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Safety Results and Analysis of Eribulin Efficacy according to Previous Microtubules-Inhibitors Sensitivity in the French Prospective Expanded Access Program for Heavily Pre-treated Metastatic Breast Cancer
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Renaud Sabatier, Véronique Diéras, Xavier Pivot, Etienne Brain, Henri Roché, Jean-Marc Extra, Audrey Monneur, Magali Provansal, Carole Tarpin, François Bertucci, Patrice Viens, Christophe Zemmour, Anthony Gonçalves
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Cancer Res Treat. 2018;50(4):1226-1237. Published online December 28, 2017
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DOI: https://doi.org/10.4143/crt.2017.446
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 Abstract
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- Purpose
Eribulin is approved for advanced breast cancers refractory to anthracyclines and taxanes. Efficacy according to sensitivity to previous therapies has been poorly explored.
Materials and Methods
Safety data were collected prospectively and we retrospectively collected efficacy data from the five French centres that participated in the Eribulin E7389-G000-398 expanded access program. Our main objectiveswere exploration of safety and analysis of eribulin efficacy (progression-free survival [PFS] and overall survival [OS]) according to sensitivity to the last microtubule-inhibiting agent administered.
Results
Median eribulin treatment duration was 3.3 months for the 250 patients included in this prospective single-arm study. Two hundreds and thirty-nine patients (95.6%) experienced an adverse event (AE) related to treatment including 129 (51.6%) with grade ≥ 3 AEs. The most frequently observed toxicities were cytopenias (59.6% of included patients), gastrointestinal disorders (59.2%), and asthenia (56.4%). The most frequent grade 3-4 AE was neutropenia (37.2% with 4.8% febrile neutropenia). Median PFS and OS were 4.6 and 11.8 months, respectively. Patients classified as responders to the last microtubule-inhibiting therapy had a longer OS (hazard ratio [HR], 0.69; 95% confidence interval [CI], 0.51 to 0.94; p=0.017), and tended to display a better PFS (HR, 0.78; 95% CI, 0.58 to 1.04; p=0.086). OS improvement was still significant in multivariate analysis (adjusted HR, 0.53; 95% CI, 0.35 to 0.79; p=0.002).
Conclusion
This work based on a prospective study suggests that identification of patients likely to be more sensitive to eribulin could be based on their previous response to microtubules inhibitors.
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Citations
Citations to this article as recorded by  - Emerging treatment approaches for triple-negative breast cancer
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Current Medical Research and Opinion.2020; 36(12): 2025. CrossRef - Real‐life activity of eribulin mesylate among metastatic breast cancer patients in the multicenter national observational ESME program
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