Andrew N J Tutt1, Judy E Garber1, Bella Kaufman1, Giuseppe Viale1, Debora Fumagalli1, Priya Rastogi1, Richard D Gelber1, Evandro de Azambuja1, Anitra Fielding1, Judith Balmaña1, Susan M Domchek1, Karen A Gelmon1, Simon J Hollingsworth1, Larissa A Korde1, Barbro Linderholm1, Hanna Bandos1, Elżbieta Senkus1, Jennifer M Suga1, Zhimin Shao1, Andrew W Pippas1, Zbigniew Nowecki1, Tomasz Huzarski1, Patricia A Ganz1, Peter C Lucas1, Nigel Baker1, Sibylle Loibl1, Robin McConnell1, Martine Piccart1, Rita Schmutzler1, Guenther G Steger1, Joseph P Costantino1, Amal Arahmani1, Norman Wolmark1, Eleanor McFadden1, Vassiliki Karantza1, Sunil R Lakhani1, Greg Yothers1, Christine Campbell1, Charles E Geyer1. 1. From the Breast Cancer Now Toby Robins Research Centre, the Institute of Cancer Research (A.N.J.T.), and the Breast Cancer Now Unit, Guy's Hospital Cancer Centre, King's College London (A.N.J.T.), London, AstraZeneca, Cambridge (S.J.H., N.B.), and Frontier Science (Scotland), Kincraig (R.M.C., E.M.F., C.C.) - all in the United Kingdom; Dana-Farber Cancer Institute, Harvard Medical School (J.E.G., R.D.G.), Frontier Science Foundation (R.D.G.), and Harvard T.H. Chan School of Public Health (R.D.G.) - all in Boston; the Breast Oncology Institute, Chaim Sheba Medical Center, Tel Aviv University, Tel Aviv, Israel (B.K.); the University of Milan, European Institute of Oncology IRCCS, Milan (G.V.); Breast International Group (D.F., A.A.) and Institut Jules Bordet, l'Université Libre de Bruxelles (E.A., M.P.), Brussels; NRG Oncology (P.R., H.B., P.C.L., N.W., G.Y., C.E.G.) and the Basser Center for BRCA, Abramson Cancer Center, University of Pennsylvania (S.M.D.), Philadelphia, and the UPMC Hillman Cancer Center (P.R., P.C.L., N.W.) and the Department of Biostatistics (H.B., J.P.C., G.Y.), University of Pittsburgh, and the NSABP Foundation (N.W.), Pittsburgh - all in Pennsylvania; AstraZeneca, Gaithersburg (A.F.), and the National Cancer Institute, Rockville (L.A.K.) - both in Maryland; Vall d'Hebron Institute of Oncology and Vall d'Hebron University Hospital (J.B.) - both in Barcelona; BC Cancer, Vancouver, BC, Canada (K.A.G.); Sahlgrenska University Hospital (B.L.) and the Institute of Clinical Sciences, Department of Oncology, Sahlgrenska Academy, Gothenburg University (B.L.) - both in Gothenburg, Sweden; the Department of Oncology and Radiotherapy, Medical University of Gdańsk, Gdańsk (E.S.), the Maria Skłodowska-Curie National Research Institute of Oncology, Warsaw (Z.N.), the International Hereditary Cancer Center, Pomeranian Medical University, Szczecin (T.H.), and Read-Gene, Grzepnica (T.H.) - all in Poland; Kaiser Permanente Vallejo Medical Center, Vallejo (J.M.S.), and the UCLA Fielding School of Public Health, David Geffen School of Medicine at UCLA (P.A.G.), and the UCLA Jonsson Comprehensive Cancer Center (P.A.G.), Los Angeles - all in California; Fudan University Shanghai Cancer Center, Shanghai, China, (Z.S.); Georgia NCORP, Northside Hospital Cancer Institute (A.W.P.), and Piedmont Healthcare (A.W.P.) - both in Atlanta; German Breast Group, Neu-Isenburg (S.L.), the Center for Hematology and Oncology Bethanien and Goethe University, Frankfurt (S.L.), and the Center for Familial Breast and Ovarian Cancer and the Center for Integrated Oncology, Faculty of Medicine, University Hospital Cologne, Cologne (R.S.) - all in Germany; the Department of Internal Medicine I and Gaston H. Glock Research Center, Medical University of Vienna, Vienna (G.G.S.); Merck, Kenilworth, NJ (V.K.); the University of Queensland Centre for Clinical Research and Pathology Queensland (S.R.L.) - both in Brisbane, QLD, Australia; and Houston Methodist Cancer Center (C.E.G.) and Weill Cornell Medical College (C.E.G.) - both in Houston.
Abstract
BACKGROUND: Poly(adenosine diphosphate-ribose) polymerase inhibitors target cancers with defects in homologous recombination repair by synthetic lethality. New therapies are needed to reduce recurrence in patients with BRCA1 or BRCA2 germline mutation-associated early breast cancer. METHODS: We conducted a phase 3, double-blind, randomized trial involving patients with human epidermal growth factor receptor 2 (HER2)-negative early breast cancer with BRCA1 or BRCA2 germline pathogenic or likely pathogenic variants and high-risk clinicopathological factors who had received local treatment and neoadjuvant or adjuvant chemotherapy. Patients were randomly assigned (in a 1:1 ratio) to 1 year of oral olaparib or placebo. The primary end point was invasive disease-free survival. RESULTS: A total of 1836 patients underwent randomization. At a prespecified event-driven interim analysis with a median follow-up of 2.5 years, the 3-year invasive disease-free survival was 85.9% in the olaparib group and 77.1% in the placebo group (difference, 8.8 percentage points; 95% confidence interval [CI], 4.5 to 13.0; hazard ratio for invasive disease or death, 0.58; 99.5% CI, 0.41 to 0.82; P<0.001). The 3-year distant disease-free survival was 87.5% in the olaparib group and 80.4% in the placebo group (difference, 7.1 percentage points; 95% CI, 3.0 to 11.1; hazard ratio for distant disease or death, 0.57; 99.5% CI, 0.39 to 0.83; P<0.001). Olaparib was associated with fewer deaths than placebo (59 and 86, respectively) (hazard ratio, 0.68; 99% CI, 0.44 to 1.05; P = 0.02); however, the between-group difference was not significant at an interim-analysis boundary of a P value of less than 0.01. Safety data were consistent with known side effects of olaparib, with no excess serious adverse events or adverse events of special interest. CONCLUSIONS: Among patients with high-risk, HER2-negative early breast cancer and germline BRCA1 or BRCA2 pathogenic or likely pathogenic variants, adjuvant olaparib after completion of local treatment and neoadjuvant or adjuvant chemotherapy was associated with significantly longer survival free of invasive or distant disease than was placebo. Olaparib had limited effects on global patient-reported quality of life. (Funded by the National Cancer Institute and AstraZeneca; OlympiA ClinicalTrials.gov number, NCT02032823.).
BACKGROUND: Poly(adenosine diphosphate-ribose) polymerase inhibitors target cancers with defects in homologous recombination repair by synthetic lethality. New therapies are needed to reduce recurrence in patients with BRCA1 or BRCA2 germline mutation-associated early breast cancer. METHODS: We conducted a phase 3, double-blind, randomized trial involving patients with human epidermal growth factor receptor 2 (HER2)-negative early breast cancer with BRCA1 or BRCA2 germline pathogenic or likely pathogenic variants and high-risk clinicopathological factors who had received local treatment and neoadjuvant or adjuvant chemotherapy. Patients were randomly assigned (in a 1:1 ratio) to 1 year of oral olaparib or placebo. The primary end point was invasive disease-free survival. RESULTS: A total of 1836 patients underwent randomization. At a prespecified event-driven interim analysis with a median follow-up of 2.5 years, the 3-year invasive disease-free survival was 85.9% in the olaparib group and 77.1% in the placebo group (difference, 8.8 percentage points; 95% confidence interval [CI], 4.5 to 13.0; hazard ratio for invasive disease or death, 0.58; 99.5% CI, 0.41 to 0.82; P<0.001). The 3-year distant disease-free survival was 87.5% in the olaparib group and 80.4% in the placebo group (difference, 7.1 percentage points; 95% CI, 3.0 to 11.1; hazard ratio for distant disease or death, 0.57; 99.5% CI, 0.39 to 0.83; P<0.001). Olaparib was associated with fewer deaths than placebo (59 and 86, respectively) (hazard ratio, 0.68; 99% CI, 0.44 to 1.05; P = 0.02); however, the between-group difference was not significant at an interim-analysis boundary of a P value of less than 0.01. Safety data were consistent with known side effects of olaparib, with no excess serious adverse events or adverse events of special interest. CONCLUSIONS: Among patients with high-risk, HER2-negative early breast cancer and germline BRCA1 or BRCA2 pathogenic or likely pathogenic variants, adjuvant olaparib after completion of local treatment and neoadjuvant or adjuvant chemotherapy was associated with significantly longer survival free of invasive or distant disease than was placebo. Olaparib had limited effects on global patient-reported quality of life. (Funded by the National Cancer Institute and AstraZeneca; OlympiA ClinicalTrials.gov number, NCT02032823.).
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