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A phase 1 study of SU11248 in the treatment of patients with refractory or resistant acute myeloid leukemia AML or not amenable to conventional therapy for the disease
by:In: Blood, Vol. 105, Nr. 3
(2005)
, p. 986-993.
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| URL: | PM:15459012 |
Abstract
Fifteen patients with refractory AML were treated in a phase 1 study with SU11248, an oral kinase inhibitor of fms-like tyrosine kinase 3 Flt3, Kit, vascular endothelial growth factor VEGF, and platelet-derived growth factor PDGF receptors. Separate cohorts of patients received SU11248 for 4-week cycles followed by either a 2- or a 1-week rest period. At the starting dose level of 50 mg n = 13, no dose-limiting toxicities were observed. The most frequent grade 2 toxicities were edema, fatigue, and oral ulcerations. Two fatal bleedings possibly related to the disease, one from a concomitant lung cancer and one cerebral bleeding, were observed. At the 75 mg dose level n = 2, one case each of grade 4 fatigue, hypertension, and cardiac failure was observed, and this dose level was abandoned. All patients with FLT3 mutations n = 4 had morphologic or partial responses compared with 2 of 10 evaluable patients with wild-type FLT3. Responses, although longer in patients with mutated


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