Cited by 2,710Prostate Cancer Treatment and ResearchProstate Cancer Diagnosis and TreatmentLung Cancer Treatments and Mutations

AR-V7 and Resistance to Enzalutamide and Abiraterone in Prostate Cancer

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Antonarakis, Emmanuel S., Lu, Changxue, Wang, Hao, Luber, Brandon, Nakazawa, Mary, Roeser, Jeffrey C., Chen, Yan, Mohammad, Tabrez A. +13 more·2014·New England Journal of Medicine

Abstract

BACKGROUND: The androgen-receptor isoform encoded by splice variant 7 lacks the ligand-binding domain, which is the target of enzalutamide and abiraterone, but remains constitutively active as a transcription factor. We hypothesized that detection of androgen-receptor splice variant 7 messenger RNA (AR-V7) in circulating tumor cells from men with advanced prostate cancer would be associated with resistance to enzalutamide and abiraterone. METHODS: We used a quantitative reverse-transcriptase-polymerase-chain-reaction assay to evaluate AR-V7 in circulating tumor cells from prospectively enrolled patients with metastatic castration-resistant prostate cancer who were initiating treatment with either enzalutamide or abiraterone. We examined associations between AR-V7 status (positive vs. negative) and prostate-specific antigen (PSA) response rates (the primary end point), freedom from PSA progression (PSA progression-free survival), clinical or radiographic progression-free survival, and overall survival. RESULTS: A total of 31 enzalutamide-treated patients and 31 abiraterone-treated patients were enrolled, of whom 39% and 19%, respectively, had detectable AR-V7 in circulating tumor cells. Among men receiving enzalutamide, AR-V7-positive patients had lower PSA response rates than AR-V7-negative patients (0% vs. 53%, P=0.004) and shorter PSA progression-free survival (median, 1.4 months vs. 6.0 months; P<0.001), clinical or radiographic progression-free survival (median, 2.1 months vs. 6.1 months; P<0.001), and overall survival (median, 5.5 months vs. not reached; P=0.002). Similarly, among men receiving abiraterone, AR-V7-positive patients had lower PSA response rates than AR-V7-negative patients (0% vs. 68%, P=0.004) and shorter PSA progression-free survival (median, 1.3 months vs. not reached; P<0.001), clinical or radiographic progression-free survival (median, 2.3 months vs. not reached; P<0.001), and overall survival (median, 10.6 months vs. not reached, P=0.006). The association between AR-V7 detection and therapeutic resistance was maintained after adjustment for expression of full-length androgen receptor messenger RNA. CONCLUSIONS: Detection of AR-V7 in circulating tumor cells from patients with castration-resistant prostate cancer may be associated with resistance to enzalutamide and abiraterone. These findings require large-scale prospective validation. (Funded by the Prostate Cancer Foundation and others.).

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Authors
Antonarakis, E. S., Lu, C., Wang, H., Luber, B., Nakazawa, M., Roeser, J. C., Chen, Y., Mohammad, T. A., Chen, Y., Fedor, H. L., Lotan, T. L., Zheng, Q., De Marzo, A. M., Isaacs, J. T., Isaacs, W. B., Nadal, R., Paller, C. J., Denmeade, S. R., Carducci, M. A., Eisenberger, M. A., & Luo, J.
Affiliations
  • Johns Hopkins University (US)
  • The University of Texas at San Antonio Health Science Center (US)
Venue
New England Journal of Medicine
Published
2014-09-11
Volume
371
Issue
11
Pages
1028-1038
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2156923287
Cited by
2,710
References
34
Citations by year
2026: 131 · 2025: 136 · 2024: 166 · 2023: 191 · 2022: 209 · 2021: 241 · 2020: 241 · 2019: 247 · 2018: 252 · 2017: 301 · 2016: 327 · 2015: 230 · 2014: 33 · 2013: 2
FWCI
238.33
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (UL1TR001079)
  • National Cancer Institute (P50CA058236, T32CA009071, P30CA006973)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Diagnosis and Treatment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
Keywords
AR-V7, androgen receptor splice variants, enzalutamide resistance, abiraterone resistance, castration-resistant prostate cancer, circulating tumor cells, metastatic prostate cancer, androgen receptor, treatment response, progression-free survival, overall survival, PSA response, predictive biomarkers, androgen deprivation therapy, androgen receptor isoforms
MeSH terms
Androstenes, Androstenols, Benzamides, Humans, Male, Morphinans, Nitriles, Phenylthiohydantoin, Prostatic Neoplasms, Receptors, Androgen, RNA, Neoplasm, Survival Analysis, Drug Resistance, Neoplasm, Reverse Transcriptase Polymerase Chain Reaction

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