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Mus musculus
6 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Activity-dependent transcriptional profiling was performed in the basolateral amygdala in order to identify unique genetic markers for functionally distinct neuronal populations
Publication Title
Antagonistic negative and positive neurons of the basolateral amygdala.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 9 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The culture of neural stem cells (NSCs) as floating neurospheres has become widely used as an experimental model to analyse the properties of NSCs. Although the neurosphere model has existed for two decades, there is still no standard protocol to grow NSCs in this way. Thus, we have analysed the consequences of the frequency of growth factor (FGF-2 and EGF) addition to embryonic and adult olfactory bulb stem cells (eOBSCs and aOBSCs) cultures, specifically in terms of proliferation, cell cycle progression, death and differentiation, as well as on global changes in gene expression and signaling pathways. We found that addition of FGF-2 and EGF every two or four days rather than daily significantly reduces the volume of the neurospheres and the total number of cells, changes that were more evident in aOBSC than in eOBSC cultures. The reduction in neurosphere size was mainly due to an increase in cell death and occurs without major changes in the cell cycle parameters tested. Moreover, partial deprivation of FGF-2 and EGF produces a mild increase in aOBSC differentiation during the proliferative phase. Remarkably, these effects were accompanied by a significant upregulation in the expression of genes involved in cell death regulation (Cryab), lipid catabolic processes (Pla2g7), cell adhesion (Dscaml1), cell differentiation (Dscaml1, Gpr17, S100b) and signal transduction (Gpr17, Ndrg2), among others. These findings support that continuous supply of FGF-2 and EGF is critical to maintain the viability/survival of NSCs in culture and reveals novel molecular hallmarks of NSC maintenance/survival and expansion in response to these growth factors.
Publication Title
A global transcriptome analysis reveals molecular hallmarks of neural stem cell death, survival, and differentiation in response to partial FGF-2 and EGF deprivation.
Sample Metadata Fields
Specimen part
View Samples- Drosophila melanogaster
- 12 Downloadable Samples
- Affymetrix Drosophila Genome 2.0 Array (drosophila2)
Description
To understand the role of MiT in Drosophila, we set out to identify critical gene targets by looking at changes in the WT transcriptome induced by either gain or loss of MiT function. Mutant hindgut and malpighian tubules provided loss-of function tissue and nub-Gal4-driven expression of MiT in the wing epithelium was used for gain-of-function. In the wing disc experiment, 543 genes were upregulated by exogenous MiT, and 359 genes were downregulated (>1.4 fold; P value < 0.01). In the larval HG+MT, 897 genes were downregulated and 898 were upregulated (>1.4 fold; P value < 0.01) after MiT. Among these genes, 85 were both upregulated in wing discs and downregulated in mutant HG+MT, and are the common genes that regulated by MiT in both tissues.
Publication Title
Mitf is a master regulator of the v-ATPase, forming a control module for cellular homeostasis with v-ATPase and TORC1.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 76 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Pheochromocytomas are neural crest-derived tumors that arise from inherited or sporadic mutations in at least six independent genes: RET, VHL, NF1, and subunits B, C and D of succinate dehydrogenase (SDH). The proteins encoded by these multiple genes regulate distinct functions. To identify molecular interactions between the distinct pathways we performed expression profiling of a large cohort of pheochromocytomas. We show here a functional link between tumors with VHL mutations and those with disruption of the genes encoding for succinate dehydrogenase (SDH) subunits B (SDHB) and D (SDHD). A transcription profile of reduced oxidoreductase is detected in all three of these tumor types, together with an angiogenesis/hypoxia profile typical of VHL dysfunction. The oxidoreductase defect, not previously detected in VHL-null tumors, is explained by suppression of the SDHB protein, a component of mitochondrial complex II. The decrease in SDHB is also noted in tumors with SDHD mutations. Gain-of-function and loss-of-function analyses show that the link between hypoxia signals (via VHL) and mitochondrial signals (via SDH) is mediated by HIF1?. These findings explain the shared features of pheochromocytomas with VHL and SDH mutations and suggest an additional mechanism for increased HIF1? activity in tumors.
Publication Title
A HIF1alpha regulatory loop links hypoxia and mitochondrial signals in pheochromocytomas.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 16 Downloadable Samples
Illumina HiSeq 2000, Affymetrix Human Genome U219 Array (hgu219)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Cell-Cycle-Dependent Reconfiguration of the DNA Methylome during Terminal Differentiation of Human B Cells into Plasma Cells.
Sample Metadata Fields
Specimen part, Subject
View Samples- Homo sapiens
- 16 Downloadable Samples
Affymetrix Human Genome U219 Array (hgu219), Illumina HiSeq 2000
Description
Molecular mechanisms underlying terminal differentiation of B-cells into plasma cells are major determinants of adaptive immunity but remain only partially understood. Here, we present the transcriptional and epigenomic landscapes of cell subsets arising from activation of human naive B-cells and differentiation into plasmablasts. Cell proliferation of activated B cells was linked to a slight decrease in DNA methylation levels but followed by a committal step in which an S-phase-synchronized differentiation switch was associated with an extensive DNA demethylation and local acquisition of 5-hydroxymethylcytosine at enhancers and genes related to plasma cell identity.
Publication Title
Cell-Cycle-Dependent Reconfiguration of the DNA Methylome during Terminal Differentiation of Human B Cells into Plasma Cells.
Sample Metadata Fields
No sample metadata fields
View Samples
GSE28238- Homo sapiens
- 35 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Categorisation of LGGs related to their lesion site (infratentorial vs. supratentorial)
Publication Title
Molecular fingerprinting reflects different histotypes and brain region in low grade gliomas.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 4 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
LncRNA Expression Discriminates Karyotype and Predicts Survival in B-Lymphoblastic Leukemia.
Sample Metadata Fields
Specimen part, Disease, Treatment
View Samples- Homo sapiens
- 4 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Long non-coding RNAs (lncRNAs) have been found to play a role in gene regulation with dysregulated expression in various cancers. The precise role that lncRNA expression plays in the pathogenesis of B-acute lymphoblastic leukemia (B-ALL) is unknown. Therefore, unbiased microarray profiling was performed on human B-ALL specimens and it was determined that lncRNA expression correlates with cytogenetic abnormalities, which was confirmed by RT-qPCR in a large set of B-ALL cases. Importantly, high expression of BALR-2 correlated with poor overall survival and diminished response to prednisone treatment. In line with a function for this lncRNA in regulating cell survival, BALR-2 knockdown led to reduced proliferation, increased apoptosis, and increased sensitivity to prednisolone treatment. Conversely, overexpression of BALR-2 led to increased cell growth and resistance to prednisone treatment. Interestingly, BALR-2 expression was repressed by prednisolone treatment and its knockdown led to upregulation of the glucocorticoid response pathway in both human and mouse B-cells. Together, these findings indicate that BALR-2 plays a functional role in the pathogenesis and/or clinical responsiveness of B-ALL and that altering the levels of particular lncRNAs may provide a future direction for therapeutic development.
Publication Title
LncRNA Expression Discriminates Karyotype and Predicts Survival in B-Lymphoblastic Leukemia.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Homo sapiens
- 85 Downloadable Samples
- Affymetrix Human Transcriptome Array 2.0 (hta20)
Description
We examined if pediatric AMLs rank-ordered according to C/EBP expression showed the activation of similar pathways. AML samples were dichotomized into groups including the upper quartile (Q1) and the lower three quartiles (Q2-4) according to their C/EBP expression values. Moreover, AML samples were associated to French-American-British (FAB) classification.
Publication Title
CREB engages C/EBPδ to initiate leukemogenesis.
Sample Metadata Fields
Specimen part, Disease
View Samples