Plasmidome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA983705 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR28553315_1.fastq.gz | Fastqsanger.gz | |||
| SRR28553315_2.fastq.gz | Fastqsanger.gz | |||
| SRR28553316_1.fastq.gz | Fastqsanger.gz | |||
| SRR28553316_2.fastq.gz | Fastqsanger.gz | |||
| SRR28553317_1.fastq.gz | Fastqsanger.gz |
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Project description:Arctic charr thrive at high densities and can live in freshwater year round, making this species especially suitable for inland, closed containment aquaculture. However, it is a cold water salmonid, which both limits where the species can be farmed and places wild populations at particular risk to climate change. Previously, we identified genes associated with tolerance and intolerance to acute, lethal temperature stress in Arctic charr. However, there remained a need to examine the genes involved in the stress response to more realistic temperatures that could be experienced during a summer heat wave in grow-out tanks that are not artificially cooled, or under natural conditions. Here, we exposed Arctic charr to moderate heat stress of 15–18ºC for 72 hours, and gill tissues extracted before, during (i.e., at 72 hrs), immediately after cooling and after 72 hours of recovery at ambient temperature (6ºC) were used for gene expression profiling by microarray and qPCR analyses. The results revealed an expected pattern for heat shock protein (Hsp) expression, which was highest during heat exposure, with significantly reduced expression (approaching control levels) quickly thereafter. We also found that the expression of numerous ribosomal proteins was significantly elevated immediately and 72 hrs after cooling, suggesting that the gill tissues were undergoing ribosomal biogenesis while recovering from damage caused by heat stress. We suggest that these are candidate gene targets for the future development of genetic markers for broodstock development or for monitoring temperature stress and recovery in wild or cultured conditions.
2011-07-05 | GSE29610 | GEO
Project description:Arctic charr thrive at high densities and can live in freshwater year round, making this species especially suitable for inland, closed containment aquaculture. However, it is a cold water salmonid, which both limits where the species can be farmed and places wild populations at particular risk to climate change. Previously, we identified genes associated with tolerance and intolerance to acute, lethal temperature stress in Arctic charr. However, there remained a need to examine the genes involved in the stress response to more realistic temperatures that could be experienced during a summer heat wave in grow-out tanks that are not artificially cooled, or under natural conditions. Here, we exposed Arctic charr to moderate heat stress of 15–18ºC for 72 hours, and gill tissues extracted before, during (i.e., at 72 hrs), immediately after cooling and after 72 hours of recovery at ambient temperature (6ºC) were used for gene expression profiling by microarray and qPCR analyses. The results revealed an expected pattern for heat shock protein (Hsp) expression, which was highest during heat exposure, with significantly reduced expression (approaching control levels) quickly thereafter. We also found that the expression of numerous ribosomal proteins was significantly elevated immediately and 72 hrs after cooling, suggesting that the gill tissues were undergoing ribosomal biogenesis while recovering from damage caused by heat stress. We suggest that these are candidate gene targets for the future development of genetic markers for broodstock development or for monitoring temperature stress and recovery in wild or cultured conditions. 24 microarray slides representing 6 individuals from 4 treatment groups (Control, During, After and Recovery). One test cDNA labeled with Cy5 and the common reference aRNA labeled with Cy3 was hybridized to each slide. Reference design: 6x control fish, 6x group D fish, 6x group A fish, 6x group R fish.
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Project description:C5aR1, a receptor for the complement activation proinflammatory fragment, C5a, is primarily expressed on cells of the myeloid lineage, and to a lesser extent on endothelial cells and neurons in brain. Previous work demonstrated C5aR1 antagonist, PMX205, decreased amyloid pathology and suppressed cognitive deficits in Alzheimer Disease (AD) mouse models. In the Arctic AD mouse model, genetic deletion of C5aR1 prevented behavior deficits at 10 months. However, the molecular mechanisms of this protection has not been definitively demonstrated. To understand the role of microglial C5aR1 in the Arctic AD mouse model, we have taken advantage of the CX3CR1GFP and CCR2RFP reporter mice to distinguish microglia as GFP-positive and infiltrating monocytes as GFP and RFP positive, for subsequent transcriptome analysis on specifically sorted myeloid populations from wild type and AD mouse models. Immunohistochemical analysis of mice aged to 2, 5, 7 and 10 months showed no change in amyloid beta (Ab) deposition in the Arctic C5aR1 knockout (KO) mice relative to that seen in the Arctic mice. Of importance, no CCR2+ monocytes/macrophages were found near the plaques in the Arctic brain with or without C5aR1. RNA-seq analysis on microglia from these mice identified inflammation related genes as differentially expressed, with increased expression in the Arctic mice relative to wildtype and decreased expression in the Arctic/C5aR1KO relative to Arctic. In addition, phagosomal-lysosomal proteins and protein degradation pathways that were increased in the Arctic mice were further increased in the Arctic/C5aR1KO mice. These data are consistent with a microglial polarization state with restricted induction of inflammatory genes and enhancement of clearance pathways.
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