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Active Notch Signaling is Required for Arm Regeneration ina Brittle Star

ABSTRACT: Active Notch Signaling is Required for Arm Regeneration ina Brittle Star

PROVIDER: PRJNA596798 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10742207_1.fastq.gz	Fastqsanger.gz
	SRR10742207_2.fastq.gz	Fastqsanger.gz
	SRR10742208_1.fastq.gz	Fastqsanger.gz
	SRR10742208_2.fastq.gz	Fastqsanger.gz
	SRR10742209_1.fastq.gz	Fastqsanger.gz

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Active Notch Signaling is Required for Arm Regeneration ina Brittle Star

Project description:Cell signaling pathways play key roles to coordinate cellular events in development. Notch signaling pathway is highly conserved across all multicellular animals and is known to co- ordinate a multitude of diverse cellular events, including proliferation, differentiation, fate specification, and cell death. Specific functions of the pathway are however highly context- dependent and are not well characterized in post-traumatic regeneration. Here, we use a small-molecule inhibitor of the pathway (DAPT) to demonstrate that Notch signaling is required for proper arm regeneration in the brittle star Ophioderma brevispina, a highly re- generative member of the phylum Echinodermata. We also employ a transcriptome-wide gene expression analysis (RNA-seq) to characterize the downstream genes controlled by the Notch pathway in the brittle star regeneration.

2019-12-20 | GSE142391 | GEO

The brittle star genome illuminates the genetic basis of animal appendage regeneration

Project description:Species within nearly all extant animal lineages are capable of regenerating body parts. However, it remains unclear whether the gene expression programme controlling regeneration is evolutionarily conserved. Brittle stars are a species-rich class of echinoderms with outstanding regenerative abilities, but investigations into the genetic bases of regeneration in this group have been hindered by the limited available genomic resources. Here, we report a chromosome-scale genome assembly for the brittle star Amphiura filiformis. We show that the brittle star displays the most rearranged genome amongst echinoderms sequenced to date, featuring a reorganised Hox cluster reminiscent of the rearrangements observed in sea urchins. In addition, we performed an extensive profiling of gene expression throughout brittle star adult arm regeneration and identified sequential waves of gene expression governing wound healing, proliferation and differentiation. We conducted comparative transcriptomic analyses with other invertebrate and vertebrate models for appendage regeneration and uncovered hundreds of genes with conserved expression dynamics, notably during the proliferative phase of regeneration. Our findings emphasise the crucial importance of echinoderms to detect long-range expression conservation between vertebrates and classical invertebrate regeneration model systems.

2024-05-07 | GSE246675 | GEO

Active Notch signaling is required for arm regeneration in a brittle star.

Project description:Cell signaling pathways play key roles in coordinating cellular events in development. The Notch signaling pathway is highly conserved across all multicellular animals and is known to coordinate a multitude of diverse cellular events, including proliferation, differentiation, fate specification, and cell death. Specific functions of the pathway are, however, highly context-dependent and are not well characterized in post-traumatic regeneration. Here, we use a small-molecule inhibitor of the pathway (DAPT) to demonstrate that Notch signaling is required for proper arm regeneration in the brittle star Ophioderma brevispina, a highly regenerative member of the phylum Echinodermata. We also employ a transcriptome-wide gene expression analysis (RNA-seq) to characterize the downstream genes controlled by the Notch pathway in the brittle star regeneration. We demonstrate that arm regeneration involves an extensive cross-talk between the Notch pathway and other cell signaling pathways. In the regrowing arm, Notch regulates the composition of the extracellular matrix, cell migration, proliferation, and apoptosis, as well as components of the innate immune response. We also show for the first time that Notch signaling regulates the activity of several transposable elements. Our data also suggests that one of the possible mechanisms through which Notch sustains its activity in the regenerating tissues is via suppression of Neuralized1.

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Dynamic gene expression profiles during arm regeneration in the brittle star Amphiura filiformis

Project description:Transcriptional profiling of arm regeneration in Amphiura filiformis in three stages of differentiation.

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The brittle star genome illuminates the genetic basis of animal appendage regeneration

Project description:The brittle star genome illuminates the genetic basis of animal appendage regeneration

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Project description:Brachypodium distachyon strain:Arm-Arm2B | cultivar:Arm-Arm2B Genome sequencing

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