Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (ATAC-seq)

ABSTRACT: We examine the epigenetic role of the SWI/SNF Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) in the epithelial response to RSV infection. Wild type and SMARCA4 silenced cells were subjected to ATAC-seq in the absence or presence of RSV infection. Cells were infected for 0 or 24 h prior to RNA seq.

ORGANISM(S): Homo sapiens

PROVIDER: GSE161847 | GEO | 2021/01/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (RNA-seq)

Project description:We examine the epigenetic role of the SWI/SNF Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) in the epithelial response to RSV infection. Wild type and SMARCA4 silenced cells were subjected to short read illumina RNA Seq in the absence or presence of RSV infection. Cells were infected for 0, 16 h or 24 h prior to RNA seq.

2021-01-01 | GSE161846 | GEO

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response

Project description:Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response

| PRJNA679613 | ENA

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-01-01 | GSE161849 | GEO

SMARCA4 regulates BRD4 nuclear distribution in cellular plasticity

Project description:Inducible cell stress programs in basal epithelial cells shape repair and host defense pathways in mucosal surfaces. Previously, we discovered that expression of the core SWI/SNF complex ATPase, SMARCA4/Brg1, is required for genomic organization supporting a fully differentiated epithelial state, regulating cellular plasticity, paracrine mesenchymal signaling and anti-viral response. Here, we observe that SMARCA4 expression is intrinsically engaged with IFN response genes and dynamically engages the atypical histone acetyltransferase, BRD4, upon RSV infection, an association required for intrinsic immunity. To investigate the mechanisms how the SMARCA4 BRD4 complex functions in intrinsic immunity, we performed Cleavage Under Targets and Release Using Nuclease (CUT&RUN) of BRD4 binding in wild type (WT) and SMARCA4 knockdown (KD) small airway epithelial cells in mock- or RSV-infected states. In mock-infected cells, 4,017 high confidence BRD4 peaks are identified that localize to the gene bodies controlling motility programs. By contrast, RSV replication repositions BRD4 to 2,339 regions, upstream of transcription start sites in genes controlling inducible cytokine, cell adherence and anti-viral programs. RSV redistributes BRD4 into super enhancers regulating immune response-associated long noncoding RNAs. BRD4 binding is not affected by SMARCA4 KD in mock-infected cells, but BRD4 recruitment is reduced on 739 peaks after RSV infection, including superenhancers. These data extend the complex interrelationship between the SWI/SNF ATPases and that of the BRD4 bromodomain epithelial progenitors linking cell state and innate immunity.

2024-08-30 | GSE273399 | GEO

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (RNA-seq)

Project description:Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (RNA-seq)

| PRJNA679615 | ENA

Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (ATAC-seq)

Project description:Role of SWI/SNF-Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) core complex in epithelial innate response (ATAC-seq)

| PRJNA679614 | ENA

Project description:Epigenetics plays an important role in the priming the dynamic response of airway epithelial cells to infectious and environmental stressors. Here, we examine the epigenetic role of the SWI/SNF Related, Matrix Associated, Actin Dependent Regulator of Chromatin A4 (SMARCA4) in the epithelial response to RSV infection. Depletion of SMARCA4 destabilized the abundance of the SMARCE1/ARID1A SWI/SNF subunits, disrupting the innate response and triggering a hybrid epithelial/mesenchymal (E/M) state. Assaying SMARCA4 complex-regulated open chromatin domains by transposase cleavage -next generation sequencing (ATAC-Seq), we observed that the majority of cleavage sites in uninfected cells have reduced chromatin accessibility. Paradoxically, SMARCA4 complex-depleted cells showed enhanced RSV-inducible chromatin opening and gene expression in the EMT pathway genes, MMP9, SNAI1/2, VIM, and CDH2. Focusing on the key MMP9, we observed that SMARCA4 complex depletion reduced basal BRD4 and RNA Polymerase II binding, but enhanced BRD4/Pol II binding in response to RSV infection. In addition, we observed that MMP9 secretion in SMARCA4 complex deficient cells contributes to mesenchymal transition, cellular fusion (syncytia) and subepithelial myofibroblast transition. We conclude the SMARCA4 complex is a transcriptional repressor of epithelial plasticity, whose depletion triggers a hybrid E/M state that affects the dynamic response of the small airway epithelial cell in mucosal remodeling via paracrine MMP9 activity.

| S-EPMC7957062 | biostudies-literature

SWI/SNF chromatin remodeling subunit Smarca4/BRG1 is essential for female fertility†.

Project description:Mammalian folliculogenesis is a complex process that involves the regulation of chromatin structure for gene expression and oocyte meiotic resumption. The SWI/SNF complex is a chromatin remodeler using either Brahma-regulated gene 1 (BRG1) or BRM (encoded by Smarca4 and Smarca2, respectively) as its catalytic subunit. SMARCA4 loss of expression is associated with a rare type of ovarian cancer; however, its function during folliculogenesis remains poorly understood. In this study, we describe the phenotype of BRG1 mutant mice to better understand its role in female fertility. Although no tumor emerged from BRG1 mutant mice, conditional depletion of Brg1 in the granulosa cells (GCs) of Brg1fl/fl;Amhr2-Cre mice caused sterility, whereas conditional depletion of Brg1 in the oocytes of Brg1fl/fl;Gdf9-Cre mice resulted in subfertility. Recovery of cumulus-oocyte complexes after natural mating or superovulation showed no significant difference in the Brg1fl/fl;Amhr2-Cre mutant mice and significantly fewer oocytes in the Brg1fl/fl;Gdf9-Cre mutant mice compared with controls, which may account for the subfertility. Interestingly, the evaluation of oocyte developmental competence by in vitro culture of retrieved two-cell embryos indicated that oocytes originating from the Brg1fl/fl;Amhr2-Cre mice did not reach the blastocyst stage and had higher rates of mitotic defects, including micronuclei. Together, these results indicate that BRG1 plays an important role in female fertility by regulating granulosa and oocyte functions during follicle growth and is needed for the acquisition of oocyte developmental competence.

| S-EPMC9930400 | biostudies-literature

SWI/SNF Subunits SMARCA4, SMARCD2 and DPF2 Collaborate in MLL-Rearranged Leukaemia Maintenance.

Project description:Alterations in chromatin structure caused by deregulated epigenetic mechanisms collaborate with underlying genetic lesions to promote cancer. SMARCA4/BRG1, a core component of the SWI/SNF ATP-dependent chromatin-remodelling complex, has been implicated by its mutational spectrum as exerting a tumour-suppressor function in many solid tumours; recently however, it has been reported to sustain leukaemogenic transformation in MLL-rearranged leukaemia in mice. Here we further explore the role of SMARCA4 and the two SWI/SNF subunits SMARCD2/BAF60B and DPF2/BAF45D in leukaemia. We observed the selective requirement for these proteins for leukaemic cell expansion and self-renewal in-vitro as well as in leukaemia. Gene expression profiling in human cells of each of these three factors suggests that they have overlapping functions in leukaemia. The gene expression changes induced by loss of the three proteins demonstrate that they are required for the expression of haematopoietic stem cell associated genes but in contrast to previous results obtained in mouse cells, the three proteins are not required for the expression of c-MYC regulated genes.

| S-EPMC4646637 | biostudies-literature

siRNA Knockdown of SWI/SNF complex proteins in prostate cancer cell lines

Project description:Here we performed transcriptional profiling of the prostate cancer cell lines LNCaP and 22Rv1 comparing non-targeting siRNA treatment versus siRNAs targeting SWI/SNF complex proteins (SMARCA2, SMARCA4, and SMARCB1). Goal was to determine the effect of SWI/SNF knockdown on gene expression in prostate cancer. Two-condition experiment: non-targeting siRNA versus SWI/SNF-siRNA treated cells. Three SWI/SNF proteins were targeted: SMARCA2, SMARCA4, and SMARB1. Biological replicates: 1 control replicate, 2 treatment replicates per SWI/SNF protein. Technical replicates: 1 replicate per SWI/SNF protein. Cell lines: 22Rv1 and LNCaP.

2013-07-20 | E-GEOD-40384 | biostudies-arrayexpress