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Transcriptomic Changes in Adult Hypothalamic Neurons Following Leptin Sensitivity Modulation

ABSTRACT: Transcriptomic Changes in Adult Hypothalamic Neurons Following Leptin Sensitivity Modulation

PROVIDER: PRJNA1175987 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31071066.fastq.gz	Fastqsanger.gz
	SRR31071067.fastq.gz	Fastqsanger.gz
	SRR31071068.fastq.gz	Fastqsanger.gz
	SRR31071069.fastq.gz	Fastqsanger.gz
	SRR31071070.fastq.gz	Fastqsanger.gz

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Transcriptomic Changes in Adult Hypothalamic Neurons Following Leptin Sensitivity Modulation

Project description:Modulating leptin sensitivity in hypothalamic neurons is critical for metabolic regulation and plays a key role in the development of obesity. This study examines the effects of three distinct approaches—leptin exposure (LEPA), leptin antagonist administration (LANTA), and palmitate treatment (PA)—on adult-derived mHypoA-2/12 neurons. Transcriptomic analysis using 3' mRNA-Seq revealed significant downregulation of several pathways, including the NOD-like receptor signaling pathway, C-type lectin receptor signaling pathway, NF-κB signaling pathway, and IL-17 signaling pathway. These pathways are closely linked to neuroinflammatory processes, suggesting that modulating leptin sensitivity may influence inflammation in the hypothalamus. The observed downregulation indicates a complex interaction between leptin signaling and cellular stress responses, which may represent an adaptive mechanism to prolonged exposure to leptin or fatty acids. Understanding these dynamics is crucial for gaining insight into how neuroinflammation contributes to the development of leptin resistance and related metabolic disorders.

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Hypothalamic REV-ERBs Control Circadian Food Intake and Leptin Sensitivity [RNA-seq]

Project description:Obesity occurs when energy expenditure is outweighed by food intake. Tuberal hypothalamic nuclei, including the arcuate nucleus (ARC), ventromedial nucleus (VMH), and dorsomedial nucleus (DMH), regulate feeding amount as well as energy expenditure. Here we report that mice lacking circadian nuclear receptors REV-ERBa and b in the tuberal hypothalamus (HDKO) gain excessive weight on an obesogenic diet due both to decreased energy expenditure and increased food consumption during the light phase. Moreover, rebound food intake after fasting is markedly increased in HDKO mice. Integrative transcriptomic and cistromic analyses revealed that such disruption in feeding behavior is due to perturbed REV-ERB-dependent leptin signaling in the ARC. Indeed, in vivo leptin sensitivity is impaired in HDKO mice on an obesogenic diet in a circadian manner. Thus, REV-ERBs play a crucial role in hypothalamic regulation of food intake and circadian leptin sensitivity in diet-induced obesity.

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Project description:Purpose: 1. Bulk-RNA-Seq was performed to identify tancytye-enriched genes. 2. scRNA-Seq was performed to profile hypothalamic cells following leptin treatment Conclusions: Leptin receptor expression in tanycytes is either absent or undetectably low, that tanycytes do not directly regulate hypothalamic leptin signaling, and that leptin regulates gene expression in diverse hypothalamic cell types through both direct and indirect mechanisms.

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