Reference : Everolimus Plus Exemestane vs Everolimus or Capecitabine Monotherapy for Estrogen Rec...
Scientific journals : Article
Human health sciences : Oncology
http://hdl.handle.net/2268/224448
Everolimus Plus Exemestane vs Everolimus or Capecitabine Monotherapy for Estrogen Receptor-Positive, HER2-Negative Advanced Breast Cancer: The BOLERO-6 Randomized Clinical Trial.
English
Jerusalem, Guy mailto [Université de Liège - ULiège > Département des sciences cliniques > Oncologie >]
de Boer, Richard H. [> >]
Hurvitz, Sara [> >]
Yardley, Denise A. [> >]
Kovalenko, Elena [> >]
Ejlertsen, Bent [> >]
Blau, Sibel [> >]
Ozguroglu, Mustafa [> >]
Landherr, Laszlo [> >]
Ewertz, Marianne [> >]
Taran, Tetiana [> >]
Fan, Jenna [> >]
Noel-Baron, Florence [> >]
Louveau, Anne-Laure [> >]
Burris, Howard [> >]
2018
JAMA Oncology
e182262
Yes (verified by ORBi)
International
2374-2437
2374-2445
United States
[en] Importance: Everolimus plus exemestane and capecitabine are approved second-line therapies for advanced breast cancer. Objective: A postapproval commitment to health authorities to estimate the clinical benefit of everolimus plus exemestane vs everolimus or capecitabine monotherapy for estrogen receptor-positive, human epidermal growth factor receptor 2-negative advanced breast cancer. Design: Open-label, randomized, phase 2 trial of treatment effects in postmenopausal women with advanced breast cancer that had progressed during treatment with nonsteroidal aromatase inhibitors. Interventions: Patients were randomized to 3 treatment regimens: (1) everolimus (10 mg/d) plus exemestane (25 mg/d); (2) everolimus alone (10 mg/d); and (3) capecitabine alone (1250 mg/m2 twice daily). Main Outcomes and Measures: Estimated hazard ratios (HRs) of progression-free survival (PFS) for everolimus plus exemestane vs everolimus alone (primary objective) or capecitabine alone (key secondary objective). Safety was a secondary objective. No formal statistical comparisons were planned. Results: A total of 309 postmenopausal women were enrolled, median age, 61 years (range, 32-88 years). Of these, 104 received everolimus plus exemestane; 103, everolimus alone; and 102, capecitabine alone. Median follow-up from randomization to the analysis cutoff (June 1, 2017) was 37.6 months. Estimated HR of PFS was 0.74 (90% CI, 0.57-0.97) for the primary objective of everolimus plus exemestane vs everolimus alone and 1.26 (90% CI, 0.96-1.66) for everolimus plus exemestane vs capecitabine alone. Between treatment arms, potential informative censoring was noted, and a stratified multivariate Cox regression model was used to account for imbalances in baseline characteristics; a consistent HR was observed for everolimus plus exemestane vs everolimus (0.73; 90% CI, 0.56-0.97), but the HR was closer to 1 for everolimus plus exemestane vs capecitabine (1.15; 90% CI, 0.86-1.52). Grade 3 to 4 adverse events were more frequent with capecitabine (74%; n = 75) vs everolimus plus exemestane (70%; n = 73) or everolimus alone (59%; n = 61). Serious adverse events were more frequent with everolimus plus exemestane (36%; n = 37) vs everolimus alone (29%; n = 30) or capecitabine (29%; n = 30). Conclusions and Relevance: These findings suggest that everolimus plus exemestane combination therapy offers a PFS benefit vs everolimus alone, and they support continued use of this therapy in this setting. A numerical PFS difference with capecitabine vs everolimus plus exemestane should be interpreted cautiously owing to imbalances among baseline characteristics and potential informative censoring. Trial Registration: ClinicalTrials.gov identifier: NCT01783444.
http://hdl.handle.net/2268/224448
10.1001/jamaoncol.2018.2262

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