Under microscope, MH-S cells show a heterogenous population. By clonal dilution, we generated single cell colonies and found that a set of clones that secreted higher the IL-4Ra regulating protein (“High IL-4Ra activity clones”) and set of colonies secreted lower amount (“Low IL-4Ra activity clones”).
IL-4 controls activated neutrophil FcγR2b expression and migration into inflamed joints.
Specimen part, Cell line, Treatment
View SamplesLysine methylation of histones is associated with both transcriptionally active chromatin and with silent chromatin, depending on what residue is modified. Histone methyltransferases and demethylases ensure that histone methylations are dynamic and can vary depending on cell cycle- or developmental stage. KDM4A demethylates H3K36me3, a modification enriched in the 3end of active genes. The genomic targets and the role of KDM4 proteins in development remain largely unknown.
Gene regulation by the lysine demethylase KDM4A in Drosophila.
No sample metadata fields
View SamplesThe Brakeless protein performs many important functions during Drosophila development, but how it controls gene expression is not understood. We previously showed that Brakeless can function as a transcriptional co-repressor. Here, we report transcriptional profiling of brakeless mutant embryos to identify additional target genes.
The Brakeless co-regulator can directly activate and repress transcription in early Drosophila embryos.
Specimen part
View SamplesGrainy head (Grh) is a conserved transcription factor (TF) controlling epithelial differentiation and regeneration. To elucidate Grh functions, we identified embryonic Grh targets by ChIP-seq and gene expression analysis. We show that Grh controls hundreds of target genes. Repression or activation correlates with the distance of Grh binding sites to the transcription start sites of its targets. Analysis of 54 Grh-responsive enhancers during development and upon wounding suggests cooperation with distinct TFs in different contexts. In the airways, Grh repressed genes encode key TFs involved in branching and cell differentiation. Reduction of the POU-domain TF, Vvl, (ventral veins lacking) largely ameliorates the airway morphogenesis defects of grh mutants. Vvl and Grh proteins additionally interact with each other and regulate a set of common enhancers during epithelial morphogenesis. We conclude that Grh and Vvl participate in a regulatory network controlling epithelial maturation.
Genome-wide identification of Grainy head targets in <i>Drosophila</i> reveals regulatory interactions with the POU domain transcription factor Vvl.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Genome-wide identification of Grainy head targets in <i>Drosophila</i> reveals regulatory interactions with the POU domain transcription factor Vvl.
No sample metadata fields
View SamplesA biobank collection of carotid plaque samples taken from patients undergoing endarterectomy operations.
Prediction of ischemic events on the basis of transcriptomic and genomic profiling in patients undergoing carotid endarterectomy.
Specimen part, Disease, Subject
View SamplesTo explore the mechanisms responsible for spatial and temporal regulation of the growth plate, we microdissected postnatal rat growth plates into their constituent zones and then used microarray analysis to characterize the changes in gene expression that occur as chondrocytes undergo spatially-associated differentiation and temporally-associated senescence.
Spatial and temporal regulation of gene expression in the mammalian growth plate.
Age
View SamplesBackground
Distinct roles of the Gcn5 histone acetyltransferase revealed during transient stress-induced reprogramming of the genome.
Treatment
View SamplesObjective: Shear forces play a key role in the maintenance of vessel wall integrity. Current understanding regarding shear-dependent gene expression is mainly based on in vitro or in vivo observations with experimentally deranged shear, hence reflecting acute molecular events in relation to flow. Our objective was to combine computational fluid dynamic (CFD) simulations with global microarray analysis to study flow-dependent vessel wall biology in portions of the entire aorta under physiological conditions. Methods and Results: Animal-specific WSS magnitude and vector direction were estimated using CFD based on aortic geometry and flow information acquired by MRI. Two distinct flow pattern regions were identified in the normal rat aorta; the distal part of the inner curvature being exposed to low WSS and a non-uniform vector direction, and a region along the outer curvature being subjected to markedly higher levels of WSS and a uniform vector direction. Microarray analysis identified numerous novel mechanosensitive genes, including Hand2, trpc4 and slain2, and confirmed well-known ones, such as klf2 and BMP4. Three genes were further validated for protein , including Hand2, which showed higher expression in the endothelium in regions exposed to disturbed flow. Gene ontology analysis revealed an over-representation of genes involved in transcriptional regulation.
Characterization of shear-sensitive genes in the normal rat aorta identifies Hand2 as a major flow-responsive transcription factor.
Specimen part
View SamplesThe regulatory gene pathways underlying the loss of adipose tissue in cancer cachexia are unknown and were explored using pangenomic transcriptome profiling.
No associated publication
No sample metadata fields
View Samples