1. Efficacy of subsequent chemotherapy for patients with BRCA1/2-mutated recurrent epithelial ovarian cancer progressing on olaparib versus placebo maintenance: post-hoc analyses of the SOLO2/ENGOT Ov-21 trial.
- Author
-
Frenel JS, Kim JW, Aryal N, Asher R, Berton D, Vidal L, Pautier P, Ledermann JA, Penson RT, Oza AM, Korach J, Huzarski T, Pignata S, Colombo N, Park-Simon TW, Tamura K, Sonke GS, Freimund AE, Lee CK, and Pujade-Lauraine E
- Subjects
- Adenosine Diphosphate therapeutic use, BRCA1 Protein genetics, BRCA2 Protein genetics, Carcinoma, Ovarian Epithelial drug therapy, Carcinoma, Ovarian Epithelial genetics, Disease Progression, Female, Humans, Maintenance Chemotherapy, Neoplasm Recurrence, Local drug therapy, Neoplasm Recurrence, Local genetics, Phthalazines, Piperazines, Poly(ADP-ribose) Polymerase Inhibitors therapeutic use, Ribose therapeutic use, Antineoplastic Agents therapeutic use, Ovarian Neoplasms drug therapy, Ovarian Neoplasms genetics
- Abstract
Background: In the SOLO2 trial (ENGOT Ov-21; NCT01874353), maintenance olaparib in patients with platinum-sensitive relapsed ovarian cancer (PSROC) and BRCA mutation significantly improved progression-free survival (PFS) and prolonged overall survival (OS). Following disease progression on olaparib, efficacy of subsequent chemotherapy remains unknown., Patients and Methods: We conducted a post-hoc hypothesis-generating analysis of SOLO2 data to determine the efficacy of different chemotherapy regimens following RECIST disease progression in patients who received olaparib or placebo. We evaluated time to second progression (TTSP) calculated from the date of RECIST progression to the next progression/death., Results: The study population comprised 147 patients who received chemotherapy as their first subsequent treatment after RECIST progression. Of these, 69 (47%) and 78 (53%) were originally randomized to placebo and olaparib arms, respectively. In the placebo-treated cohort, 27/69 and 42/69 received non-platinum and platinum-based chemotherapy, respectively, compared with 24/78 and 54/78, respectively, in the olaparib-treated cohort. Among patients treated with chemotherapy (N = 147), TTSP was significantly longer in the placebo than in the olaparib arm: 12.1 versus 6.9 months [hazard ratio (HR) 2.17, 95% confidence interval (CI) 1.47-3.19]. Similar result was obtained on multivariable analysis adjusting for prognostic factors at RECIST progression (HR 2.13, 95% CI 1.41-3.22). Among patients treated with platinum-based chemotherapy (n = 96), TTSP was significantly longer in the placebo arm: 14.3 versus 7.0 months (HR 2.89, 95% CI 1.73-4.82). Conversely, among patients treated with non-platinum-based chemotherapy (n = 51), the TTSP was comparable in the placebo and olaparib arms: 8.3 versus 6.0 months (HR 1.58, 95% CI 0.86-2.90)., Conclusions: Following progression from maintenance olaparib in the recurrent setting, the efficacy of platinum-based subsequent chemotherapy seems to be reduced in BRCA1/2-mutated patients with PSROC compared to patients not previously receiving poly (ADP-ribose) polymerase inhibitors (PARPi). The optimal strategy for patients who relapse after PARPi is an area of ongoing research., Competing Interests: Disclosure JSF reports personal fees from Roche Genentech, personal fees and non-financial support from Seattle Genetics, Novartis, Pfizer, Lilly, Novartis, GSK, Clovis oncology, AstraZeneca, Daiichi Sankyo, Gilead, MSD, Pierre Fabre, and Amgen, outside the submitted work. PP reports non-financial support from GSK, AstraZeneca, Clovis Oncology outside the submitted work. JAL reports personal fees from Pfizer, AstraZeneca, GSK, MSD, Clovis Oncology, Eisai, Bristol Myers Squibb, Artios Pharma, VBL Therapeutics, Neopharm, outside the submitted work. RTP reports personal fees from AbbVie, AstraZeneca, Eisai, Genentech / Roche, GSK Inc., Merck & Co, Sutro Biopharma, Vascular Biogenics Ltd, outside the submitted work. SP reports personal fees from, AstraZeneca, MSD; ROCHE, Clovis, GSK, Pfizer, PharmaMar, outside the submitted work. NC reports personal fees from AstraZeneca, Esai, Genentech, GSK, Merck, Pfizer, Regeneron pharmaceutical, outside the submitted work. TWPS reports personal fee from AstraZeneca, Tesaro, GSK, outside the submitted work. GSS has received grant from Agendia, AstraZeneca, Merck, Novartis, Roche, Seagen, outside the submitted work. CKL reports personal fee from AstraZeneca, Amgen, Takeda, Boehringer Ingelheim, Pfizer, Yuhan, Merck KGA, Roche, MSD, outside the submitted work. EPL reports grants and personal fees from AstraZeneca, Merck, GSK, Roche, Incyte, ARCAGY Research, outside the submitted work. All other authors have declared no conflicts of interest., (Copyright © 2022. Published by Elsevier Ltd.)
- Published
- 2022
- Full Text
- View/download PDF