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Mesocentrotus franciscanus

ABSTRACT: red sea urchin

PROVIDER: PRJNA20311 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR000321.fastq.gz	Fastqsanger.gz
	SRR000322.fastq.gz	Fastqsanger.gz
	SRR000323.fastq.gz	Fastqsanger.gz
	SRR000324.fastq.gz	Fastqsanger.gz

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Mesocentrotus franciscanus

Project description:Low coverage whole genome sequencing for red sea urchin

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Mesocentrotus franciscanus

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Mesocentrotus franciscanus

Project description:Mesocentrotus franciscanus Transcriptome or Gene expression

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Mesocentrotus franciscanus

Project description:Mesocentrotus franciscanus

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Project description:The red sea urchin, Mesocentrotus franciscanus, is one the earth’s longest-lived animals, reported to live more than 100 years with indeterminate growth, life-long reproduction and no increase in mortality rate with age. To explore the idea that transcriptional stability is a key determinant of longevity and negligible senescence, age-related gene expression was examined in three tissues of the red sea urchin (Aristotle’s lantern muscle, esophagus and radial nerve cord). Genome-wide transcriptional profiling using RNA-Seq revealed remarkable stability in muscle and esophagus with very few age-related changes in gene expression. In contrast, expression of more than 900 genes was significantly altered with age in radial nerve cord including genes involved in nerve function, signaling, metabolism, cytoskeleton, transcriptional regulation and chromatin modification. Notably, there was an upregulation in expression of genes involved in synaptogenesis and axonogenesis suggesting enhanced nervous system activity with age. Among the signaling pathways affected by age, there was a downregulation in expression of key components of the mTOR signaling pathway and an upregulation of negative regulators of this pathway. This was accompanied by a reduction in expression of genes involved in protein synthesis and mitochondrial function and an increase in expression of genes that promote autophagy. Downregulation of the mTOR pathway together with the other observed changes reveals a unique age-related gene expression profile in the red sea urchin nervous system that may contribute to mitigation of the detrimental effects of aging in this long-lived animal.

2020-06-08 | GSE136352 | GEO

Developmental dynamics of sea urchin and sea star cis-regulation and the evolution of echinoderm genome organization

Project description:We identified cis-regulatory elements based on their dynamic chromatin accessibility during the gastrula-larva stages of sea urchin and sea star and studied their evolution in these echinoderm species

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Project description:Red Sea Urchin (Mesocentrotus franciscanus) Genome

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Effects of handling and short-term captivity: a multi-behaviour approach using red sea urchins, Mesocentrotus franciscanus.

Project description:Understanding the effects of captivity-induced stress on wild-caught animals after their release back into the wild is critical for the long-term success of relocation and reintroduction programs. To date, most of the research on captivity stress has focused on vertebrates, with far less attention paid to invertebrates. Here, we examine the effect of short-term captivity (i.e., up to four days) on self-righting, aggregation, and predator-escape behaviours in wild-caught red sea urchins, Mesocentrotus franciscanus, after their release back into the wild. Aggregation behaviour, which has been linked to feeding in sea urchins, was not affected by handling or captivity. In contrast, the sea urchins that had been handled and released immediately, as well as those that were handled and held captive, took longer to right themselves and were poorer at fleeing from predators than wild, unhandled sea urchins. These results indicate that handling rather than captivity impaired these behaviours in the short term. The duration of captivity did not influence the sea urchin behaviours examined. Longer-term monitoring is needed to establish what the fitness consequences of these short-term behavioural changes might be. Our study nevertheless highlights the importance of considering a suite of responses when examining the effects of capture and captivity. Our findings, which are based on a locally abundant species, can inform translocation efforts aimed at bolstering populations of ecologically similar but depleted invertebrate species to retain or restore important ecosystem functions.

| S-EPMC6431136 | biostudies-literature

Deep conservation of cis-regulatory elements and chromatin organization in echinoderms uncover ancestral regulatory features of animal genomes [Hi-C]

Project description:we generated new reference genome assemblies for two species belonging to two different echinoderm classes: the bat sea star Patiria miniata and the purple sea urchin Strongylocentrotus purpuratus

2024-11-30 | GSE281901 | GEO

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