PMID- 27160947 OWN - NLM STAT- MEDLINE DCOM- 20171226 LR - 20240326 IS - 1873-7560 (Electronic) IS - 0302-2838 (Print) IS - 0302-2838 (Linking) VI - 70 IP - 6 DP - 2016 Dec TI - Phase 2 Study of the Safety and Antitumor Activity of Apalutamide (ARN-509), a Potent Androgen Receptor Antagonist, in the High-risk Nonmetastatic Castration-resistant Prostate Cancer Cohort. PG - 963-970 LID - S0302-2838(16)30133-6 [pii] LID - 10.1016/j.eururo.2016.04.023 [doi] AB - BACKGROUND: Apalutamide is a potent androgen receptor (AR) antagonist that targets the AR ligand-binding domain and prevents AR nuclear translocation, DNA binding, and transcription of AR gene targets. OBJECTIVE: To evaluate the activity and safety of apalutamide in patients with high-risk nonmetastatic castration-resistant prostate cancer (nmCRPC). DESIGN, SETTING, AND PARTICIPANTS: We conducted a multicenter phase 2 study of nmCRPC patients with a high risk for progression (prostate-specific antigen [PSA] >/=8 ng/ml or PSA doubling time [PSA DT] /=50% PSA decline at 12 wk. Median TTPP was 24.0 mo (95% confidence interval [CI], 16.3 mo-not reached [NR]); median MFS was NR (95% CI, 33.4 mo-NR). Most of the patients discontinued study treatment (n=33) due to disease progression (n=11 [22%]) or adverse events (AEs) (n=9 [18%]). The most common AE was fatigue (any grade, n=31 [61%]) although grade >/=3 fatigue was uncommon (n=2 [4%]). These represent the first apalutamide nmCRPC patient clinical data. CONCLUSIONS: In high-risk nmCRPC patients, apalutamide was safe with robust activity based on durable PSA responses and disease control. PATIENT SUMMARY: Antitumor activity and the safety of apalutamide in patients with nonmetastatic castration-resistant prostate cancer support continued development in this setting. TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT01171898. CI - Copyright (c) 2016 European Association of Urology. Published by Elsevier B.V. All rights reserved. FAU - Smith, Matthew R AU - Smith MR AD - Massachusetts General Hospital Cancer Center and Harvard Medical School, Boston, MA, USA. Electronic address: smith.matthew@mgh.harvard.edu. FAU - Antonarakis, Emmanuel S AU - Antonarakis ES AD - Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, MD, USA. FAU - Ryan, Charles J AU - Ryan CJ AD - UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA. FAU - Berry, William R AU - Berry WR AD - Cancer Centers of North Carolina, Raleigh, NC, USA. FAU - Shore, Neal D AU - Shore ND AD - Carolina Urologic Research Center, Myrtle Beach, SC, USA. FAU - Liu, Glenn AU - Liu G AD - University of Wisconsin Carbone Cancer Center, Madison, WI, USA. FAU - Alumkal, Joshi J AU - Alumkal JJ AD - Oregon Health & Science University, Knight Cancer Institute, Portland, OR, USA. FAU - Higano, Celestia S AU - Higano CS AD - University of Washington, Fred Hutchinson Cancer Research Center, Seattle, WA, USA. FAU - Chow Maneval, Edna AU - Chow Maneval E AD - Aragon Pharmaceuticals, San Diego, CA, USA. FAU - Bandekar, Rajesh AU - Bandekar R AD - Janssen Research & Development, Spring House, PA, USA. FAU - de Boer, Carla J AU - de Boer CJ AD - Janssen Biologics, B.V., Leiden, The Netherlands. FAU - Yu, Margaret K AU - Yu MK AD - Janssen Research & Development, Los Angeles, CA, USA. FAU - Rathkopf, Dana E AU - Rathkopf DE AD - Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York, NY, USA. LA - eng SI - ClinicalTrials.gov/NCT01171898 GR - P30 CA008748/CA/NCI NIH HHS/United States PT - Clinical Trial, Phase II PT - Journal Article PT - Multicenter Study DEP - 20160506 PL - Switzerland TA - Eur Urol JT - European urology JID - 7512719 RN - 0 (Androgen Receptor Antagonists) RN - 0 (Thiohydantoins) RN - 0 (apalutamide) RN - EC 3.4.21.- (KLK3 protein, human) RN - EC 3.4.21.- (Kallikreins) RN - EC 3.4.21.77 (Prostate-Specific Antigen) SB - IM CIN - Eur Urol. 2016 Dec;70(6):971-973. PMID: 27238654 MH - Aged MH - Aged, 80 and over MH - Androgen Receptor Antagonists/*therapeutic use MH - Disease-Free Survival MH - Humans MH - Kallikreins/blood MH - Male MH - Middle Aged MH - Neoplasm Grading MH - Prostate-Specific Antigen/blood MH - Prostatic Neoplasms, Castration-Resistant/blood/*drug therapy/pathology MH - Thiohydantoins/*therapeutic use MH - Treatment Outcome PMC - PMC5568792 MID - NIHMS895646 OTO - NOTNLM OT - Antitumor activity OT - Apalutamide OT - Castration-resistant prostate cancer OT - Safety COIS- Financial disclosures: Matthew R. Smith certifies that all conflicts of interest, including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript (eg, employment/affiliation, grants or funding, consultancies, honoraria, stock ownership or options, expert testimony, royalties, or patents filed, received, or pending), are the following: Matthew R. Smith has served as a consultant to Janssen Research & Development. Emmanuel S. Antonarakis has served as a consultant/adviser to Janssen Biotech, Astellas, Medivation, ESSA, Sanofi, and Dendreon; he has received research funding from Aragon Pharmaceuticals, Johnson & Johnson, Janssen Biotech, Astellas, Tokai, Sanofi, Dendreon, Exelixis, Novartis, and Genentech. Charles J. Ryan has received honoraria from Janssen Research & Development. William R. Berry has received research grants from AHRQ. Neal D. Shore is a consultant/adviser to Algeta, Amgen, Bayer, BNI, Dendreon, Ferring, Janssen, Millennium, and Sanofi. Glenn Liu has nothing to report. Joshi J. Alumkal has received research funding from Aragon Pharmaceuticals. Celestia S. Higano received consulting fees or honoraria from AbbVie, Algeta, Astellas, Bayer, Dendreon, Genentech, Johnson & Johnson, Medivation, Novartis, Pfizer, and Veridex; grants or research support from Amgen, Aragon Pharmaceuticals, AstraZeneca, Bayer, Dendreon, Exelixis, Genentech, Johnson & Johnson, Medivation, Millennium, Novartis, OncoGenex, Sanofi-Aventis US, Taxynergy, and Teva; and other financial benefits from Cell Therapeutics. Edna Chow Maneval was an employee at Aragon Pharmaceuticals. Rajesh Bandekar is an employee of Janssen Research & Development and holds stock and stock options in Johnson & Johnson. Carla J. de Boer is an employee of Janssen Biologics and holds stock and stock options in Johnson & Johnson. Margaret K. Yu is an employee of Janssen Research & Development and holds stock and stock options in Johnson & Johnson. Dana E. Rathkopf has served as a consultant/adviser to and has received research funding from Janssen Research & Development, AstraZeneca, Celgene, Ferring, Medivation, Millennium/ Takeda, and Novartis. EDAT- 2016/05/11 06:00 MHDA- 2017/12/27 06:00 PMCR- 2017/08/23 CRDT- 2016/05/11 06:00 PHST- 2016/02/10 00:00 [received] PHST- 2016/04/21 00:00 [accepted] PHST- 2016/05/11 06:00 [pubmed] PHST- 2017/12/27 06:00 [medline] PHST- 2016/05/11 06:00 [entrez] PHST- 2017/08/23 00:00 [pmc-release] AID - S0302-2838(16)30133-6 [pii] AID - 10.1016/j.eururo.2016.04.023 [doi] PST - ppublish SO - Eur Urol. 2016 Dec;70(6):963-970. doi: 10.1016/j.eururo.2016.04.023. Epub 2016 May 6.