Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Per2 regulation of mammary gland development and branching morphogenesis via cell fate determination

ABSTRACT: Circadian rhythms play key roles in daily physiological functions, development, and cancer. Period 2 (PER2) is a repressive element which inhibits transcription activated by positive clock elements resulting in diurnal cycling of genes. Here we show, that outside of time keeping, PER2 has a non-circadian function that is critical to mammary gland development. Virgin Per2 deficient mice, Per2ldc, have underdeveloped glands containing fewer bifurcations and terminal ducts. Using a transplantation model, we show that these changes are intrinsic to the gland and furthermore identify changes in cell fate commitment. Per2ldc mouse mammary glands have a luminal/basal bi-potent phenotype in cells of the ductal epithelium. We identified co-localization of E-cadherin and Keratin 14 in luminal cells and decreased p63 staining and gene expression in myoepithelial cells. Moreover, Per2ldc mice overexpress SLUG, which is related to mammary stem cell maintenance and EMT. Similar results were demonstrated using MCF10A and shPER2 MCF10A cell lines. Collectively this study reveals a critical non-circadian function of PER2 in mammary gland development, validates the Per2ldc model, and describes a potential role for PER2 in breast cancer.

ORGANISM(S): Mus musculus

PROVIDER: GSE109522 | GEO | 2018/01/24

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

GATA-3 maintains luminal cell differentiation in the mammary gland and in breast cancer

2006-10-24 | GSE5602 | GEO

Negative reciprocal regulation between SIRT1 and Per2 in circadian clock during aging (ChIP-Seq)

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

Negative reciprocal regulation between Sirt1 and Per2 modulates the circadian clock and aging (microarray expression)

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

GATA-3 maintains luminal cell differentiation in the mammary gland and in breast cancer

Project description:We have identified GATA-3 as a critical regulator of luminal cell differentiation in the mammary gland. Acute loss of GATA-3 in the adult mammary gland leads to an expansion of an undifferentiated luminal epithelium and the formation of a multi-layered epithelium. Here we report microarray analysis of mammary glands that have undergone acute loss of GATA-3 Adult GATA-3flox/flox; WAP-rtTA-Cre and GATA-flox/+; WAP-rtTA-Cre mice were administered doxyxcline for 5 days and their mammary glands harvested. Total RNA was extracted by the Trizol method. Het mammary gland total RNA was labeled with Cy5 while Null mammary gland total RNA was labeled with Cy3. Microarray hybridization was performed on spotted oligonucleotide microarrays with 38,000 features. Lowess print-tip normalization and analysis was performed on the Acuity software package (V 4.0)

2010-07-01 | E-GEOD-5602 | biostudies-arrayexpress

Negative reciprocal regulation between Sirt1 and Per2 modulates the circadian clock and aging (microarray expression)

2016-08-08 | E-GEOD-54436 | biostudies-arrayexpress

PER2 synchronizes mitotic expansion and decidual transformation of human endometrial stromal cells

Project description:Implantation is dependent on synchronized interactions between the conceptus and surrounding decidual cells but the involvement of clock genes in this process is not well understood. Circadian oscillations are predicated on transcriptional-translational feedback loops, which balance the activities of the transcriptional activators CLOCK and BMAL1 and repressors encoded by PER and CRY genes. Here we show that loss of PER2 expression silences circadian oscillations in decidualizing human endometrial stromal cells (HESCs). Downregulation was preceded by reduced CLOCK binding to a noncanonical E-box enhancer in the PER2 promoter and occurred between 12 - 24 h after exposure to a deciduogenic stimulus. RNA sequencing revealed that premature inhibition of PER2 by siRNA knockdown leads to a grossly disorganised decidual response. Gene ontology analysis highlighted a preponderance of cell cycle regulators amongst the 1,121 genes perturbed upon PER2 knockdown. Congruently, PER2 inhibition abrogated mitotic expansion of differentiating HESCs by inducing cell cycle block at G2/M. Analysis of mid-luteal endometrial biopsies revealed an inverse correlation between PER2 transcript levels and the number of miscarriages in women suffering reproductive failure. Thus, PER2 synchronizes mitotic expansion of HESCs with a periodic decidual gene expression; uncoupling of these events may cause persistent pregnancy failure. Endometrial mRNA profiles of paired control (siRNA-NT) and siRNA-PER2 were generated by deep sequencing, in triplicate using Illumina

2015-09-16 | E-GEOD-62854 | biostudies-arrayexpress

PER2 synchronizes mitotic expansion and decidual transformation of human endometrial stromal cells

2015-09-16 | GSE62854 | GEO

Nutrient Abundance Signals the Changing of the Seasons by Phosphorylating PER2

Project description:The circadian clock synchronizes metabolic and behavioral cycles with the rotation of the Earth by integrating environmental cues, such as light. Nutrient content also regulates the clock, though how and why this environmental signal affects the clock remains incompletely understood. Here, we elucidate a role for nutrient in regulating circadian alignment to seasonal photoperiods. High fat diet (HFD) promoted entrainment to a summer light cycle and inhibited entrainment to a winter light cycle by phosphorylating PER2 on serine 662. PER2-S662 phospho-mimetic mutant mice were incapable of entraining to a winter photoperiod, while PER2-S662 phospho-null mutant mice were incapable of entraining to a summer photoperiod, even in the presence of HFD. Multi-omic experimentation in conjunction with isocaloric hydrogenated-fat feeding, revealed a role for polyunsaturated fatty acids in nutrient-dependent seasonal entrainment. Altogether, we identify the mechanism whereby nutrient content shifts circadian rhythms to anticipate seasonal photoperiods in which that nutrient state predominates.

2024-01-29 | GSE254155 | GEO

Differential Gene Regulation during murine in vivo heart ischemia comparing wildtype and Per2 deficient mice

Project description:Disruption of peripheral circadian rhyme pathways dominantly leads to metabolic disorders. Studies on circadian rhythm proteins in the heart indicated a role for Clock or Per2 in cardiac metabolism. In fact, Per2-/- mice have larger infarct sizes with a deficient lactate production during myocardial ischemia. To test the hypothesis that cardiac Per2 represents an important regulator of cardiac metabolism during myocardial ischemia, we performed lactate measurements during reperfusion in Per1-/-, Per2-/- or wildtype mice followed by gene array studies using various ischemia-reperfusion protocols comparing wildtype and Per2-/- mice. Lactate measurements in whole blood confirmed a dominant role of Per2 for lactate production during myocardial ischemia. Surprisingly, high-throughput gene array analysis of eight different conditions on one 24-microarray plate revealed dominantly lipid metabolism as differentially regulated pathway in wildtype mice when compared to Per2-/-. In all treatment groups, the enzyme enoyl-CoA hydratase, which is essential in fatty acid beta-oxidation, was regulated in wildtype animals only. Studies using nuclear magnet resonance imaging (NMRI) confirmed altered fatty acid populations with higher mono-unsaturated fatty acid levels in hearts from Per2-/- mice. Unexpectedly, studies on gene regulation during reperfusion revealed solely pro inflammatory genes as differentially regulated 'Per2-genes'. Subsequent studies on inflammatory markers showed increasing IL6 or TNFa levels during reperfusion in Per2-/- mice. In summary, these studies reveal a novel role of cardiac Per2 for fatty acid metabolism or inflammation during myocardial ischemia and reperfusion.

2013-08-21 | GSE45818 | GEO

Expression data from white and brown adipose tissue (WAT and BAT) of per2-/- and control mice

Project description:We found that the circadian protein PER2 interacts with the nuclear receptor PPARgamma to repress its activity. PPARgamma is a master regulator of adipogenesis and lipid metabolism and is very abundant in adipose tissue. We used microarrays to detail the global program of gene expression in adipose tissue lacking the per2 gene. This analysis identified several PPARgamma target genes up-regulated in adipose tissue from per2-/- mice.

2010-10-19 | GSE20165 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data