Rattus norvegicus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA387915 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5597240.fastq.gz | Fastqsanger.gz | |||
| SRR5597241.fastq.gz | Fastqsanger.gz | |||
| SRR5597236.fastq.gz | Fastqsanger.gz | |||
| SRR5597237.fastq.gz | Fastqsanger.gz | |||
| SRR5597238.fastq.gz | Fastqsanger.gz |
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Project description:The quality of maternal care in early-life plays a crucial role in mammalian neurodevelopment. Augmented maternal care (AMC) is a well-established rodent model of enhanced neonatal care. Rats that have undergone AMC have improved stress resilience and cognition compared with rats that have experienced normal levels of maternal care or adverse neonatal stress. However, the epigenomic basis of long-lived responses to AMC has not been previously explored. Thus, we employed whole-genome bisulfite sequencing (WGBS), RNA-sequencing (RNA-seq), and a multiplex microRNA (miRNA) assay to assess DNA cytosine methylation, gene expression, and miRNA expression, respectively. The integrated results identify a suite of 20 prioritized candidates impacted by AMC. Overall, these results identified AMC-induced regulatory differences in genes related to neurotransmission, neurodevelopment, protein synthesis, and oxidative phosphorylation in addition to the expected stress response genes. Together, these unbiased results represent a key progression in understanding the complex mechanisms underlying the early-life mechanisms for AMC programming stress resiliency.
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Project description:The quality of maternal care in early-life plays a crucial role in mammalian neurodevelopment. Augmented maternal care (AMC) is a well-established rodent model of enhanced neonatal care. Rats that have undergone AMC have improved stress resilience and cognition compared with rats that have experienced normal levels of maternal care or adverse neonatal stress. However, the epigenomic basis of long-lived responses to AMC has not been previously explored. Thus, we employed whole-genome bisulfite sequencing (WGBS), RNA-sequencing (RNA-seq), and a multiplex microRNA (miRNA) assay to assess DNA cytosine methylation, gene expression, and miRNA expression, respectively. The integrated results identify a suite of 20 prioritized candidates impacted by AMC. Overall, these results identified AMC-induced regulatory differences in genes related to neurotransmission, neurodevelopment, protein synthesis, and oxidative phosphorylation in addition to the expected stress response genes. Together, these unbiased results represent a key progression in understanding the complex mechanisms underlying the early-life mechanisms for AMC programming stress resiliency.
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Project description:Maternal care is associated with long-term effects on behavior and epigenetic programming of the NR3C1 (GLUCOCORTICOID RECEPTOR) gene in the hippocampus of both rats and humans. However, epigenetic changes at a single gene promoter are unlikely to account for the range of responses to the early life environment and the persistent change in expression of hundreds of additional genes in adult rats in response to differences in maternal care. Here we show that natural variations in maternal care are associated with coordinate changes in DNA methylation, chromatin, and gene expression spanning over a hundred kilobase pairs in the hippocampus of adult rats. The offspring of high compared to low maternal care mothers show epigenetic changes in promoters, exons, and gene ends and higher transcriptional activity across many genes, suggesting that a broad epigenetic regulation of gene expression may form part of a coordinated response to early maternal care. We obtained hippocampal samples from adult offspring of rat mothers that differed in the frequency of pup licking/grooming in the first week of life, 4 from high frequency and 4 from low frequency mothers. Using custom-designed microarrays with probes tiling the 7 million base pair region of rat chromosome 18 centered at the NR3C1 gene at 100 bp spacing, we obtained transcription profiles by hybridizing cDNA to microarrays. Each profile was generated in duplicate.
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Project description:Maternal care is associated with long-term effects on behavior and epigenetic programming of the NR3C1 (GLUCOCORTICOID RECEPTOR) gene in the hippocampus of both rats and humans. However, epigenetic changes at a single gene promoter are unlikely to account for the range of responses to the early life environment and the persistent change in expression of hundreds of additional genes in adult rats in response to differences in maternal care. Here we show that natural variations in maternal care are associated with coordinate changes in DNA methylation, chromatin, and gene expression spanning over a hundred kilobase pairs in the hippocampus of adult rats. The offspring of high compared to low maternal care mothers show epigenetic changes in promoters, exons, and gene ends and higher transcriptional activity across many genes, suggesting that a broad epigenetic regulation of gene expression may form part of a coordinated response to early maternal care.
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