Mus musculus
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: GSE54451
PROVIDER: PRJNA236564 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1146021.fastq.gz | Fastqsanger.gz | |||
| SRR1146022.fastq.gz | Fastqsanger.gz | |||
| SRR1146023.fastq.gz | Fastqsanger.gz | |||
| SRR1146024.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 4 of 4 |
Similar Datasets
Project description:Sirtuin 1 (SIRT1) is involved in both aging and circadian-clock regulation, yet the link between the two processes in relation to SIRT1 function is not clear. Using Sirt1-deficient mice, we found that Sirt1 and Period 2 (Per2) constitute a reciprocal negative regulation loop that plays important roles in modulating hepatic circadian rhythmicity and aging. Sirt1-deficient mice exhibited profound premature aging and enhanced acetylation of histone H4 on lysine16 (H4K16) in the promoter of Per2, the latter of which leads to its overexpression; in turn, Per2 suppresses Sirt1 transcription through binding to the Sirt1 promoter at the Clock/Bmal1 site. This negative reciprocal relationship between SIRT1 and PER2 was also observed in human hepatocytes. We further demonstrated that the absence of Sirt1 or the ectopic overexpression of Per2 in the liver resulted in a dysregulated pace of the circadian rhythm. The similar circadian rhythm was also observed in aged wild type mice. The interplay between Sirt1 and Per2 modulates aging gene expression and circadian-clock maintenance. To investigate hepatic SIRT1-dependent aging related genes, livers from wild type mice at 3 months (young), 12 months (middle age), and 19 months (old) of age, as well as Sirt1-deficient mice at 3 months of age were snap frozen and subject to RNA isolation and microarray analysis.
2016-08-08 | E-GEOD-54436 | biostudies-arrayexpress
Project description:Sirtuin 1 (SIRT1) is involved in both aging and circadian-clock regulation, yet the link between the two processes in relation to SIRT1 function is not clear. Using Sirt1-deficient mice, we found that Sirt1 and Period 2 (Per2) constitute a reciprocal negative regulation loop that plays important roles in modulating hepatic circadian rhythmicity and aging. Sirt1-deficient mice exhibited profound premature aging and enhanced acetylation of histone H4 on lysine16 (H4K16) in the promoter of Per2, the latter of which leads to its overexpression; in turn, Per2 suppresses Sirt1 transcription through binding to the Sirt1 promoter at the Clock/Bmal1 site. This negative reciprocal relationship between SIRT1 and PER2 was also observed in human hepatocytes. We further demonstrated that the absence of Sirt1 or the ectopic overexpression of Per2 in the liver resulted in a dysregulated pace of the circadian rhythm. The similar circadian rhythm was also observed in aged wild type mice. The interplay between Sirt1 and Per2 modulates aging gene expression and circadian-clock maintenance.
2016-08-08 | GSE54436 | GEO
Project description:SIRT1 is involved in both aging and circadian clock regulation, yet the link between the two processes in relation to SIRT1 function is unclear. Analyzing SIRT1-deficient cells and mice, we demonstrated that SIRT1 and Per2 constitute a reciprocal negative regulation loop that plays important roles in modulating circadian rhythmicity, metabolism and aging. SIRT1-deficient mice exhibit profound premature aging and enhanced H4K16 acetylation in the promoter of Per2 leading to its overexpression; in turn, Per2 suppresses SIRT1 transcription through binding to SIRT1 promoter at the CLOCK/BMAL1 site. We further demonstrated that absence of SIRT1 or ectopic overexpression of Per2 in the liver resulted in an accelerated pace of circadian rhythm and dysregulated amplitude, mimicking the natural process of circadian shortening in aged mice. Thus the interplay between SIRT1 and Per2 provides a link between the life-long sequence of aging and circadian clock maintenance.
2016-08-08 | GSE54449 | GEO
Project description:Negative reciprocal regulation between SIRT1 and Per2 in circadian clock during aging
| PRJNA236544 | ENA
Project description:Negative reciprocal regulation between Sirt1 and Per2 modulates the circadian clock and aging (microarray expression)
| PRJNA236492 | ENA
Project description:Circadian rhythms are a series of endogenous autonomous 24-hour oscillations generated by the circadian clock. At the molecular level, the circadian clock is generated by a transcription-translation feedback loop, where BMAL1 and CLOCK transcription factors of the positive arm activate the expression of CRYPTOCHROME and PERIOD (PER) genes of the negative arm as well as the circadian clock-regulated genes. In this project, we aimed at finding the interactome of PER2 protein in human U2OS osteosarcoma cell line using proximity-dependent biotin identification (BioID) technique. U2OS clones overexpressing PER2-BioID2 or BioID2 were treated with dexamethasone in order to reset the circadian rhythm, and cells were then incubated in biotin-containing media for 12 hours to label the proteins in close proximity of PER2-BioID2. Samples were collected after 36 and 48 hours of the resetting to identify the labeled proteins by mass spectrometry. In addition to known interactors such as CRY1 and CRY2, many novel interactors were identified. In summary, we obtained a network of PER2 interactome and confirmed some of the novel interactions using classical the co-immunoprecipitation method.
2022-04-22 | PXD025179 | Pride
Project description:The peripheral circadian oscillator plays an essential role in synchronizing local physiology to operate in a circadian manner via regulation of the expression of clock-controlled genes. In the murine uterus, the endometrial stromal cells undergo proliferation and differentiation into decidual cells in response to ovarian steroids and blastocyst implantation at the early stage of pregnancy. The circadian clock genes are attenuated in the decidualizing cells only 2 days after implantation. The present study aimed to evaluate the circadian rhythms of clock genes and clock-controlled genes expressed in the rat uterus endometrial stromal cells (UESCs) during the stage of implantation. The real-time monitoring system of Per2 promoter activity was employed to precisely evaluate the generation of circadian rhythms in the UESCs prepared from transgenic rats constructed with mouse Per2 promoter-destabilized luciferase reporter gene (Per2-dLuc). During monitoring Per2-dLuc oscillation after synchronization with dexamethasone, total RNA was isolated from the cultured UESCs at four-time points (6-h interval) in the first to second phases and cDNA was synthesized. cRNA was synthesized from the double strand cDNA and hybridized on a DNA microarray. RT-qPCR was performed to confirm the expression of core clock genes revealed by DNA microarray analysis. Several clock genes such as Bmal1, Rev-erbα, and Per2 displayed significant rhythms. Of 12,252 genes showing significantly expression, 7,235 genes displayed significant alterations (p < 0.05). These genes were related to growth factors, transcription factors, receptors, channels, and enzymes. Some candidates as clock-controlled genes were evaluated by using RNA interference to Bmal1 mRNA. Down-regulation of Igf1 gene expression was observed by Bmal1 silencing, whereas the expression of Inhβa, Fas, and Caspase3 were significantly increased. These results indicate that clock-controlled genes are up- or down-regulated in rat UESCs during the stage of decidualization. DNA microarray analysis coupled with RNA interference will be helpful to understand the physiological roles of some oscillating genes in blastocyst implantation and placenta formation. The circadian clock positively or negatively regulates the expression of clock-controlled genes, including growth factors and apoptosis-related factors. To search the clock-controlled genes expressed during the period of implantation, we analyzed the clock genes and clock-controlled genes expressed in cultured uterus endometrial stromal cells prepared from pregnant rats at the stage of implantation using DNA microarray technology. We used transgenic rats constructed with mouse Per2 promoter-destabilized luciferase (Per2-dLuc) reporter gene to precisely adjust the time of gene expression. In addition, several genes of significantly expressed genes including growth factor genes and apoptosis-related genes were analyzed using RNA interference to Bmal1 mRNA whether these were controlled under circadian clockwork.
2013-07-23 | E-GEOD-49080 | biostudies-arrayexpress
Project description:The circadian clock maintains synchrony between biological processes and light/dark cycles by integrating environmental cues. How the clock adapts to seasonal variations in the environment is incompletely understood. We found that a high-fat diet increased phosphorylation of the clock protein PERIOD2 (PER2) on serine 662 (S662), which was necessary and sufficient for regulating phase shifting of daily locomotor activity to entrain to seasonal light cycles. PER2-S662 phosphorylation correlated with genome-wide expression pathways that regulate polyunsaturated fatty acid (PUFA) conversion into oxylipins in the hypothalamus. Partial hydrogenation of dietary PUFAs increased hypothalamic PER2-S662 phosphorylation and entrainment to a summer photoperiod in control mice, but not in mice for which PER2-S662 could not be phosphorylated. PER2-S662 phosphorylation is influenced by, and alters the regulation of, unsaturated fat to control circadian phase shifting across the seasons.
2024-01-29 | GSE254155 | GEO
Project description:Circadian rhythms, governed by the dominant central as well as various peripheral clocks, regulate almost all biological processes, including sleep-wake cycles, hormone secretion, and metabolism. In certain contexts, regulation and function of the peripheral oscillations can be decoupled from the central clock. However, the specific mechanisms underlying muscle-intrinsic clock-dependent modulation of muscle function and metabolism remain unclear. We investigated the outcome of perturbations of the primary and secondary feedback loops of the molecular clock in skeletal muscle by specific gene ablation of Period 2 (Per2) and RAR-related orphan receptor alpha (RORα), respectively. In both models, a dampening of core clock gene oscillation was observed, while the phase was preserved. Moreover, both loops seem involved in the homeostasis of amine groups. Very divergent outcomes were seen for overall muscle gene expression, primarily affecting circadian rhythmicity in the Per2, and non-oscillating genes in the RORα knockouts, leading to distinct outcomes in terms of metabolome and phenotype. These results highlight the entanglement of the molecular clock and muscle plasticity, and allude to specific functions of different clock components, i.e. the primary and secondary feedback loops, in this context. The reciprocal interaction between muscle contractility and circadian clocks might therefore be instrumental to determine a finely tuned adaptation of muscle tissue to perturbations in health and disease.
2024-01-02 | GSE243522 | GEO
Project description:We show that the cyclin-dependent kinase 5 (CDK5) regulates the mammalian circadian clock via phosphorylation of PER2. CDK5 phosphorylated PER2 at serine residue 394 (S394) as shown by an in vitro kinase assay.
2019-12-04 | PXD012068 | Pride