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ATAC-seq and RNA-seq of Notch signaling response in RTE cells

ABSTRACT: ATAC-seq and RNA-seq of Notch signaling response in RTE cells

PROVIDER: PRJNA953953 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24116314_1.fastq.gz	Fastqsanger.gz
	SRR24116314_2.fastq.gz	Fastqsanger.gz
	SRR24116315_1.fastq.gz	Fastqsanger.gz
	SRR24116315_2.fastq.gz	Fastqsanger.gz
	SRR24116316_1.fastq.gz	Fastqsanger.gz

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ATAC-seq of Notch signaling response in RTE cells

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ATAC-seq of Notch signaling response in RTE cells

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RNA-seq of Notch signaling response in RTE cells

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RNA-seq of Notch signaling response in RTE cells

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NCoR1 limits angiogenic capacity by altering Notch signaling [ATAC-seq]

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NCoR1 limits angiogenic capacity by altering Notch signaling [ATAC-seq]

Project description:Corepressors negatively regulate gene expression by chromatin compaction. Targeted regulation of gene expression could provide a means to control endothelial cell phenotype. We hypothesize that by targeting corepressor proteins, endothelial angiogenic function can be improved. To study this, the expression and function of nuclear corepressors in human umbilical vein endothelial cells (HUVEC) and in murine organ culture was studied. RNA-seq revealed that nuclear receptor corepressor 1 (NCoR1), Silencing Mediator of Retinoid and Thyroid hormone receptors (SMRT) and repressor element-1 silencing transcription factor (REST) are the highest expressed corepressors in HUVECs. Knockout and knockdown strategies demonstrated that the depletion of NCoR1 increased the angiogenic capacity of endothelial cells, whereas depletion of SMRT or REST did not. Interestingly, the effect was VEGF signaling independent. NCoR1 depletion significantly upregulated angiogenesis-associated genes, especially tip cell genes, including ESM1, DLL4 and NOTCH4, as observed by RNA- and ATAC-seq. Confrontation assays comparing cells with and without NCoR1-deficiency revealed that loss of NCoR1 promotes a tip-cell position during spheroid sprouting. Moreover, a proximity ligation assay identified NCoR1 as a direct binding partner of the Notch-signaling-related transcription factor RBPJk. Luciferase assays showed that siRNA-mediated knockdown of NCoR1 promotes RBPJk activity. Furthermore, NCoR1 downregulation prompts upregulation of several elements in the Notch signaling cascade. Downregulation of NOTCH4, but not NOTCH1, prevented the positive effect of NCoR1 knockdown on spheroid outgrowth. Collectively, these data indicate that decreasing NCOR1 expression is an attractive approach to promote angiogenic function.

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Notch Signaling Enhances Bone Regeneration in the Zebrafish Mandible

Project description:Loss or damage to the mandible due to trauma, treatment of oral malignancies, and other diseases is currently treated using bone grafting techniques that suffer from numerous shortcomings and contraindications. Zebrafish naturally heal large injuries to their mandibular bone, and thus offer an opportunity to understand how to boost intrinsic healing ability. Using a novel her6:mCherry Notch reporter, we show that canonical Notch signaling is induced during the initial stages of cartilage callus formation in both mesenchymal cells and chondrocytes. We also show that modulation of Notch signaling during the initial postoperative period results in lasting changes to regenerate bone quantity one month later. Notch signaling is required for mandibular bone healing, as pharmacological inhibition of Notch signaling blocks cartilage callus formation and results in non-union. Conversely, conditional transgenic activation of Notch signaling accelerates regenerative ossification. Mechanistically, we report that postoperative Notch signaling regulates multiple phases of chondroid regeneration and patterns callus metabolic landscape. Given conserved functions of Notch signaling in bone repair across vertebrates, we propose that targeted activation of Notch signaling during the early phases of bone healing may have therapeutic value.

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Barcoding Notch signaling in the developing brain

Project description:Developmental signaling inputs are fundamental for shaping cell fates and behavior. However, traditional fluorescent-based signaling reporters have limitations in scalability and molecular resolution of cell types. We present SABER-seq, a CRISPR-Cas molecular recorder that stores transient developmental signaling cues as permanent mutations in cellular genomes for deconstruction at later stages via single-cell transcriptomics. We applied SABER-seq to record Notch signaling in developing zebrafish brains. SABER-seq has two components: a signaling sensor and a barcode recorder. The sensor activates Cas9 in a Notch-dependent manner with inducible control while the recorder obtains mutations in ancestral cells where Notch is active. We combine SABER-seq with an expanded juvenile brain atlas to identify cell types derived from Notch-active founders. Our data reveals rare examples where differential Notch activity in ancestral progenitors is detected in terminally differentiated neuronal subtypes. SABER-seq is a novel platform for rapid, scalable and high-resolution mapping of signaling activity during development.

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ATAC-seq and RNA-seq of Notch signaling response in RTE cells

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

2023-04-12 | GSE229285 | GEO