Filters
Technology
Platform
Mus musculus
31 Downloadable Samples
Description
Loss and heterozygosity for NDR1 predisposes mice to T-cell lymphoma development. To analyze mechanisms of tumor development in these mice chemically (ENU)-induced tumors were collected and RNA was extracted.
Publication Title
Ablation of the kinase NDR1 predisposes mice to the development of T cell lymphoma.
Sample Metadata Fields
Sex, Specimen part, Disease, Treatment
View Samples- Mus musculus
- 5 Downloadable Samples
Description
We have analyzed the transcript expression levels in Dicer knock-out embryonic stem (ES) cells 24 hours after transfection with either control siRNA agains Renilla luciferase or miRNA Mimics (Dharmacon) of mmu-miR-290 cluster members in order to identify primary targets of miR-290 cluster miRNAs.
Publication Title
MicroRNAs control de novo DNA methylation through regulation of transcriptional repressors in mouse embryonic stem cells.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 13 Downloadable Samples
Description
OBF1, also known as Bob.1 or OCA-B, is a B lymphocyte-specific transcription factor which coactivates Oct1 and Oct2 on B cell specific promoters. So far, the function of OBF1 has been mainly identified in late stage B cell populations. The central defect of OBF1 deficient mice is a severely reduced immune response to T cell-dependent antigens and a lack of germinal center formation in the spleen. Relatively little is known about a potential function of OBF1 in developing B cells. Here we have generated transgenic mice overexpressing OBF1 in B cells under the control of the immunoglobulin heavy chain promoter and enhancer. Surprisingly, these mice have greatly reduced numbers of follicular B cells in the periphery and have a compromised immune response. Furthermore, B cell differentiation is impaired at an early stage in the bone marrow. A first block is observed during B cell commitment and a second differentiation block is seen at the large preB2 cell stage. The cells that succeed to escape the block and to differentiate into mature B cells have post-translationally downregulated the expression of transgene, indicating that expression of OBF1 beyond the normal level early in B cell development is deleterious. Indeed ID3, which is a negative regulator of B cell differentiation, is upregulated in the EPLM and preB cells of the transgenic mice. Furthermore ID3 promoter contains an octamer site suggesting that it is a potential OBF-1 direct target gene. These results provide evidence that OBF1 expression has to be tightly regulated in early B cells to allow efficient B lymphocyte differentiation.
Publication Title
No associated publication
Sample Metadata Fields
No sample metadata fields
View Samples- Gallus gallus, Mus musculus
- 4 Downloadable Samples
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
The transcription factor prospero homeobox protein 1 is a direct target of SoxC proteins during developmental vertebrate neurogenesis.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 4 Downloadable Samples
Description
The HMG-domain containing SoxC transcription factors Sox4 and Sox11 are expressed in the vertebrate central nervous system in neuronal precursors and neuroblasts. They are required during early stages of neurogenesis.
Publication Title
The transcription factor prospero homeobox protein 1 is a direct target of SoxC proteins during developmental vertebrate neurogenesis.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 4 Downloadable Samples
Description
STAT3 is a pleiotropic transcription factor with important functions in cytokine signalling in a variety of tissues. However, the role of STAT3 in the intestinal epithelium is not well understood. Here we demonstrate that development of colonic inflammation is associated with the induction of STAT3 activity in intestinal epithelial cells (IEC). Studies in genetically engineered mice showed that epithelial STAT3 activation in DSS colitis is dependent on IL-22 rather than IL-6. IL-22 was secreted by colonic CD11c+ cells in response to Toll-like receptor stimulation. Conditional knockout mice with an IEC specific deletion of STAT3 activity were highly susceptible to experimental colitis, indicating that epithelial STAT3 regulates gut homeostasis. STAT3IEC-KO mice, upon induction of colitis, showed a striking defect of epithelial restitution. Gene chip analysis indicated that STAT3 regulates the cellular stress response, apoptosis and pathways associated with wound healing in IEC. Consistently, both IL-22 and epithelial STAT3 were found to be important in wound-healing experiments in vivo. In summary, our data suggest that intestinal epithelial STAT3 activation regulates immune homeostasis in the gut by promoting IL-22-dependent mucosal wound healing.
Publication Title
STAT3 links IL-22 signaling in intestinal epithelial cells to mucosal wound healing.
Sample Metadata Fields
Specimen part
View Samples
GSE13765- Mus musculus
- 24 Downloadable Samples
Description
There is growing recognition that mammalian cells produce many thousands of large intergenic transcripts. However, the functional significance of these transcripts has been particularly controversial. While there are some well-characterized examples, the vast majority (>95%) show little evidence of evolutionary conservation and have been suggested to represent transcriptional noise. Here, we report a new approach to identifying large non-coding RNAs (ncRNAs) by using chromatin-state maps to discover discrete transcriptional units intervening known protein-coding loci. Our approach identified ~1600 large multi-exonic RNAs across four mouse cell types. In sharp contrast to previous collections, these large intervening ncRNAs (lincRNAs) exhibit strong purifying selection in their genomic loci, exonic sequences, and promoter regions with greater than 95% showing clear evolutionary conservation. We also developed a novel functional genomics approach that assigns putative functions to each lincRNA, revealing a diverse range of roles for lincRNAs in processes from ES pluripotency to cell proliferation. We obtained independent functional validation for the predictions for over 100 lincRNAs, using cell-based assays. In particular, we demonstrate that specific lincRNAs are transcriptionally regulated by key transcription factors in these processes such as p53, NFKB, Sox2, Oc4, and Nanog. Together, these results define a unique collection of functional lincRNAs that are highly conserved and implicated in diverse biological processes.
Publication Title
No associated publication
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 32 Downloadable Samples
Description
Expression profiles generated during dissection of the molecular mechanisms underlying direct reprogramming of somatic cells to a pluripotent state (induced pluripotent stem cells, iPS).
Publication Title
Dissecting direct reprogramming through integrative genomic analysis.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus, Homo sapiens
- 20 Downloadable Samples
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
The impact of microRNAs on protein output.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 16 Downloadable Samples
Description
Adipose tissue plays an important role in storing excess nutrients and preventing ectopic lipid accumulation in other organs. Obesity leads to excess lipid storage in adipocytes, resulting in the generation of stress signals and the derangement of metabolic functions. SIRT1 is an important regulatory sensor of nutrient availability in many metabolic tissues. Here we report that SIRT1 functions in adipose tissue to protect from the development of inflammation and obesity under normal feeding conditions, and the progression to metabolic dysfunction under dietary stress. Genetic ablation of SIRT1 from adipose tissue leads to gene expression changes that highly overlap with changes induced by high fat diet in wild type mice, suggesting that dietary stress signals inhibit the activity of SIRT1. Indeed, we show that high fat diet induces the cleavage of SIRT1 in adipose tissue by the inflammation-activated caspase-1, providing a link between dietary stress and predisposition to metabolic dysfunction.
Publication Title
High-fat diet triggers inflammation-induced cleavage of SIRT1 in adipose tissue to promote metabolic dysfunction.
Sample Metadata Fields
No sample metadata fields
View Samples