Enchytraeus albidus
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ABSTRACT:
PROVIDER: PRJNA150561 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Background: Molecular mechanisms of response to pesticides are scarce and information on such responses from soil invertebrates is almost inexistent. Enchytraeus albidus (Oligochaeta) is a standard soil ecotoxicology model species for which effects of many pesticides are known on survival, reproduction and avoidance behaviour. With the recent microarray development additional information can be retrieved on the molecular effects. Methodology/Principal Findings: Experiments were performed to investigate the transcription responses of E. albidus when exposed to three pesticides M-bM-^@M-^S dimethoate (insecticide), atrazine (herbicide) and carbendazim (fungicide) M-bM-^@M-^S in a range of concentrations that inhibited reproduction by 10%, 20%, 50% and 90% (EC10, EC20, EC50 and EC90, respectively). The goal of this study was to further identify key biological processes affected by each compound and if dose-related. All three pesticides significantly affected biological processes like translation, regulation of the cell cycle or general response to stress. Intracellular signalling and microtubule-based movement were affected by dimethoate and carbendazim whereas atrazine affected lipid and steroid metabolism (also by dimethoate) or carbohydrate metabolism (also by carbendazim). Response to DNA damage/DNA repair was exclusively affected by carbendazim. Conclusions: Changes in gene expression were significantly altered after 2 days of exposure in a dose-related manner. The mechanisms of response were comparable with the ones for mammals, suggesting across species conserved modes of action. The present results indicate the potential of using gene expression in risk assessment and the advantage as early markers. Gene expression in E.albidus was measured at 2 days after exposure to dimethoate, atrazine and carbendazim at 4 concentrations of effect on reprocduction (EC10, EC20, EC50 and EC90). Three biological replicates per treatment were used.
2012-05-27 | E-GEOD-33945 | biostudies-arrayexpress
Project description:Background: Molecular mechanisms of response to pesticides are scarce and information on such responses from soil invertebrates is almost inexistent. Enchytraeus albidus (Oligochaeta) is a standard soil ecotoxicology model species for which effects of many pesticides are known on survival, reproduction and avoidance behaviour. With the recent microarray development additional information can be retrieved on the molecular effects. Methodology/Principal Findings: Experiments were performed to investigate the transcription responses of E. albidus when exposed to three pesticides – dimethoate (insecticide), atrazine (herbicide) and carbendazim (fungicide) – in a range of concentrations that inhibited reproduction by 10%, 20%, 50% and 90% (EC10, EC20, EC50 and EC90, respectively). The goal of this study was to further identify key biological processes affected by each compound and if dose-related. All three pesticides significantly affected biological processes like translation, regulation of the cell cycle or general response to stress. Intracellular signalling and microtubule-based movement were affected by dimethoate and carbendazim whereas atrazine affected lipid and steroid metabolism (also by dimethoate) or carbohydrate metabolism (also by carbendazim). Response to DNA damage/DNA repair was exclusively affected by carbendazim. Conclusions: Changes in gene expression were significantly altered after 2 days of exposure in a dose-related manner. The mechanisms of response were comparable with the ones for mammals, suggesting across species conserved modes of action. The present results indicate the potential of using gene expression in risk assessment and the advantage as early markers.
2012-05-28 | GSE33945 | GEO
Project description:Transcriptional responses in Enchytraeus albidus (Oligochaeta): comparison between cadmium and zinc exposure and linkage to reproduction effects
| PRJNA150559 | ENA
Project description:Enchytraeus albidus Transcriptome or Gene expression
| PRJNA386732 | ENA
Project description:Mechanisms of response to silver nanoparticles Enchytraeus albidus (Oligochaeta): survival, reproduction and gene expression profile
| PRJNA182376 | ENA
Project description:Standard bioassays allow hazard assessment at the population level, but much remains to be learned about the molecular level response of organisms to stressors. The main aim of this study was the development of a DNA microarray for Enchytraeus albidus, a common soil worm species. Further, this microarray was tested using worms exposed to Cu, phenmedipham, and different soil types. Hybridization onto the developed microarray revealed several genes with homology to known sequences. Genes of interest were confirmed through real-time polymerase chain reaction. It was possible to discriminate between natural and chemical stressors and chemical concentrations. Gene responses were detected under conditions known to have effects in the reproduction of individuals. It was confirmed that the integration of different endpoints improves the assessment process and enhances the understanding of the modes of action of stressors. The chemical stress–induced genes were related to factors such as immune response, stress response, metabolic processes, and/or signal transduction. The present study represents the first step of a gene-level study in the ecologically relevant and standard test species E. albidus. It demonstrates the usefulness of cDNA normalization in the production of cDNA libraries of ecotoxicological standard organisms that are not genome models like E. albidus.
2011-03-30 | GSE18569 | GEO
Project description:Normal gene expression variation in Enchytraeus albidus - transcriptional responses to control conditions
| PRJNA196322 | ENA
Project description:Metal ecotoxicity on soil organisms, e.g. in Enchytraeids (also known as potworms), has been addressed mainly by assessing effects on survival and reproduction but very little is known about the molecular underlying mechanisms of responses. The main purpose of the present study was to assess and compare the transcriptional responses of Enchytraeus albidus to an essential (zinc) and a non-essential metal (cadmium). Exposure was performed to two concentrations of known effect on reproduction (EC50, EC90) at three time periods (2, 4 and 8 days). Results showed that transcriptional responses were influenced by exposure duration but, independently of that, the mechanisms of response to Cd and Zn were consistently different. Both metals affected pathways related with the regulation of gene expression, calcium homeostasis and cellular respiration. Mechanisms of toxicity that were exclusively associated with Cd exposures were the inhibition of DNA repair and the impairment of ubiquitin-mediated proteolysis. The microarray for E. albidus was a useful tool to detect molecular pathways affected by metal exposures. Transcriptional responses strongly correlated with known mechanisms of Cd and Zn responses in other organisms, suggesting cross-species conserved mechanisms of action. It should be highlighted that we could not only retrieve mechanistic information, but also that genes responded within 2-8 days of exposure. This represents an additional advantage of using such molecular endpoints as a complement to the traditional, more time-consuming endpoints.
2012-07-01 | GSE33944 | GEO
Project description:Metals, including copper (Cu) and nickel (Ni) are among the most common contaminants in soils in Europe. Although their effects are relatively well known regarding survival and reproduction of soil invertebrates, their modes of action in these organisms are still poorly studied. Enchytraeus albidus has been used in soil ecotoxicology for many years, and more recently has a gene library and an oligonucleotide microarray for this species which allowed gene expression studies. This has potentiated the means to study further in depth the mechanisms of response to stressors. The main aim of this study is to understand the mechanisms of response of E. albidus to Cu and Ni. For that we have 1) assessed and compared the transcriptomic profile of E. albidus in response to Cu and Ni and 2) compared the Cu, Ni, Cd and Zn transcriptomic profiles. For the microarray hybridizations, E. albidus were exposed to the reproduction effect concentrations EC50 and EC90 of Cu and Ni during 4 days. Results indicate that Cu and Ni have to some extent, similar mechanisms of toxicity and that have already been identified in other species, indicating cross-species conserved mechanisms. Based on hierarchical clustering, it was possible to observe a clear separation of Cd treatments from all other metals. This separation strongly correlates with the available information regarding the toxicokinetics of the tested metals, in which Ni shows properties similar to essential metals.
2013-12-31 | GSE47662 | GEO