Dose intensity and efficacy of the combination of everolimus and exemestane (EVE/EXE) in a real-world population of hormone receptor-positive (ER+/PgR+), HER2-negative advanced breast cancer (ABC) patients: a multicenter Italian experience

M. Ciccarese, A. Fabi, L. Moscetti, M. E. Cazzaniga, L. Petrucelli, R. Forcignano, L. I. Lupo, E. De Matteis, V. E. Chiuri, G. Cairo, A. Febbraro, G. Giordano, M. Giampaglia, D. Bilancia, N. La Verde, E. Maiello, M. Morritti, F. Giotta, V. Lorusso, A. LatorreC. Scavelli, S. Romito, A. Cusmai, G. Palmiotti, G. Surico

Research output: Contribution to journalArticle

Abstract

AIM: This retrospective analysis focused on the effect of treatment with EVE/EXE in a real-world population outside of clinical trials. We examined the efficacy of this combination in terms of PFS and RR related to dose intensity (5 mg daily versus 10 mg daily) and tolerability. METHODS: 163 HER2-negative ER+/PgR+ ABC patients, treated with EVE/EXE from May 2011 to March 2016, were included in the analysis. The primary endpoints were the correlation between the daily dose and RR and PFS, as well as an evaluation of the tolerability of the combination. Secondary endpoints were RR, PFS, and OS according to the line of treatment. Patients were classified into three different groups, each with a different dose intensity of everolimus (A, B, C). RESULTS: RR was 29.8% (A), 27.8% (B) (p = 0.953), and not evaluable (C). PFS was 9 months (95% CI 7-11) (A), 10 months (95% CI 9-11) (B), and 5 months (95% CI 2-8) (C), p = 0.956. OS was 38 months (95% CI 24-38) (A), median not reached (B), and 13 months (95% CI 10-25) (C), p = 0.002. Adverse events were stomatitis 57.7% (11.0% grade 3-4), asthenia 46.0% (6.1% grade 3-4), hypercholesterolemia 46.0% (0.6% grade 3-4), and hyperglycemia 35.6% (5.5% grade 3-4). The main reason for discontinuation/interruption was grade 2-3 stomatitis. CONCLUSIONS: No correlation was found between dose intensity (5 vs. 10 mg labeled dose) and efficacy in terms of RR and PFS. The tolerability of the higher dose was poor in our experience, although this had no impact on efficacy.
Original languageEnglish
Pages (from-to)587-594
Number of pages8
JournalBreast Cancer Research and Treatment
Volume163
Issue number3
DOIs
Publication statusPublished - Jun 1 2017

Keywords

  • Breast cancer
  • Dose intensity
  • Everolimus
  • Real-world population
  • Side effects

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    Ciccarese, M., Fabi, A., Moscetti, L., Cazzaniga, M. E., Petrucelli, L., Forcignano, R., Lupo, L. I., Matteis, E. D., Chiuri, V. E., Cairo, G., Febbraro, A., Giordano, G., Giampaglia, M., Bilancia, D., Verde, N. L., Maiello, E., Morritti, M., Giotta, F., Lorusso, V., ... Surico, G. (2017). Dose intensity and efficacy of the combination of everolimus and exemestane (EVE/EXE) in a real-world population of hormone receptor-positive (ER+/PgR+), HER2-negative advanced breast cancer (ABC) patients: a multicenter Italian experience. Breast Cancer Research and Treatment, 163(3), 587-594. https://doi.org/10.1007/s10549-017-4213-9 [doi]