Mytilus galloprovincialis
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ABSTRACT:
PROVIDER: PRJNA246492 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:The contamination of marine ecosystems with microplastics, such as the polymer polyethylene, a commonly used component of single-use packaging, is of global concern. Although it has been suggested that biodegradable polymers, such as polylactic acid, may be used to replace some polyethylene packaging, little is known about their effects on marine organisms. Blue mussels, Mytilus edulis, have become a “model organism” for investigating the effects of microplastics in marine ecosystems. We show here that repeated exposure, over a period of 52 days in an outdoor mesocosm setting, of M. edulis to polyethylene microplastics reduced the number of byssal threads produced and the attachment strength (tenacity) by ~50%. Exposure to either type of microplastic altered the haemolymph proteome and, although a conserved response to microplastic exposure was observed, overall polyethylene resulted in more changes to protein abundances than polylactic acid. Many of the proteins affected are involved in vital biological processes, such as immune- and stress- regulation, metabolism and cellular and structural development. Our study highlights the utility of mass spectrometry-based proteomics to assess the health of key marine organisms and identifies the potential mechanisms by which microplastics, both conventional and biodegradable, could affect their ability to form and maintain reefs.
2019-01-02 | PXD011567 | Pride
Project description:Transcriptional profiling of mussel (Mytilus galloprovincialis) digestive gland tissue comparing control tissue with tissue obtained from animals exposed for four days to sublethal amounts of Nickel, Chlorpyrifos, or their mixture. Background: Mixtures of chemicals present in aquatic environments may elicit toxicity due to additive or synergistic effects among the constituents or ‘vice versa’ the adverse outcome may be reduced by antagonistic interactions. Deviations from additivity should be explained either by the perturbations of toxicokinetic parameters and/or chemical toxicodynamics. We addressed this important question in marine mussels exposed subchronically to a binary mixture made of two wide-spread pollutants: the heavy metal Nickel and the organic phosphorus pesticide Chlorpyrifos. To this aim, we proposed the use of a systems approach based on the evaluation and integration of different disciplines, i.e. high throughput gene expression profiling, functional genomics, stress biomakers and toxicokinetics. Results: Stress biomarkers showed statistically significant antagonistic deviations from the reference model systems to predict mixture toxicity which are based either on simple additivity or non-interaction. While toxicokinetic modeling did not explain mixture interactions, gene expression profiling and further functional genomics analysis provided clues that the decrement of toxicity may arise from the development of specific toxicodynamics. Multivariate statistics of microarray and quantitative PCR data showed two separate patterns for the single chemicals and a composite complex profile for the mixture suggesting the occurrence of interactive molecular responses. The latter signature accounted for differentially expressed genes whose relative expression values were either in trend or in contrast with those found due to single substance treatments and a relevant set of sequences which were exclusive of the mixture gene list. Conclusion: The functional genomics assessment fits with biological data to indicate the occurrence of different toxicodynamic events and ‘in general’ a decrease of toxicity, driven by the mitigation or even abolishment of lysosomal responses such as the lipid metabolic disorder observed exclusively in single chemical-exposed samples. Furthermore, our results emphasized the importance of the application of mechanistic approaches and the power of systems assessment to study toxicological responses in ecological relevant organisms.
2011-12-31 | GSE21229 | GEO
Project description:Microplastics represent a growing environmental concern for the oceans due to their potential capability to adsorb different classes of pollutants, thus representing a still unexplored source of exposure for aquatic organisms. In this study polystyrene (PS) microplastics were characterized for their capability to adsorb pyrene (PYR) as model compound for polycyclic aromatic hydrocarbons, and transfer this chemical to filter feeding mussels Mytilus galloprovincialis. Gene expression analyses of Mytilus galloprovincialis exposed to polystyrene (PS) microplastics and to polystyrene contaminated with pyrene (PS-PYR) have been performed trough a DNA microarray platform.
2014-12-27 | GSE57460 | GEO
Project description:Transcriptional profiling of the mantle tissue across the four stages of male gonads development (winter peak) in a natural population of the marine mussel Mytilus galloprovincialis sampled in the Bizerta Lagoon, Tunisia, across November 2007 -March 2008. Background: Seasonal environmental changes may affect the physiology of Mytilus galloprovincialis (Lam.), an intertidal filter-feeder bivalve occurring commonly in Mediterranean and Atlantic coastal areas. We investigated seasonal variations in relative transcript abundance of the digestive gland and the mantle (gonads) of males and females. To identify gene expression trends, we used a medium-density cDNA microarray (1.7 K probes) in dual-color competitive hybridization analyses. Results: Hierarchical clustering of digestive gland microarray data showed two main branches, distinguishing profiles associated with the “hot” months (May–August) from the other months. Genes involved in chitin metabolism, associated with mussel nutrition and digestion, showed higher expression during summer. Moreover, we found different gene expression patterns in the digestive glands of males and females during the four stages of mussel gonadal development. Microarray data from gonadal transcripts also displayed clear patterns during the different developmental phases with peak relative mRNA abundance at the ripe phase (stage III) for both sexes. Conclusion: These data showed a clear temporal pattern in gene expression profiles of mussels sampled over an annual cycle. Physiological response to thermal variation, food availability, and reproductive status across months may contribute to variation in gene expression.
2011-06-06 | GSE23050 | GEO
Project description:Transcriptional profiling of the mantle tissue across the four stages of female gonads development (winter peak) in a natural population of the marine mussel Mytilus galloprovincialis sampled in the Bizerta Lagoon, Tunisia, across November 2007 -March 2008. Background: Seasonal environmental changes may affect the physiology of Mytilus galloprovincialis (Lam.), an intertidal filter-feeder bivalve occurring commonly in Mediterranean and Atlantic coastal areas. We investigated seasonal variations in relative transcript abundance of the digestive gland and the mantle (gonads) of males and females. To identify gene expression trends, we used a medium-density cDNA microarray (1.7 K probes) in dual-color competitive hybridization analyses. Results: Hierarchical clustering of digestive gland microarray data showed two main branches, distinguishing profiles associated with the “hot” months (May–August) from the other months. Genes involved in chitin metabolism, associated with mussel nutrition and digestion, showed higher expression during summer. Moreover, we found different gene expression patterns in the digestive glands of males and females during the four stages of mussel gonadal development. Microarray data from gonadal transcripts also displayed clear patterns during the different developmental phases with peak relative mRNA abundance at the ripe phase (stage III) for both sexes. Conclusion: These data showed a clear temporal pattern in gene expression profiles of mussels sampled over an annual cycle. Physiological response to thermal variation, food availability, and reproductive status across months may contribute to variation in gene expression.
2011-06-06 | GSE23049 | GEO
Project description:Heat and nickel induced mRNA changes in mussels
| PRJNA208837 | ENA
Project description:Heat and copper induced mRNA changes in mussels
| PRJNA178507 | ENA
Project description:Transcriptional profiling of mussel (Mytilus galloprovincialis) digestive gland tissue comparing control tissue with tissue obtained from animals exposed for four days to sublethal amounts of Nickel, Chlorpyrifos, or their mixture. Background: Mixtures of chemicals present in aquatic environments may elicit toxicity due to additive or synergistic effects among the constituents or ‘vice versa’ the adverse outcome may be reduced by antagonistic interactions. Deviations from additivity should be explained either by the perturbations of toxicokinetic parameters and/or chemical toxicodynamics. We addressed this important question in marine mussels exposed subchronically to a binary mixture made of two wide-spread pollutants: the heavy metal Nickel and the organic phosphorus pesticide Chlorpyrifos. To this aim, we proposed the use of a systems approach based on the evaluation and integration of different disciplines, i.e. high throughput gene expression profiling, functional genomics, stress biomakers and toxicokinetics. Results: Stress biomarkers showed statistically significant antagonistic deviations from the reference model systems to predict mixture toxicity which are based either on simple additivity or non-interaction. While toxicokinetic modeling did not explain mixture interactions, gene expression profiling and further functional genomics analysis provided clues that the decrement of toxicity may arise from the development of specific toxicodynamics. Multivariate statistics of microarray and quantitative PCR data showed two separate patterns for the single chemicals and a composite complex profile for the mixture suggesting the occurrence of interactive molecular responses. The latter signature accounted for differentially expressed genes whose relative expression values were either in trend or in contrast with those found due to single substance treatments and a relevant set of sequences which were exclusive of the mixture gene list. Conclusion: The functional genomics assessment fits with biological data to indicate the occurrence of different toxicodynamic events and ‘in general’ a decrease of toxicity, driven by the mitigation or even abolishment of lysosomal responses such as the lipid metabolic disorder observed exclusively in single chemical-exposed samples. Furthermore, our results emphasized the importance of the application of mechanistic approaches and the power of systems assessment to study toxicological responses in ecological relevant organisms. Mussel MytArray 1.0 (Platform GPL1799)-based arrays: Three-condition experiment. Dual color competitive hybridizations. Common reference (vehicle treated animals, 0.02% Dimethyl sulfoxide); Pools of six animals. Biological replicates: 4 controls, 4 Nickel, 4 Chlorpyrifos. One replicate per array. Mussel MytArray 1.1 (Platform GPL10269)-based arrays: Four-condition experiment. Dual color competitive hybridizations. Common reference (vehicle treated animals, 0.02% Dimethyl sulfoxide); Pools of six animals. Biological replicates: 5 controls, 1 Nickel, 3 Chlorpyrifos, 5 mixture. One replicate per array.
2011-12-31 | E-GEOD-21229 | biostudies-arrayexpress
Project description:TCDD and n-TiO2 induced mRNA changes in mussels
| PRJNA287004 | ENA
Project description:Mussels (Mytilus galloprovincialis) were exposed during 7 and 28 days in seawater (control), seawater + acetone (solvent control, SC), and 10 micrograms per Litre of tris(1,3-dichloro-2-propyl) phosphate (TDCPP). TDCPP was added from a stock solution prepared in acetone, the volume added being 100 µL per 30 L aquaria. The same volume of acetone was added to SC aquaria. Mussel density was 20 mussels per each 30 L aquaria at the beginning of the experiment and varied between 15 ‒ 20 mussels/30 L aquaria during the 28 days exposure period. Exposure conditions were the following: T = 15.6 ± 0.7 ºC, S = 35.5 ± 0.5 ppt, pH = 7.9 ± 0.1, O2 = 7.9 ± 0.6 mg L-1 and 10:14h light:dark photoperiod. Water was renewed twice per week and mussels were fed before every water renewal with a mixture of phytoplankton representing 1% of mussel tissue dry weight.
2020-12-14 | PXD019720 | Pride