Androgen receptor splice variant 7 in castration-resistant prostate cancer: Clinical considerations

Research output: Contribution to journalReview articlepeer-review

Abstract

Constitutively-active ligand-independent splice variants of the androgen receptor are an adaptive response by prostate cancer cells to escape androgen deprivation therapy and novel androgen receptor-directed treatments. Androgen receptor splice variant 7 is the most common splice variant detected in clinical biospecimens, and emerging data now suggest that the presence of tumoral androgen receptor splice variant 7 might be indicative of primary and acquired resistance to next-generation androgen pathway inhibitors, such as abiraterone and enzalutamide. At the same time, taxane chemotherapy might retain its efficacy regardless of androgen receptor splice variant 7 status, thus suggesting the potential for a predictive biomarker guiding treatment selection in men with metastatic castration-resistant prostate cancer. Herein, we review the preclinical data elucidating the structure and function of androgen receptor splice variant 7, we describe the existing clinical data using this biomarker in metastatic castration-resistant prostate cancer, and we highlight potential therapeutic strategies to target androgen receptor splice variant 7-expressing prostate cancer.

Original languageEnglish (US)
Pages (from-to)646-653
Number of pages8
JournalInternational Journal of Urology
Volume23
Issue number8
DOIs
StatePublished - Aug 1 2016
Externally publishedYes

Bibliographical note

Funding Information:
ESA has received funding from the Prostate Cancer Foundation (PCF), the Patrick C. Walsh Fund, and NIH grants R01 CA185297 and P30 CA006973.

Publisher Copyright:
© 2016 The Japanese Urological Association

Keywords

  • androgen
  • androgen receptor splice variant 7
  • hormone therapy
  • prostate cancer
  • resistance

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