Journal
LEUKEMIA & LYMPHOMA
Volume 44, Issue 1, Pages 1-7Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/1042819021000040233
Keywords
FLT3; pathogenesis; prognosis; AML; mutations
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FLT3, a tyrosine kinase receptor class III (RTK), and its ligand (FL) are important for normal haematopoiesis and the development of the immune system. Recently, internal tandem duplications (FLT3 ITDs) in exons 14 and/or 15 that lead to constitutive receptor activation, have been described in 20-25% of adults with acute myeloid leukaemia (AML). The FLT ITD mutations, which are thought to disrupt a repressor sequence in the juxta-membrane region, confer a poor prognosis in AML, especially in patients under the age of 60 years. Furthermore, FLT3 activating loop mutations involving exon 20 have been reported in 7% of AML cases, making FLT3 the most commonly mutated gene in AML. FLT3, therefore, is a potentially important molecular target for AML therapy and already phase I clinical trials have been initiated.
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