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Efficacy of palbociclib plus fulvestrant after everolimus in hormone receptor-positive metastatic breast cancer

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Abstract

Background

Palbociclib, a CDK4-6 inhibitor, combined with endocrine therapy (ET) is a new standard of treatment for Hormone Receptor-positive Metastatic Breast Cancer. We present the first real-life efficacy and tolerance data of palbociclib plus fulvestrant in this population.

Methods

From November 2015 to November 2016, patients receiving in our institution palbociclib + fulvestrant according to the Temporary Authorization for Use were prospectively analyzed.

Results

60 patients were treated accordingly; median age was 61 years; 50 patients (83.3%) had visceral metastasis, and 10 (16.7%) had bone-only disease. Patients had previously received a median of 5 (1–14) lines of treatment, including ET (median 3) and chemotherapy (median 2); 28 (46.7%) received previously fulvestrant and all everolimus. With a median follow-up of 10.3 months, median progression-free survival (mPFS) was 5.8 months (95% CI 3.9–7.3). Patients pretreated with fulvestrant had a similar PFS of 6.4 months (HR 1.00; 95% CI 0.55–1.83; P = 1.00). The most common AEs (adverse events) were neutropenia (93%), anemia (65%), and thrombocytopenia (55%).

Conclusion

In this heavily pretreated population including everolimus, fulvestrant plus palbociclib provides an mPFS of 5.8 months with the same magnitude of benefit for fulvestrant-pretreated patients.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Medical Oncology Department, Centre René Gauducheau, Institut de Cancérologie de l’Ouest (ICO), Saint-Herblain, France

    Pauline du Rusquec, Carole Gourmelon, Marie Robert, Mario Campone & Jean-Sébastien Frenel

  2. Biometrics Department, Centre René Gauducheau, Institut de Cancérologie de l’Ouest (ICO), Saint-Herblain, France

    Clément Palpacuer & Loic Campion

  3. Medical Oncology Department, Centre Paul Papin, (ICO), Saint-Herblain, France

    Anne Patsouris & Paule Augereau

  4. Pharmacy Department, Centre René Gauducheau, Institut de Cancérologie de l’Ouest (ICO), Saint-Herblain, France

    Laurence Dumas

  5. Pharmacy Department, Centre Paul Papin (ICO), Saint-Herblain, France

    Folliard Caroline

Authors
  1. Pauline du Rusquec
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  2. Clément Palpacuer
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  3. Loic Campion
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  4. Anne Patsouris
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  5. Paule Augereau
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  6. Carole Gourmelon
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  7. Marie Robert
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  8. Laurence Dumas
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  9. Folliard Caroline
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  10. Mario Campone
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  11. Jean-Sébastien Frenel
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Corresponding author

Correspondence to Pauline du Rusquec.

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Conflict of interest

JSF and MC report receiving consulting fees from Pfizer; PA received fees for serving on advisory boards from Pfizer; PDR, JSF, AP, and MC received travel support from Pfizer.

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du Rusquec, P., Palpacuer, C., Campion, L. et al. Efficacy of palbociclib plus fulvestrant after everolimus in hormone receptor-positive metastatic breast cancer. Breast Cancer Res Treat 168, 559–566 (2018). https://doi.org/10.1007/s10549-017-4623-8

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  • DOI: https://doi.org/10.1007/s10549-017-4623-8

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