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SOX9 drives WNT pathway activation in prostate cancer
Fen Ma, … , Steven P. Balk, Xin Yuan
Fen Ma, … , Steven P. Balk, Xin Yuan
Published April 4, 2016
Citation Information: J Clin Invest. 2016;126(5):1745-1758. https://doi.org/10.1172/JCI78815.
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Research Article Oncology Article has an altmetric score of 5

SOX9 drives WNT pathway activation in prostate cancer

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Abstract

The transcription factor SOX9 is critical for prostate development, and dysregulation of SOX9 is implicated in prostate cancer (PCa). However, the SOX9-dependent genes and pathways involved in both normal and neoplastic prostate epithelium are largely unknown. Here, we performed SOX9 ChIP sequencing analysis and transcriptome profiling of PCa cells and determined that SOX9 positively regulates multiple WNT pathway genes, including those encoding WNT receptors (frizzled [FZD] and lipoprotein receptor-related protein [LRP] family members) and the downstream β-catenin effector TCF4. Analyses of PCa xenografts and clinical samples both revealed an association between the expression of SOX9 and WNT pathway components in PCa. Finally, treatment of SOX9-expressing PCa cells with a WNT synthesis inhibitor (LGK974) reduced WNT pathway signaling in vitro and tumor growth in murine xenograft models. Together, our data indicate that SOX9 expression drives PCa by reactivating the WNT/β−catenin signaling that mediates ductal morphogenesis in fetal prostate and define a subgroup of patients who would benefit from WNT-targeted therapy.

Authors

Fen Ma, Huihui Ye, Housheng Hansen He, Sean J. Gerrin, Sen Chen, Benjamin A. Tanenbaum, Changmeng Cai, Adam G. Sowalsky, Lingfeng He, Hongyun Wang, Steven P. Balk, Xin Yuan

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