Transcriptomics,Genomics

Dataset Information

154

ARID1A loss impairs enhancer-mediated gene regulation and drives colon cancer in mice [primary cells_RNA-seq]


ABSTRACT: Genes encoding subunits of SWI/SNF chromatin remodeling complexes are collectively mutated in ~20% of all human cancers. Although ARID1A is the most frequent target of mutations, the mechanism by which its inactivation promotes tumorigenesis is unclear. Here, we demonstrate that Arid1a functions as a tumor suppressor in the mouse colon, but not the small intestine, and that invasive ARID1A-deficient adenocarcinomas resemble human colorectal cancer (CRC). These tumors lack deregulation of APC/beta-catenin, crucial gatekeepers in common forms of intestinal cancer. ARID1A normally targets SWI/SNF complexes to enhancers, where they function in coordination with transcription factors (TFs) to facilitate gene activation. ARID1B preserves SWI/SNF function in ARID1A-deficient cells, but defects in SWI/SNF targeting and control of enhancer activity cause extensive dysregulation of gene expression. These findings represent an advance in colon cancer modeling and implicate enhancer-mediated gene regulation as a principal tumor suppressor function of ARID1A. Overall design: RNA-seq in Primary Colon Epithelial cells form WT and ARID1A-KO mice.

INSTRUMENT(S): Illumina HiSeq 2000 (Mus musculus)

SUBMITTER: Peter J Park  

PROVIDER: GSE71513 | GEO | 2016-11-21

SECONDARY ACCESSION(S): PRJNA291420

REPOSITORIES: GEO

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Publications

ARID1A loss impairs enhancer-mediated gene regulation and drives colon cancer in mice.

Mathur Radhika R   Alver Burak H BH   San Roman Adrianna K AK   Wilson Boris G BG   Wang Xiaofeng X   Agoston Agoston T AT   Park Peter J PJ   Shivdasani Ramesh A RA   Roberts Charles W M CW  

Nature genetics 20161212 2


Genes encoding subunits of SWI/SNF (BAF) chromatin-remodeling complexes are collectively mutated in ∼20% of all human cancers. Although ARID1A is the most frequent target of mutations, the mechanism by which its inactivation promotes tumorigenesis is unclear. Here we demonstrate that Arid1a functions as a tumor suppressor in the mouse colon, but not the small intestine, and that invasive ARID1A-deficient adenocarcinomas resemble human colorectal cancer (CRC). These tumors lack deregulation of AP  ...[more]

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