CtBP2 ChIP-seq normal mouse liver
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA525001 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR8649145.fastq.gz | Fastqsanger.gz | |||
| SRR8649146.fastq.gz | Fastqsanger.gz |
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Project description:Feeding behavior, a vital activity in the lives of all captive animals, is orchestrated by a delicate equilibrium between the orexigenic and anorexigenic activities of neurons in the hypothalamus. This exquisite control of neuropeptides governing the feeding behavior can be a focal point in the pathogenesis of obesity, and unraveling of the intricate transcriptional systems behind this may offer clues to develop approaches for better management of obese subjects. The transcriptional corepressor, C-terminal binding protein 2 (CtBP2), has been reported to be a metabolite-sensor inactivated in liver tissues and pancreatic β-cells in obesity. Here we describe a transcriptional system regulated by CtBP2 in hypothalamus. Our global mapping of CtBP2 binding sites by ChIP-seq reveals the recruitment of CtBP2 to the promoters of those neuropeptides as well as other key genes involved in the maintenance of hypothalamic neuronal activities. Whereas the expression of CtBP2 is not altered in obese mouse models, the recruitment of CtBP2 to the promoters of those neuropeptides is diminished in obesity, suggesting allosteric inactivation of CtBP2 in the metabolic milieu in obesity in this tissue. Exogenous expression of CtBP2 in hypothalamic cells decreases NPY gene promoter activity, and loss of CtBP2 in hypothalamic neurons in mice increases expression levels of orexigenic neuropeptides. These findings illustrate a sequential event where obesity promotes orexigenic behavior through metabolic inactivation of CtBP2. Our findings underscore a previously unexplored layer within the redundant transcriptional systems that regulate the hypothalamic feeding circuitry.
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Project description:Feeding behavior, a vital activity in the lives of all captive animals, is orchestrated by a delicate equilibrium between the orexigenic and anorexigenic activities of neurons in the hypothalamus. This exquisite control of neuropeptides governing the feeding behavior can be a focal point in the pathogenesis of obesity, and unraveling of the intricate transcriptional systems behind this may offer clues to develop approaches for better management of obese subjects. The transcriptional corepressor, C-terminal binding protein 2 (CtBP2), has been reported to be a metabolite-sensor inactivated in liver tissues and pancreatic β-cells in obesity. Here we describe a transcriptional system regulated by CtBP2 in hypothalamus. Our global mapping of CtBP2 binding sites by ChIP-seq reveals the recruitment of CtBP2 to the promoters of those neuropeptides as well as other key genes involved in the maintenance of hypothalamic neuronal activities. Whereas the expression of CtBP2 is not altered in obese mouse models, the recruitment of CtBP2 to the promoters of those neuropeptides is diminished in obesity, suggesting allosteric inactivation of CtBP2 in the metabolic milieu in obesity in this tissue. Exogenous expression of CtBP2 in hypothalamic cells decreases NPY gene promoter activity, and loss of CtBP2 in hypothalamic neurons in mice increases expression levels of orexigenic neuropeptides. These findings illustrate a sequential event where obesity promotes orexigenic behavior through metabolic inactivation of CtBP2. Our findings underscore a previously unexplored layer within the redundant transcriptional systems that regulate the hypothalamic feeding circuitry.
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