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  • Title: FLT3 mutations in a 10 year consecutive series of 177 childhood acute leukemias and their impact on global gene expression patterns.
    Author: Andersson A, Paulsson K, Lilljebjörn H, Lassen C, Strömbeck B, Heldrup J, Behrendtz M, Johansson B, Fioretos T.
    Journal: Genes Chromosomes Cancer; 2008 Jan; 47(1):64-70. PubMed ID: 17943971.
    Abstract:
    During 1995-2004, 209 children/adolescents were diagnosed with acute lymphoblastic or myeloid leukemia (ALL, AML) in Southern Sweden, of which 177 (85%), comprising 128 B-lineage ALL, 34 AML, and 15 T-cell ALL, could be analyzed for internal tandem duplications (ITD) and activating point mutations in the second tyrosine kinase domain (ATKD) of FLT3. Seventeen (10%) FLT3 mutations (6 ITD, 11 ATKD; mutually exclusive) were detected. None of the T-cell ALL harbored any mutations. ITD and ATKD were found in 2% and 6% of the B-lineage ALL and in 12% and 9% of the AML, being particularly common in high hyperdiploid ALL (14%), ALL (20%), and AML (23%) with 11q23/MLL rearrangements, and in AML with a normal karyotype (60%). All ATKD-positive AML with MLL rearrangements harbored the t(9;11)(p21;q23). Global gene expression data were available for 76 of the B-lineage ALL and 19 of the AML, of which 6 (8%) and 3 (16%) had FLT3 mutations, respectively. No distinct expression pattern associated with FLT3 mutations was identified.
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