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Abstract
Introduction: The FDA approval of docetaxel for metastatic castration-resistant prostate cancer (mCRPC) in 2005 marked a major milestone, as it was the first approved agent for this disease that demonstrated a survival advantage in Phase III assessment of this disease. Since 2009, several other agents have been approved by FDA, including sipuleucel-T, abiraterone, cabazitaxel and enzalutamide. Enzalutamide, a potent antiandrogen that blocks nuclear translocation of the androgen receptor (AR), is the most recently approved of these agents.
Areas covered: The clinical development of enzalutamide is discussed, with attention given as to how this agent will most appropriately be used among a growing list of agents for mCRPC. A MEDLINE search was conducted to identify all relevant published datasets pertaining to the drug. In addition, relevant ASCO and ESMO abstracts were searched.
Expert opinion: The current role and sequencing of enzalutamide may change drastically based on studies such as PREVAIL (a Phase III pre-chemotherapy assessment of enzalutamide) and planned studies to assess relevant combinations (i.e., enzalutamide with abiraterone). Outside of clinical efficacy, issues such as drug cost may ultimately dictate our utilization of agents such as enzalutamide for mCPRC. Although the development of biomarkers to guide therapy for mCRPC is ideal, there are inherent challenges in establishing biomarker-driven treatment.