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    Cancer Cell. 2008 Nov 4;14(5):355-68.

    H3K79 methylation profiles define murine and human MLL-AF4 leukemias.

    Krivtsov AV, Feng Z, Lemieux ME, Faber J, Vempati S, Sinha AU, Xia X, Jesneck J, Bracken AP, Silverman LB, Kutok JL, Kung AL, Armstrong SA.

    Division of Hematology/Oncology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA.

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    We created a mouse model wherein conditional expression of an Mll-AF4 fusion oncogene induces B precursor acute lymphoblastic (ALL) or acute myeloid leukemias (AML). Gene expression profile analysis of the ALL cells demonstrated significant overlap with human MLL-rearranged ALL. ChIP-chip analysis demonstrated histone H3 lysine 79 (H3K79) methylation profiles that correlated with Mll-AF4-associated gene expression profiles in murine ALLs and in human MLL-rearranged leukemias. Human MLL-rearranged ALLs could be distinguished from other ALLs by their H3K79 profiles, and suppression of the H3K79 methyltransferase DOT1L inhibited expression of critical MLL-AF4 target genes. We thus demonstrate that ectopic H3K79 methylation is a distinguishing feature of murine and human MLL-AF4 ALLs and is important for maintenance of MLL-AF4-driven gene expression.

    PMID: 18977325 [PubMed - indexed for MEDLINE]

    PMCID: 2591932

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