Project description:Sea urchins lack proper eye organs but are photosensitive. In this study, we investigate an extraocular photoreceptor cell (PRC) system in developmental stages of the sea urchin Paracentrotus lividus.
Project description:Toxigenic effects of two benthic diatoms upon grazing activity of the sea urchin: morphological, metabolomic and de novo transcriptomic analysis
Project description:Possible toxigenic effects of benthic diatoms upon grazing activity of the sea urchin P. lividus: morphological, metabolomic and de novo transcriptomic analysis
Project description:Possible toxigenic effects of benthic diatoms upon grazing activity of the sea urchin P. lividus: morphological, metabolomic and de novo transcriptomic analysis
Project description:Our aim was to study the immune system of a Mediterranean sea urchin Paracentrotus lividus. Using a label free quantitative mass spectrometry approach we analyzed how bacterial lipopolysaccharide (LPS) is able to modulate the coelomocytes proteome and effect its cellular pathways such as cytoskeleton reorganization, stress and energetic homeostasis.
Project description:Sea urchins are emblematic marine animals with a rich fossil record and represent instrumental models for developmental biology. As echinoderms, sea urchins display several characteristics that set them apart from other deuterostomes such as their highly regulative embryonic development and their unique pentaradial adult body plan. To determine whether these characteristics are linked to particular genomic rearrangement or gene regulatory rewiring, we introduce a chromosome-scale genome assembly for sea urchin Paracentrotus lividus as well as extensive transcriptomic and epigenetic profiling during its embryonic development. We found that sea urchins show opposite modalities of genome evolution as compared to those of vertebrates: they retained ancestral chromosomal linkages that otherwise underwent mixing in vertebrates, while their intrachromosomal gene order has evolved much faster between sea urchin species that split 60 Myr ago than it did in vertebrates. We further assessed the conservation of the cis-regulatory program between sea urchins and chordates and identified conserved modules despite the developmental and body plan differences. We documented regulatory events underlying processes like zygotic genome activation and transition to larval stage in sea urchins. We also identified a burst of gene duplication in the echinoid lineage and showed that some of these expanded genes are involved in organismal novelties, such as Aristotle's lantern, tube feet, or in the specification of lineages through for instance the pmar1 and pop genes. Altogether, our results suggest that gene regulatory networks controlling development can be conserved despite extensive gene order rearrangement.
Project description:An omic approach for the assessment of the molecular responses to different stresses in embryos and adult immune cells of the Mediterranean sea urchin species Paracentrotus lividus
Project description:The outcomes of this project are to identify bioactive marine natural products from Irish marine life. This specific dataset contains LC-MS/MS spectra from tissue of the sea urchin Paracentrotus lividus. Files are part of the Metabolights dataset MTBLS874.
