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Updated: May 14, 2026

A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer
Published on: March 6, 2018
Targeting the androgen receptor in the management of castration-resistant prostate cancer: rationale, progress, and
1Department of Medical Oncology, Princess Margaret Hospital, Toronto, ON.
Abstract:
Since the year 2000, tremendous progress has been made in the understanding of castration-resistant prostate cancer (crpc), a disease state now recognized to retain androgen receptor (ar)-dependency in most cases. That understanding led to the rational design of novel therapeutic agents targeting hormonal pathways in metastatic crpc. Two new drugs-the CYP17 inhibitor abiraterone acetate and the potent ar antagonist enzalutamide-were recently shown to prolong overall survival after chemotherapy treatment in patients with metastatic disease, with the former agent also demonstrating impressive activity in the pre-chemotherapy setting. Other new drugs targeting the ar-as well as drugs targeting heat shock proteins that protect cytoplasmic ar from degradation-are currently undergoing clinical development.This review briefly describes the molecular mechanisms underlying castration resistance and hormonal dependence in prostate tumours and summarizes the current ongoing and completed clinical trials that are targeting hormonal pathways in metastatic crpc. Potential mechanisms of resistance to these novel hormonal agents are reviewed. Finally, future research directions, including questions about drug sequencing and combination, are discussed.
Insights
Significant advancements in understanding castration-resistant prostate cancer (CRPC) have led to new therapies targeting androgen receptor (AR) pathways. Novel drugs like abiraterone acetate and enzalutamide improve survival in metastatic CRPC patients.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Prostate cancer progression involves castration-resistant states.
- Castration-resistant prostate cancer (CRPC) often remains androgen receptor (AR)-dependent.
- Understanding AR pathway dependence is crucial for CRPC treatment.
Purpose of the Study:
- To review molecular mechanisms of CRPC and AR dependence.
- To summarize clinical trials targeting hormonal pathways in metastatic CRPC.
- To discuss resistance mechanisms and future research directions for novel hormonal agents.
Main Methods:
- Literature review of molecular mechanisms in CRPC.
- Summary of completed and ongoing clinical trials for metastatic CRPC.
- Analysis of resistance mechanisms and future therapeutic strategies.
Main Results:
- New drugs, abiraterone acetate and enzalutamide, prolong survival in metastatic CRPC.
- Abiraterone acetate shows efficacy pre-chemotherapy.
- Ongoing development of novel AR-targeting agents and heat shock protein inhibitors.
Conclusions:
- Novel hormonal therapies targeting the AR pathway represent a significant advancement in CRPC treatment.
- Understanding and overcoming resistance mechanisms is critical for future therapeutic development.
- Further research on drug sequencing and combinations is needed to optimize patient outcomes.
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