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Deciphering responses of the fetal suprachiasmatic nuclei to the rhythmic maternal signals using omics approach

ABSTRACT: Deciphering responses of the fetal suprachiasmatic nuclei to the rhythmic maternal signals using omics approach

PROVIDER: PRJNA759558 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15686172.fastq.gz	Fastqsanger.gz
	SRR15686173.fastq.gz	Fastqsanger.gz
	SRR15686174.fastq.gz	Fastqsanger.gz
	SRR15686175.fastq.gz	Fastqsanger.gz
	SRR15686176.fastq.gz	Fastqsanger.gz

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Deciphering responses of the fetal suprachiasmatic nuclei to the rhythmic maternal signals using omics approach

Project description:We report circadian (time series, circadian time 0, 3, 6, 9, 12, 18, 21h) transcriptomic analysis of mouse fetal (embryonic day 17) suprachiasmatic nuclei (SCN) from either sham operarated ad libitum fed mothers (group A) or from SCN-lesioned mothers on resctricted feeding regime. The analysis revealed low amplitude rhythms in the fetal SCN driven by maternal SCN and/or maternal feeding behavior.

2022-04-01 | GSE183172 | GEO

RNA-seq of neuronal SOX2-ablated murine suprachiasmatic nuclei against wild-type littermate controls

Project description:Mice lacking the stem/progenitor cell transcription factor, Sex determining region Y-box 2 (SOX2), in neurons of the suprachiasmatic nuclei display imprecise, poorly consolidated behavioral rhythms that do not entrain efficiently to environmental light cycles. RNA sequencing revealed that Sox2 deficiency alters the circadian transcriptome of the SCN, reducing the expression of many core clock genes and neuropeptide-receptor systems.

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Astrocytes in the mouse suprachiasmatic nuclei respond directly to glucocorticoids feedback

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Circadian VIPergic neurons of the suprachiasmatic nuclei sculpt the sleep-wake cycle

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Circadian analysis of the mouse cerebellum

Project description:The cerebellum contains a circadian clock, generating internal temporal signals. The daily oscillations of cerebellar proteins were investigated here in mice using large-scale two-dimensional differences in gel electrophoresis (2D-DIGE). Analysis of 2D-DIGE gels highlighted the rhythmic variation in the intensity of 27/588 protein spots (5%) over 24-h based on cosinor regression. Notably, rhythmic expression of most abundant cerebellar proteins was clustered in two main phases (i.e., midday and midnight), leading to bimodal distribution. Only 6 proteins identified here to be rhythmic in the cerebellum are also known to oscillate in the suprachiasmatic nuclei, including 2 proteins involved in synapse activity (Synapsin 2 (Syn2) and vesicle-fusing ATPase (Nsf)), 2 others participating in carbohydrate metabolism (triosephosphate isomerase (Tpi1) and alpha-enolase (Eno1)), and Glutamine synthetase (Glul), as well as Tubulin alpha (Tuba4a). Most oscillating cerebellar proteins were not previously identified in circadian proteomic analyses of any tissue. Strikingly, daily accumulation of mitochondrial proteins was clustered to the mid-resting phase, as previously observed for distinct mitochondrial proteins in the liver. This study highlights extensive rhythmic aspects of the cerebellar proteome.

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Circadian VIPergic neurons of the suprachiasmatic nuclei sculpt the sleep-wake cycle

Project description:Although the mammalian rest-activity cycle is controlled by a "master clock" in the suprachiasmatic nuclei (SCN) of the hypothalamus, it is unclear how firing of individual SCN neurons gates individual features of daily activity. Here, we demonstrate that a specific transcriptomically identified population of mouse VIP+ SCN neurons is active at the "wrong" time of the day -nighttime- when most SCN neurons are silent. Using chemogenetic and optogenetic strategies, we show that these neurons and their cellular clocks are necessary and sufficient to gate and time nighttime sleep, but have no effect upon daytime sleep. We propose mouse nighttime sleep, analogous to the human siesta, is a "hard-wired" property gated by specific neurons of the master clock to favor subsequent alertness prior to dawn (a circadian "wake maintenance zone"). Thus, the SCN is not simply a 24h metronome: specific populations sculpt critical features of the sleep-wake cycle.

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