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Dietary effect on the proteome of the common octopus (Octopus vulgaris) paralarvae, 2D-DIGE gel data

ABSTRACT: Nowadays, the common octopus (Octopus vulgaris) culture is hampered by massive mortalities occurring during early life-cycle stages (paralarvae). Despite the causes of the high paralarvae mortality are not yet well defined and understood, the nutritional stress caused by inadequate diets is pointed out as one of the main factors. In this study the effects of diet on paralarvae is analyzed through a proteomic approach, to search for novel biomarkers of nutritional stress. A total of 43 proteins showing differential expression in the different conditions studied have been identified. The analysis highlights proteins related with the carbohydrate metabolism: glyceraldehyde-3-phosphate-dedydrogenase (GAPDH), triosephosphate isomerase; other ways of energetic metabolism: NADP+-specific isocitrate dehydrogenase, arginine kinase; detoxification: glutathione-S-transferase (GST); stress: heat shock proteins (HSP70); structural constituent of eye lens: S-crystallin 3; and cytoskeleton: actin, actin-beta/gamma1, beta actin. These results allow defining characteristic proteomes of paralarvae depending on the diet; as well as the use of several of these proteins as novel biomarkers to evaluate their welfare linked to nutritional stress. Notably, the changes of proteins like S-crystallin 3, arginine kinase and NAD+ specific isocitrate dehydrogenase, may be related to fed versus starving paralarvae, particularly in the first 4 days of development.

INSTRUMENT(S): 4800 Proteomics Analyzer

ORGANISM(S): Octopus Vulgaris

SUBMITTER: Luz Valero

LAB HEAD: Inmaculada Varo

PROVIDER: PXD006242 | Pride | 2022-03-01

REPOSITORIES: Pride

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			Action	DRS
	F002602.dat	Other
	O16_MSMS_1198.6804_2-1.cal	Other
	O16_MSMS_1198.6804_2.t2d	Other
	O16_MSMS_1790.8625_4-1.cal	Other
	O16_MSMS_1790.8625_4.t2d	Other

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Dietary effect on the proteome of the common octopus (Octopus vulgaris) paralarvae, LC-MS/MS data

Project description:Nowadays, the common octopus (Octopus vulgaris) culture is hampered by massive mortalities occurring during early life-cycle stages (paralarvae). Despite the causes of the high paralarvae mortality are not yet well defined and understood, the nutritional stress caused by inadequate diets is pointed out as one of the main factors. In this study the effects of diet on paralarvae is analyzed through a proteomic approach, to search for novel biomarkers of nutritional stress. A total of 43 proteins showing differential expression in the different conditions studied have been identified. The analysis highlights proteins related with the carbohydrate metabolism: glyceraldehyde-3-phosphate-dedydrogenase (GAPDH), triosephosphate isomerase; other ways of energetic metabolism: NADP+-specific isocitrate dehydrogenase, arginine kinase; detoxification: glutathione-S-transferase (GST); stress: heat shock proteins (HSP70); structural constituent of eye lens: S-crystallin 3; and cytoskeleton: actin, actin-beta/gamma1, beta actin. These results allow defining characteristic proteomes of paralarvae depending on the diet; as well as the use of several of these proteins as novel biomarkers to evaluate their welfare linked to nutritional stress. Notably, the changes of proteins like S-crystallin 3, arginine kinase and NAD+ specific isocitrate dehydrogenase, may be related to fed versus starving paralarvae, particularly in the first 4 days of development.

2019-11-25 | PXD006241 | Pride

Global impact of diet and temperature over aquaculture of Octopus vulgaris paralarvae from a transcriptomic approach

Project description:Common octopus, Octopus vulgaris, is an economically important cephalopod species. However, its rearing under captivity is currently challenged by massive mortalities previous to their juvenile stage due to nutritional and environmental factors. Dissecting the genetic basis and regulatory mechanism behind this mortality requires genomic background knowledge. A transcriptomic sequencing of 10 dph octopus paralarvae from different experimental conditions was constructed via RNA-seq. A total of 613,767,530 raw reads were filtered and de novo assembled into 363,527 contigs of which 82,513 were annotated in UniProt carrying also their GO and KEGG information. Differential gene expression analysis was carried out on paralarvae reared under different diet regimes and temperatures, also including wild paralarvae. Genes related to lipid metabolism exhibited higher transcriptional levels in individuals whose diet includes crustacean zoeas, which had an impact over their development and immune response capability. High temperature induces acclimation processes at the time that increase metabolic demands and oxidative stress. Wild individuals show an expression profile unexpectedly similar to Artemia fed individuals. Proteomic results support the hypothesis revealed by transcriptional analysis. The comparative study of the O. vulgaris transcriptomic profiles allowed the identification of genes that deserve to be further studied as candidates for biomarkers of development and health. The results obtained here on the transcriptional variations of genes caused by diet and temperature will provide new perspectives in understanding the molecular mechanisms behind nutritional and temperature requirements of common octopus that will open new opportunities to deepen in paralarvae rearing requirements.

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Altered proteome in translationinitiation fidelity defective eIF5G31R mutant causes oxidative stress and DNA damage

Project description:The recognition of AUG start codon and selection of the open reading frame (ORF) is fundamental to protein biosynthesis. Defect in the start codon selection adversely affectproteome and have a pleiotropic effect on cellular function. Using proteomic techniques, we identified differential protein expression patterns in the translation initiation defectivehyper GTPaseeIF5G31R mutant cells. Consistently, we observed altered proteome involved in protein catabolism, nucleotide metabolism, fatty acid metabolism, glycolysis, and autophagy.The utilization of the upstream UUG codons by the eIF5G31R mutation caused downregulation of uridylate kinase expression and DNA damage. The eIF5G31R mutant cells showed lower Glutathione levels, high ROS activity, and sensitivity to H2O2.

2022-05-19 | PXD029460 | Pride

Wheat Allergens MALDI-TOF/TOF - Using 7 cm immobilized pH gradient strips to determine levels of clinically relevant proteins in wheat grain extracts

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Cell type diversity in the octopus brain

Project description:Octopuses are mollusks that evolved intricate neural systems which are comparable with vertebrates in terms of cell number, complexity and size. Exactly how an octopus increases its neural cell number so dramatically and whether an increase in cell type diversity enables higher cognitive function and complex behavior is still unknown. To profile the cell diversity of the developing octopus brain we applied 10x Genomics’ single-cell/nuclei RNA sequencing technology. At hatching, the Octopus vulgaris brain possesses the main lobes and connections of an adult brain, but which cell types are present remains elusive. We were able to identify 42 robust cell types comprising mostly neural cells, as well as multiple glial subtypes and other non-neuronal populations such as endothelial cells and fibroblasts. In situ expression analysis of marker genes allowed spatial mapping of clusters, including vertical lobe cells and several optic lobe cell types. Investigation of cell type conservation indicated similar gene expression signatures between glial cells of mice, fly and octopus. Genes related to memory and learning were found enriched in vertical lobe cells, that showed molecular similarities with Kenyon cells in Drosophila but not to any mouse cell type. Lastly, we also analyzed the expression of newly expanded gene families (protocadherins, C2H2 zinc-finger transcription factors and G-protein coupled receptors) and found that these are enriched in specific cell types. Taken together, our data gives insight into cell type evolution and the composition of the complex octopus brain.

2022-01-31 | GSE193622 | GEO

RNA sequencing of Octopus bimaculoides bulk tissues

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Labeo rohita (Rohu) plasma MALDI-TOF MS/MS

Project description:Arsenic (As) is a toxic environmental contaminant and potential human carcinogen. Chronic intake of arsenic-contaminated water leads to arsenicosis that is a major public health problem in many parts of the world, including India and Bangladesh. Thus, the early detection of arsenic toxicity will greatly benefit patients. However, the detection of arsenicosis needs to be done early before onset of severe symptoms in which case the tools used for detection have to be both sensitive and reliable. In this context, the present study investigated plasma proteome changes in arsenic-exposed Labeo rohita, with the aim of identifying biomarkers for arsenicosis. Changes in the plasma proteome were investigated using gel-based proteomics technology. Using quantitative image analysis of the 2D protein profiles, unique protein spots were identified from the plasma proteome by MALDI-TOF-TOF-MS. Unique proteins identified included Apolipoprotein-A1 (Apo-A1), α-2 macroglobulin-like protein (A2ML), and transferrin. Highly up-regulated protein spots identified in plasma from arsenic-exposed fish were liver-specific, including Apo-A1, and A2ML consistent with liver damage. It is proposed that a combination of these proteins could serve as useful biomarkers of hepatotoxicity and chronic liver disease due to arsenic exposure.

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RNA-seq of the Octopus vulgaris nervous system.

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Proteome and peptidome of Vipera berus berus venom

Project description:Snake venom is a rich source of peptides and proteins with a wide range of actions. Many of the components of the venom are currently being tested for their usefulness in the treatment of many diseases ranging from neurological and cardiovascular to cancer. It is also important to constantly search for new proteins and peptides with properties not yet described. The venom of Vipera berus berus has hemolytic, proteolytic and cytotoxic properties, but its exact composition and the factors responsible for these properties are not known. Therefore, an attempt was made to identify proteins and peptides derived from this species venom by using high resolution two-dimensional electrophoresis and MALDI ToF/ToF mass spectrometry. A total of 11 protein classes have been identified mainly proteases but also L-amino acid oxidases, C-type lectin like proteins, cysteine-rich venom proteins and phospholipases A2 and 5 peptides of molecular weight less than 1500 Da. Most of the identified proteins are responsible for the highly hemotoxic properties of the venom. Presence of venom phospholipases A2 and L- amino acid oxidases cause moderate neuro-, myo- and cytotoxicity. All successfully identified peptides belong to the bradikinin-potentiating peptides family.

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