Abstract
Background
In the era of personalized therapy, targeted treatment in specific patient populations is mandated.
Objective
We evaluated the efficacy and safety of neoadjuvant treatment on locally advanced breast cancer (LABC) with a monoclonal agent against vascular endothelial growth factor (VEGF), bevacizumab plus chemotherapy combination of liposomal doxorubicin, cyclophosphamide and paclitaxel (PLAC-B).
Methods
Patients enrolled were at premenopausal status and characterized by human epidermal growth factor receptor 2 (HER2)-negative, hormone-receptor positive (estrogen receptor/progesterone receptor-positive [ER/PR+]) or triple-negative (TNBC), LABC (T > 3 cm), with high-grade ductal carcinoma. Patients had to have a measurable disease and Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0, with adequate hematologic, renal, and hepatic function. Patients received intravenous liposomal doxorubicin 30 mg/m2, cyclophosphamide 600 mg/m2, paclitaxel 120 mg/m2, and bevacizumab 8 mg/kg on day 1 of 15-day cycles for four cycles (four administrations as neoadjuvant treatment). The primary endpoint was complete clinical (cCR) and pathologic (pCR) response rates, while secondary endpoints included safety, breast-conserving surgery (BCS) conversion rate, and disease-free survival (DFS).
Results
Sixty-two women were enrolled; 20 were ER/PR+ and 42 had TNBC. All underwent surgery, six received mastectomy, and 56 (90.3%) received BCS, with an equal conversion rate from initial indication for mastectomy. cCR was 25.8%. pCR in the breast and axilla occurred in 24 patients (38.7%). pCR was 42.9% for TNBC and 30% for ER/PR+. Hematologic adverse events (AEs) included neutropenia (74.2% total; 22.6% grade 3 [G3]) and febrile neutropenia (6.5% G3); non-hematologic G3 AEs included nausea (6.5%), mucositis (9.7%), and infection (3.2%), all of which were managed without negative sequelae. Over a 3-year follow-up, all patients were alive and DFS was 87.1%.
Conclusion
PLAC-B as neoadjuvant treatment of this subpopulation with TNBC and ER/PR+ patients is effective and safe. Further studies are necessitated.
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Ekaterini C. Tampaki, Athanasios Tampakis, Constantinos E. Alifieris, Dimitrios Krikelis, Anastasia Pazaiti, Michalis Kontos, and Dimitrios T. Trafalis declare that they have no conflicts of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in this study.
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Tampaki, E.C., Tampakis, A., Alifieris, C.E. et al. Efficacy and Safety of Neoadjuvant Treatment with Bevacizumab, Liposomal Doxorubicin, Cyclophosphamide and Paclitaxel Combination in Locally/Regionally Advanced, HER2-Negative, Grade III at Premenopausal Status Breast Cancer: A Phase II Study. Clin Drug Investig 38, 639–648 (2018). https://doi.org/10.1007/s40261-018-0655-z
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DOI: https://doi.org/10.1007/s40261-018-0655-z