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Analysis of myocardial cellular gene expression during pressure overload reveals matrix based functional intercellular communication

ABSTRACT: Analysis of myocardial cellular gene expression during pressure overload reveals matrix based functional intercellular communication

PROVIDER: PRJNA749574 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15227900.fastq.gz	Fastqsanger.gz
	SRR15227901.fastq.gz	Fastqsanger.gz
	SRR15227902.fastq.gz	Fastqsanger.gz
	SRR15227903.fastq.gz	Fastqsanger.gz
	SRR15227904.fastq.gz	Fastqsanger.gz

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Myocardial cellular gene expression during pressure overload: evidence for transient partial endothelial to mesenchymal transition [scDROP-seq]

Project description:Pathological processes underlying pressure overload triggered heart failure were mainly analyzed from a cardiomyocyte centric view. To identify new cellular mechanisms, we isolated cardiomyocytes, endothelial cells and fibroblasts as most abundant cardiac cell types from mice in the subacute and chronic stages of pressure overload (by transverse aortic constriction, TAC) and performed RNA-sequencing. We detected highly cell-type specific transcriptional responses with characteristic time courses and active intercellular communication, especially early after TAC. We focused on endothelial cells, and single-cell sequencing in this population showed enhanced expression of collagens and inflammatory mediators at this stage. Importantly, these endothelial transcriptional changes were transduced to the translational level as shown by Ribo-Tag sequencing and verification of collagen protein production by cardiac endothelial cells. In conclusion, we provide a resource of cardiac cellular gene expression in pressure overload and reveal the induction of collagens by endothelial cells as potential therapeutic target.

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Project description:Myocardial deletion of klf4 sensitizes mouse to pressure overload. In order to gain a better understanding of molecular mechanisms of such alterations, we profiled gene expression before and after 3-day of pressure overload (induced by transverse aortic constriction -TAC) in the hearts from MHC-cre (Cre) control and MHC-cre-klf4-deficient (KO) mice. 10wk old male mice was subjected to transverse aortic constriction (TAC) to induce pressure overload or sham operation as control group. After 3 days, heart was removed and total RNA was extracted from apex and subjected for array analysis. Four animals in each group.

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Myocardial cellular gene expression during pressure overload: evidence for transient partial endothelial to mesenchymal transition [Bulk RNA-seq]

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Project description:Here, we show that adult cardiac fibroblasts express the cardiomyocyte transcription factors GATA-4 and GATA-6 to promote adaptive remodeling in pressure overload induced cardiac hypertrophy. Using a mouse model with specific single or double deletion of Gata4 and Gata6 in stress activated fibroblasts, we found a reduced myocardial capillarization in mice with Gata4/6 double deletion following pressure overload, while single deletion of Gata4 or Gata6 had no effect. Importantly, we confirmed the reduced angiogenic response using an in vitro co-culture system with Gata4/6 deleted cardiac fibroblast and endothelial cells. A comprehensive RNA-sequencing analysis revealed an upregulation of anti-angiogenic genes upon Gata4/6 deletion in fibroblasts, and siRNA mediated downregulation of these genes restored endothelial cell growth. In conclusion, we identified a novel role for the cardiac transcription factors GATA4 and GATA6 in heart fibroblasts, where both proteins act in concert to promote myocardial capillarization and heart function by directing intercellular crosstalk.

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Analysis of myocardial cellular gene expression during pressure overload reveals matrix based functional intercellular communication

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

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Analysis of myocardial cellular gene expression during pressure overload reveals matrix based functional intercellular communication.

Project description:To identify cellular mechanisms responsible for pressure overload triggered heart failure, we isolated cardiomyocytes, endothelial cells, and fibroblasts as most abundant cell types from mouse hearts in the subacute and chronic stages after transverse aortic constriction (TAC) and performed RNA-sequencing. We detected highly cell-type specific transcriptional responses with characteristic time courses and active intercellular communication. Cardiomyocytes after TAC exerted an early and sustained upregulation of inflammatory and matrix genes and a concomitant suppression of metabolic and ion channel genes. Fibroblasts, in contrast, showed transient early upregulation of inflammatory and matrix genes and downregulation of angiogenesis genes, but sustained induction of cell cycle and ion channel genes during TAC. Endothelial cells transiently induced cell cycle and extracellular matrix genes early after TAC, but exerted a long-lasting upregulation of inflammatory genes. As we found that matrix production by multiple cell types triggers pathological cellular responses, it might serve as a future therapeutic target.

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