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SWI/SNF component ARID1A restrains pancreatic neoplasia formation [RNA-seq]

ABSTRACT: SWI/SNF component ARID1A restrains pancreatic neoplasia formation [RNA-seq]

PROVIDER: PRJNA490279 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7817610.fastq.gz	Fastqsanger.gz
	SRR7817603.fastq.gz	Fastqsanger.gz
	SRR7817604.fastq.gz	Fastqsanger.gz
	SRR7817605.fastq.gz	Fastqsanger.gz
	SRR7817606.fastq.gz	Fastqsanger.gz

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SWI/SNF component ARID1A restrains pancreatic neoplasia formation

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SWI/SNF component ARID1A restrains pancreatic neoplasia formation [ChIP-seq]

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SWI/SNF component ARID1A restrains pancreatic neoplasia formation [ChIP-seq]

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SWI/SNF component ARID1A restrains pancreatic neoplasia formation [RNA-seq]

Project description:ARID1A restrains the formation of PanIN, pancreas ductal adenocarcinoma, and intraductal mucinous neoplasms

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SWI/SNF component ARID1A restrains pancreatic neoplasia formation

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Suppression of SWI/SNF component Arid1a promotes mammalian regeneration through chromatin remodeling

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Arid1a restrains Kras-dependent changes in acinar cell identity

Project description:Mutations in members of the SWI/SNF chromatin remodeling family are common events in human cancer, but the mechanisms whereby disruption of SWI/SNF components alters tumorigenesis remain poorly understood. To model the effect of loss of function mutations in the SWI/SNF subunit Arid1a in pancreatic ductal adenocarcinoma (PDAC) initiation, we directed shRNA triggered, inducible and reversible suppression of Arid1a to the pancreas of mice in the setting of oncogenic KrasG12D. Arid1a cooperates with Kras in the adult pancreas as postnatal silencing of Arid1a following sustained KrasG12D expression induces rapid and irreversible reprogramming of acinar cells into mucinous PDAC precursor lesions. In contrast, Arid1a silencing during embryogenesis, concurrent with KrasG12D activation, leads to retention of acinar cell fate. Together, our results demonstrate Arid1a as a critical modulator of Kras-dependent changes in acinar cell identity, and underscore an unanticipated influence of timing and genetic context on the effects of SWI/SNF complex alterations in epithelial tumorigenesis.

2018-07-03 | GSE114576 | GEO

Arid1a restrains Kras-dependent changes in acinar cell identity

2018-07-03 | GSE114567 | GEO

ARID-DNA interactions are essential for SWI/SNF function

Project description:Every known SWI/SNF chromatin-remodeling complex incorporates an ARID DNA binding domain-containing subunit. Despite being a ubiquitous component of these complexes, physiological roles for this domain remain undefined. We screened an N-ethyl-N-nitrosurea (ENU) mutagenized library for ARID domain point mutations and generated an Arid1a/Baf250a hypomorphic allele. The mutant ARID1a (V1068G) protein is stably expressed at wild-type levels, and it is capable of assembling into a SWI/SNF complex with in vitro mononucleosome disruption activity. However, its capacity to bind DNA is lost. Consistent with defective DNA binding, mutant protein occupancy at known SWI/SNF target genes is decreased. Loss of DNA binding is associated with concurrent changes in SWI/SNF target gene expression. Mutant embryos manifest heart defects, fail to establish proper yolk sac vasculature, and exhibit hemorrhaging. As a result of these phenotypes, mutant embryos fail to establish proper circulation, culminating in ischemic arrest in utero between days 9.5 and 11.5. These data support a role for ARID1a-containing, BAF-A complexes in heart and extraembryonic vascular development, and indicate the ARID domain of ARID1a is essential in this regard. Hence, intrinsic ARID subunit-DNA interactions are required for normal SWI/SNF function in vivo. Four-condition experiment, wild-type vs Baf250a/Arid1a^V1068G/V1068G yolk sacs isolated at E8.5 and E9.5. Biological replicates: 3 per condition.

2012-01-15 | E-GEOD-32116 | biostudies-arrayexpress

ChIP-seq analysis of Arid1a and C/ebpÎ± in the mouse livers

Project description:Arid1a is the subunit of SWI/SNF complex, which was reported to guide SWI/SNF to DNA. Here, we found that loss of Arid1a in the liver and other adult tissues results in improved organ regeneration. Within SWI/SNF complexes, Arid1a physically interacts with C/ebpÎ±, a hepatocyte transcription factor that drives maturation and limits proliferation. Genome-wide analysis showed that loss of Arid1a reduces the recruitment and activity of C/ebpÎ± on target promoters, resulting in expression programs that favor regeneration and cellular fitness during injury. Arid1a binding is enriched in promoters near transcriptional start sites (TSSs), and C/ebpÎ± binds at precisely the same positions, indicating that Arid1a facilitates C/ebpÎ± binding across the genome. Perfuse and isolate primary hepatocytes from mice livers, analysis of genomic occupancy of C/ebpÎ± and H3K4me2 in hepatocytes from Arid1a WT and Arid1a liver specific KO mice by ChIP-seq. Analysis of genomic occupancy of Arid1a in the hepatocytes from V5-Arid1a transgenic mouse by ChIP-seq.

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