Published in:
Open Access
01-10-2013 | Research Article
Bevacizumab plus preoperative chemotherapy in operable HER2 negative breast cancer: biomarkers and pathologic response
Authors:
P. Sánchez-Rovira, M. A. Seguí, A. Llombart, E. Aranda, A. Antón, A. Sánchez, M. Lomas, A. Jaén, M. Fernández, I. Porras, E. Dalmau, S. Morales, J. de la Haba-Rodríguez
Published in:
Clinical and Translational Oncology
|
Issue 10/2013
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Abstract
Purpose
The primary aim of this trial was to assess the rate of pathologic complete responses (pCR) of doxorubicin/cyclophosphamide (AC) followed by bevacizumab/docetaxel (BT), as neoadjuvant therapy for breast cancer (BC). Furthermore, the association between biomarkers and the pCR was explored.
Methods
Patients with HER-negative operable stage II–III BC ≥2 cm were enrolled. Four cycles of AC (A 60 mg/m2 and C 600 mg/m2, every 3 weeks) followed by 4 cycles of BT (B 15 mg/kg and T 75 mg/m2, every 3 weeks), were planned. A core-biopsy was performed for biological markers assessment.
Results
Seventy-two women were included. Forty-three (63 %) patients were hormone receptor-positive. Sixty-four (89 %) completed the planned treatment, and 66 evaluable patients underwent surgery (92 %): a pCR was achieved in 16 of them (24, 95 % CI 15–36 %). pCR was significantly higher in tumors hormone receptor-negative, and in those with Angiotensin II type 1 receptor (AGTR1) protein overexpression. The overall clinical response rate was 86 % (95 % CI 76–93 %), including 42 complete responses. No unexpected toxicities or treatment-related deaths were observed.
Conclusion
This regimen showed a remarkable clinical and pathological activity: the suggested relation between pCR and AGTR1 overexpression should be confirmed in larger trials.