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GSE22772
Homo sapiens
9 Downloadable Samples
Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Glioblastoma multiforme (GBM) is the most malignant and most common tumor of the central nervous system characterized by rapid growth and extensive tissue infiltration. GBM results in more years of life lost than any other cancer type. Notch signaling has been implicated in GBM pathogenesis through several modes of action. Inhibition of Notch leads to a reduction of cancer-initiating cells in gliomas and reduces proliferation and migration. Deltex1 (DTX1) is part of an alternative Notch signaling pathway distinct from the canonical MAML1/RBPJ-mediated cascade. In this study, we show that DTX1 activates both the RTK/PI3K/PKB as well as the MAPK/ERK pathway. Moreover, we found the anti-apoptotic factor Mcl-1 to be induced by DTX1. In accordance with this, the clonogenic potential and proliferation rates of glioma cell lines correlated with DTX1 levels. DTX1 knock down mitigated the tumorigenic potential in vivo, and overexpression of DTX1 increased cell migration and invasion of tumor cells accompanied by an elevation of the pro-migratory factors PKB and Snail1. Microarray gene expression analysis identified a DTX1-specific transcriptional program - including microRNA-21 - which is distinct from the canonical Notch signaling. We propose the alternative Notch pathway via DTX1 as oncogenic factor in malignant glioma and found low DTX1 expression levels to correlate with prolonged survival of GBM and early breast cancer patients in open source databases.
Publication Title
Deltex-1 activates mitotic signaling and proliferation and increases the clonogenic and invasive potential of U373 and LN18 glioblastoma cells and correlates with patient survival.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Homo sapiens
- 5 Downloadable Samples
- Affymetrix Human Genome U133A 2.0 Array (hgu133a2)
Description
A cancer stem cell cannot be identified solely based on surface markers as none of the markers used to isolate stem cells in various normal and cancerous tissues is expressed exclusively by stem cells. Our experimental results have also identified additional fractions representing true stem-like cells in oral squamous cell carcinoma (OSCC), refuting the concept that cancer stem cells (CSCs) are a rare population, and we have also developed an in vitro model to explore the stem cell concept in oral epithelial tumorigenesis. This model expounds four distinct fractions within a homogenous cell line SCC172 that is morphologically similar (85% cells expressing CSC markers), yet varying in all functional aspects of cell cycle, dye retention, chemoresistance, tumor-forming potential, self renewal, apoptosis resistance and regulation at molecular levels. Relating to our CSC shift model, we analysed the concept of biological heterogeneity in terms of four fractions SP1, SP2, MP1 and MP2 and associated it with variations among patients in a clinical scenario.
Publication Title
Analysis of MicroRNA-mRNA Interactions in Stem Cell-Enriched Fraction of Oral Squamous Cell Carcinoma.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Mus musculus
- 2 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Using a novel class of chemically-engineered oligonucleotides, termed "antagomirs", we studied the biological significance of silencing miR-122 in the liver of mice at the mRNA level
Publication Title
Silencing of microRNAs in vivo with 'antagomirs'.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 13 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Dysregulation of Wnt/TCF signaling is closely associated with cancers arising from the gastrointestinal tract, inlcluding colon cancer and liver cancer. The goal of this study is to understand the transcriptional programs underlying Wnt/TCF activation in gastrointestinal cancers. We examined the transcriptional responses to TCF inhibition in cultured human colon cancer cells and liver cancer cells that are characteristic of Wnt pathway activation.
Publication Title
TRIB2 acts downstream of Wnt/TCF in liver cancer cells to regulate YAP and C/EBPα function.
Sample Metadata Fields
Cell line
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
FoxA transcription factors are involved in development and tumorigenesis of the gastrointestinal tract. However, the downstream programs controlled by FoxA factors remain poorly understood. The goal of this study is to understand the transcriptional responses regulated by FoxA proteins in liver and colon cancer cells.
Publication Title
TRIB2 acts downstream of Wnt/TCF in liver cancer cells to regulate YAP and C/EBPα function.
Sample Metadata Fields
Cell line
View Samples- Danio rerio
- 5 Downloadable Samples
Illumina HiSeq 2500
Description
The goal of this study was to investigate DNA methylation and gene expression changes in a zebrafish model of ICF Syndrome which were generated by mutation of ICF-gene zbtb24. Comparison of gene expression changes between wildtype and zbtb24 homozygous mutants revealed upregulation of interferon response genes following zbtb24 deletion. Upregulation of interferon response genes was blocked by mutation of the dsRNA helicase Mda5. Overall design: For RNA-seq, gene expression was compared in whole two-week-old zebrafish larvae that were wildtype or homozygous for the zbtb24mk22 mutant allele. We further performed RNA-Seq analysis in three-week-old zebrafish larvae that were WT, mda5mk29/mk29 , zbtb24mk22/mk22 and mda5mk29/mk29 ;zbtb24mk22/mk22. Three samples consisting of pools of 10 larvae were examined for each genotype. For ERRBS, DNA was separately isolated from the fins of three wildtype and three zbtb24mk22 homozygous mutant adults.
Publication Title
Pericentromeric hypomethylation elicits an interferon response in an animal model of ICF syndrome.
Sample Metadata Fields
Subject
View Samples- Homo sapiens
- 14 Downloadable Samples
- IlluminaHiSeq2000
Description
Most B cell lymphomas arise in the germinal center (GC), where humoral immune responses evolve from potentially oncogenic cycles of mutation, proliferation, and clonal selection. Although lymphoma gene expression diverges significantly from GC-B cells, underlying mechanisms that alter the activities of corresponding regulatory elements (REs) remain elusive. Here we define the complete pathogenic circuitry of human follicular lymphoma (FL), which activates or decommissions transcriptional circuits from normal GC-B cells and commandeers enhancers from other lineages. Moreover, independent sets of transcription factors, whose expression is deregulated in FL, target commandeered versus decommissioned REs. Our approach reveals two distinct subtypes of low-grade FL, whose pathogenic circuitries resemble GC-B or activated B cells. Remarkably, FL-altered enhancers also are enriched for sequence variants, including somatic mutations, which disrupt transcription factor binding and expression of circuit-linked genes. Thus, the pathogenic regulatory circuitry of FL reveals distinct genetic and epigenetic etiologies for GC-B transformation. Overall design: Expression profiles of follicular lymphoma, centrocyte and peripheral blood B cells were generated by deep sequencing, using Illumina Hi-Seq 2000.
Publication Title
NKG2D-NKG2D Ligand Interaction Inhibits the Outgrowth of Naturally Arising Low-Grade B Cell Lymphoma In Vivo.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 9 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
the molecular mechanisms for the biphasic effect of alcohol are not fully understood. The goal of the study is to identify genes that are differentially expressed following alcohol exposure of 50mM and 100mM ethanol for 24 hours.
Publication Title
Ethanol upregulates glucocorticoid-induced leucine zipper expression and modulates cellular inflammatory responses in lung epithelial cells.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 62 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
TPL-2-ERK1/2 signaling promotes host resistance against intracellular bacterial infection by negative regulation of type I IFN production.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 61 Downloadable Samples
- Illumina MouseWG-6 v2.0 expression beadchip
Description
Analysis of Mtb infected murine macrophages derived from C57Bl/6 WT, TPL2KO, IFNARKO & TPL2IFNAR DKO mice [Set 2]
Publication Title
TPL-2-ERK1/2 signaling promotes host resistance against intracellular bacterial infection by negative regulation of type I IFN production.
Sample Metadata Fields
Specimen part
View Samples