1. Deep and Durable Prostate-specific Antigen Response to Darolutamide with Androgen Deprivation Therapy and Docetaxel, and Association with Clinical Outcomes for Patients with High- or Low-volume Metastatic Hormone-sensitive Prostate Cancer: Analyses of the Randomized Phase 3 ARASENS Study.
- Author
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Saad F, Hussain MHA, Tombal B, Fizazi K, Sternberg CN, Crawford ED, Nordquist LT, Bögemann M, Tutrone R, Shore ND, Belkoff L, Fralich T, Jhaveri J, Srinivasan S, Li R, Verholen F, Kuss I, and Smith MR
- Subjects
- Humans, Male, Double-Blind Method, Aged, Prostatic Neoplasms drug therapy, Prostatic Neoplasms pathology, Prostatic Neoplasms blood, Prostatic Neoplasms mortality, Disease Progression, Treatment Outcome, Prostatic Neoplasms, Castration-Resistant drug therapy, Prostatic Neoplasms, Castration-Resistant pathology, Prostatic Neoplasms, Castration-Resistant blood, Prostatic Neoplasms, Castration-Resistant mortality, Middle Aged, Benzamides therapeutic use, Tumor Burden, Time Factors, Neoplasm Metastasis, Kallikreins blood, Prostate-Specific Antigen blood, Docetaxel therapeutic use, Docetaxel administration & dosage, Androgen Antagonists therapeutic use, Androgen Antagonists administration & dosage, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Pyrazoles therapeutic use
- Abstract
Background and Objective: Addition of darolutamide to androgen deprivation therapy (ADT) and docetaxel significantly improved overall survival (OS) in ARASENS (NCT02799602). Here we report on prostate-specific antigen (PSA) responses and their association with outcomes., Methods: ARASENS is an international, double-blind, phase 3 study in patients with metastatic hormone-sensitive prostate cancer (mHSPC) randomized to darolutamide 600 mg orally twice daily (n = 651) or placebo (n = 654), both with ADT + docetaxel. The proportion of patients with undetectable PSA (<0.2 ng/ml) and time to PSA progression (≥25% relative and ≥2 ng/ml absolute increase from nadir) were compared between groups in prespecified exploratory analyses. PSA outcomes by disease volume and the association of undetectable PSA with OS and times to castration-resistant prostate cancer (CRPC) and PSA progression were assessed in post hoc analyses., Key Findings and Limitations: The proportion of patients with undetectable PSA at any time was more than doubled with darolutamide versus placebo, at 67% versus 29% in the overall population, 62% versus 26% in the high-volume subgroup, and 84% versus 38% in the low-volume subgroup. Darolutamide delayed time to PSA progression versus placebo, with hazard ratios of 0.26 (95% confidence interval [CI] 0.21-0.31) in the overall population, 0.30 (95% CI 0.24-0.37) in the high-volume subgroup, and 0.093 (95% CI 0.047-0.18) in the low-volume subgroup. Undetectable PSA at 24 wk was associated with longer OS, with a hazard ratio of 0.49 (95% CI 0.37-0.65) in the darolutamide group, as well as longer times to CRPC and PSA progression, with similar findings in the disease volume subgroups., Conclusions and Clinical Implications: Darolutamide + ADT + docetaxel led to deep and durable PSA responses in patients with high- or low-volume mHSPC. Achievement of undetectable PSA (<0.2 ng/ml) was correlated with better clinical outcomes., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
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