Jonathan Strosberg1, Ghassan El-Haddad1, Edward Wolin1, Andrew Hendifar1, James Yao1, Beth Chasen1, Erik Mittra1, Pamela L Kunz1, Matthew H Kulke1, Heather Jacene1, David Bushnell1, Thomas M O'Dorisio1, Richard P Baum1, Harshad R Kulkarni1, Martyn Caplin1, Rachida Lebtahi1, Timothy Hobday1, Ebrahim Delpassand1, Eric Van Cutsem1, Al Benson1, Rajaventhan Srirajaskanthan1, Marianne Pavel1, Jaime Mora1, Jordan Berlin1, Enrique Grande1, Nicholas Reed1, Ettore Seregni1, Kjell Öberg1, Maribel Lopera Sierra1, Paola Santoro1, Thomas Thevenet1, Jack L Erion1, Philippe Ruszniewski1, Dik Kwekkeboom1, Eric Krenning1. 1. From the Moffitt Cancer Center, Tampa, FL (J.S., G.E.-H.); Markey Cancer Center, University of Kentucky, Lexington (E.W.); Cedars Sinai Medical Center, Los Angeles (A.H.), and Stanford University School of Medicine, Stanford (E.M., P.L.K.) - both in California; University of Texas M.D. Anderson Cancer Center (J.Y., B.C.) and Excel Diagnostics Imaging Clinic (E.D.), Houston; Dana-Farber Cancer Institute, Boston (M.H.K., H.J.); University of Iowa, Iowa City (D.B., T.M.O.); Zentralklinik, Bad Berka (R.P.B., H.R.K.), and Charité-Universitätsmedizin, Berlin (M.P.) - both in Germany; Royal Free Hospital (M.C.) and King's College Hospital NHS Foundation Trust (R.S.), London, and Beatson Oncology Centre, Glasgow (N.R.) - all in the United Kingdom; Hôpital Beaujon, Clichy (R.L., P.R.), and Advanced Accelerator Applications, St. Genis-Pouilly (T.T.) - both in France; Mayo Clinic College of Medicine, Rochester, MN (T.H.); University Hospitals and KU Leuven, Leuven, Belgium (E.V.C.); Robert H. Lurie Comprehensive Cancer Center, Chicago (A.B.); Hospital Universitari de Bellvitge, Barcelona (J.M.), and Hospital Universitario Ramón y Cajal, Madrid (E.G.) - both in Spain; Vanderbilt University Medical Center, Nashville (J.B.); Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Istituto Nazionale dei Tumori, Milan (E.S.); University Hospital, Uppsala University, Uppsala, Sweden (K.O.); Advanced Accelerator Applications USA, New York (M.L.S., P.S., J.L.E.); and Erasmus Medical Center, Rotterdam, the Netherlands (D.K., E.K.).
Abstract
BACKGROUND:Patients with advanced midgut neuroendocrine tumors who have had disease progression during first-line somatostatin analogue therapy have limited therapeutic options. This randomized, controlled trial evaluated the efficacy and safety of lutetium-177 (177Lu)-Dotatate in patients with advanced, progressive, somatostatin-receptor-positive midgut neuroendocrine tumors. METHODS: We randomly assigned 229 patients who had well-differentiated, metastatic midgut neuroendocrine tumors to receive either 177Lu-Dotatate (116 patients) at a dose of 7.4 GBq every 8 weeks (four intravenous infusions, plus best supportive care including octreotide long-acting repeatable [LAR] administered intramuscularly at a dose of 30 mg) (177Lu-Dotatate group) or octreotide LAR alone (113 patients) administered intramuscularly at a dose of 60 mg every 4 weeks (control group). The primary end point was progression-free survival. Secondary end points included the objective response rate, overall survival, safety, and the side-effect profile. The final analysis of overall survival will be conducted in the future as specified in the protocol; a prespecified interim analysis of overall survival was conducted and is reported here. RESULTS: At the data-cutoff date for the primary analysis, the estimated rate of progression-free survival at month 20 was 65.2% (95% confidence interval [CI], 50.0 to 76.8) in the 177Lu-Dotatate group and 10.8% (95% CI, 3.5 to 23.0) in the control group. The response rate was 18% in the 177Lu-Dotatate group versus 3% in the control group (P<0.001). In the planned interim analysis of overall survival, 14 deaths occurred in the 177Lu-Dotatate group and 26 in the control group (P=0.004). Grade 3 or 4 neutropenia, thrombocytopenia, and lymphopenia occurred in 1%, 2%, and 9%, respectively, of patients in the 177Lu-Dotatate group as compared with no patients in the control group, with no evidence of renal toxic effects during the observed time frame. CONCLUSIONS: Treatment with 177Lu-Dotatate resulted in markedly longer progression-free survival and a significantly higher response rate than high-dose octreotide LAR among patients with advanced midgut neuroendocrine tumors. Preliminary evidence of an overall survival benefit was seen in an interim analysis; confirmation will be required in the planned final analysis. Clinically significant myelosuppression occurred in less than 10% of patients in the 177Lu-Dotatate group. (Funded by Advanced Accelerator Applications; NETTER-1 ClinicalTrials.gov number, NCT01578239 ; EudraCT number 2011-005049-11 .).
RCT Entities:
BACKGROUND:Patients with advanced midgut neuroendocrine tumors who have had disease progression during first-line somatostatin analogue therapy have limited therapeutic options. This randomized, controlled trial evaluated the efficacy and safety of lutetium-177 (177Lu)-Dotatate in patients with advanced, progressive, somatostatin-receptor-positive midgut neuroendocrine tumors. METHODS: We randomly assigned 229 patients who had well-differentiated, metastatic midgut neuroendocrine tumors to receive either 177Lu-Dotatate (116 patients) at a dose of 7.4 GBq every 8 weeks (four intravenous infusions, plus best supportive care including octreotide long-acting repeatable [LAR] administered intramuscularly at a dose of 30 mg) (177Lu-Dotatate group) or octreotide LAR alone (113 patients) administered intramuscularly at a dose of 60 mg every 4 weeks (control group). The primary end point was progression-free survival. Secondary end points included the objective response rate, overall survival, safety, and the side-effect profile. The final analysis of overall survival will be conducted in the future as specified in the protocol; a prespecified interim analysis of overall survival was conducted and is reported here. RESULTS: At the data-cutoff date for the primary analysis, the estimated rate of progression-free survival at month 20 was 65.2% (95% confidence interval [CI], 50.0 to 76.8) in the 177Lu-Dotatate group and 10.8% (95% CI, 3.5 to 23.0) in the control group. The response rate was 18% in the 177Lu-Dotatate group versus 3% in the control group (P<0.001). In the planned interim analysis of overall survival, 14 deaths occurred in the 177Lu-Dotatate group and 26 in the control group (P=0.004). Grade 3 or 4 neutropenia, thrombocytopenia, and lymphopenia occurred in 1%, 2%, and 9%, respectively, of patients in the 177Lu-Dotatate group as compared with no patients in the control group, with no evidence of renal toxic effects during the observed time frame. CONCLUSIONS: Treatment with 177Lu-Dotatate resulted in markedly longer progression-free survival and a significantly higher response rate than high-dose octreotide LAR among patients with advanced midgut neuroendocrine tumors. Preliminary evidence of an overall survival benefit was seen in an interim analysis; confirmation will be required in the planned final analysis. Clinically significant myelosuppression occurred in less than 10% of patients in the 177Lu-Dotatate group. (Funded by Advanced Accelerator Applications; NETTER-1 ClinicalTrials.gov number, NCT01578239 ; EudraCT number 2011-005049-11 .).
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