Olaparib treatment significantly improved objective response rate (primary end point) and progression-free survival versus nonplatinum chemotherapy in patients with BRCA-mutated platinum-sensitive relapsed ovarian cancer in the open-label phase III SOLO3 trial (ClinicalTrials.gov identifier: NCT02282020). We report final overall survival (OS; prespecified secondary end point), post hoc OS analysis by number of previous chemotherapy lines, and exploratory BRCA reversion mutation analysis. Two hundred sixty-six patients were randomly assigned 2:1 to olaparib tablets (300 mg twice daily; n = 178) or physician's choice of single-agent nonplatinum chemotherapy (pegylated liposomal doxorubicin, paclitaxel, gemcitabine, or topotecan; n = 88). OS was similar with olaparib versus chemotherapy (hazard ratio [HR], 1.07 [95% CI, 0.76 to 1.49]; P = .71, median 34.9 and 32.9 months, respectively, full analysis set). OS with olaparib was favorable in patients with two previous chemotherapy lines (HR, 0.83 [olaparib v chemotherapy] [95% CI, 0.51 to 1.38]; median 37.9 v 28.8 months); however, a potential detrimental effect was seen in patients with at least three previous chemotherapy lines (HR, 1.33 [95% CI, 0.84 to 2.18]; median 29.9 v 39.4 months). BRCA reversion mutations might have contributed to this finding. No patient randomly assigned to olaparib with a BRCA reversion mutation detected at baseline (6 of 170 [3.5%]) achieved an objective tumor response.

• MeSH
• Deoxycytidine analogs & derivatives   administration & dosage   MeSH
• Progression-Free Survival MeSH
• Adult MeSH
• Doxorubicin analogs & derivatives   administration & dosage   MeSH
• Phthalazines * therapeutic use   adverse effects   administration & dosage   MeSH
• Gemcitabine MeSH
• Middle Aged MeSH
• Humans MeSH
• Neoplasm Recurrence, Local * drug therapy   MeSH
• Ovarian Neoplasms * drug therapy   genetics   mortality   pathology   MeSH
• Paclitaxel administration & dosage   MeSH
• Poly(ADP-ribose) Polymerase Inhibitors * therapeutic use   adverse effects   MeSH
• Piperazines * therapeutic use   adverse effects   administration & dosage   MeSH
• Polyethylene Glycols administration & dosage   MeSH
• BRCA1 Protein genetics   MeSH
• BRCA2 Protein genetics   MeSH
• Antineoplastic Combined Chemotherapy Protocols * therapeutic use   adverse effects   MeSH
• Aged MeSH
• Topotecan administration & dosage   MeSH
• Check Tag
• Adult MeSH
• Middle Aged MeSH
• Humans MeSH
• Aged MeSH
• Female MeSH
• Publication type
• Journal Article MeSH
• Clinical Trial, Phase III MeSH
• Multicenter Study MeSH
• Randomized Controlled Trial MeSH
• Names of Substances
• BRCA1 protein, human MeSH Browser
• BRCA2 protein, human MeSH Browser
• Deoxycytidine MeSH
• Doxorubicin MeSH
• Phthalazines * MeSH
• Gemcitabine MeSH
• liposomal doxorubicin MeSH Browser
• olaparib MeSH Browser
• Paclitaxel MeSH
• Poly(ADP-ribose) Polymerase Inhibitors * MeSH
• Piperazines * MeSH
• Polyethylene Glycols MeSH
• BRCA1 Protein MeSH
• BRCA2 Protein MeSH
• Topotecan MeSH

PURPOSE: ATHENA (ClinicalTrials.gov identifier: NCT03522246) was designed to evaluate rucaparib first-line maintenance treatment in a broad patient population, including those without BRCA1 or BRCA2 (BRCA) mutations or other evidence of homologous recombination deficiency (HRD), or high-risk clinical characteristics such as residual disease. We report the results from the ATHENA-MONO comparison of rucaparib versus placebo. METHODS: Patients with stage III-IV high-grade ovarian cancer undergoing surgical cytoreduction (R0/complete resection permitted) and responding to first-line platinum-doublet chemotherapy were randomly assigned 4:1 to oral rucaparib 600 mg twice a day or placebo. Stratification factors were HRD test status, residual disease after chemotherapy, and timing of surgery. The primary end point of investigator-assessed progression-free survival was assessed in a step-down procedure, first in the HRD population (BRCA-mutant or BRCA wild-type/loss of heterozygosity high tumor), and then in the intent-to-treat population. RESULTS: As of March 23, 2022 (data cutoff), 427 and 111 patients were randomly assigned to rucaparib or placebo, respectively (HRD population: 185 v 49). Median progression-free survival (95% CI) was 28.7 months (23.0 to not reached) with rucaparib versus 11.3 months (9.1 to 22.1) with placebo in the HRD population (log-rank P = .0004; hazard ratio [HR], 0.47; 95% CI, 0.31 to 0.72); 20.2 months (15.2 to 24.7) versus 9.2 months (8.3 to 12.2) in the intent-to-treat population (log-rank P < .0001; HR, 0.52; 95% CI, 0.40 to 0.68); and 12.1 months (11.1 to 17.7) versus 9.1 months (4.0 to 12.2) in the HRD-negative population (HR, 0.65; 95% CI, 0.45 to 0.95). The most common grade ≥ 3 treatment-emergent adverse events were anemia (rucaparib, 28.7% v placebo, 0%) and neutropenia (14.6% v 0.9%). CONCLUSION: Rucaparib monotherapy is effective as first-line maintenance, conferring significant benefit versus placebo in patients with advanced ovarian cancer with and without HRD.

• MeSH
• Carcinoma, Ovarian Epithelial drug therapy   genetics   MeSH
• Indoles adverse effects   MeSH
• Humans MeSH
• Ovarian Neoplasms * drug therapy   genetics   surgery   MeSH
• Poly(ADP-ribose) Polymerase Inhibitors * adverse effects   MeSH
• Maintenance Chemotherapy MeSH
• Check Tag
• Humans MeSH
• Female MeSH
• Publication type
• Journal Article MeSH
• Clinical Trial, Phase III MeSH
• Research Support, Non-U.S. Gov't MeSH
• Randomized Controlled Trial MeSH
• Names of Substances
• Indoles MeSH
• Poly(ADP-ribose) Polymerase Inhibitors * MeSH
• rucaparib MeSH Browser