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Phased gene expression and chromatin accessibility during progressive EMT and MET linked to dynamic CTCF engagement (RNA-Seq)

ABSTRACT: We report the chromatin accessibility alterations and gene expression changes in TGFB-induced and -withdrawn reversible EMT in MCF10A mammary epithelial cells

ORGANISM(S): Homo sapiens

PROVIDER: GSE145850 | GEO | 2020/12/01

REPOSITORIES: GEO

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	GSE145850_Rep1_log2FPKM.txt.gz	Txt
	GSE145850_Rep2_FPKM.txt.gz	Txt

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Phased gene expression and chromatin accessibility during progressive EMT and MET linked to dynamic CTCF engagement (ATAC-Seq)

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RAVER1 interconnects lethal EMT and miR/RISC activity by the control of alternative splicing

Project description:The RAVER1 protein was proposed to serve as a co-factor in guiding the PTBP-dependent control of alternative splicing (AS). Whether RAVER1 solely acts in concert with PTBPs and how it affects cancer cell fate remained elusive. Here we provide the first comprehensive investigation of RAVER1-controlled AS in cancer cell models and reveal a pro-oncogenic role of RAVER1 in tumor growth. This unravels that RAVER1 guides AS in synergy with PTBPs but more prominently serves PTBP1-independent roles in splicing. In cancer cells, one major function of RAVER1 is the control of proliferation and apoptosis, which involves the modulation of AS events within the miR/RISC pathway. Associated with this regulatory role, RAVER1 antagonizes lethal, TGFB-driven epithelial-mesenchymal-transition (EMT) by limiting TGFB signaling. RAVER1-modulated splicing events affect the insertion of protein interaction modules in factors guiding miR/RISC-dependent gene silencing. Most prominently, in all three human TNRC6 proteins, RAVER1 controls AS of GW-enriched motifs, which are essential for AGO2-binding. Disturbance of RAVER1-guided AS events in TNRC6 proteins and other facilitators of miR/RISC activity compromise miR/RISC activity which is essential to restrict TGFB signaling and lethal EMT.

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