Neoadjuvant chemotherapy in triple-negative breast cancer: A multicentric retrospective observational study in real-life setting

Teresa Gamucci, Laura Pizzuti, Isabella Sperduti, Lucia Mentuccia, Angela Vaccaro, Luca Moscetti, Paolo Marchetti, Luisa Carbognin, Andrea Michelotti, Laura Iezzi, Alessandra Cassano, Antonino Grassadonia, Antonio Astone, Andrea Botticelli, Emanuela Magnolfi, Luigi Di Lauro, Domenico Sergi, Paola Fuso, Nicola Tinari, Maddalena BarbaMarcello Maugeri-Saccà, Elisabetta Landucci, Francesca Conti, Giuseppe Sanguineti, Michele De Tursi, Gianni Iafrate, Antonio Giordano, Gennaro Ciliberto, Clara Natoli, Patrizia Vici

Research output: Contribution to journalArticle

Abstract

We aimed to assess the efficacy of neoadjuvant chemotherapy (NACT) in a cohort of 213 triple-negative breast cancer (TNBC) patients treated in real-world practice at eight Italian cancer centers. We computed descriptive statistics for all the variable of interest. Factors testing significant in univariate analysis were included in multivariate models. Survival data were compared by Kaplan–Meier curves and log-rank test. The median follow-up was 45 months. We observed 60 (28.2%) pathological complete response (pCR). The sequential anthracyclines-taxanes-based regimens produced the highest rate of pCR (42.6%), followed by concomitant anthracycline-taxane (24.2%), and other regimens (15.6%) (p = 0.008). When analyzing the role of baseline Ki-67, a 50% cut-off was the optimal threshold value for pCR prediction (p = 0.0005). The 5-year disease-free survival (DFS) was 57.3% and the 5-year overall survival (OS) was 70.8%. In patients not achieving pCR, the optimal Ki-67 variation between biopsy and surgical specimen with prognostic relevance on long-term outcomes was 13% (p = 0.04). Patients with a Ki-67 reduction (rKi-67)<13% had worse outcomes compared to those who experienced pCR or a rKi-67≥13%. The number of NACT cycles also affected long-term outcomes (5-year DFS 65.7% vs 51.6% in patients having received >6 cycles compared with their counterparts, p = 0.02). In multivariate analysis, node status, grading, and bio-pathological treatment response (including pCR and rKi-67) impacted DFS and OS. Our results confirmed the advantage conferred by more than 6 cycles of a sequential antracycline-taxane-based NACT. Higher baseline Ki-67 values shows greater predictive significance on pathogical response, while the rKi-67 plays a prognostic role on long-term outcomes.

Original languageEnglish
Pages (from-to)2313-2323
Number of pages11
JournalJournal of Cellular Physiology
Volume233
Issue number3
DOIs
Publication statusPublished - Mar 1 2018

Keywords

  • long-term outcomes
  • neoadjuvant chemotherapy
  • pathological complete response
  • rKi-67
  • triple-negative breast cancer

ASJC Scopus subject areas

  • Physiology
  • Clinical Biochemistry
  • Cell Biology

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