Truncation and constitutive activation of the androgen receptor by diverse genomic rearrangements in prostate cancer
NATURE COMMUNICATIONS(2016)
摘要
Molecularly targeted therapies for advanced prostate cancer include castration modalities that suppress ligand-dependent transcriptional activity of the androgen receptor (AR). However, persistent AR signalling undermines therapeutic efficacy and promotes progression to lethal castration-resistant prostate cancer (CRPC), even when patients are treated with potent second-generation AR-targeted therapies abiraterone and enzalutamide. Here we define diverse AR genomic structural rearrangements ( AR -GSRs) as a class of molecular alterations occurring in one third of CRPC-stage tumours. AR -GSRs occur in the context of copy-neutral and amplified AR and display heterogeneity in breakpoint location, rearrangement class and sub-clonal enrichment in tumours within and between patients. Despite this heterogeneity, one common outcome in tumours with high sub-clonal enrichment of AR -GSRs is outlier expression of diverse AR variant species lacking the ligand-binding domain and possessing ligand-independent transcriptional activity. Collectively, these findings reveal AR -GSRs as important drivers of persistent AR signalling in CRPC.
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关键词
Cancer genomics,Prostate cancer,Targeted resequencing,Science,Humanities and Social Sciences,multidisciplinary
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