Authors
Manish Kohli, Yeung Ho, David W Hillman, Jamie L Van Etten, Christine Henzler, Rendong Yang, Jamie M Sperger, Yingming Li, Elizabeth Tseng, Ting Hon, Tyson Clark, Winston Tan, Rachel E Carlson, Liguo Wang, Hugues Sicotte, Ho Thai, Rafael Jimenez, Haojie Huang, Peter T Vedell, Bruce W Eckloff, Jorge F Quevedo, Henry C Pitot, Brian A Costello, Jin Jen, Eric D Wieben, Kevin AT Silverstein, Joshua M Lang, Liewei Wang, Scott M Dehm
Publication date
2017/8/15
Journal
Clinical Cancer Research
Volume
23
Issue
16
Pages
4704-4715
Publisher
American Association for Cancer Research
Description
Purpose: Androgen receptor (AR) variant AR-V7 is a ligand-independent transcription factor that promotes prostate cancer resistance to AR-targeted therapies. Accordingly, efforts are under way to develop strategies for monitoring and inhibiting AR-V7 in castration-resistant prostate cancer (CRPC). The purpose of this study was to understand whether other AR variants may be coexpressed with AR-V7 and promote resistance to AR-targeted therapies.
Experimental Design: We utilized complementary short- and long-read sequencing of intact AR mRNA isoforms to characterize AR expression in CRPC models. Coexpression of AR-V7 and AR-V9 mRNA in CRPC metastases and circulating tumor cells was assessed by RNA-seq and RT-PCR, respectively. Expression of AR-V9 protein in CRPC models was evaluated with polyclonal antisera. Multivariate analysis was performed to test whether …
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