Survival after neoadjuvant chemotherapy with or without bevacizumab or everolimus for HER2-negative primary breast cancer (GBG 44-GeparQuinto)†.

Abstract

BACKGROUND:

The GeparQuinto study showed that adding bevacizumab to 24 weeks of anthracycline-taxane-based neoadjuvant chemotherapy increases pathological complete response (pCR) rates overall and specifically in patients with triple-negative breast cancer (TNBC). No difference in pCR rate was observed for adding everolimus to paclitaxel in nonearly responding patients. Here, we present disease-free (DFS) and overall survival (OS) analyses.

PATIENTS AND METHODS:

Patients (n = 1948) with HER2-negative tumors of a median tumor size of 4 cm were randomly assigned to neoadjuvant treatment with epirubicin/cyclophosphamide followed by docetaxel (EC-T) with or without eight infusions of bevacizumab every 3 weeks before surgery. Patients without clinical response to EC ± Bevacizumab were randomized to 12 weekly cycles paclitaxel with or without everolimus 5 mg/day. To detect a hazard ratio (HR) of 0.75 (α = 0.05, β = 0.8) 379 events had to be observed in the bevacizumab arms.

RESULTS:

With a median follow-up of 3.8 years, 3-year DFS was 80.8% and 3-year OS was 89.7%. Outcome was not different for patients receiving bevacizumab (HR 1.03; P = 0.784 for DFS and HR 0.974; P = 0.842 for OS) compared with patients receiving chemotherapy alone. Patients with TNBC similarly showed no improvement in DFS (HR = 0.99; P = 0.941) and OS (HR = 1.02; P = 0.891) when treated with bevacizumab. No other predefined subgroup (HR+/HER2-; locally advanced (cT4 or cN3) or not; cT1-3 or cT4; pCR or not) showed a significant benefit. No difference in DFS (HR 0.997; P = 0.987) and OS (HR 1.11; P = 0.658) was observed for nonearly responding patients receiving paclitaxel with or without everolimus overall as well as in subgroups.

CONCLUSIONS:

Long-term results, in opposite to the results of pCR, do not support the neoadjuvant use of bevacizumab in addition to an anthracycline-taxane-based chemotherapy or everolimus in addition to paclitaxel for nonearly responding patients.

CLINICAL TRIAL NUMBER:

NCT 00567554, www.clinicaltrials.gov.

• Authors: G von Minckwitz, S Loibl, M Untch, H Eidtmann, M Rezai, P A Fasching, H Tesch, H Eggemann, I Schrader, K Kittel, C Hanusch, J Huober, C Solbach, C Jackisch, G Kunz, J U Blohmer, M Hauschild, T Fehm, V Nekljudova, B Gerber, GBG/AGO-B study groups, K Gnauert, B Heinrich, T Prätz, U Groh, H Tanzer, C Villena, A Tulusan, B Liedtke, J-U Blohmer, K Kittel, C Mau, J Potenberg, J Schilling, M Just, E Weiss, U Bückner, M Wolfgarten, R Lorenz, G Doering, S Feidicker, P Krabisch, U Deichert, D Augustin, G Kunz, K Kast, G von Minckwitz, C Nestle-Krämling, M Rezai, C Höß, J Terhaag, P Fasching, P Staib, B Aktas, T Kühn, F Khandan, V Möbus, C Solbach, H Tesch, E Stickeler, G Heinrich, H Wagner, A Abdallah, T Dewitz, G Emons, A Belau, V Rethwisch, T Lantzsch, C Thomssen, U Mattner, A Nugent, V Müller, T Noesselt, F Holms, T Müller, J-U Deuker, I Schrader, D Strumberg, C Uleer, E Solomayer, I Runnebaum, H Link, O Tomé, H-U Ulmer, B Conrad, G Feisel-Schwickardi, H Eidtmann, C Schumacher, T Steinmetz, I Bauerfeind, S Kremers, D Langanke, U Kullmer, A Ober, D Fischer, A Kohls, W Weikel, J Bischoff, K Freese, M Schmidt, W Wiest, M Sütterlin, M Dietrich, M Grießhammer, D-M Burgmann, C Hanusch, B Rack, C Salat, D Sattler, J Tio, E von Abel, B Christensen, U Burkamp, C-H Köhne, W Meinerz, S-T Graßhoff, T Decker, F Overkamp, I Thalmann, A Sallmann, T Beck, T Reimer, G Bartzke, M Deryal, M Weigel, J Huober, P Weder, C-C Steffens, S Lemster, A Stefek, F Ruhland, M Hofmann, J Schuster, W Simon, U Kronawitter, M Clemens, T Fehm, W Janni, K Latos, W Bauer, A Roßmann, L Bauer, D Lampe, V Heyl, G Hoffmann, F Lorenz-Salehi, J Hackmann, R Schlag
• Journal: Annals of oncology : official journal of the European Society for Medical Oncology (Ann Oncol) Vol. 25 Issue 12 Pg. 2363-2372 (Dec 2014) ISSN: 1569-8041 [Electronic] England
• PMID: 25223482 (Publication Type: Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: © The Author 2014. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved. For permissions, please email: [email protected].

Chemical References

• Angiogenesis Inhibitors
• Antibodies, Monoclonal, Humanized
• Bevacizumab
• Everolimus
• Receptor, ErbB-2
• Sirolimus

Topics

• Adult
• Angiogenesis Inhibitors (administration & dosage, therapeutic use)
• Antibodies, Monoclonal, Humanized (administration & dosage, therapeutic use)
• Bevacizumab
• Breast Neoplasms (drug therapy, metabolism)
• Chemotherapy, Adjuvant
• Drug Therapy, Combination
• Everolimus
• Female
• Humans
• Middle Aged
• Receptor, ErbB-2 (metabolism)
• Sirolimus (administration & dosage, analogs & derivatives, therapeutic use)
• Survival Analysis