1. Margetuximab Versus Trastuzumab in Patients With Previously Treated HER2-Positive Advanced Breast Cancer (SOPHIA): Final Overall Survival Results From a Randomized Phase 3 Trial
- Author
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Rugo, Hope S, Im, Seock-Ah, Cardoso, Fatima, Cortes, Javier, Curigliano, Giuseppe, Musolino, Antonino, Pegram, Mark D, Bachelot, Thomas, Wright, Gail S, Saura, Cristina, Escrivá-de-Romaní, Santiago, De Laurentiis, Michelino, Schwartz, Gary N, Pluard, Timothy J, Ricci, Francesco, Gwin, William R, Levy, Christelle, Brown-Glaberman, Ursa, Ferrero, Jean-Marc, de Boer, Maaike, Kim, Sung-Bae, Petráková, Katarína, Yardley, Denise A, Freedman, Orit, Jakobsen, Erik H, Gal-Yam, Einav Nili, Yerushalmi, Rinat, Fasching, Peter A, Kaufman, Peter A, Ashley, Emily J, Perez-Olle, Raul, Hong, Shengyan, Rosales, Minori Koshiji, Gradishar, William J, Interne Geneeskunde, MUMC+: MA Medische Oncologie (9), RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, Institut Català de la Salut, [Rugo HS] University of California San Francisco Helen Diller Family Comprehensive Cancer Center, San Francisco, CA. [Im SA] Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, South Korea. [Cardoso F] Breast Unit, Champalimaud Clinical Center/Champalimaud Foundation, Lisbon, Portugal. [Cortes J] Quironsalud Group, International Breast Cancer Center (IBCC), Madrid and Barcelona, Spain. Department of Medicine, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Madrid, Spain. [Curigliano G] Istituto Europeo di Oncologia, IRCCS, University of Milano, Milan, Italy. [Musolino A] Department of Medicine and Surgery, University of Parma, Parma, Italy. Medical Oncology and Breast Unit, University Hospital of Parma, Parma, Italy. Gruppo Oncologico Italiano di Ricerca Clinica (GOIRC), Parma, Italy. [Saura C, Escrivá-de-Romaní S] Servei d’Oncologia Mèdica, Vall d'Hebron Hospital Universitari, Barcelona, Spain. Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain, and Vall d'Hebron Barcelona Hospital Campus
- Subjects
Cancer Research ,neoplasias::neoplasias por localización::neoplasias de la mama [ENFERMEDADES] ,Oncology ,Anticossos monoclonals - Ús terapèutic ,Otros calificadores::/uso terapéutico [Otros calificadores] ,Neoplasms::Neoplasms by Site::Breast Neoplasms [DISEASES] ,Mama - Càncer - Tractament ,Otros calificadores::Otros calificadores::/farmacoterapia [Otros calificadores] ,aminoácidos, péptidos y proteínas::proteínas::proteínas sanguíneas::inmunoproteínas::inmunoglobulinas::anticuerpos::anticuerpos monoclonales::anticuerpos monoclonales humanizados [COMPUESTOS QUÍMICOS Y DROGAS] ,Other subheadings::/therapeutic use [Other subheadings] ,Amino Acids, Peptides, and Proteins::Proteins::Blood Proteins::Immunoproteins::Immunoglobulins::Antibodies::Antibodies, Monoclonal::Antibodies, Monoclonal, Humanized [CHEMICALS AND DRUGS] ,Other subheadings::Other subheadings::/drug therapy [Other subheadings] - Abstract
Clinical trials frequently include multiple end points that mature at different times. The initial report, typically based on the primary end point, may be published when key planned co-primary or secondary analyses are not yet available. Clinical Trial Updates provide an opportunity to disseminate additional results from studies, published in JCO or elsewhere, for which the primary end point has already been reported. Final overall survival (OS) in SOPHIA (ClinicalTrials.gov identifier: NCT02492711 ), a study of margetuximab versus trastuzumab, both with chemotherapy, in patients with previously treated human epidermal growth factor receptor 2–positive advanced breast cancer, is reported with updated safety. Overall, 536 patients in the intention-to-treat population were randomly assigned to margetuximab (15 mg/kg intravenously once every 3 weeks; n = 266) plus chemotherapy or trastuzumab (6 mg/kg intravenously once every 3 weeks after a loading dose of 8 mg/kg; n = 270) plus chemotherapy. Primary end points were progression-free survival, previously reported, and OS. Final OS analysis was triggered by 385 prespecified events. The median OS was 21.6 months (95% CI, 18.89 to 25.07) with margetuximab versus 21.9 months (95% CI, 18.69 to 24.18) with trastuzumab (hazard ratio [HR], 0.95; 95% CI, 0.77 to 1.17; P = .620). Preplanned, exploratory analysis of CD16A genotyping suggested a possible improvement in OS for margetuximab in CD16A-158FF patients versus trastuzumab (median OS, 23.6 v 19.2 months; HR, 0.72; 95% CI, 0.52 to 1.00) and a possible improvement in OS for trastuzumab in CD16A-158VV patients versus margetuximab (median OS, 31.1 v 22.0 months; HR, 1.77; 95% CI, 1.01 to 3.12). Margetuximab safety was comparable with trastuzumab. Final overall OS analysis did not demonstrate margetuximab advantage over trastuzumab. Margetuximab studies in patients with human epidermal growth factor receptor 2–positive breast cancer with different CD16A allelic variants are warranted.
- Published
- 2023