Portal de Periódicos da CAPES

Rucaparib in Men With Metastatic Castration-Resistant Prostate Cancer Harboring a BRCA1 or BRCA2 Gene Alteration

2020; Lippincott Williams & Wilkins; Volume: 38; Issue: 32 Linguagem: Inglês

10.1200/jco.20.01035

1527-7755

Wassim Abida, Akash Patnaik, David Campbell, Jeremy Shapiro, Alan H. Bryce, Ray McDermott, Brieuc Sautois, Nicholas J. Vogelzang, Richard Bambury, Éric Voog, Jingsong Zhang, Josep M. Piulats, Charles J. Ryan, Axel S. Merseburger, Gedske Daugaard, Axel Heidenreich, Karim Fizazi, Celestia S. Higano, Laurence E. Krieger, Cora N. Sternberg, Simon P. Watkins, Darrin Despain, Andrew D. Simmons, Andrea Loehr, Melanie Dowson, Tony Golsorkhi, Simon Chowdhury,

Protein Degradation and Inhibitors

BRCA1 or BRCA2 (BRCA) alterations are common in men with metastatic castration-resistant prostate cancer (mCRPC) and may confer sensitivity to poly(ADP-ribose) polymerase inhibitors. We present results from patients with mCRPC associated with a BRCA alteration treated with rucaparib 600 mg twice daily in the phase II TRITON2 study.We enrolled patients who progressed after one to two lines of next-generation androgen receptor-directed therapy and one taxane-based chemotherapy for mCRPC. Efficacy and safety populations included patients with a deleterious BRCA alteration who received ≥ 1 dose of rucaparib. Key efficacy end points were objective response rate (ORR; per RECIST/Prostate Cancer Clinical Trials Working Group 3 in patients with measurable disease as assessed by blinded, independent radiology review and by investigators) and locally assessed prostate-specific antigen (PSA) response (≥ 50% decrease from baseline) rate.Efficacy and safety populations included 115 patients with a BRCA alteration with or without measurable disease. Confirmed ORRs per independent radiology review and investigator assessment were 43.5% (95% CI, 31.0% to 56.7%; 27 of 62 patients) and 50.8% (95% CI, 38.1% to 63.4%; 33 of 65 patients), respectively. The confirmed PSA response rate was 54.8% (95% CI, 45.2% to 64.1%; 63 of 115 patients). ORRs were similar for patients with a germline or somatic BRCA alteration and for patients with a BRCA1 or BRCA2 alteration, while a higher PSA response rate was observed in patients with a BRCA2 alteration. The most frequent grade ≥ 3 treatment-emergent adverse event was anemia (25.2%; 29 of 115 patients).Rucaparib has antitumor activity in patients with mCRPC and a deleterious BRCA alteration, but with a manageable safety profile consistent with that reported in other solid tumor types.