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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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ChIP-seq of EGR1 in human primary unstimulated monocytes and in unstimulated human monocytes from three CMML patients

ABSTRACT: Identification of EGR1 chromatin localization in human primary monocytes (2 donors), in human primary monocytes from 2 CMML patients with TET2 truncating mutations (high VAF) and in human primary monocytes from 1 CMML patients with TET2 truncating mutations with low VAF.

INSTRUMENT(S): Illumina HiSeq 2000

ORGANISM(S): Homo sapiens

SUBMITTER: Nathalie Droin

PROVIDER: E-MTAB-11132 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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ChIP-seq of CSF-1R, H3K4me1, H3K4me3 in human primary unstimulated monocytes and monocytes differentiated 72h with CSF-1 (3 healthy donors buffy coat) and in monocytes from two CMML patients and one healthy donor, EGR1 ChIP-seq in unstimulated monocytes (3 healthy donors buffy coat)

Project description:Identification of nuclear CSF-1R, H3K4me1 and H3K4me3 localization on chromatin in human primary monocytes and modification of this localization during monocyte differentiation into macrophage induced by 100ng/mL CSF-1 during 6 hours (1 donor) or 72h (3 donors). Identification of EGR1 chromatin localization in human primary monocytes (3 donors) Comparison of nuclear CSF-1R chromatin localization in monocytes from 1 healthy donor and 2 chronic myelomonocytic leukemia patients.

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ChiP-seq of H3K4me3 in primary unstimulated monocytes from 3 healthy donors buffy coats and from 4 CMML patients

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ChIP-seq of CSF-1R in THP-1 cell lines deleted for EGR1 gene by CRISPR-Cas9 and ChIP-seq of CSF-1R in 2 CMML patients

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ChIP-seq of EGR1 in human primary unstimulated monocytes and in unstimulated human monocytes from three CMML patients

Project description:ChIP-seq of EGR1 in human primary unstimulated monocytes and in unstimulated human monocytes from three CMML patients

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Macrophage migration inhibitory factor is overproduced through EGR1 in TET2low resting monocytes

Project description:Somatic mutation in TET2 gene is one of the most common clonal genetic events detected in age-related clonal hematopoiesis as well as in chronic myelomonocytic leukemia (CMML). In addition to being a pre-malignant state, TET2 mutated clones are associated with an increased risk of death from cardiovascular disease, which could involve cytokine/chemokine overproduction by monocytic cells. Here, we show in mice and in human cells that, in the absence of any inflammatory challenge, TET2 down-regulation promotes the production of MIF (macrophage migration inhibitory factor), a pivotal mediator of atherosclerotic lesion formation. In healthy monocytes, TET2 is recruited to MIF promoter and interacts with the transcription factor EGR1 and histone deacetylases. Disruption of these interactions as a consequence of TET2-decreased expression favors EGR1-driven transcription of MIF gene and its secretion. MIF favors monocytic differentiation of myeloid progenitors. These results designate MIF as a chronically overproduced chemokine and a potential therapeutic target in patients with clonal TET2 down-regulation in myeloid cells.

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TET2 mutations are associated with specific methylation profiles in patients with Chronic Myelomonocytic Leukemia

Project description:Chronic myelomonocytic leukemia (CMML) has recently been associated with a high incidence of diverse mutations in genes implicated in epigenetic mechanisms such as TET2 or EZH2. We have performed genome-wide methylation arrays and mutational analysis of TET2, IDH1, IDH2, EZH2 and JAK2 in a group of 24 patients with CMML. 249 genes were differentially methylated between CMML patients and controls. Using Ingenuity pathway analysis enrichment in a gene network centered in PLC, JNK and ERK, a recently described pathway involved in CMML was found, suggesting the potential role of epigenetics in the regulation of these pathways. Mutations of TET2, JAK2 and EZH2 were found in 15 patients (65.2%), 4 patients (16.6%) and 1 patient (4.1%) respectively while no mutations in the IDH1 and IDH2 genes were identified. Interestingly, patients with wild type TET2 clustered separately from patients with TET2 mutations, showed a higher degree of hypermethylation and were associated with the presence of altered karyotypes a known prognostic factor in CMML. Our results demonstrate the presence of aberrant DNA methylation in CMML and identifies TET2 mutant CMML as a biologically distinct disease subtype with a different epigenetic profile. 24 samples of CMML patients, 4 healthy donor Peripheral Blood samples and 4 healthy donor Bone Marror samples

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5-hydroxymethylcytosine marks promoters in colon that resist hypermethylation in cancer [seq]

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