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The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra.

ABSTRACT: The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra.

PROVIDER: PRJNA785876 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17117100.fastq.gz	Fastqsanger.gz
	SRR17117086.fastq.gz	Fastqsanger.gz
	SRR17117087.fastq.gz	Fastqsanger.gz
	SRR17117088.fastq.gz	Fastqsanger.gz
	SRR17117089.fastq.gz	Fastqsanger.gz

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Similar Datasets

The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra.

Project description:A Zic4-dependent switch in Hydra turns tentacle into foot cells.

2023-01-01 | GSE190110 | GEO

The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra

Project description:The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra

| PRJNA789925 | ENA

The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in Hydra

Project description:Purpose: The mechanisms driving epithelial cell fate decisions to create differentiated body structures (such as tentacles and basal disk) are not understood in Hydra. We explored the role of Wnt signaling targets Zic4 and Sp5 in this process. Methods: RNA sequencing of differentiated body parts (tentacles) upon knockdowns of the candidate transcription factors. Comparison to existing datasets for body part identity and cell lineage. Results: Upon Zic4 knockdown, tentacle battery cells transdifferentiate into the basal disk cells in a cell-cycle dependent manner. Similar results are obtained after the knockdown of Sp5, a positive regulator of Zic4 transcription, and their double knockdown enhances the phenotype. Conclusions:We conclude that Zic4 acts as a master regulator to control the choice between two epidermal cell fates – battery cell and basal disk identity. It represses the basal disk specification, which appears to be the default epidermal epithelial differentiation trajectory. We also show evidence for transdifferentiation in Hydra.

2022-12-31 | GSE191177 | GEO

The transcription factor Zic4 promotes tentacle formation and prevents epithelial transdifferentiation in <i>Hydra</i>.

Project description:The molecular mechanisms that maintain cellular identities and prevent dedifferentiation or transdifferentiation remain mysterious. However, both processes are transiently used during animal regeneration. Therefore, organisms that regenerate their organs, appendages, or even their whole body offer a fruitful paradigm to investigate the regulation of cell fate stability. Here, we used Hydra as a model system and show that Zic4, whose expression is controlled by Wnt3/β-catenin signaling and the Sp5 transcription factor, plays a key role in tentacle formation and tentacle maintenance. Reducing Zic4 expression suffices to induce transdifferentiation of tentacle epithelial cells into foot epithelial cells. This switch requires the reentry of tentacle battery cells into the cell cycle without cell division and is accompanied by degeneration of nematocytes embedded in these cells. These results indicate that maintenance of cell fate by a Wnt-controlled mechanism is a key process both during homeostasis and during regeneration.

| S-EPMC9788771 | biostudies-literature

RNA-seq of Hydra body segments and regenerated Hydra animals

Project description:Positional RNA-sequencing of isolated Hydra body pieces and RNA-sequencing of fully regenerated Hydra animal was combined with RNA-sequencing of actively regenerating spheroids (see submission E-MTAB-9672) in order to elucidate the role of tissue stretching on regeneration and body pattern formation.

2022-10-13 | E-MTAB-9676 | biostudies-arrayexpress

Loss of Twist impairs tentacle development and induces epithelial neoplasia in the sea anemone Nematostella vectensis

Project description:The basic helix-loop helix transcription factor Twist plays diverse roles in mesodermal development across bilaterians, but its function in cnidarians remains unclear. Here, we investigate the role of Twist in tentacle morphogenesis and tissue homeostasis in the sea anemone Nematostella vectensis. Using a CRISPR/Cas9 generated knockout, we show that twist mutants exhibit impaired secondary tentacle formation, reduced proliferation in budding tentacles, and absence of micronemes, structures that demarcate tentacle boundaries-suggesting defects in spatial patterning. We demonstrate that twist expression is regulated by Wnt, BMP, and Notch signalling but is independent of MAPK and Hedgehog pathways. Loss of Twist disrupts expression of mesodermal transcription factors paraxis and tbx15 and perturbs the TOR-FGF signalling feedback loop necessary for normal tentacle growth. Moreover, starting at juveniles, mutants develop neoplasm-like epithelial overgrowth with tentacle-like molecular and morphological profiles, indicating a role for Twist in maintaining tissue homeostasis at the oral pole. Together, our findings reveal that Twist integrates major signalling pathways to regulate secondary tentacle patterning and maintain spatial tissue organisation in the diploblastic Nematostella vectensis.

2025-10-30 | GSE308593 | GEO

Mechanisms of tentacle morphogenesis in the sea anemone, Nematostella vectensis

Project description:Evolution of the capacity to form secondary outgrowths from the principal embryonic axes was a crucial innovation that potentiated the diversification of animal body plans. Nevertheless, precisely how such outgrowths develop in early-branching metazoan species remains poorly understood. To identify genes potentially involved in tentacle initiation, outgrowth, and maintenance, we performed transcriptional profiling at three different stages of Nematostella development: late planula larvae with tentacle buds, animals with growing tentacles, and mature animals with four-tentacle polyps. At each of these three stages, the animal was bisected such that the oral tentacle portion (head) could be compared to the body column.

2013-05-01 | GSE45588 | GEO

Mechanisms of tentacle morphogenesis in the sea anemone, Nematostella vectensis

2013-05-01 | E-GEOD-45588 | biostudies-arrayexpress

An evolutionary conserved Sp5-Wnt3 regulatory module contributes to restrict head organizer activity in Hydra

Project description:Head regeneration in Hydra requires the transformation of gastric tissue into a head organizer that produces a head activator and a head inhibitor. Here we report the decipherment of a long-standing question in developmental biology, the identification of the transcription factor Sp5 as a key head inhibitory component. We show that Sp5 has an apical to basal graded expression pattern in intact Hydra, its expression is induced upon Wnt/β-catenin signaling activation and when knocked-down triggers the formation of multiple heads and axes in homeostatic and regenerative conditions. Our data indicate that Sp5 acts in a feed-forward loop to robustly regulate its own expression and that Sp5 prevents head formation by repressing the Wnt3 promoter. This Sp5 mediated Wnt antagonism is conserved and was invented early in metazoan evolution to set up axial patterning.

2019-03-01 | GSE110277 | GEO

An evolutionarily-conserved Wnt3/β-catenin/Sp5 feedback loop restricts head organizer activity in Hydra [ChIP-Seq]

2019-01-18 | GSE121316 | GEO