E-GEOD-30076
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: PRJNA149953PRJNA144097
PROVIDER: E-GEOD-30076 | ExpressionAtlas | 2014-07-03
REPOSITORIES: ExpressionAtlas
Similar Datasets
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
2012-03-15 | E-GEOD-29997 | biostudies-arrayexpress
Project description:Dicer conditional knockout embryonic heart mutant vs control array
| PRJNA100449 | ENA
Project description:The Enhancer of Zeste 2 Polycomb Repressive Complex 2 Subunit (EZH2) is an essential epigenetic modifier able to methylate lysine 27 on histone H3 (H3K27) to induce chromatin compaction, protein complex recruitment and ultimately transcriptional repression. Hematologic malignancies, including Diffuse Large B cell lymphoma (DLBCL) and Acute myeloid leukemia (AML) have shown a high EZH2-mutation frequency (>20%) associated with poor clinical outcomes. Particularly, two distinct oncogenic mutations, so-called gain-of-function (Y641F and A677G) and loss-of-function (H689A and F667I) are found in the catalytic domain of EZH2. In this study, a comprehensive multi-omics approach was employed to characterize downstream effects of H3K27me3 deposition driven by EZH2 mutations. Human embryonic kidney cells (HEK293T) were transfected to generate three stable EZH2 mutants: EZH2(Y641F), EZH2(A677G), and EZH2(H689A/F667I), which were validated via immunoblotting and DIA-MS-based histone profiling assay. The histone profiling assay demonstrated a significant increase of approximately two-fold in H3.1/H3.3K27me3 for Y641F EZH2 mutant. There was a modest increase in the combinatorial PTMs H3.1/H3.3K27me3K36me1 and a significant depletion in H3.1 and H3.3 K27me2. The most depleted peptide was H3.3K27me2K36me2. For the A677G EZH2 mutant, the assay demonstrated an enrichment on H3.1/H3.3K27me3, combinatorial K27me3K36me1 and a slight increase in K27me1 and K18ac but only on H3.1. The most depleted peptide was H3.3K27me2K36me2. The H689A/F667I cell line has the most alterations in global histone PTMs. The most highly enriched were H3.1/H3.3K36me2, H3.1K9me3 and H3.3K36me1. The most depleted modifications were H3.1K23ac and H3.1K27me3.
2023-10-24 | PXD042953 | Pride
Project description:Congenital heart disease is among the most frequent major birth defects. Epigenetic marks are crucial for organogenesis, but their role in heart development is poorly understood. Polycomb Repressive Complex 2 (PRC2) trimethylates histone H3 at lysine 27, establishing H3K27me3 repressive epigenetic marks that promote tissue-specific differentiation by silencing ectopic gene programs. We studied the function of the catalytic subunit of PRC2, EZH2, in murine heart development. Early EZH2 inactivation by Nkx2-5Cre caused lethal congenital heart malformations, but slightly later EZH2 inactivation by cTNT-Cre did not. To study how the cardiomyocytes gene expression program is properly established in the early heart development, we combined the technologies of RNA sequencing and chromatin immunoprecipitation sequencing to identify the functional target genes directly repressed by EZH2. Intriguingly, these were enriched for transcriptional regulators of non-cardiac expression programs, such as transcription factors that regulate neuronal (Pax6) and cardiac progenitor genes (Isl1 and Six1). EZH2 was also required to maintain spatiotemporal regulation of cardiac gene expression, as Hcn4, Mlc2a, and Bmp10 were inappropriately upregulated in ventricular RNA. Furthermore, EZH2 was required for normal cardiomyocyte proliferation, establishing H3K27me3 epigenetic marks at cell cycle inhibitors Ink4a/b and repressing their expression. Our study reveals a previously undescribed role of EZH2 in regulating heart formation and shows that perturbation of the epigenetic landscape early cardiogenesis has sustained disruptive effects at later developmental stages. 8 E12.5 heart apex were used for RNA preparation each group.
2012-03-15 | E-GEOD-29992 | biostudies-arrayexpress
Project description:As a master regulator of chromatin structure and function, the EZH2 lysine methyltransferase orchestrates transcriptional silencing of developmental gene networks. Overexpression of EZH2 is commonly observed in human epithelial cancers, such as non- small cell lung carcinoma (NSCLC), yet definitive demonstration of malignant transformation by deregulated EZH2 has proven elusive. Here, we demonstrate the causal role of EZH2 overexpression in NSCLC with a new genetically-engineered mouse model of lung adenocarcinoma. Deregulated EZH2 silences normal developmental pathways leading to epigenetic transformation independent from canonical growth factor pathway activation. As such, tumors feature a transcriptional program distinct from KRAS- and EGFR-mutant mouse lung cancers, but shared with human lung adenocarcinomas exhibiting high EZH2 expression. To target EZH2-dependent cancers, we developed a novel and potent EZH2 inhibitor that arises from a facile synthesis and possesses improved pharmacologic properties. JQEZ5 promoted the regression of EZH2-driven tumors in vivo, confirming oncogenic addiction to EZH2 in established tumors and providing the rationale for epigenetic therapy in a defined subset of lung cancer. ChIP-Seq for H3K27ac and H3K27me3 in murine normal and EZH2 overexpressed tumor lung tissue
2015-11-01 | E-GEOD-70045 | biostudies-arrayexpress
Project description:Transcription array by profiling in WT and SRC-2 null mouse liver
| PRJNA238224 | ENA
Project description:This SuperSeries is composed of the following subset Series: GSE40970: ChIP-seq analysis of H3K27me3 histone modification in EZH2 mutant and wild type DLBCL cell lines GSE40971: Gene expression profiling of EZH2 mutant and wild type DLBCL cell lines treated with EZH2 inhibitor GSE41239: Gene expression profiling of two DLBCL cell lines upon shRNA mediated knockdown of EZH2 Refer to individual Series
2012-10-12 | E-GEOD-40972 | biostudies-arrayexpress
Project description:Ezh2 and H3K27me3 binding sites in E12.5 heart apex PRC2 binding sites in wild type cardiomyocytes
2012-03-15 | E-GEOD-29994 | biostudies-arrayexpress