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GSE134613
Mus musculus
9 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Stromal cells rapidly reorganize cell composition during would healing. Resident stromal cells secrete systemic ligands and mobilize immune cells from bone marrow. Subsequently resident cells and mobilized immune cells cooperate together for efficient wound healing.
Publication Title
Surgical Injury and Ischemia Prime the Adipose Stromal Vascular Fraction and Increase Angiogenic Capacity in a Mouse Limb Ischemia Model.
Sample Metadata Fields
Age, Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Ascorbic acid (AA) is a powerful antioxidant and play as a cofactor for various enzymes in vivo. In this study, we investigated the effect of AA depletion on gene expression in the liver and lipid metabolism by using SMP30/GNL knockout (KO) mice which are unable to biosynthesis AA. First, we performed microarray analysis. Briefly, SMP30/GNL KO mice were weaned and divided into two groups; AA-depleted and supplemented groups, which mice were free access to water containing 1.5 g/L AA. After 4 weeks, mRNA was isolated and purified from the liver. In this study, Affymetrix GeneChip was used for microarray analysis. Actually, AA-depletion altered many gene expressions related to lipid metabolism. Especially, Cytochrome P450 7a1 (Cyp7a1), a late-limiting enzyme of bile acid biosynthesis, gene expression was significantly up-regulated. We also confirmed Cyp7a1 protein levels by Western blotting. Next, we investigated the influence of AA depletion on lipid metabolism. We examined the lipid and bile acid levels in the liver, plasma, and gallbladder from SMP30/GNL KO mice. Amount of total bile acid (TBA), free fatty acid (FA), total cholesterol (TC), triglyceride (TG), and phospholipids (PL) were measured by colorimetric method. AA depletion reduced TBA levels in the liver and gallbladder. However, FA, TC, TG, and PL in the plasma and liver were not changed by AA depletion. Although Cyp7a1 gene expression and protein levels were increased by AA depletion, amount of bile acid were reduced. Conclusively, we have shown that AA depletion reduced bile acid biosynthesis and elevated Cyp7a1 gene expression and protein levels. Thus, AA is an essential for bile acid biosynthesis pathway.
Publication Title
Ascorbic acid deficiency affects genes for oxidation-reduction and lipid metabolism in livers from SMP30/GNL knockout mice.
Sample Metadata Fields
Sex, Specimen part
View Samples- Caenorhabditis elegans
- 46 Downloadable Samples
- Affymetrix C. elegans Genome Array (celegans)
Description
Dietary restriction extends lifespan and delays the age-related physiological decline in many species. Intermittent fasting (IF) is one of the most effective dietary restriction regimens that extends lifespan in C. elegans and mammals1,2. In C. elegans, the FOXO transcription factor DAF-16 is implicated in fasting-induced gene expression changes and the longevity response to IF3; however, the mechanisms that sense and transduce fasting-stress stimuli have remained largely unknown. Here we show that a KGB-1/AP1 (activator protein 1) module is a key signalling pathway that mediates fasting-induced transcriptional changes and IF-induced longevity. Our promoter analysis coupled to genome-wide microarray results has shown that the AP-1-binding site, together with the FOXO-binding site, is highly over-represented in the promoter regions of fasting-induced genes. We find that JUN-1 (C. elegans c-Jun) and FOS-1 (C. elegans c-Fos), which constitute the AP-1 transcription factor complex, are required for IF-induced longevity. We also find that KGB-1 acts as a direct activator of JUN-1 and FOS-1, is activated in response to fasting, and, among the three C. elegans JNKs, is specifically required for IF-induced longevity. Our results demonstrate that most fasting-induced upregulated genes, including almost all of the DAF-16-dependent genes, require KGB-1 and JUN-1 function for their induction, and that the loss of kgb-1 suppresses the fasting-induced upregulation of DAF-16 target genes without affecting fasting-induced DAF-16 nuclear translocation. These findings identify the evolutionarily conserved JNK/AP-1 module as a key mediator of fasting-stress responses, and suggest a model in which two fasting-induced signalling pathways leading to DAF-16 nuclear translocation and KGB-1/AP-1 activation, respectively, integrate in the nucleus to coordinately mediate fasting-induced transcriptional changes and IF-induced longevity.
Publication Title
A fasting-responsive signaling pathway that extends life span in C. elegans.
Sample Metadata Fields
Treatment
View Samples- Caenorhabditis elegans
- 10 Downloadable Samples
- Affymetrix C. elegans Genome Array (celegans)
Description
Intermittent fasting is one of the most effective dietary restriction regimens that extend life-span in C. elegans and mammals. Fasting-stimulus responses are key to the longevity response; however, the mechanisms that sense and transduce fasting-stimulus have remained largely unknown. Through a comprehensive transcriptome analysis in C. elegans, we have found that along with the FOXO transcription factor DAF-16, AP-1 (JUN-1/FOS-1) plays a central role in fasting-induced transcriptional changes. KGB-1, one of the C. elegans JNKs, acted as an activator of AP-1, and was activated in response to fasting. KGB-1 and AP-1 were involved in intermittent fasting-induced longevity. Fasting-induced upregulation of the components of the SCF E3 ubiquitin ligase complex via AP-1 and DAF-16 enhanced protein ubiquitination, and reduced protein carbonylation. Our results have thus identified a fasting-responsive KGB-1/AP-1 signaling pathway, which, together with DAF-16, causes transcriptional changes that mediate longevity partly through regulating proteostasis.
Publication Title
A fasting-responsive signaling pathway that extends life span in C. elegans.
Sample Metadata Fields
Treatment
View Samples- Mus musculus
- 9 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The non-coding Xist RNA triggers silencing of one of the two female X chromosomes during X inactivation in mammals. Gene silencing by Xist is restricted to special developmental contexts found in cells of the early embryo and specific hematopoietic precursors. The absence of critical silencing factors might explain why Xist cannot silence outside these contexts. Here, we show that Xist can also initiate silencing in a lymphoma model. Using the tumor context we identify the special AT rich binding protein SATB1 as an essential silencing factor. We show that loss of SATB1 in tumor cells abrogates the silencing function of Xist. In normal female lymphocytes Xist localizes along SATB1 filaments and, importantly, forced Xist expression can relocalize SATB1 into the Xist cluster. This reciprocal influence on localization suggests a molecular interaction between Xist and SATB1. SATB1 and its close homologue SATB2 are expressed during the initiation window for X inactivation in embryonic stem cells and are recruited to surround the Xist cluster. Furthermore, ectopic expression SATB1 or SATB2 enables gene silencing by Xist in embryonic fibroblasts, which normally do not provide an initiation context. Thus, SATB1 functions as a crucial initiation factor and may act to organize genes for silencing by Xist during the initiation of X inactivation.
Publication Title
SATB1 defines the developmental context for gene silencing by Xist in lymphoma and embryonic cells.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 24 Downloadable Samples
- Illumina Mouse Ref-6 V1
Description
Microarray expression arrays on mesothelium and other tissues dissected from mice were used to identify candidate mesothelial lineage markers. These were then tested by qRTPCR across a panel of human mesothelioma cells lines, other cancers, and normal primary cells includidng mesothelial cells.
Publication Title
LRRN4 and UPK3B are markers of primary mesothelial cells.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 10 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
To examine whether energy starvation caused by the increase in rRNA transcription affects liver metabolism, we compared the gene expression profiles of WT and NML-KO livers using Affymetrix microarray technology.
Publication Title
Hepatic rRNA transcription regulates high-fat-diet-induced obesity.
Sample Metadata Fields
Age, Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
During pregnancy, pancreatic islets undergo structural and functional changes that lead to enhance insulin release in response to increased insulin demand, which is rapidly reversed at parturition. One of the most important changes is expansion of pancreatic -cell mass mainly by increased proliferation of cells.
Publication Title
Serotonin regulates pancreatic beta cell mass during pregnancy.
Sample Metadata Fields
Specimen part, Time
View Samples- Mus musculus
- 4 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Neural precursor cells (NPCs) in the mammalian neocortex generate various neuronal and glial cell types in a developmental stage-dependent manner. Most neocortical NPCs lose their neurogenic potential after birth. We have previously shown that high mobility group A (HMGA) proteins confer the neurogenic potential on early-stage NPCs during the midgestation period, although the underlying mechanisms are not fully understood. Here we performed microarray analysis and compared expression profiles between control and HMGA2-overexpressed NPCs.
Publication Title
IMP2 regulates differentiation potentials of mouse neocortical neural precursor cells.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Mutations of the transcriptional regulator Mecp2 cause the X-linked autism spectrum disorder Rett syndrome (RTT), and Mecp2 has been implicated in several other neurodevelopmental disorders. To identify potential target genes regulated directly or indirectly by MeCP2, we performed comparative gene expression analysis via oligonucleotide microarrays on Mecp2-/y (Mecp2-null) and wild-type CPN purified via fluorescence-activated cell sorting (FACS).
Publication Title
Reduction of aberrant NF-κB signalling ameliorates Rett syndrome phenotypes in Mecp2-null mice.
Sample Metadata Fields
Specimen part
View Samples