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EZH2 and H3K27me3 ChIP-seq in E14 mouse embryonic stem cells harboring wildtype or mutant EZH2.

ABSTRACT: We report the occupancy and catalysis of wildtype and allosteric activation-decifient mutants of EZH2 in E14 mESC by ChIP-seq.

ORGANISM(S): Mus musculus

PROVIDER: GSE111433 | GEO | 2018/03/06

REPOSITORIES: GEO

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EZH2 and H3K27me3 ChIP-seq in E14 mouse embryonic stem cells harboring wildtype or mutant EZH2.

Project description:EZH2 and H3K27me3 ChIP-seq in E14 mouse embryonic stem cells harboring wildtype or mutant EZH2.

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ChIP-seq for PRC2 components and H3K27me3 in E14 mouse embryonic stem cells

Project description:This experiment sought to determine the chromatin structure and PRC2 occupancy at the promoters of all genes in mouse ESCs ChIP-seq for EZH2, SUZ12, and H3K27me3 were performed on WT E14 cells in 2 biological replicates each. In addition H3K27me3 ChIP-seq was also performed on a clone of E14 cells expressing a tagged version of EZH2, which for the purpose of this study was used as replicate #3.

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Transcriptome profiling of WT and Hbxip-KO E14 ESCs in pluripotent condition and during differentiation

Project description:To gain more insights about the role of Hbxip in mESC, we performed RNA-Seq for WT and Hbxip-KO E14 ESCs in pluripotent condition and during differentiation. The goals of this study are to compare the transcriptome changes upon Hbxip knockout in pluripotent condition and during differentiation.

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Affinify Purification of EZH2 and phosphodeficient EZH2 identifies phosphorylation dependent interactions of EZH2

Project description:Overexpression of EZH2 in estrogen receptor negative (ER-) breast cancer promotes metastasis. EZH2 has been mainly studied as the catalytic component of the Polycomb Repressive Complex 2 (PRC2) that mediates gene repression by trimethylating histone H3 at lysine 27 (H3K27me3). However, how EZH2 drives metastasis despite the low H3K27me3 levels observed in ER- breast cancer is unknown. We have shown that in human invasive carcinomas and distant metastases, cytoplasmic EZH2 phosphorylated at T367 is significantly associated with ER- disease and low H3K27me3 levels. Here, we explore the interactome of EZH2 and of a phosphodeficient mutant EZH2_T367A. We identified novel interactors of EZH2, and identified interactions that are dependent on the phosphorylation and cellular localization of EZH2 that may play a role in EZH2 dependent metastatic progression.

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Genome-wide analysis of H3K27me3 in Ezh2-conditional iMEFs

Project description:We analyzed the genomic distribution of H3K27me3 in a clone of c-Myc iMEFs (clone C2) either i) wild-type for Ezh2, ii) in the presence of overexpressed exogenous Ezh2, iii) Ezh2-mutant, and iv) Ezh1/Ezh2 pre-deletion (Ezh1/Ezh2 introduced before deletion of endogenous Ezh2) and Ezh2 post-deletion rescue (Ezh2 re-introduced in Ezh2-mutant cells).

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Ezh2 and H3K27me3 in cardiomyocytes

Project description:This SuperSeries is composed of the following subset Series: GSE29992: Genome-wide profiling of E12.5 cardiomyocytes RNA expression in both hetozygeous control and mutant GSE29994: ChIP-seq of Ezh2 and H3K27me3 in E12.5 heart apex Refer to individual Series

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EZH2-mediated H3K27me3 targets transcriptional circuits of neuronal differentiation

Project description:Our work describes novel roles for EZH2 in the specification of cortical neurons. Previous reports established the current model of EZH2-mediated control of neuronal progenitors differentiation through the regulation of their proliferation and developmental transitions. We built on these findings and studied the role of EZH2 in post-mitotic glutamatergic neurons differentiated from embryonic stem cells, a particularly relevant cell type where the impact of its regulation has thus far remained elusive. Briefly, our key results can be summarized as follows: 1. The conditional deletion of EZH2 at the moment of cell cycle exit in neural progenitors allowed us to study the role of EZH2 selectively in post-mitotic glutamatergic neurons. 2. Time course transcriptomic and epigenomic analyses of H3K27me3 in absence of EZH2 revealed a significant dysregulation of transcriptional networks affecting synaptic plasticity, in particular long term depression. 3. These analyses also revealed potential novel roles of EZH2 in controlling the regulation between the glutamatergic signature and the GABAergic one, suggesting a mechanism entailing failure of Prdm13 repression, a histone methyltransferase with a known role in determining GABAergic neurons specification.

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EZH2-H3K27me3 mediated KRT14 upregulation promotes TNBC peritoneal metastasis

Project description:Triple-Negative Breast Cancer (TNBC) has a poor prognosis and adverse clinical outcomes among all breast cancer subtypes as there is no available targeted therapy. Overexpression of Enhancer of zeste homolog 2 (EZH2) has been shown to correlate with TNBC's poor prognosis, but the contribution of EZH2 catalytic (H3K27me3) versus non-catalytic EZH2 (NC-EZH2) function in TNBC progression remains elusive. We reveal that selective hyper-activation of functional EZH2 (H3K27me3) over NC-EZH2 alters TNBC metastatic landscape and fosters its peritoneal metastasis, particularly splenic. Instead of H3K27me3-mediated repression of gene expression; here, it promotes KRT14 transcription by attenuating binding of repressor Sp1 to its promoter. Further, KRT14 loss significantly reduces TNBC migration, invasion, and peritoneal metastasis. Consistently, human TNBC metastasis displays positive correlation between H3K27me3 and KRT14 levels. Finally, EZH2 knockdown or H3K27me3 inhibition by EPZ6438 reduces TNBC peritoneal metastasis. Altogether, our preclinical findings suggest a rationale for targeting TNBC with EZH2 inhibitors.

2022-11-10 | GSE217474 | GEO

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