Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA208333 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR900108_1.fastq.gz | Fastqsanger.gz | |||
| SRR900108_2.fastq.gz | Fastqsanger.gz | |||
| SRR900109_1.fastq.gz | Fastqsanger.gz | |||
| SRR900109_2.fastq.gz | Fastqsanger.gz | |||
| SRR900110_1.fastq.gz | Fastqsanger.gz |
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Project description:Endothelin signaling is one of the essential signaling pathways that control vertebrate development. Dysregulated Endothelin signaling plays an important role in the pathogenesis of human diseases such as Hirschsprung’s disease, pulmonary hypertension and cancer. However, the downstream transcriptional program and transcriptional factors of Endothelin signaling have been incompletely understood. Here, we used RNA-sequencing to identify the genes regulated by Endothelin signaling in the neural crest, where Endothelin signaling functions primarily during development. We further demonstrate that Endothelin induces gene expression through the de-repression of the MADS Box transcription factor MEF2C. Moreover, in the Mef2c gene locus, we identified an Endothelin responsive cis-regulatory element which functions as a central component of an Endothelin-MEF2C positive feedback transcriptional mechanism that regulates downstream gene expression.
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Project description:Neural crest development is orchestrated by a complex and still poorly understood gene regulatory network. Premigratory neural crest is induced at the lateral border of the neural plate by the combined action of signaling molecules and transcription factors such as AP2, Gbx2, Pax3 and Zic1. Among them, Pax3 and Zic1 are both necessary and sufficient to trigger a complete neural crest developmental program. However, their gene targets in the neural crest regulatory network remain unknown. Here, through a transcriptome analysis of frog microdissected neural border, we identified an extended gene signature for the premigratory neural crest, and we defined novel potential members of the regulatory network. This signature includes 34 novel genes, as well as 44 known genes expressed at the neural border. Using another microarray analysis which combined Pax3 and Zic1 gain-of-function and protein translation blockade, we uncovered 25 Pax3 and Zic1 direct targets within this signature. We demonstrated that the neural border specifiers Pax3 and Zic1 are direct upstream regulators of neural crest specifiers Snail1/2, Foxd3, Twist1, and Tfap2b. In addition, they may modulate the transcriptional output of multiple signaling pathways involved in neural crest development (Wnt, Retinoic Acid) through the induction of key pathway regulators (Axin2 and Cyp26c1). We also found that Pax3 could maintain its own expression through a positive autoregulatory feedback loop. These hierarchical inductions, feedback loops, and pathway modulation provide novel tools to understand the neural crest induction network. The transcriptomes of neural border samples (stage 14 and 18) were compared to the transcriptome of anterior neural fold (stage 18), early neural plate (stage 12), and animal cap explants (stage14) to identify genes expressed specifically in neural border samples. Tissue samples from Xenopus laevis embryos were dissected, then total RNA was extracted and hybridized on Affymetrix microarrays. Selected tissue samples encompass the neural crest at different stages of its induction (early neural plate at stage 12, neural border at stage 14, neural border at stage 18), as well as reference tissues (anterior neural fold at stage 18, a tissue that belongs to the neural border but does not produce neural crest, and animal cap grown until stage 14 that differentiates into epidermis).
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Project description:Neural crest development is orchestrated by a complex and still poorly understood gene regulatory network. Premigratory neural crest is induced at the lateral border of the neural plate by the combined action of signaling molecules and transcription factors such as AP2, Gbx2, Pax3 and Zic1. Among them, Pax3 and Zic1 are both necessary and sufficient to trigger a complete neural crest developmental program. However, their gene targets in the neural crest regulatory network remain unknown. Here, through a transcriptome analysis of frog microdissected neural border, we identified an extended gene signature for the premigratory neural crest, and we defined novel potential members of the regulatory network. This signature includes 34 novel genes, as well as 44 known genes expressed at the neural border. Using another microarray analysis which combined Pax3 and Zic1 gain-of-function and protein translation blockade, we uncovered 25 Pax3 and Zic1 direct targets within this signature. We demonstrated that the neural border specifiers Pax3 and Zic1 are direct upstream regulators of neural crest specifiers Snail1/2, Foxd3, Twist1, and Tfap2b. In addition, they may modulate the transcriptional output of multiple signaling pathways involved in neural crest development (Wnt, Retinoic Acid) through the induction of key pathway regulators (Axin2 and Cyp26c1). We also found that Pax3 could maintain its own expression through a positive autoregulatory feedback loop. These hierarchical inductions, feedback loops, and pathway modulation provide novel tools to understand the neural crest induction network. Transcriptomes of animal caps overexpressing Pax3+/-Zic1 in the presence/absence of cycloheximide, a translation inhibitor, were compared to control animal caps to identify direct Pax3 and Zic1 targets 2-4 cells stage embryos were injected with inducible Pax3-GR+/-Zic1-GR constructs. Animal caps were cut at stage 9. Cycloheximide (Chx, 0.1mg/ml) was then applied to the healed animal caps, from stage 10 to 10.5 (i.e. for 30 min at 23*C), then dexamethasone (Dex) was added at stage 10.5 to the cycloheximide-containing medium. Explants were rinced and lysed after two additional hours at 23*C, i.e. when sibling embryos reached stage 11.5-12. Total RNA was then extracted and hybridized on Affymetrix microarrays. Transcriptomes were compared to determine Pax3 and Zic1 targets.
2013-12-28 | E-GEOD-53677 | biostudies-arrayexpress
Project description:Neural crest development is orchestrated by a complex and still poorly understood gene regulatory network. Premigratory neural crest is induced at the lateral border of the neural plate by the combined action of signaling molecules and transcription factors such as AP2, Gbx2, Pax3 and Zic1. Among them, Pax3 and Zic1 are both necessary and sufficient to trigger a complete neural crest developmental program. However, their gene targets in the neural crest regulatory network remain unknown. Here, through a transcriptome analysis of frog microdissected neural border, we identified an extended gene signature for the premigratory neural crest, and we defined novel potential members of the regulatory network. This signature includes 34 novel genes, as well as 44 known genes expressed at the neural border. Using another microarray analysis which combined Pax3 and Zic1 gain-of-function and protein translation blockade, we uncovered 25 Pax3 and Zic1 direct targets within this signature. We demonstrated that the neural border specifiers Pax3 and Zic1 are direct upstream regulators of neural crest specifiers Snail1/2, Foxd3, Twist1, and Tfap2b. In addition, they may modulate the transcriptional output of multiple signaling pathways involved in neural crest development (Wnt, Retinoic Acid) through the induction of key pathway regulators (Axin2 and Cyp26c1). We also found that Pax3 could maintain its own expression through a positive autoregulatory feedback loop. These hierarchical inductions, feedback loops, and pathway modulation provide novel tools to understand the neural crest induction network. The transcriptomes of neural border samples (stage 14 and 18) were compared to the transcriptome of anterior neural fold (stage 18), early neural plate (stage 12), and animal cap explants (stage14) to identify genes expressed specifically in neural border samples.
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Project description:Human neural crest cell development progresses via a pre-neural border (pNB) cell state that precedes the induction of the neurectoderm and the neural border. Here, we identify a set of pNB gene candidates, including forkhead box B1 (FOXB1), and their associated enhancers, that are rapidly activated by β-catenin-mediated signaling during human embryonic stem (ES) cell differentiation towards neural crest cells. FOXB1 simultaneously maintains neuroectoderm competency and controls the timing of differentiating ES cells to acquire neural crest fate by directly targeting key neural crest and neural progenitor loci in a context-dependent manner. Notably, the transient expression of FOXB1 in pre-neural crest cells also establishes autonomic neurogenic potential in mature neural crest cells, likely via its regulation of the expression of ASCL1, a master regulator of autonomic neurons. Altogether, our data implicates pNB cell state as the missing link bridging the exit of pluripotency to the acquisition of neural crest fate and its diverse ecto-mesenchymal differentiation potentials.
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Project description:We cultured adherent primary cell lines from NB tumor samples. Adherent primary cell lines from NB tumor samples have a subpopulation of neural crest progenitors that grow as spheres when cultured in low-binding conditions. We tested the changes in gene expression induced by endothelin-1 (ET1), a cytokine that regulates proliferation, migration, differentiation and survival of NC cells .
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