Compassionate use of sorafenib in FLT3-ITD-positive acute myeloid leukemia: sustained regression before and after allogeneic stem cell transplantation - PubMed (original) (raw)

Case Reports

. 2009 Jun 25;113(26):6567-71.

doi: 10.1182/blood-2009-03-208298. Epub 2009 Apr 23.

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Case Reports

Compassionate use of sorafenib in FLT3-ITD-positive acute myeloid leukemia: sustained regression before and after allogeneic stem cell transplantation

Stephan Metzelder et al. Blood. 2009.

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Abstract

Acute myeloid leukemia (AML) patients with internal tandem duplication (ITD) mutations in the Fms-like tyrosine-3 (FLT3) gene have a dismal prognosis. Here we report compassionate-use results with the multikinase and FLT3-ITD inhibitor sorafenib for the treatment of relapsed or refractory FLT3-ITD-positive AML. Sorafenib induced clinically meaningful and very rapid responses in all 6 patients treated either before (n = 2), after (n = 3), or both before and after (n = 1) allogeneic stem cell transplantation (allo-SCT). Sorafenib-induced remissions facilitated allo-SCT in 2 of the 3 refractory patients. Two of the 4 patients who were treated after allo-SCT survived 216 and 221 days, respectively, whereas the other 2 remain in ongoing complete molecular remission. Sorafenib response was associated with an inhibition of the antiapoptotic FLT3-ITD target Stat-5 in vivo. Together, sorafenib monotherapy before or after allo-SCT has remarkable clinical activity in poor risk FLT3-ITD-positive AML and deserves further evaluation in prospective clinical trials.

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