Ontology highlight
ABSTRACT:
PROVIDER: PRJNA381689 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5416870.fastq.gz | Fastqsanger.gz | |||
| SRR5416871.fastq.gz | Fastqsanger.gz | |||
| SRR5416872.fastq.gz | Fastqsanger.gz | |||
| SRR5416873.fastq.gz | Fastqsanger.gz | |||
| SRR5416864.fastq.gz | Fastqsanger.gz |
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Project description:Group living animals must be able to express different behavior profiles depending on their social status. This implies that the same genotype may translate into different behavioral phenotypes through socially driven differential gene expression. Here we show for the first time that what triggers the switch between status-specific neurogenomic states is not the objective structure of the social interaction but rather the subjectsM-bM-^@M-^Y perception of its outcome. For this purpose we had male zebrafish fight either a real opponent or their own image on a mirror. Massive changes in the brain transcriptome were observed in real opponent fighters, which experience either a victory or a defeat. In contrast, mirror fighters, which had no information on fight outcome despite expressing aggressive behavior, failed to activate a neurogenomic response. These results indicate that, even in cognitively simple organisms such as zebrafish, neurogenomic responses underlying changes in social status rely on cognitive appraisal. Brain samples from zebrafish, Danio rerio were collected after experimental manipulations generated 4 phenotypes regarding social experience: mirror fighters (M), winners of a real opponent fight (W), losers of a real opponent fight (L); and socially isolated fish (I). After 30 minutes of experimental manipulation animals were anesthetized with a lethal dose of MS-222 (1000-1500 mg/l) and decapitated. Brains were rapidly collected, homogenized and RNA extracted following standard methods of RNeasy Lipid Tissue Mini Kit, Qiagen. RNA was then treated with DNase (RNase-free DNase set, Qiagen) to remove possible contaminations with genomic DNA and concentration and purity was estimated by spectrophotometric absorbance in a NanoDrop ND-1000 UV-Vis Spectrophotometer (Nano-Drop Technologies).
2014-04-10 | E-GEOD-56549 | biostudies-arrayexpress
Project description:Group living animals must be able to express different behavior profiles depending on their social status. This implies that the same genotype may translate into different behavioral phenotypes through socially driven differential gene expression. Here we show for the first time that what triggers the switch between status-specific neurogenomic states is not the objective structure of the social interaction but rather the subjects’ perception of its outcome. For this purpose we had male zebrafish fight either a real opponent or their own image on a mirror. Massive changes in the brain transcriptome were observed in real opponent fighters, which experience either a victory or a defeat. In contrast, mirror fighters, which had no information on fight outcome despite expressing aggressive behavior, failed to activate a neurogenomic response. These results indicate that, even in cognitively simple organisms such as zebrafish, neurogenomic responses underlying changes in social status rely on cognitive appraisal.
2014-04-10 | GSE56549 | GEO
Project description:Motherhood is characterized by dramatic changes in brain and behavior, but less is known about fatherhood. Here we report that male sticklebacks – a small fish in which fathers provide care – experience dramatic changes in neurogenomic state as they become fathers. Some genes are unique to different stages of paternal care, some genes are shared across stages, and some genes are added to the previously acquired neurogenomic state. Comparative genomic analysis suggests that some of these neurogenomic dynamics resemble changes associated with pregnancy and reproduction in mammalian mothers. Moreover, gene regulatory analysis identified transcription factors that are regulated in opposite directions in response to a territorial challenge versus during paternal care. Altogether these results show that some of the molecular mechanisms of parental care might be deeply conserved and might not be sex-specific, and suggest that tradeoffs between opposing social behaviors are managed at the gene regulatory level.
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Project description:Offspring are often influenced by the care they receive from their parents. However, we know little about the underlying neurogenomic mechanisms. Using a half-sib design, threespine stickleback fish were either raised by their fathers or hand-reared (“orphaned”). As offspring developed, they were tested in one of three behavioural assays: an open field assay with a simulated predator attack, a social behaviour assay with a simulated predator attack, and a scototaxis assay. Offspring that received parental care were bolder, more social, and less anxious. Fish in the open field assay had their brains sampled one hour following the simulated attack; brains were sampled at the same time from full-sib controls. These brains were processed for gene expression (via Tag-seq) and chromatin accessibility (via ATAC-seq). Experiencing paternal care affected brain gene expression, but sex was also a major factor, despite the fish being reproductively immature. The predator attack in the open field assay affected expression of fewer genes. Sex, and to lesser extent, paternal care, also influenced chromatin accessibility at a whole genome scale. Our findings further our understanding of the mechanistic basis for offspring response to variation in the care they receive from their parents.
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Project description:Offspring are often influenced by the care they receive from their parents. However, we know little about the underlying neurogenomic mechanisms. Using a half-sib design, threespine stickleback fish were either raised by their fathers or hand-reared (“orphaned”). As offspring developed, they were tested in one of three behavioural assays: an open field assay with a simulated predator attack, a social behaviour assay with a simulated predator attack, and a scototaxis assay. Offspring that received parental care were bolder, more social, and less anxious. Fish in the open field assay had their brains sampled one hour following the simulated attack; brains were sampled at the same time from full-sib controls. These brains were processed for gene expression (via Tag-seq) and chromatin accessibility (via ATAC-seq). Experiencing paternal care affected brain gene expression, but sex was also a major factor, despite the fish being reproductively immature. The predator attack in the open field assay affected expression of fewer genes. Sex, and to lesser extent, paternal care, also influenced chromatin accessibility at a whole genome scale. Our findings further our understanding of the mechanistic basis for offspring response to variation in the care they receive from their parents.
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Project description:We studied behavioral, brain transcriptomic and epigenetic responses of honey bees to social challenge. Bees were exposed to two intruders at different intervals. The initial exposure caused two behavioral effects at the individual level: an increase in the intensity of aggression toward a second intruder at 30 and 60 minutes, and an increased probability of responding aggressively toward a second intruder that persisted for two hours. The shorter-lived response was associated with one pattern of gene expression in the mushroom bodies, highlighted by genes related to cytoskeleton remodeling. The longer-lived response was associated with a different pattern; highlighted by genes related to hormones, stress response and transcription factors. Histone profiling revealed few changes in chromatin accessibility in response to social challenge; most differentially expressed genes were “ready” to be activated. These results demonstrate how biological embedding of a social challenge involves changes in the neurogenomic state to influence future behavior.
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Project description:Neuronal activity causes the rapid expression of immediate early genes that are crucial for experience driven changes to synapses, learning, and memory. Here, using both molecular and genome-wide next generation sequencing methods, we report that neuronal activity stimulation triggers the formation of DNA double strand breaks (DSBs) in the promoters of a subset of early-response genes, including Fos, Npas4, and Egr1. Generation of targeted DNA DSBs within Fos and Npas4 promoters is sufficient to induce their expression even in the absence of an external stimulus. Activity-dependent DSB formation is likely mediated by the type II topoisomerase, Topoisomerase IIb (Topo IIb), and knockdown of Topo IIb attenuates both DSB formation and early response gene expression following neuronal stimulation. Our results suggest that DSB formation is a physiological event that rapidly resolves topological constraints to early-response gene expression in neurons. Generation of sequencing data from ChIP-seq with antibodies against γH2AX and Topo IIβ after neuronal activity stimulation, and RNA-seq after etoposide treatment
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Project description:Social plasticity is a pervasive feature of animal behavior. Animals adjust the expression of their social behavior to the daily changes in social life and to transitions between life-history stages, and the ability to change in these ways impacts their Darwinian fitness. This behavioral plasticity may be achieved either by rewiring or by biochemically switching nodes of the neural network underlying the social behavior in response to perceived social information. Independent of the proximate mechanisms, at the neuromolecular level social plasticity relies on the regulation of gene expression, such that different neurogenomic states emerge in response to different social stimuli and the switches between states are orchestrated by signaling pathways that interface the social environment and the genotype. Here, we test this hypothesis by characterizing the changes in the brain profile of gene expression in response to social odors in the Mozambique Tilapia, Oreochromis mossambicus. This species has a rich repertoire of social behaviors during which both visual and chemical information are conveyed to conspecifics. Specifically, dominant males increase their urination frequency during agonist encounters and during courtship to convey chemical information reflecting their dominance status. We recorded electro-olfactograms to test the extent to which the olfactory epithelium can discriminate between olfactory information from dominant and subordinate males as well as from pre- and post-spawning females. We then performed a genome-scale gene expression analysis of the olfactory bulb and the olfactory cortex homolog in order to identify the neuromolecular systems involved in processing these social stimuli. Our results show that different olfactory stimuli from conspecificsM-bM-^@M-^Y have a major impact in the brain transcriptome, with different chemical social cues eliciting specific patterns of gene expression in the brain. These results confirm the role of rapid changes in gene expression in the brain as a genomic mechanism underlying behavioural plasticity and reinforce the idea of an extensive transcriptional plasticity of cichlid genomes, especially in response to rapid changes in their social environment. Brain samples from 40 African cichlid males, Oreochromis mossambicus were collected after stimulation with different social olfactory stimuli. Samples were collected from 2 brain areas: BO and Dp after males were exposed to dominant (DOM) and subordinate (SUB) male urine and pre- (PRE) and post-ovulatory (POST) female scent. In OB 5 replicates were collected from males exposed to DOM and 6 to the other stimuli. For Dp 5 replicates were collected from males exposed to DOM and POST, 4 to SUB and 6 to PRE.
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