Similar Datasets
Project description:ChIPseq and RNAseq analysis of T47D cells with/without silencing TRPS1/CHD4
| PRJNA470671 | ENA
Project description:Glioblastomas (GBM) harbor subpopulations of therapy-resistant tumor initiating cells (TICs) that are self-renewing and multipotent. To understand the regulation of the TIC state, we performed an image-based screen for genes regulating GBM TIC maintenance and identified ZFHX4, a 397-kDa transcription factor. ZFHX4 is required to maintain TIC-associated phenotypes in vitro, suggesting that ZFHX4 regulates TIC differentiation, and its suppression increases glioma-free survival in intracranial xenografts. ZFHX4 interacts with CHD4, a core member of the NuRD (nucleosome remodeling and deacetylase) complex. ZFHX4 and CHD4 bind to overlapping sets of genomic loci and control similar gene expression programs. Using expression data derived from GBM patients, we demonstrate ZFHX4 is a master regulator of CHD4-mediated gene expression. These observations define ZFHX4 as a regulatory factor that links the chromatin remodeling NuRD complex and the GBM TIC state. Examination of binding of ZFHX4 and CHD4 across the human genome, using the 0308 tumor initiating cell line. Two replicates for each protein, compared to whole cell extract inputs.
2014-01-16 | E-GEOD-52419 | biostudies-arrayexpress
Project description:We reported the transcriptional regulation function and mechanism of TRPS1.
2021-05-30 | GSE115126 | GEO
Project description:The aim of this research was to confirm the regulatory effect of TRPS1 on gene expression in the development of breast cancer.
2018-11-19 | GSE104062 | GEO
Project description:CHD (chromodomain helicase DNA binding protein) family is composed of nine members of chromatin remodeling factors that regulate chromatin structure in an ATP-dependent manner. Among them, CHD4 contributes to many basic cellular functions during development mainly through multiple proteins interacting with CHD4 including NuRD (nucleosome remodeling and deacetylase activities) complex, which contains histone deacetylase HDAC1/2. However, functions of CHD4 that are not mediated by NuRD complexes have also been found, implying the existence of unknown proteins that are associated with CHD4. In the present study, we generated CHD4 FLAG-tag knock-in cells in HeLa-S3 and HEK293T cells and sought proteins bound to CHD4 with the use of immunoprecipitation and liquid chromatography and tandem MS (LC-MS/MS) analysis. We found that LCORL (ligand dependent nuclear receptor corepressor like) and NOL4L (nucleolar protein 4 like) were reproducibly identified as a novel CHD4 interactors. RNA-sequencing analysis of HEK293T cells depleted of CHD4, LCORL, and NOL4L revealed consistent upregulation of genes related to the Notch pathway. Our results thus suggest that both NOL4L and LCORL may cooperate with CHD4 to suppress the Notch pathway in mammalian cells.
2022-01-01 | GSE190369 | GEO
Project description:Lineage specification of the three germ layers occurs during early embryogenesis and is critical for normal development. The nucleosome remodeling and deacetylase (NuRD) complex is a repressive chromatin modifier that plays a role in lineage commitment. However, the role of chromodomain helicase DNA-binding protein 4 (CHD4), one of the core subunits of the NuRD complex, in neural lineage commitment is poorly understood. Here, we report that the CHD4/NuRD complex plays a critical role in neural differentiation of mouse embryonic stem cells (ESCs). We found that RNAi-mediated Chd4 knockdown suppresses neural differentiation, as did knockdown of methyl-CpG binding domain protein Mbd3, another NuRD subunit. Chd4 and Mbd3 knockdowns similarly affected changes in global gene expression during neural differentiation and up-regulated several mesendodermal genes. However, inhibition of mesendodermal genes by knocking out the master regulators of mesendodemal lineages, Brachyury and Eomes, through a CRISPR/Cas9 approach could not restore the impaired neural differentiation caused by the Chd4 knockdown, suggesting that CHD4 controls neural differentiation not by repressing other lineage differentiation processes. Notably, Chd4 knockdown increased the acetylation levels of p53, resulted in increased protein levels of p53. Double knockdown of Chd4 and p53 restored the neural differentiation rate. Furthermore, overexpression of BCL2, a downstream factor of p53, partially rescued the impaired neural differentiation caused by the Chd4 knockdown. Our findings reveal that the CHD4/NuRD complex regulates neural differentiation of ESCs by down-regulating p53.
2018-11-07 | GSE114389 | GEO
Project description:Fibrosis, characterized by sustained activation of myofibroblasts and excessive extracellular matrix (ECM) deposition, is known to be associated with chronic inflammation. RIPK3, a key kinase mediating TNF-driven necroptosis signaling, is upregulated in fibrosis and contributes to the TNF-mediated inflammation. In bile duct ligation-induced liver fibrosis, we found that myofibroblasts are the major cell type expressing RIPK3. Genetic ablation of beta1 integrins, the major profibrotic ECM receptors in fibroblasts, not only abolished ECM fibrillogenesis but also blunted RIPK3 expression via an epigenetic mechanism mediated by the chromatin remodeling factor CHD4. While the function of CHD4 has been conventionally linked to NuRD and ChAHP complexes, we found that CHD4 potently repressed a set of genes, including Ripk3, with high locus specificity but independent of either the NuRD or ChAHP complex. Thus, our data uncover that beta1 integrin intrinsically links fibrotic signaling to RIPK3-driven inflammation via a novel mode of action of CHD4.
2023-10-30 | PXD041505 | Pride
Project description:The goal of this study was to explore in detail how the chromatin remodeler and NuRD subunit CHD4 controls the oncogenic signature of the tumor driver and fusion protein PAX3-FOXO1 in fusion-positive rhabdomyosarcoma. To this aim, we defined the interactome of CHD4 by LC-MS, identified its location in the genome by ChIP-seq, assessed its influence on DNA accessibility by DNase I hypersensitivity assays, and determined its target genes by RNA-seq.
2020-08-11 | PXD015231 | Pride
Project description:ATP-dependent chromatin remodelers modulate gene expression by regulating genome accessibility and can contribute to tumorigenesis. In fusion-positive rhabdomyosarcoma (FP-RMS), we have previously identified the chromatin remodeler and NuRD subunit CHD4 as an essential gene for tumor survival. Here, we demonstrate that the FP-RMS vulnerability to CHD4 goes beyond its function as a NuRD member. Mechanistically, CHD4 interacts with BRD4 and co-localizes with the tumor driver and fusion protein PAX3-FOXO1 at super-enhancers where it generates a chromatin architecture permissive for the binding of the fusion protein. This allows the positioning of RNA polymerase 2 at promoters and the expression of the oncogenic program of PAX3-FOXO1. Additionally, analysis of genome-wide cancer dependency databases identifies CHD4 amongst the NuRD subunits as general novel cancer vulnerability. Our findings describe, for the first time, CHD4 as a regulator of super-enhancer-mediated gene expression and establish this chromatin remodeler as an unexpected broad tumor susceptibility.
2020-08-08 | GSE155861 | GEO
Project description:ATP-dependent chromatin remodelers modulate gene expression by regulating genome accessibility and can contribute to tumorigenesis. In fusion-positive rhabdomyosarcoma (FP-RMS), we have previously identified the chromatin remodeler and NuRD subunit CHD4 as an essential gene for tumor survival. Here, we demonstrate that the FP-RMS vulnerability to CHD4 goes beyond its function as a NuRD member. Mechanistically, CHD4 interacts with BRD4 and co-localizes with the tumor driver and fusion protein PAX3-FOXO1 at super-enhancers where it generates a chromatin architecture permissive for the binding of the fusion protein. This allows the positioning of RNA polymerase 2 at promoters and the expression of the oncogenic program of PAX3-FOXO1. Additionally, analysis of genome-wide cancer dependency databases identifies CHD4 amongst the NuRD subunits as general novel cancer vulnerability. Our findings describe, for the first time, CHD4 as a regulator of super-enhancer-mediated gene expression and establish this chromatin remodeler as an unexpected broad tumor susceptibility.
2019-12-20 | GSE140115 | GEO