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Genes regulated by AML1/ETO in U937 cells

ABSTRACT: Approximately 20% of Acute Myelogenous Leukemia (AML) cases carry the t(8;21) translocation, which involves the AML1 and ETO genes, and express the resulting AML1/ETO fusion protein that functions as a transcriptional repressor by recruiting NCoR/SMRT/HDAC complexes to DNA. We used microarrays to identify genes differentially expressed in U937 cells expressing AML1/ETO compared to vector transfected U937 cells. Keywords: Transcriptional regulation

ORGANISM(S): Homo sapiens

PROVIDER: GSE10520 | GEO | 2008/11/28

SECONDARY ACCESSION(S): PRJNA108941

REPOSITORIES: GEO

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AML1/ETO binding pattern on human promoters

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AML1/ETO, AML1, and HEB binding patterns on chromosme 19

Project description:Approximately 20% of Acute Myelogenous Leukemia (AML) cases carry the t(8;21) translocation, which involves the AML1 and ETO genes, and express the resulting AML1/ETO fusion protein that functions as a transcriptional repressor by recruiting NCoR/SMRT/HDAC complexes to DNA. We used ChIP-chip to identify the determinants of AML1/ETO binding on a contiguous DNA region (chromosome 19). AML1/ETO binding regions are characterized by a specific sequence signature that includes the presence of the consensus binding sites for the AML1 and HEB transcription factors. We therefore assessed the binding patterns of AML1 and HEB on chromosome 19. A specific chromatin modification (tri-methylation of lysine 4 on histone 3 = 3MetK4) was also studied in U937 cells expressing AML1/ETO in order to correlate the identified binding profiles with active transcription sites. Keywords: ChIP-chip A U937 cell line that conditionally expresses HA-tagged AML1/ETO under the control of the mouse metallothionine promoter (U937-A1E) (Alcalay et al., J.Clin.Invest, 2003,112, 1751-1761) was used. Cell lines were treated for 8h with 100uM ZnSO4 to induce transgene expression in U937-A1E. We performed ChIP using anti-HA, anti-ETO, anti-AML1/RUNX1, anti-HEBor anti-3MetK4 antibodies. ChIP products were then PCR amplified, labeled with Cy3/Cy5 fluorescent dyes and hybridized to the NimbleGen custom made NGS_HG17_Chr.19Array. U937-Mt cells, which carry the empty vector, served as control (C) for non-specific antibody binding. Each sample identifier indicates Antibody_Cell line (example: HA_A1E = ChIP using anti HA antibody in U937-A1E cells; HA_C = ChIP using anti HA antibody in U937-Mt control cells)

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U937 AML1-ETO inducible samples

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Gene expression profile and DNA binding pattern of AML1/ETO in U937 cells

Project description:This SuperSeries is composed of the following subset Series: GSE10520: Genes regulated by AML1/ETO in U937 cells GSE10537: Gene expression profiling of AML1/ETO regulated genes and binding pattern on human promoters in U937 cells GSE10578: AML1/ETO, AML1, and HEB binding patterns on chromosme 19 GSE10579: Analysis of expression levels of genes on chromosome 19 in U937 cells expressing AML1/ETO Keywords: SuperSeries Refer to individual Series

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Transcription profiling of human U937 expressing an inducible AML1-ETO construct - time series

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2009-05-14 | E-GEOD-15647 | biostudies-arrayexpress

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