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EZH2 occupancy profiling by high throughput sequencing from macrophages non-treated (NT) or stimulated with LPS

ABSTRACT: To identify the potential genes that regulated by Ezh2, we immunoprecipitated chromatin from macrophages stimulated with or without LPS, and analyzed the precipitated DNA with deep sequencing (CHIP-Seq).

ORGANISM(S): Mus musculus

PROVIDER: GSE101320 | GEO | 2018/03/15

REPOSITORIES: GEO

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The regulatory roles of Ezh2 in response to lipopolysaccharide (LPS) in macrophages and mice with conditional Ezh2 deletion with LysM-Cre system

Project description:The responses of macrophages to lipopolysaccharide (LPS) might determine the direction of clinical manifestations of sepsis, which is the immune response against severe infection. Meanwhile, the enhancer of zeste homologue 2 (Ezh2), a histone lysine methyltransferase of epigenetic regulation, might interfere with LPS response. With a single LPS stimulation, Ezh2 null(Ezh2flox/flox; LysM-Crecre/−) macrophages demonstrated lower supernatant TNF-α than Ezh2 control (Ezh2fl/fl; LysM-Cre−/−), perhaps due to an upregulation of Socs3, which is a suppressor of cytokine signaling 3, due to the loss of the Ezh2 gene. In LPS tolerance, Ezh2 null macrophages indicated higher supernatant TNF-α and IL-6 than the control, supporting an impact of the loss of the Ezh2 inhibitory gene. In parallel, Ezh2 null mice demonstrated lower serum TNF-α and IL-6 than the control mice after an LPS injection, indicating a less severe LPS-induced hyper-inflammation in Ezh2 null mice. In conclusion, an absence of Ezh2 in macrophages resulted in less severe LPS-induced inflammation, as indicated by low serum cytokines, with less severe LPS tolerance, as demonstrated by higher cytokine production, partly through the upregulated Socs3.

2023-07-20 | PXD041265 | Pride

Expression data from WT and Ezh2-deficient macrophages non-treated (NT) or stimulated for 2 h with LPS

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KDM5B occupancy profiling by CUT&Tag from murine BMDMs untreated (UT) or stimulated with LPS

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Stat6 occupancy profiling by high throughput sequencing from wild-type(WT) or Trim24-deficient(Trim24-KO) mouse peritoneal macrophages stimulated with IL-4 for 1 hour .

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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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CHIP-seq in WT, p53-ko, Ezh2-ko primary macrophages

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EZH2-dependent chromatin accessibility changes during B cell differentiation

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EZH2 is required for gene repression in Plasmablasts

Project description:To understand the role of EZH2 in Plasmablast function EZH2 was inducibly deleted using tamoxifen and B cells stimulated to differentiate with LPS in vivo. After 3 days, CD138+ cells were enriched from the spleens and RNA-seq was performed to identify the genes targeted by EZH2 for repression.

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