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Transcriptomic response in gilthead sea bream (Sparus aurata) liver exposed to gold nanoparticles

ABSTRACT: Explore the underlying mechanisms-of-action after short-term (24 h) waterborne exposure to low (0.5 μg/L) and high (50 μg/L) gold nanoparticles (AuNP) concentrations in gilthead sea bream.

ORGANISM(S): Sparus aurata

PROVIDER: GSE93930 | GEO | 2017/01/24

SECONDARY ACCESSION(S): PRJNA362853

REPOSITORIES: GEO

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Brewer’s spent dry yeast modulates immunity in gilthead sea bream (Sparus aurata)

Project description:We report a comparison of tissue-specific (head kidney, intestine and liver) gene expression profiles from gilthead sea bream fed with control and Brewer's spent dry yeast (SDY) diets.The inclusion of SDY at 30% in the experimental diet (40% crude protein, 16% crude lipid) resulted in a reduction in FM (10%) and PP (31.4%) contents. 218 differentially expressed genes (DEGs) were identified among all tissues, out of which, 141 were up- and 77 down-regulated. The enrichment analysis of DEGs revealed that SDY had a modulatory effect on several processes related to host’s immunity, oxygen’s carrier capacity, sexual differentiation, metabolism, and digestion. This study supports the notion that brewery’s by-products like SDY are suitable for aquafeeds of carnivorous fish species such as the gilthead sea bream, and promotes a circular bioeconomy model that reuses, recovers and recycles resources instead of producing wastes

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Effects of the nutritional background and parasite infection on the intestine transcriptome of gilthead sea bream, Sparus aurata

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Project description:Sparicotylosis is an endemic parasitic disease across the Mediterranean Sea caused by the polyopisthocotylean monogenean Sparycotyle chrysophrii, which affects the gills of gilthead sea bream (Sparus aurata). Current disease-management, mitigation and treatment strategies are scarce against sparicotylosis. In order to successfully develop more efficient therapeutic strategies against this disease, understanding which molecular mechanisms and metabolic pathways are altered in the host is critical. This study aims to elucidate how S. chrysophrii infection modulates giltheadd seea bream physiological status and to identify the main altered biological processes through plasma proteomics of the host.

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Transcriptome analysis of gilthead sea bream (Sparus aurata) brain after exposure to environmental concentrations of human pharmaceuticals

Project description:A gilthead sea bream (Sparus aurata) microarray platform was developed to identify brain gene expression profiles in response to environmental concentrations of human pharmaceuticals. Comparative analysis of gene expression profiles was conducted among brain of gilthead seabream exposed to Acetaminophen (APAP; analgesic), Carbamazepine (CBZ; anti-epileptic) and Atenolol (AT; β-blocker). All groups of samples were also compared with brain of control individuals.

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Proteomic changes induced by cold challenge in gilthead sea bream (Sparus aurata) liver

Project description:We report the proteomic characterization of livers from Sparus aurata exposed to cold temperatures. In this study, mimicking the winter challenge conditions, a 8 week feeding trial was carried out on gilthead sea bream juveniles reared in RAS systems at a temperature ramp made of two phases of four weeks each: a cooling phase from 18°C 8 (t0) to 11°C (t1) and a cold maintenance phase at 11°C (t2). Sparus aurata livers, after exposure to the three temperature phases (t0, t1 and t2), were collected and analyzed using a shotgun proteomics approach based on filter-aided sample preparation followed by tandem mass spectrometry, peptide identification carried out using Sequest-HT as search engine within the Proteome Discoverer informatic platform, and label-free differential analysis. Along the whole trial, sea breams underwent several changes occurring upon thermal stress in liver protein abundance. These occurred mostly during the cooling phase, when catabolic processes were mainly observed. These included protein and lipid degradation and a decrease in protein synthesis and amino acid metabolism. A decrease in protein mediators of oxidative stress protection was also seen. Liver protein profiles showed less marked changes during cold maintenance, although pathways such as the methionine cycle and sugar metabolism were significantly affected. This study provided useful hints on the dynamics and extent of the metabolic shift occurring in sea bream liver with decreasing water temperature, helping the development of feeds aimed at compensating the thermal stress encountered by fish in offshore farming conditions.

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Genome expression profile of early response to photobacteriosis in gilthead sea bream (Sparus aurata)

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Tissue-specific gene signatures of gilthead sea bream (Sparus aurata L.) after hyper- and hypo-osmotic challenges

Project description:Euryhaline teleosts can live in a wide range of environmental salinities. Transcriptomic analysis in important osmoregulatory and non-osmoregulatory tissues (liver, gills and hypothalamus) by means of a specific oligo-microarray revealed new aspects related to the osmoregulatory processes mediated by different canonical pathways after hypo- or hyper-omotic challenges in gilthead sea bream (Sparus aurata) juveniles. Liver was the most responsive tissue to salinity changes. In addition, around 24 %, 8 % and 12 % of the total genes differentially expressed were affected and regulated in the same way (up- or down-regulated) by both hyper- and hypo-osmotic challenges in liver, gills and hypothalamus, respectively. In liver and gills, functional analysis of the differentially expressed genes established 2 major clusters of canonical pathways related to i) Energy Metabolism and ii) Oxidative Stress: Damage and Repair, whereas for hypothalamus only a main clusters linked to Oxidative Stress: Damage and Repair was identified. Further, this common cluster presents different sub-nodes in all analyzed tissues, with a clear dualism between liver and gills in those pathways involved in nitrogenous turnover, as well as between gills and hypothalamus in cell stress processes. In addition, several sub-nodes related to cell and tissue architecture was only found in hypothalamus. Moreover, only genes involved in xenobiotic metabolism signaling canonical pathway were differentially regulated by both hypo- and/or hyper-salinity transfer in the three tissues considered. Our results indicated that hepatic, branchial and hypothalamic transcriptome of the sea bream clearly responded after 7 days in different environmental salinities, when mainly metabolic and different cell functions are activated to reach homeostasis, or even return to their basal levels.

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