Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Astrocyte-to-astrocyte contact and a positive feedback loop of growth factor signaling regulate astrocyte maturation

ABSTRACT: Astrocyte-to-astrocyte contact and a positive feedback loop of growth factor signaling regulate astrocyte maturation

PROVIDER: PRJNA516915 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR8483080.fastq.gz	Fastqsanger.gz
	SRR8483090.fastq.gz	Fastqsanger.gz
	SRR8483100.fastq.gz	Fastqsanger.gz
	SRR8483081.fastq.gz	Fastqsanger.gz
	SRR8483091.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 25

Similar Datasets

Astrocyte-to-astrocyte contact and a positive feedback loop of growth factor signaling regulate astrocyte maturation.

Project description:Astrocytes are critical for the development and function of the central nervous system. In developing brains, immature astrocytes undergo morphological, molecular, cellular, and functional changes as they mature. Although the mechanisms that regulate the maturation of other major cell types in the central nervous system such as neurons and oligodendrocytes have been extensively studied, little is known about the cellular and molecular mechanisms that control astrocyte maturation. Here, we identified molecular markers of astrocyte maturation and established an in vitro assay for studying the mechanisms of astrocyte maturation. Maturing astrocytes in vitro exhibit similar molecular changes and represent multiple molecular subtypes of astrocytes found in vivo. Using this system, we found that astrocyte-to-astrocyte contact strongly promotes astrocyte maturation. In addition, secreted signals from microglia, oligodendrocyte precursor cells, or endothelial cells affect a small subset of astrocyte genes but do not consistently change astrocyte maturation. To identify molecular mechanisms underlying astrocyte maturation, we treated maturing astrocytes with molecules that affect the function of tumor-associated genes. We found that a positive feedback loop of heparin-binding epidermal growth factor-like growth factor (HBEGF) and epidermal growth factor receptor (EGFR) signaling regulates astrocytes maturation. Furthermore, HBEGF, EGFR, and tumor protein 53 (TP53) affect the expression of genes important for cilium development, the circadian clock, and synapse function. These results revealed cellular and molecular mechanisms underlying astrocytes maturation with implications for the understanding of glioblastoma.

| S-EPMC6557696 | biostudies-literature

Astrocyte-to-astrocyte contact and a positive feedback loop of growth factor signaling regulate astrocyte maturation

Project description:Astrocytes were purified from postnatal day 2 mouse cortices by immunopanning with HepaCAM. Inhibitors and DMSO were added on in-vitro day 2. HBEGF was depleted on the cell prep day and till in-vitro day 7. In-vitro day 2, 7 and 14 samples were collected on designed timepointed.

2019-04-30 | GSE125610 | GEO

Analyses of RNAi-heterochromatin positive feedback loop in Tetrahymena

Project description:Analyses of RNAi-heterochromatin positive feedback loop in Tetrahymena

| PRJNA343227 | ENA

A positive feedback loop controls Toxoplasma chronic differentiation

Project description:Successful infection strategies must balance pathogen amplification and persistence. In Toxoplasma gondii, this is accomplished through differentiation into dedicated cyst-forming chronic stages that avoid clearance by the host immune system. The transcription factor BFD1 is both necessary and sufficient for stage conversion; however, its regulation is not understood. We examine five factors transcriptionally activated by BFD1. One of these is a cytosolic RNA-binding protein of the CCCH-type zinc finger family, which we name BFD2. Parasites lacking BFD2 fail to induce BFD1 and are consequently unable to fully differentiate in culture or in mice. BFD2 interacts with the BFD1 transcript under stress and deletion of BFD2 reduces BFD1 protein levels, but not mRNA abundance. The reciprocal effects on BFD2 transcription and BFD1 translation outline a positive feedback loop that enforces commitment to differentiation. BFD2 helps explain how parasites commit to the chronic gene-expression program and elucidates how the balance between proliferation and persistence is achieved over the course of infection.

2023-08-07 | PXD039648 | Pride

A positive feedback loop mediates crosstalk between calcium, cyclic nucleotide and lipid signaling in Toxoplasma gondii.

Project description:Fundamental processes of obligate intracellular parasites, such as Plasmodium falciparum and Toxoplasma gondii are controlled by a set of plant-like calcium dependent kinases (CDPKs), the conserved cAMP- and cGMP-dependent protein kinases (PKA and PKG), second messengers and lipid signalling. While some major components of the signalling networks have been identified, how these are connected is largely not known. Here, we compare the phospho-signalling networks during Toxoplasma egress from its host cell by artificially raising cGMP or calcium levels to activate PKG or CDPKs, respectively. We show that both these inducers trigger near identical signalling pathways and provide evidence for a feedback loop involving CDPK3. We measure phospho- and lipid signalling in parasites treated with the Ca2+ ionophore A23187 in a sub-minute timecourse and show CDPK3-dependent regulation of diacylglycerol levels and increased phosphorylation of four phosphodiesterases (PDEs), suggesting their function in the feedback loop. Disruption of CDPK3 leads to elevated cAMP levels and inhibition of PKA signalling rescues the egress defect of ΔCDPK3 parasites treated with A23187. Biochemical analysis of the four PDEs identifies PDE2 as the only cAMP-specific PDE among these candidates while the other PDEs are cGMP specific; two of which are inhibited by the predicted PDE inhibitor BIPPO. Conditional deletion of the 4 PDEs supports an important, but non-essential role of PDE1 and PDE2 for growth, while only the latter plays a role in controlling A23187-mediated egress. In summary, we uncover a positive feedback loop that potentiates signalling during egress and links several signalling pathways together.

2022-10-17 | PXD030057 | Pride

Analyses of scnRNAs in the mutatnts defective in an RNAi-heterochromatin positive feedback loop in Tetrahymena [scnRNA]

Project description:In the ciliated protozoan Tetrahymena, an RNAi-mediated feedback loop is important for assembling heterochromatin on the sequences that are removed from the somatic genome by programmed DNA elimination. Because heterochromatin is formed exclusively on the eliminated sequences, some mechanism must inhibit this feedback loop at the boundaries of the eliminated sequences. In this study, we show that the HP1-like protein Coi6p, its interaction partners Coi7p and Lia5p, and the histone demethylase Jmj1p are crucial for confining the production of small RNAs to the eliminated sequences.

2017-03-06 | GSE87011 | GEO

A runaway PRH/HHEX-Notch3 feedback loop drives cholangiocarcinoma (ChIP-seq)

Project description:PRH/HHEX-Notch3 feedback loop drives cholangiocarcinoma

2018-12-28 | GSE124430 | GEO

A runaway PRH/HHEX-Notch3 feedback loop drives cholangiocarcinoma (RNA-Seq)

Project description:PRH/HHEX-Notch3 feedback loop drives cholangiocarcinoma

2018-12-28 | GSE124429 | GEO

Analyses of heterochromatin distributions in the mutatnts defective in an RNAi-heterochromatin positive feedback loop in Tetrahymena [ChIP]

Project description:In the ciliated protozoan Tetrahymena, an RNAi-mediated feedback loop is important for assembling heterochromatin on the sequences that are removed from the somatic genome by programmed DNA elimination. Because heterochromatin is formed exclusively on the eliminated sequences, some mechanism must inhibit this feedback loop at the boundaries of the eliminated sequences. In this study, we show that the HP1-like protein Coi6p, its interaction partners Coi7p and Lia5p, and the histone demethylase Jmj1p are crucial for confining the formation of heterochromatin to the eliminated sequences.

2017-03-06 | GSE87013 | GEO

ASIC3-M-CSF-M2 macrophage-positive feedback loop modulates in skin fibrosis pathogenesis

Project description:ASIC3-M-CSF-M2 macrophage-positive feedback loop modulates in skin fibrosis pathogenesis

| PRJNA775894 | ENA