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  • Title: K313dup is a recurrent CEBPA mutation in de novo acute myeloid leukemia (AML).
    Author: Carnicer MJ, Lasa A, Buschbeck M, Serrano E, Carricondo M, Brunet S, Aventin A, Sierra J, Di Croce L, Nomdedeu JF.
    Journal: Ann Hematol; 2008 Oct; 87(10):819-27. PubMed ID: 18587575.
    Abstract:
    The CEBPA gene codes for a transcription factor that has a pivotal role in controlling proliferation and differentiation of myeloid progenitors. Acquired CEBPA mutations have been found in acute myeloid leukemias (AML) with a good prognosis, and most of these patients have a normal karyotype. In this paper, we report four cases that displayed the same K313dup in the CEBPA gene. All four had an AML-M1 with CD7 positivity and T-cell receptor gamma chain (TCR-gamma) rearrangement. This mutation could represent nearly 10% of all CEBPA mutations described to date. K313dup disappeared in samples from patients in complete remission. In transfected cells, the K313dup mutant had reduced protein stability with respect to the wild-type protein. K313dup seems to be selected in leukemic cells, and its frequency in other AML series could be determined using the screening method reported in this paper.
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