or SRF sensitize PCa cells to AR inhibition in anchorage-independent growth conditions. Our findings dissect the cellular roles of YAP, TAZ, and SRF in prostate cancer cells. Our data emphasize the interplay between these transcriptional regulators and their roles in prostate tumorigenesis and highlight how these insights might be exploited therapeutically.

Funder

Worldwide Cancer Research

LifeArc-CSO

Wellcome Trust

Chinese Scholarship Council

Publisher

Life Science Alliance, LLC

Subject

Health, Toxicology and Mutagenesis,Plant Science,Biochemistry, Genetics and Molecular Biology (miscellaneous),Ecology

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