An open-label, randomized phase III study of gilteritinib versus salvage chemotherapy in relapsed or refractory FLT3 mutation-positive acute myeloid leukemia.
2017
TPS7067Background: FLT3 mutations occur in 30% of patients with acute myeloid leukemia (AML), most often as internal tandem duplications (FLT3-ITD) or point mutations at codon D835. FLT3-ITDs are associated with high relapse rates, short remission duration, and poor overall survival (OS); FLT3-D835 can confer resistance to other tyrosine kinase inhibitors (TKIs). Gilteritinib is a highly selective FLT3/AXL TKI with activity against both FLT3-ITD and FLT3-D835 mutations. A recent phase 1/2 study of gilteritinib (20–450 mg/d) in relapsed/refractory (R/R) AML showed favorable tolerability at doses ≤300 mg/d, and consistent, potent FLT3 inhibition at doses ≥80 mg/d. Patients with FLT3 mutation-positive (FLT3mut+) AML receiving doses ≥80 mg/d had an ORR of 52% (CR/CRp/CRi = 41%, PR = 11%) and longer OS than historic experience in R/R AML with combination cytotoxic chemotherapy or other FLT3 TKIs as monotherapy. Given these results, we initiated a phase 3 trial of once-daily (QD) 120 mg gilteritinib. Methods: T...
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