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Carvajal, Richard D.; Piperno-Neumann, Sophie; Kapiteijn, Ellen; Chapman, Paul B.; Frank, Stephen; Joshua, Anthony M.; Piulats, Josep M.; Wolter, Pascal; Cocquyt, Veronique; Chmielowski, Bartosz; Evans, T. R. Jeffry; Gastaud, Lauris; Linette, Gerald; Berking, Carola; Schachter, Jacob; Rodrigues, Manuel J.; Shoushtari, Alexander N.; Clemett, Delyth; Ghiorghiu, Dana; Mariani, Gabriella; Spratt, Shirley; Lovick, Susan; Barker, Peter; Kilgour, Elaine; Lai, Zhongwu; Schwartz, Gary K.; Nathan, Paul (2018): Selumetinib in Combination With Dacarbazine in Patients With Metastatic Uveal Melanoma: A Phase III, Multicenter, Randomized Trial (SUMIT). In: Journal of Clinical Oncology, Vol. 36, No. 12: pp. 1232-1239
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Abstract

PurposeUveal melanoma is the most common primary intraocular malignancy in adults with no effective systemic treatment option in the metastatic setting. Selumetinib (AZD6244, ARRY-142886) is an oral, potent, and selective MEK1/2 inhibitor with a short half-life, which demonstrated single-agent activity in patients with metastatic uveal melanoma in a randomized phase II trial.Methods: The Selumetinib (AZD6244: ARRY-142886) (Hyd-Sulfate) in Metastatic Uveal Melanoma (SUMIT) study was a phase III, double-blind trial (ClinicalTrial.gov identifier: NCT01974752) in which patients with metastatic uveal melanoma and no prior systemic therapy were randomly assigned (3:1) to selumetinib (75 mg twice daily) plus dacarbazine (1,000 mg/m(2) intravenously on day 1 of every 21-day cycle) or placebo plus dacarbazine. The primary end point was progression-free survival (PFS) by blinded independent central radiologic review. Secondary end points included overall survival and objective response rate.Results: A total of 129 patients were randomly assigned to receive selumetinib plus dacarbazine (n = 97) or placebo plus dacarbazine (n = 32). In the selumetinib plus dacarbazine group, 82 patients (85%) experienced a PFS event, compared with 24 (75%) in the placebo plus dacarbazine group (median, 2.8 v 1.8 months);the hazard ratio for PFS was 0.78 (95% CI, 0.48 to 1.27;two-sided P = .32). The objective response rate was 3% with selumetinib plus dacarbazine and 0% with placebo plus dacarbazine (two-sided P = .36). At 37% maturity (n = 48 deaths), analysis of overall survival gave a hazard ratio of 0.75 (95% CI, 0.39 to 1.46;two-sided P = .40). The most frequently reported adverse events (selumetinib plus dacarbazine v placebo plus dacarbazine) were nausea (62% v 19%), rash (57% v 6%), fatigue (44% v 47%), diarrhea (44% v 22%), and peripheral edema (43% v 6%).Conclusion: In patients with metastatic uveal melanoma, the combination of selumetinib plus dacarbazine had a tolerable safety profile but did not significantly improve PFS compared with placebo plus dacarbazine.