Association of location of BRCA1 and BRCA2 mutations with benefit from olaparib and bevacizumab maintenance in high-grade ovarian cancer : phase III PAOLA-1/ENGOT-ov25 trial subgroup exploratory analysis

Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved..

BACKGROUND: In the phase III PAOLA-1 study, the addition of maintenance olaparib to bevacizumab in patients with newly diagnosed high-grade ovarian cancer (HGOC) resulted in prolonged progression-free survival (PFS), particularly for homologous recombination deficiency-positive tumors, including those with a BRCA mutation (BRCAm). The magnitude of benefit from olaparib and bevacizumab according to the location of mutation in BRCA1/BRCA2 remains to be explored.

PATIENTS AND METHODS: Patients with advanced-stage HGOC responding after platinum-based chemotherapy + bevacizumab received maintenance therapy bevacizumab (15 mg/kg q3w for 15 months) + either olaparib (300 mg b.i.d. for 24 months) or placebo. PFS was analyzed in the subgroup of patients with BRCA1m/BRCA2m according to mutation location in the functional domains of BRCA1 [Really Interesting Gene (RING), DNA-binding domain (DBD), or C-terminal domain of BRCA1 (BRCT)] and BRCA2 [RAD51-binding domain (RAD51-BD); DBD].

RESULTS: From 806 randomized patients, 159 harbored BRCA1m (19.7%) and 74 BRCA2m (9.2%). BRCA1m in RING, DBD, and BRCT domains was detected in 18, 40, and 33 patients, and BRCA2m in RAD51-BD and DBD in 36 and 13 patients, respectively. After a median follow-up of 25.5 months, benefit from maintenance olaparib + bevacizumab was observed irrespective of location of BRCAm. The benefit was particularly high for those with BRCA1m located in the DBD, with 24-month PFS estimated to be 89% and 15% [olaparib + bevacizumab versus placebo + bevacizumab hazard ratio = 0.08 (95% confidence interval 0.02-0.28); interaction P = 0.03]. In BRCA2m patients, 24-month PFS rates for those with mutations located in the DBD were 90% and 100% (olaparib + bevacizumab versus placebo + bevacizumab), respectively.

CONCLUSIONS: Advanced-stage BRCA-mutated HGOC patients reported PFS benefit from maintenance olaparib and bevacizumab regardless of mutation location. The benefit is particularly high for patients with mutations located in the DBD of BRCA1. Mutations located in the DBD of BRCA2 are also associated with excellent outcome.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:34

Enthalten in:

Annals of oncology : official journal of the European Society for Medical Oncology - 34(2023), 2 vom: 16. Feb., Seite 152-162

Sprache:

Englisch

Beteiligte Personen:

Labidi-Galy, S I [VerfasserIn]
Rodrigues, M [VerfasserIn]
Sandoval, J L [VerfasserIn]
Kurtz, J E [VerfasserIn]
Heitz, F [VerfasserIn]
Mosconi, A M [VerfasserIn]
Romero, I [VerfasserIn]
Denison, U [VerfasserIn]
Nagao, S [VerfasserIn]
Vergote, I [VerfasserIn]
Parma, G [VerfasserIn]
Nøttrup, T J [VerfasserIn]
Rouleau, E [VerfasserIn]
Garnier, G [VerfasserIn]
El-Balat, A [VerfasserIn]
Zamagni, C [VerfasserIn]
Martín-Lorente, C [VerfasserIn]
Pujade-Lauraine, E [VerfasserIn]
Fiévet, A [VerfasserIn]
Ray-Coquard, I L [VerfasserIn]

Links:

Volltext

Themen:

2S9ZZM9Q9V
Antineoplastic Agents
BRCA mutation
BRCA1 Protein
BRCA1 protein, human
BRCA2 Protein
BRCA2 protein, human
Bevacizumab
Genotype
Journal Article
Location of mutation
Olaparib
Ovarian cancer
PARP inhibitor
Phthalazines
Research Support, Non-U.S. Gov't
Type of mutation
WOH1JD9AR8

Anmerkungen:

Date Completed 07.02.2023

Date Revised 10.02.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.annonc.2022.11.003

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM350757925