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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [RNA-seq]

ABSTRACT: Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [RNA-seq]

PROVIDER: PRJNA544088 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11207341_1.fastq.gz	Fastqsanger.gz
	SRR11207341_2.fastq.gz	Fastqsanger.gz
	SRR11207342_1.fastq.gz	Fastqsanger.gz
	SRR11207342_2.fastq.gz	Fastqsanger.gz
	SRR11207343_1.fastq.gz	Fastqsanger.gz

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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes

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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [ChIP-seq]

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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [Hi-C]

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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [ChIP-seq]

Project description:STAG2 encodes a cohesin component and is frequently mutated in myeloid neoplasms, showing highly significant co-mutation patterns with other drivers, including RUNX1. However, the molecular basis of cohesin-mutated leukemogenesis remains poorly understood. Here we show a critical role of an interplay between Stag2 and Runx1 in the regulation of enhancer-promoter looping and transcription in hematopoiesis. Combined loss of Stag2 and Runx1, which co-localize at enhancer-rich, Ctcf-deficient sites, synergistically attenuates enhancer-promoter loops, particularly at sites enriched for RNA polymerase II and Mediator, and deregulates gene expression, leading to myeloid-skewed expansion of hematopoietic stem/progenitor cells (HSPCs) and myelodysplastic syndromes (MDS). Attenuated enhancer-promoter loops in Stag2/Runx1-deficient cells are associated with downregulation of genes with high basal transcriptional pausing, which are important for the regulation of HSPCs.　Down-regulation of high-pausing genes is also confirmed in STAG2/cohesin-mutated primary AML/MDS samples. Our results highlight a unique STAG2/RUNX1 interplay in gene regulation and provide insights into cohesin-mutated leukemogenesis.

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Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [RNA-seq]

2020-04-07 | GSE131581 | GEO

Combined Cohesin-Runx1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes [Hi-C]

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Combined Cohesin-RUNX1 Deficiency Synergistically Perturbs Chromatin Looping and Causes Myelodysplastic Syndromes.

Project description:STAG2 encodes a cohesin component and is frequently mutated in myeloid neoplasms, showing highly significant comutation patterns with other drivers, including RUNX1. However, the molecular basis of cohesin-mutated leukemogenesis remains poorly understood. Here we show a critical role of an interplay between STAG2 and RUNX1 in the regulation of enhancer-promoter looping and transcription in hematopoiesis. Combined loss of STAG2 and RUNX1, which colocalize at enhancer-rich, CTCF-deficient sites, synergistically attenuates enhancer-promoter loops, particularly at sites enriched for RNA polymerase II and Mediator, and deregulates gene expression, leading to myeloid-skewed expansion of hematopoietic stem/progenitor cells (HSPC) and myelodysplastic syndromes (MDS) in mice. Attenuated enhancer-promoter loops in STAG2/RUNX1-deficient cells are associated with downregulation of genes with high basal transcriptional pausing, which are important for regulation of HSPCs. Downregulation of high-pausing genes is also confirmed in STAG2-cohesin-mutated primary leukemia samples. Our results highlight a unique STAG2-RUNX1 interplay in gene regulation and provide insights into cohesin-mutated leukemogenesis. SIGNIFICANCE: We demonstrate a critical role of an interplay between STAG2 and a master transcription factor of hematopoiesis, RUNX1, in MDS development, and further reveal their contribution to regulation of high-order chromatin structures, particularly enhancer-promoter looping, and the link between transcriptional pausing and selective gene dysregulation caused by cohesin deficiency.This article is highlighted in the In This Issue feature, p. 747.

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