The Successful Complete Remission Induction by Sorafenib Monotherapy in a FLT3-D835Y-Positive Patient with Refractory Acute Monocytic Leukemia
2016
Sorafenib has been shown to be active in AML patients with FLT3-ITD. However, the effect of sorafenib in AML patients with FLT-TKD has never been well determined. Moreover, acquisition of secondary FLT3 TKD mutations, mainly at D835 (D835F/H/V/Y), are recognized as the major mechanisms of resistance of AML patients with FLT3-ITD to sorafenib. It has been reported that sorafenib induced death of cells that expressed the FLT3-ITD or FLT3-D835G but not cells that expressed the FLT3-D835Y point mutant or wild-type FLT3 in vitro. Here, we report the successful complete remission induction by sorafenib monotherapy in a FLT3-D835Y-positive patient with refractory AML-M5 followed by allogeneic stem cell transplantation.
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