Trastuzumab or lapatinib with standard chemotherapy for HER2-positive breast cancer: Results from the GEICAM/2006-14 trial

E. Alba, J. Albanell, J. De La Haba, A. Barnadas, L. Calvo, P. Sánchez-Rovira, M. Ramos, F. Rojo, O. Burgués, E. Carrasco, R. Caballero, I. Porras, A. Tibau, M. C. Cámara, A. Lluch

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48 Citations (Scopus)

Abstract

Background:The addition of trastuzumab (T) and lapatinib (L) to neoadjuvant chemotherapy increases the pathological complete response (pCR) rate in patients with human epidermal growth factor receptor 2 (HER2)-positive early breast cancer. We investigated the efficacy of T or L with neoadjuvant chemotherapy and specific efficacy biomarkers.Methods:Patients with stages I-III (including inflammatory) HER2-positive breast cancer were randomised to receive epirubicin (E) plus cyclophosphamide (C) × 4 cycles followed by docetaxel (D) plus either T (EC-DT) or L (EC-DL). End points included pCR (primary), clinical response, toxicity, and pCR-predictive biomarkers.Results:We randomised 102 patients to EC-DT (50) and EC-DL (52). Median age was 48, 56% were premenopausal and 58% had oestrogen receptor (ER)-positive tumours. Pathological complete response in breast was 52.1% (95% CI:38.0-66.2%) for EC-DT and 25.5% (95% CI:13.5-37.5%) for EC-DL (P=0.0065). Pathological complete response in breast and axilla was 47.9% for EC-DT and 23.5% for EC-DL (P=0.011). Grade 3-4 toxicity did not differ across treatments, except for diarrhoea (2% in EC-DT vs 13.5% in EC-DL, P=0.030). Multivariate analyses showed that treatment (P=0.036) and ER (P=0.014) were the only predictors of pCR in both groups.Conclusion:EC-DT exhibited higher efficacy and lower toxicity than EC-DL. Of the different biomarkers studied, only the absence of ER expression was associated with increased pCR. © 2014 Cancer Research UK.
Original languageEnglish
Pages (from-to)1139-1147
JournalBritish Journal of Cancer
Volume110
Issue number5
DOIs
Publication statusPublished - 4 Mar 2014

Keywords

  • Biomarkers
  • HER2-positive breast cancer
  • Lapatinib
  • Neoadjuvant
  • Trastuzumab

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