Olaparib plus bevacizumab first-line maintenance in ovarian cancer: final overall survival results from the PAOLA-1/ENGOT-ov25 trial.

BACKGROUND

In the PAOLA-1/ENGOT-ov25 primary analysis, maintenance olaparib plus bevacizumab demonstrated a significant progression-free survival (PFS) benefit in newly diagnosed advanced ovarian cancer patients in clinical response after first-line platinum-based chemotherapy plus bevacizumab, irrespective of surgical status. Prespecified, exploratory analyses by molecular biomarker status showed substantial benefit in patients with a BRCA1/BRCA2 mutation (BRCAm) or homologous recombination deficiency (HRD; BRCAm and/or genomic instability). We report the prespecified final overall survival (OS) analysis, including analyses by HRD status.

PATIENTS AND METHODS

Patients were randomized 2 : 1 to olaparib (300 mg twice daily; up to 24 months) plus bevacizumab (15 mg/kg every 3 weeks; 15 months total) or placebo plus bevacizumab. Analysis of OS, a key secondary endpoint in hierarchical testing, was planned for ∼60% maturity or 3 years after the primary analysis.

RESULTS

After median follow-up of 61.7 and 61.9 months in the olaparib and placebo arms, respectively, median OS was 56.5 versus 51.6 months in the intention-to-treat population [hazard ratio (HR) 0.92, 95% confidence interval (CI) 0.76-1.12; P = 0.4118]. Subsequent poly(ADP-ribose) polymerase inhibitor therapy was received by 105 (19.6%) olaparib patients versus 123 (45.7%) placebo patients. In the HRD-positive population, OS was longer with olaparib plus bevacizumab (HR 0.62, 95% CI 0.45-0.85; 5-year OS rate, 65.5% versus 48.4%); at 5 years, updated PFS also showed a higher proportion of olaparib plus bevacizumab patients without relapse (HR 0.41, 95% CI 0.32-0.54; 5-year PFS rate, 46.1% versus 19.2%). Myelodysplastic syndrome, acute myeloid leukemia, aplastic anemia, and new primary malignancy incidence remained low and balanced between arms.

CONCLUSIONS

Olaparib plus bevacizumab provided clinically meaningful OS improvement for first-line patients with HRD-positive ovarian cancer. These prespecified exploratory analyses demonstrated improvement despite a high proportion of patients in the placebo arm receiving poly(ADP-ribose) polymerase inhibitors after progression, confirming the combination as one of the standards of care in this setting with the potential to enhance cure.

Informations de copyright

Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.

Déclaration de conflit d'intérêts

Disclosure IRC reports honoraria (personal) from AbbVie, Agenus, Advaxis, Bristol Myers Squibb (BMS), PharmaMar, Genmab, Pfizer, AstraZeneca, Roche, GlaxoSmithKline (GSK), Merck Sharp & Dohme (MSD), Deciphera, Mersana, Merck Sereno, Novartis, Amgen, Tesaro, and Clovis; honoraria (institution) from GSK, MSD, Roche, and BMS; advisory/consulting fees from AbbVie, Agenus, Advaxis, BMS, PharmaMar, Genmab, Pfizer, AstraZeneca, Roche/Genentech, GSK, MSD, Deciphera, Mersana, Merck Sereno, Novartis, Amgen, Tesaro, and Clovis; research grant/funding (self) from MSD, Roche, and BMS; research grant/funding (institution) from MSD, Roche, BMS, Novartis, AstraZeneca, and Merck Sereno; and travel support from Roche, AstraZeneca, and GSK. AL reports grants from AstraZeneca and Sanofi; consulting fees from Seattle Genetics; honoraria/reimbursement and advisory board fees from AstraZeneca; advisory board fees or continuing medical education from Ability Pharma, Biocad, Clovis Oncology, GSK, Medscape, Merck Serono, MSD, TouchCongress, and Zentalis; support for attending meetings and/or travel from AstraZeneca, Clovis Oncology, GSK, and Roche; and participation on a data safety monitoring board or advisory board for ARIEL4 and TROPHIMMUNE. SP reports honoraria from AstraZeneca, Roche, MSD, Pfizer, Tesaro, Clovis Oncology, GSK, and PharmaMar; and research funding (institution) from Roche, MSD, AstraZeneca, and Pfizer. AGM reports advisory/consultancy fees (personal) from Alkermes, Amgen, AstraZeneca, Clovis Oncology, Eisai, Genmab, GSK, Hedera Dx, Illumina, ImmunoGen, MSD, Macrogenics, Mersana, Novartis, Oncoinvent, PharmaMar, Roche, Regeneron, Sotio, and Sutro; speaker bureau fees (personal) from AstraZeneca, Roche, GSK, MSD, Novocure, Takeda, Zai Lab, and Clovis; research grant/funding (institution) from Roche, Novartis, GSK, and Aravive; and steering committee member (personal) for MSD. CM reports honoraria/consulting fees (personal) from Roche, Novartis, Amgen, MSD, PharmaMar, AstraZeneca, GSK, and Seagen; participation on an advisory board from Roche, Novartis, Amgen, MSD, PharmaMar, AstraZeneca, GSK, and Seagen; and travel expenses from Roche and AstraZeneca. SN reports honoraria (self) from AstraZeneca, Chugai, Mochida, MSD, Takeda, and Terumo; and research grant (self) from AstraZeneca. IV reports consulting fees from Agenus, Akesobio, AstraZeneca, BMS, Deciphera Pharmaceuticals, Eisai, Elevar Therapeutics, F. Hoffmann-La Roche, Genmab, GSK, Immunogen, Jazzpharma, Karyopharm, Mersana, MSD, Novocure, Novartis, Oncoinvent, OncXerna, Sanofi, Seagen, Sotio, Verastem Oncology, and Zentalis; contracted research funding (via KULeuven) from Oncoinvent AS; corporate sponsored research funding from Amgen and Roche; and accommodation and travel expenses from Karyopharm. NC reports research grants from AstraZeneca, PharmaMar, and Roche; honoraria for lectures from AstraZeneca, Tesaro, Novartis, Clovis Oncology, MSD, GSK, and Eisai; honoraria for advisory boards from Roche, PharmaMar, AstraZeneca, Clovis Oncology, MSD, GSK, Tesaro, Pfizer, BIOCAD, ImmunoGen, Mersana Therapeutics, Eisai, and OncXerna Therapeutics; and is a steering committee member on ESMO clinical guidelines and a scientific committee chair for Acto Onlus. JM reports honoraria from AstraZeneca and GSK. FS reports honoraria from AstraZeneca, GSK Tesaro, MSD, Sandoz (Novartis), and Clovis Oncology; and institutional financial support from Roche, GSK Tesaro, AstraZeneca, Immunogen, MSD, Incyte, and Agenus. JS reports grants or contracts from Roche Pharma, AstraZeneca, Bayer, Clovis, GSK, Lilly, Tesaro, consulting fees from Tesaro, Merck, Pfizer, PharmaMar, Clovis Oncology, AstraZeneca, Roche Pharma, GSK, MSD, Eisai, Novocure, Oncoinvent, payment or honoraria for lectures, presentations, speakers bureaus, manuscript writing or educational events from Tesaro, GSK, PharmaMar, AstraZeneca, Clovis, Bayer, Roche, PharmaMar, Vifor Pharma, Hexal AG, Novartis Pharma. DL reports consultancy fees (personal) from AstraZeneca, Clovis Oncology, Genmab, GSK, Immunogen, MSD, PharmaMar, Novartis, and Seagen; membership on an advisory board (personal) from AstraZeneca, Clovis Oncology, Corcept, Genmab, GSK, Immunogen, MSD, Oncoinvest, PharmaMar, Seagen, and Sutro; research funding (institutional) from AstraZeneca, Clovis Oncology, Genmab, GSK, Immunogen, Incyte, MSD, Novartis, PharmaMar, Roche, and Seagen; and travel support from Roche, PharmaMar, AstraZeneca, Clovis Oncology, and GSK. EMGA reports consulting fees from AstraZeneca–MSD, Clovis Oncology, GSK–Tesaro, PharmaMar, and Roche; speaker bureau/expert testimony honorarium from AstraZeneca–MSD, PharmaMar, Roche, GSK–Tesaro, and Clovis Oncology; and travel support from Roche, GSK–Tesaro, and Baxter. GB reports consulting or advisory board roles for AstraZeneca, Roche, and GSK; and has received funding for medical conferences from AstraZeneca, Roche, and GSK. CLP reports advisory/consultancy honoraria from Pfizer, AstraZeneca, Roche, and Daiichi–Sanko; and other travel/accommodation/medical congress expenses from Roche, Novartis, Pfizer, Pierre Fabre, and MSD. PB reports honoraria from Roche, AstraZeneca, and GSK; and congress and travel support from GSK and PharmaMar. AL reports advisory board fees from AstraZeneca, MSD, and Tesaro; speaker honoraria from Clovis Oncology and Roche; and participation in a medical congress for Novartis, Pfizer, MSD, Lilly, and Roche. AB reports honoraria for lectures and advisory boards from AstraZeneca, Roche, and Tesaro. JM reports advisory board fees (personal) from Daiichi Sankyo, Gilead, and Eli Lilly; and non-financial traveling facilities from Pfizer. AEB reports advisory board fees from AstraZeneca, MSD, and GSK; speaker honoraria from AstraZeneca and Olympus; and participation in a medical congress for PharmaMar and AstraZeneca. MR reports advisory board fees (personal) from AstraZeneca, GSK, and Immunocore; advisory board fees and research grant (personal/institution) from MSD; and research grant (institution) from BMS. TWPS reports honoraria (advisory role, expert testimony and lectures, participation in clinical trials, other financial relationships, e.g. travel) from AstraZeneca, Daiichi-Sankyo, Exact Sciences, Gilead, GSK, Lilly, MSD, NCO, Novartis, Pfizer, Roche, and Seagen. CD reports participation on a data safety monitoring board or advisory board for MSD, Eisai, and AstraZeneca. DD reports consulting or advisory roles (personal) for AstraZeneca, GSK/Tesaro, Roche, Eisai Germany, and MSD Oncology; travel expenses from AstraZeneca; and honoraria from Roche, AstraZeneca, GSK/Tesaro, MSD, Intuitive Surgical, and KLS Martin. BY reports consulting fees (personal) from MSD, AstraZeneca, GSK–Tesaro, Bayer, Roche–Genentech, ECS Progastrin, Novartis, LEK, Amgen, Clovis Oncology, Merck Serono, BMS, SEAGEN, and Myriad. EPL reports lecture fees, speaker’s bureau fees, and travel support from AstraZeneca, Tesaro, and Roche; lecture fees from Clovis Oncology, Incyte, and Pfizer; and is employed by ARCAGY Research. PH reports honoraria from AstraZeneca, Roche, Clovis Oncology, Stryker, MSD Oncology, Zai Lab, Lilly, Sotio, Eisai, and GSK; consulting/advisory roles from AstraZeneca, Roche, Tesaro, Merck, GSK, Clovis Oncology, and Immunogen; and research funding (institution) from AstraZeneca, Roche, Genmab, GSK, Immunogen, and Clovis Oncology. All other authors have declared no conflicts of interest.