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  • Title: The evolving paradigm of second-line hormonal therapy options for castration-resistant prostate cancer.
    Author: Courtney KD, Taplin ME.
    Journal: Curr Opin Oncol; 2012 May; 24(3):272-7. PubMed ID: 22327837.
    Abstract:
    PURPOSE OF REVIEW: The review examines recent advances in second-line hormonal therapy for the treatment of castrate-resistant prostate cancer (CRPC). RECENT FINDINGS: Recent data highlight the continued importance of androgen signaling in CRPC. These findings have spurred the development of novel inhibitors of adrenal and intra-tumoral androgen synthesis and novel androgen signaling inhibitors with activity in CRPC. In the past year abiraterone acetate, a CYP17 (17α-hydroxylase/17, 20 lyase) inhibitor, received US FDA approval for use in the treatment of metastatic CRPC in patients previously treated with docetaxel. Additionally, the novel androgen signaling inhibitor MDV3100 has been reported to confer a survival advantage compared to placebo in the same patient population. Here we review the scientific rationale for targeting androgen signaling in CRPC and the recent pivotal trials that support the use of novel second-line hormonal therapies. Additionally, we summarize ongoing preclinical and clinical efforts to ascertain and overcome mechanisms of resistance. SUMMARY: Novel inhibitors of extra-gonadal androgen synthesis and androgen receptor function demonstrate the continued importance of androgen signaling in CRPC. These agents have improved clinical outcomes for patients with metastatic CRPC.
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