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GDF10 promotes rodent cardiomyocyte maturation during the postnatal period

ABSTRACT: GDF10 promotes rodent cardiomyocyte maturation during the postnatal period

PROVIDER: PRJNA1197527 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31700421_1.fastq.gz	Fastqsanger.gz
	SRR31700421_2.fastq.gz	Fastqsanger.gz
	SRR31700422_1.fastq.gz	Fastqsanger.gz
	SRR31700422_2.fastq.gz	Fastqsanger.gz
	SRR31700423_1.fastq.gz	Fastqsanger.gz

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GDF10 promotes rodent cardiomyocyte maturation during the postnatal period

Project description:Cardiomyocytes and cardiac fibroblasts undergo coordinated maturation after birth, and cardiac fibroblasts are required for postnatal cardiomyocyte maturation in mice. Here, we investigate the role of cardiac fibroblast-expressed Growth Differentiating Factor 10 (GDF10) in postnatal heart development. In neonatal mice, Gdf10 is expressed specifically in cardiac fibroblasts, with its highest expression coincident with onset of cardiomyocytes cell cycle arrest and transition to hypertrophic growth. In neonatal rat ventricular myocyte cultures, GDF10 treatment promotes cardiomyocyte maturation indicated by increased binucleation, downregulation of cell cycle progression genes and upregulation of cell cycle inhibitor genes. GDF10 treatment leads to an increase in cardiomyocyte cell size together with increased expression of mature sarcomeric protein isoforms and decreased expression of fetal cardiac genes. RNAsequencing of GDF10-treated NRVM shows an increase in gene expression related to myocardial maturation, including upregulation of sodium and potassium channel genes. In vivo, loss of Gdf10 leads to a delay in myocardial maturation indicated by a decrease in cardiomyocyte cell size and binucleation as well as increased mitotic activity at postnatal (P) day 7. Further, induction of mature sarcomeric protein isoform gene expression is delayed, and expression of cell cycle progression genes is prolonged. However, by P10 indicators of cardiomyocyte maturation and mitotic activity are normalized in Gdf10-null hearts relative to controls. Together, these results implicate Gdf10 as a novel crosstalk mediator between cardiomyocytes and cardiac fibroblasts, required for appropriate timing of cardiomyocyte maturation steps including binucleation, hypertrophy, mature sarcomeric isoform switch and cell cycle arrest in the postnatal period.

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Postnatal development of Cardiomyocyte

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Project description:Postnatal heart maturation is the basis of normal cardiac function and provides critical insights into heart repair and regenerative medicine. While static snapshots of the maturing heart have provided much insight into its molecular signatures, few key events during postnatal cardiomyocyte maturation have been uncovered.Here we processed bulkRNASeq and ChIPSeq of Cardiomyocyte at different postnatal time points.

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Project description:Postnatal heart maturation is the basis of normal cardiac function and provides critical insights into heart repair and regenerative medicine. While static snapshots of the maturing heart have provided much insight into its molecular signatures, few key events during postnatal cardiomyocyte maturation have been uncovered.Here we processed single cell RNASeq of Cardiomyocyte at different postnatal time points.

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AP-1 activation mediates postnatal cardiomyocyte maturation

Project description:AP-1 activation mediates postnatal cardiomyocyte maturation

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AP-1 activation mediates postnatal cardiomyocyte maturation

Project description:Mammalian cardiomyocytes rapidly mature after birth, with hallmarks such as cell-cycle exit, binucleation, and metabolic switch to oxidative phosphorylation of lipids. The causes and transcriptional programs regulating cardiomyocyte maturation are not fully understood yet. Thus, we performed single cell RNA-seq of neonatal and postnatal day 7 rat hearts to identify the key factors for this process and found AP-1 as a key factor to regulate cardiomyocyte maturation. To find the mechanism of AP-1 during cardiomyocyte maturation, we performed RNA-seq analysis of neonatal rat ventricular cardiomyocytes and found Ap-1 promote cardiomyocyte maturation by regulating cardiomyocyte metabolism.

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GDF10 cell-autonomously alleviates fibrotic response in HSCs

Project description:Liver fibrosis has emerged as the primary determinant of outcomes in metabolic dysfunction associated steatohepatitis (MASH). Quiescent hepatic stellate cells (HSCs) differentiate into activated HSCs or myofibroblasts, which drives liver fibrosis and contribute to the progressive loss of hepatic function. However, the underlying mechanisms of autocrine signals driving and reversing HSC activation and fibrotic response within the liver microenvironment remains incompletely delineated. Here, through searching for cytokines highly enriched expression in HSCs compared to other liver cell types by single-cell transcriptomic analysis, we found that Gdf10 is specifically expressed in HSCs, whereas its protein levels were elevated during fibrosis associated with MASH and CCl4-induced liver injury. The functional importance of GDF10 in alleviating the progression of liver fibrosis was demonstrated using gain and loss of GDF10 function mice and cultured HSCs treated with GDF10. Furthermore, the novel HSC-targeted delivery strategy of Gdf10 mRNA in fibrosis mice reversed their fibrotic phenotypes. These results reveal a new regulatory pathway in MASH microenvironment, suggesting a promising strategy for delivering drugs that can shift HSC functions to restore HSC balance.

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