Antitumor activity and safety profile of weekly carboplatin plus paclitaxel in metastatic breast cancer: a ten-year, monocentric, retrospective study

Claudio Vernieri, Monica Milano, Alessia Mennitto, Claudia Maggi, Benvenuto Ferrari, Lucia Rinaldi, Roberta Mennitto, Claudia Stefanetti, Barbara Re, Gabriella Mariani, Giulia Bianchi, Giuseppe Capri, Filippo de Braud

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Taxanes are a mainstay in the treatment of metastatic breast cancer (mBC). Combination chemotherapy, including platinum–taxens doublets, can improve tumor responses and progression-free survival (PFS), but is associated with more toxicities and an uncertain benefit in terms of overall survival (OS). Methods: We performed a retrospective study on 274 consecutive patients with mBC treated at the Division of Medical Oncology of Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy, during the decade 2007–2016 with the combination of carboplatin AUC 2 plus paclitaxel 80 mg/m2, both given on days 1 and 8 in every 21-day cycle. Results: 264 patients were evaluable for treatment safety and activity. The objective response rate (ORR) was 44.7%. Median PFS and OS were 8.6 and 23.7 months, respectively. Triple-negative breast cancer (TNBC) patients had significantly lower PFS and OS times compared to other biology groups. At multivariable analysis, previous exposure to taxanes, HR-positive HER2-negative biology, a higher number of metastatic sites, and de novo metastatic disease at diagnosis were associated with reduced PFS, while receiving maintenance therapy correlated with improved PFS. Overall, the treatment was quite well tolerated, with 10.2% of patients discontinuing one or both drugs because of adverse events (AEs). G3–G4 neutropenia occurred in 16.8% of patients, while the incidence of febrile neutropenia was 2.3%. Conclusions: Weekly carboplatin–paclitaxel regimen is active and well tolerated in mBC treatment. Prospective studies should be conducted to compare its efficacy and tolerability with standard single-agent paclitaxel or docetaxel treatment schedules, as well as with more recent combination regimens.

Original languageEnglish
Pages (from-to)365-373
Number of pages9
JournalBreast Cancer Research and Treatment
Volume165
Issue number2
DOIs
Publication statusPublished - Sep 1 2017

Keywords

  • Combination chemotherapy
  • HER2-positive breast cancer
  • Hormone receptor-positive breast cancer
  • Metastatic breast cancer
  • Triple-negative breast cancer
  • Weekly carboplatin–paclitaxel

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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