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Ref Type Journal Article
PMID (36795891)
Authors Fizazi K, Piulats JM, Reaume MN, Ostler P, McDermott R, Gingerich JR, Pintus E, Sridhar SS, Bambury RM, Emmenegger U, Lindberg H, Morris D, Nolè F, Staffurth J, Redfern C, Sáez MI, Abida W, Daugaard G, Heidenreich A, Krieger L, Sautois B, Loehr A, Despain D, Heyes CA, Watkins SP, Chowdhury S, Ryan CJ, Bryce AH, TRITON3 Investigators
Title Rucaparib or Physician's Choice in Metastatic Prostate Cancer.
URL
Abstract Text In a phase 2 study, rucaparib, an inhibitor of poly(ADP-ribose) polymerase (PARP), showed a high level of activity in patients who had metastatic, castration-resistant prostate cancer associated with a deleterious BRCA alteration. Data are needed to confirm and expand on the findings of the phase 2 study.In this randomized, controlled, phase 3 trial, we enrolled patients who had metastatic, castration-resistant prostate cancer with a BRCA1, BRCA2, or ATM alteration and who had disease progression after treatment with a second-generation androgen-receptor pathway inhibitor (ARPI). We randomly assigned the patients in a 2:1 ratio to receive oral rucaparib (600 mg twice daily) or a physician's choice control (docetaxel or a second-generation ARPI [abiraterone acetate or enzalutamide]). The primary outcome was the median duration of imaging-based progression-free survival according to independent review.Of the 4855 patients who had undergone prescreening or screening, 270 were assigned to receive rucaparib and 135 to receive a control medication (intention-to-treat population); in the two groups, 201 patients and 101 patients, respectively, had a BRCA alteration. At 62 months, the duration of imaging-based progression-free survival was significantly longer in the rucaparib group than in the control group, both in the BRCA subgroup (median, 11.2 months and 6.4 months, respectively; hazard ratio, 0.50; 95% confidence interval [CI], 0.36 to 0.69) and in the intention-to-treat group (median, 10.2 months and 6.4 months, respectively; hazard ratio, 0.61; 95% CI, 0.47 to 0.80; P<0.001 for both comparisons). In an exploratory analysis in the ATM subgroup, the median duration of imaging-based progression-free survival was 8.1 months in the rucaparib group and 6.8 months in the control group (hazard ratio, 0.95; 95% CI, 0.59 to 1.52). The most frequent adverse events with rucaparib were fatigue and nausea.The duration of imaging-based progression-free survival was significantly longer with rucaparib than with a control medication among patients who had metastatic, castration-resistant prostate cancer with a BRCA alteration. (Funded by Clovis Oncology; TRITON3 ClinicalTrials.gov number, NCT02975934.).

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ATM inact mut prostate cancer no benefit Rucaparib Phase III Actionable In a Phase III trial (TRITON3), Rubraca (rucaparib) treatment demonstrated limited efficacy compared to control treatment with Taxotere (docetaxel) in patients with metastatic castration-resistant prostate cancer harboring deleterious ATM mutations, with a median imaging-based progression-free survival of 8.1 months vs. 6.8 months (HR=0.95), a median overall survival of 21.1 months vs. 21.7 months of patients (PMID: 36795891; NCT02975934). 36795891