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GSE45155
Mus musculus
8 Downloadable Samples
Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
The Hippo pathway plays a crucial in organ size control during development and tissue homeostasis in adult life. To examine a role for Hippo signaling in the intestinal epithelium, we analyzed gene expression patterns in the mouse intestinal epithelilum transfected with siRNAs or expression plasmids for shRNAs targeting the Hippo pathway effectors, YAP and TAZ.
Publication Title
Dual role of YAP and TAZ in renewal of the intestinal epithelium.
Sample Metadata Fields
Sex, Age, Specimen part, Treatment
View Samples- Mus musculus
- 19 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The ERK family of MAP kinase plays a critical role in growth factor-stimulated cell cycle progression from G0/G1 to S phase. But, how sustained activation of ERK promotes G1 progression has remained unclear. Here, our systematic analysis on the temporal program of ERK-dependent gene expression shows that sustained activation of ERK is required for induction and maintenance of the decreased expression levels of a set of genes. Moreover, our cell biological analysis reveals that these ERK-dependent downregulated genes have the ability to block S phase entry. Cessation of ERK activation at mid or late G1 leads to a rapid increase of these anti-proliferative genes and results in the inhibition of S phase entry. These findings uncover an important mechanism by which the duration of ERK activation regulates cell cycle progression through dynamic changes in gene expression, and identify novel ERK target genes crucial for the regulation of cell cycle progression.
Publication Title
Continuous ERK activation downregulates antiproliferative genes throughout G1 phase to allow cell-cycle progression.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 10 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
In skeletal muscle differentiation, muscle-specific genes are regulated by two groups of transcription factors, the MyoD and MEF2 families, which work together to drive the differentiation process. Here we show that ERK5 regulates muscle cell fusion through Klf transcription factors. The inhibition of ERK5 activity suppresses muscle cell fusion with minimal effects on the expression of MyoD, MEF2, and their target genes. Promoter analysis coupled to microarray assay reveals that Klf-binding motifs are highly enriched in the promoter regions of ERK5-dependent upregulated genes. Remarkably, Klf2 and Klf4 expression are also upregulated during differentiation in an ERK5-dependent manner, and knockdown of Klf2 or Klf4 specifically suppresses muscle cell fusion. Moreover, we show that the Sp1 transcription factor links ERK5 to Klf2/4, and that nephronectin, a Klf transcriptional target, is involved in muscle cell fusion. Therefore, an ERK5/Sp1/Klf module plays a key role in the fusion process during skeletal muscle differentiation.
Publication Title
ERK5 regulates muscle cell fusion through Klf transcription factors.
Sample Metadata Fields
Cell line, Time
View Samples- Mus musculus
- 31 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
It remains unclear how the ectopic expression of defined transcription factors induces dynamic changes in gene expression profiles that establish a pluripotent state during direct cell reprogramming. In the present study, we first identified a temporal gene expression program during the reprogramming process. Promoter analyses then predicted the role of two forkhead box transcription factors, Foxd1 and Foxo1, as mediators of the gene expression program. Knockdown of Foxd1 or Foxo1 reduced the number of induced pluripotent stem cells (iPSCs). The knockout of Foxd1 prevented the downstream transcription program, including the expression of reprogramming marker genes. Interestingly, the expression level of Foxd1 was also transiently increased in a small population of cells in the middle stage of reprogramming. The presence or absence of Foxd1 expression in this stage was correlated with a future cell fate as iPSCs or non-reprogrammed cells. These results suggest that Foxd1 is a mediator and indicator of the successful progression of the gene expression program in cell reprogramming.
Publication Title
Foxd1 is a mediator and indicator of the cell reprogramming process.
Sample Metadata Fields
Specimen part, Time
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
It remains unclear how the ectopic expression of defined transcription factors induces dynamic changes in gene expression profiles that establish a pluripotent state during direct cell reprogramming. In the present study, we first identified a temporal gene expression program during the reprogramming process. Promoter analyses then predicted the role of two forkhead box transcription factors, Foxd1 and Foxo1, as mediators of the gene expression program. Knockdown of Foxd1 or Foxo1 reduced the number of induced pluripotent stem cells (iPSCs). The knockout of Foxd1 prevented the downstream transcription program, including the expression of reprogramming marker genes. Interestingly, the expression level of Foxd1 was also transiently increased in a small population of cells in the middle stage of reprogramming. The presence or absence of Foxd1 expression in this stage was correlated with a future cell fate as iPSCs or non-reprogrammed cells. These results suggest that Foxd1 is a mediator and indicator of the successful progression of the gene expression program in cell reprogramming.
Publication Title
Foxd1 is a mediator and indicator of the cell reprogramming process.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 46 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Spermatogonial stem cells (SSCs) have pluripotent potential. However, frequency of pluripotent cell derivation is low and the mechanism of culture-induced reprogramming remains unknown. Here we report that epigenetic instability of germline stem (GS) cells, cultured SSCs, induces pluripotent cell derivation. GS cells undergo DNA demethylation in H19 differentially methylated region under low-density culture. When H19 demethylation was induced by Dnmt1 depletion, they converted into embryonic stem (ES)-like cells. Dnmt1 depletion downregulated Dmrt1 expression, whose depletion also induced pluripotency. Functional screening of Dmrt1 target gene revealed that Dmrt1 depletion upregulates Sox2, the key molecule responsible for generating induced pluripotent stem cells. Although Sox2 transfection upregulated Oct4 and produced pluripotent cells, this conversion was inhibited by Oct1 overexpression, suggesting that the balance of Oct proteins maintains SSC identity. These results suggest that culture-induced reprogramming is caused by unstable DNA methylation, and that Dmrt1-Sox2 cascade is critical for regulating pluripotency in SSCs.
Publication Title
Regulation of pluripotency in male germline stem cells by Dmrt1.
Sample Metadata Fields
Specimen part, Treatment
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- Homo sapiens
- 24 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Analyzed differentially expressed genes among FOP- or resFOP-iMSCs treated by several ligands:
Publication Title
Neofunction of ACVR1 in fibrodysplasia ossificans progressiva.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 9 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Nuclear export of mRNA is an essential process for eukaryotic gene expression. TREX complex couples the gene expression from transcription and splicing to mRNA export. Sub2, a core component of TREX complex in yeast is diversified to two closely related RNA helicases, UAP56 and URH49 in human.UAP56 and URH49 are required for bulk poly (A)+ RNA export but their target genes are quite different. In conclusion, UAP56 and URH49 have a different function in vivo despite the highly similarity.
Publication Title
The closely related RNA helicases, UAP56 and URH49, preferentially form distinct mRNA export machineries and coordinately regulate mitotic progression.
Sample Metadata Fields
Cell line
View Samples