First-line bevacizumab plus taxane-based chemotherapy for locally recurrent or metastatic breast cancer: safety and efficacy in an open-label study in 2251 patients |
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| Institution: | 1. Breast Unit, Royal Marsden Hospital, London, and the Institute of Cancer Research, London, UK;2. Department of Medical Oncology, Institut Curie, Université Paris Descartes, Paris, France;3. Medical Oncology Unit, Department of Oncology, Prato Hospital, Tuscany Cancer Institute, Prato, Italy;4. Oncology Department, Hospital Universitario 12 de Octubre, Madrid, Spain;5. Department of Gynaecology, Martin-Luther-Universitaet Halle-Wittenberg, Halle, Germany;6. Department of Medical Oncology, University Hospital Jean Minjoz, Besançon, France;7. Division of Medical Oncology, Regina Elena National Cancer Institute, Rome, Italy;8. Department of Medical Oncology, Cancer Hospital and Institute, Chinese Academy of Medical Sciences, Beijing, China;9. Chemotherapeutic Department, City Clinical Oncology Hospital #62, Moscow, Russia;10. Cancer Treatment Centre (CACON), Associação Hospital de Caridade de Ijuí, Ijuí, Brazil;11. Breast Cancer Unit, Sheba Tel Hashomer, Ramat Gan, Israel;12. Department of Cancer Services, Mater Hospital, South Brisbane, Australia;13. Department of Breast Cancer and Reconstructive Surgery, Marii Sklodowskiej-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland;14. Department of Haematology/Medical Oncology, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands;15. Department of Surgery, The University of Hong Kong, Queen Mary Hospital, Hong Kong;16. Department of Medical Oncology, Fundación Rodolfo Padilla, Padilla, Mexico;17. Department of Medical Oncology, National Cancer Institute, Bratislava, Slovak Republic;18. Department of Medical Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic;19. Medical Oncology Department, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal;20. Sunnybrook Odette Cancer Centre and Department of Medicine, University of Toronto, Toronto, Canada |
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| Abstract: | BackgroundFirst-line bevacizumab combined with chemotherapy significantly improves efficacy versus chemotherapy alone in human epidermal growth factor receptor 2 (HER2)-negative locally recurrent or metastatic breast cancer (LR/mBC). This large, open-label study further assesses first-line bevacizumab with taxane-based chemotherapy in routine oncology practice.Patients and methodsPatients with HER2-negative LR/mBC, Eastern Cooperative Oncology Group (ECOG) performance status (PS) of zero to two and no prior chemotherapy for LR/mBC received bevacizumab 10 mg/kg every 2 weeks or 15 mg/kg every 3 weeks plus taxane-based chemotherapy (or other non-anthracycline chemotherapy) until disease progression, unacceptable toxicity or patient withdrawal. The primary end point was safety; time to progression (TtP) was a secondary end point.ResultsMedian follow-up in 2251 treated patients was 12.7 months. Median age was 53 years and 94% of patients had ECOG PS of zero or one. Bevacizumab was most commonly administered with single-agent paclitaxel (35%), single-agent docetaxel (33%) or taxane-based combination therapy (10%). The most frequent grade ≥3 adverse event (AE) was neutropenia (5.4%). Grade ≥3 AEs previously associated with bevacizumab included hypertension (4.4%), arterial/venous thromboembolism (3.2%), proteinuria (1.7%) and bleeding (1.4%). No new bevacizumab safety signals were observed. Median TtP was 9.5 months (95% confidence interval 9.1–9.9).ConclusionsThe study population in ATHENA was more representative of general oncology practice than populations enrolled into randomised trials, although there may have been some bias towards younger, fitter patients. The safety and efficacy of bevacizumab–taxane therapy in this large study were consistent with results from randomised first-line trials. |
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