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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [cardiomyocytes]

ABSTRACT: Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [cardiomyocytes]

PROVIDER: PRJNA599360 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10842100_1.fastq.gz	Fastqsanger.gz
	SRR10842100_2.fastq.gz	Fastqsanger.gz
	SRR10842101_1.fastq.gz	Fastqsanger.gz
	SRR10842101_2.fastq.gz	Fastqsanger.gz
	SRR10842102_1.fastq.gz	Fastqsanger.gz

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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [cardiomyocytes]

Project description:During early development multiple progenitor populations contribute to the formation of the four-chambered heart and its diverse lineages. However, the underlying mechanisms that result in the specification of these progenitor populations are not yet fully understood. We have recently identified a population of cells that gives rise selectively to cardiovascular cells of the heart ventricles. Here, we have used this knowledge to isolate and profile subsets of cardiac mesoderm cells from the mouse embryo and have identified an enrichment for the Notch signaling pathway in ventricular cardiac mesoderm. Using the pluripotent stem cell differentiation system to investigate the role of Notch in a temporally controlled manner, we show that Notch induction increases cardiomyocyte differentiation efficiency. This is due to the enhanced specification of mesoderm to the cardiac lineage. Finally, our data suggests that Notch interacts with WNT signaling to enhance commitment to the cardiac lineage. Overall, our findings support the notion that key signaling events during early heart development are critical for proper lineage specification and segregation and provide additional detail into these processes in mouse and human cardiogenesis.

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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [embryo]

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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage

Project description:Notch Activation Commits Mesoderm Cells to the Cardiac Lineage

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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [embryo]

Project description:Notch Activation Commits Mesoderm Cells to the Cardiac Lineage [embryo]

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Cardiac mesoderm induction by Tbx6 without exogenous factors

Project description:Cardiac mesoderm, a precursor for all cardiovascular lineages, is a promising cell source for basic research and clinical applications. BMP/Nodal/Wnt signaling induces cardiac mesoderm in embryonic stem cells (ESCs); however the molecular mechanism is unclear and the differentiation protocols are labor-intensive. Identification of a master regulator that induces cardiac mesoderm is needed. Here we found that Tbx6 directly reprogrammed mouse fibroblasts into cardiac mesoderm-like cells, which differentiated into cardiomyocytes and smooth muscle cells with addition of lineage-specific transcription factors. In mouse ESCs, BMP/Activin (Nodal) induced Tbx6 in cardiac mesoderm, while inhibition of Tbx6 blocked differentiation into cardiac mesoderm and cardiomyocytes. Conversely, transient expression of Tbx6 induced cardiac mesoderm in ESCs without exogenous factors, and generated all cardiovascular lineages. Mechanistically, Tbx6 directly upregulated Mesp1, inhibited Sox2, and activated BMP/Nodal/Wnt signaling to induce cardiac mesoderm. Thus, Tbx6 acts as a key regulator for cardiac mesoderm induction, and our findings provide new insights into the mechanism of cardiovascular differentiation.

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Notch Activation Commits Mesoderm Cells to the Cardiac Lineage

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

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Analysis of transcriptome changes in Kmt2d deletion in cardiac mesoderm, anterior heart field precursors and cardiomyocytes

Project description:KMT2D is required in the cardiac mesoderm, anterior heart field precursors and cardiomyocytes. Kmt2d deletion in cardiac mesoderm (Mesp1Cre) is embryonic lethal at E10.5 and mutants have hypoplastic hearts; Kmt2d deletion in anterior heart field precursors (Mef2cAHF::Cre) deletion is embryonic lethal at E13.5 and mutants have defects in septation of outflow tract and interventricular septum (IVS); Kmt2d deletion in cardiomyocytes (Tnnt2::Cre) deletion is embryonic lethal at E14.5 and mutants have defects in IVS septation and compact myocardium. The goal of this study is to compare changes in gene expression in these Kmt2d conditional deletion mutants and understand common or distinct pathways dysregulated in absence of KMT2D. Whole genome gene expression analysis was performed on RNA isolated from control and mutant embryonic hearts (or right ventricles and outflow tract for anterior heart field deletion samples). Libraries were prepared using Illumina TruSeq Paired-End Cluster Kit v3, and sequenced with the Illumina HiSeq 2500 system for pair-ended 100 base pairs (PE 100 bp).

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Project description:Cardiac lineage specification in the mouse is controlled by TGFβ and WNT signaling. From fly to fish, BMP has been identified as an indispensable heart inducer. A detailed analysis of the role of Bmp4 and its effectors Smad1/5, however, was still missing. We show that Bmp4 induces cardiac mesoderm formation in murine embryonic stem cells in vitro. Bmp4 first activates Wnt3 and upregulates Nodal. pSmad1/5 and the WNT effector Tcf3 form a complex, and together with pSmad2/3 activate mesoderm enhancers and Eomes. They then cooperate with Eomes to consolidate the expression of many mesoderm factors, including T. Eomes and T form a positive feedback loop and open additional enhancers regulating early mesoderm genes, including the transcription factor Mesp1 establishing the cardiac mesoderm lineage. In parallel, the neural fate is suppressed. Our data confirm the pivotal role of Bmp4 in cardiac mesoderm formation in the mouse. We describe in detail the consecutive and cooperative actions of three signaling pathways, BMP, WNT and Nodal, and their effector transcription factors, during cardiac mesoderm specification.

2023-05-03 | GSE168580 | GEO

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Project description:We compared differential gene expression between WT and BRM KO in mesoderm, cardiac precursors and cardiomyocytes

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