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GSE84713
Homo sapiens
28 Downloadable Samples
Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Head and neck cancer is a hetergeneous disease. Based on previoulsy defined molecular subtypes we associated gene expression with response to different compounds. We used microarry gene expression for molecular subtyping
Publication Title
Basal subtype is predictive for response to cetuximab treatment in patient-derived xenografts of squamous cell head and neck cancer.
Sample Metadata Fields
No sample metadata fields
View Samples- Caenorhabditis elegans
- 15 Downloadable Samples
- Affymetrix C. elegans Genome Array (celegans)
Description
Elevated levels of adsorbable organic bromine compounds (AOBr) have been detected in German lakes, and cyanobacteria like Microcystis, which are known for the synthesis of microcystins, are one of the main producers of natural organobromines. However, very little is known about how environmental realistic concentrations of organobromines impact invertebrates. Here, the nematode C. elegans was exposed to AOBr-containing surface water samples and to a Microcystis aeruginosa enriched batch culture (MC-BA) and compared to single organobromines and microcystin-LR exposures. Stimulatory effects were observed in certain life trait variables, which were particularly pronounced in nematodes exposed to MC-BA. A whole genome DNA-microarray revealed that MC-BA led to the differential expression of more than 2000 genes, many of which are known to be involved in metabolic, neurologic, and morphologic processes. Moreover, the up-regulation of cyp- and the down-regulation of abu-genes suggested the presence of chronic stress. However, the nematodes were not marked by negative phenotypic responses. The observed difference in MC-BA and microcystin-LR (which impacted lifespan, growth and reproduction) exposed nematodes was hypothesized to be likely due to other compounds within the batch culture. Most likely the exposure to low concentrations of organobromines appears to buffer the effects of toxic substances, like microcystin-LR.
Publication Title
No associated publication
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Gene 2.0 ST Array (mogene20st)
Description
Animal models have enhanced our understanding of the pathogenesis of autoimmune diseases. For these models, genetically identical, inbred mice have commonly been used. Different inbred mouse strains, however, show a high variability in disease manifestation. Identifying the factors that influence this disease variability could provide unrecognized insights into pathogenesis. We established a novel antibody transfer-induced model of epidermolysis bullosa acquisita (EBA), an autoimmune disease characterized by (muco)-cutaneous blistering caused by anti-type VII collagen (COL7) autoantibodies. Blistering after anti-COL7 IgG (directed against the von-Willebrand-factor A like domain 2) transfer showed clear variability among inbred mouse strains; i.e. severe cutaneous blistering and inflammation in C57Bl/6J, and absence of skin lesions in MRL/MpJ mice. The transfer of anti-COL7 IgG into irradiated, EBA-resistant MRL/MpJ mice, rescued by transplantation with bone marrow from EBA-susceptible B6.AK-H2k mice, induced blistering. To the contrary, irradiated EBA-susceptible B6.AK-H2k mice that were rescued using MRL/MpJ bone marrow were devoid of blistering. In vitro, immune complex activation of neutrophils from C57Bl/6J or MRL/MpJ mice showed an impaired ROS release from the latter, whereas no differences were observed after PMA activation. This finding was paralleled by divergent expression profiles of immune-complex activated neutrophils from either C57Bl/6J or MRL/MpJ mice. Collectively, we demonstrate that radiosensitive cells determine the varying extent of skin inflammation and blistering in the end-stage effector phase of EBA.
Publication Title
Radiosensitive Hematopoietic Cells Determine the Extent of Skin Inflammation in Experimental Epidermolysis Bullosa Acquisita.
Sample Metadata Fields
Disease
View Samples- Arabidopsis thaliana
- 24 Downloadable Samples
- Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
Phosphate (Pi) deficiency triggers the differential expression of a large set of genes, which communally adapt the plant to low Pi bioavailability.
Publication Title
Coexpression-based clustering of Arabidopsis root genes predicts functional modules in early phosphate deficiency signaling.
Sample Metadata Fields
Specimen part
View Samples- Arabidopsis thaliana
- 12 Downloadable Samples
- Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
The CHLD and CHLM genes encode proteins involved in tetrapyrrole biosynthesis pathway. It was proposed that intermediates like magnesium protoporphyrin might play a role in retrograde plastid-to-nucleus signaling. In the present work we provide evidence that altered enzymes activity of the tetrapyrrole biosynthesis pathway are causing changes in gene expression of over 200 nuclear genes.
Publication Title
No associated publication
Sample Metadata Fields
Age, Specimen part
View Samples- Arabidopsis thaliana
- 9 Downloadable Samples
- Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
5-aminolevulinic acid (ALA) is the common precursor of all biological synthezised tetrapyrroles. Inhibition of ALA synthesis results in decreased amounts of chlorophylls, heme, siroheme and phytochrome. It was previously shown that 4 out of 5 Arabidopsis mutants uncoupling nuclear gene expression from the physiological state of the chloroplast are affected in plant tetrapyrrole biosynthesis. It is common to all four mutants to show a reduced ALA formation.
Publication Title
Evidence for a Contribution of ALA Synthesis to Plastid-To-Nucleus Signaling.
Sample Metadata Fields
Age, Specimen part
View Samples- Arabidopsis thaliana
- 24 Downloadable Samples
- Arabidopsis Gene 1.1 ST Array (aragene11st)
Description
Resistance against Verticillium longisporum is quantitative and multigenic. The vec1 QTL in Arabidopsis thaliana controlled resistance against systemic colonization by the fungus. Gene expression was studied to identify genes and pathways controlled by vec1. Near-isogenic lines derived from the resistant ecotype Bur and the susceptible ecotype Ler were compared. NIL9 contained Ler-alleles in the genomic region between 11753 and 12285 kb within vec1 on chromosome 2, tmNIL130 contained Bur-alleles. Microarrays were performed on samples containing the hypocotyl and the shoot basis because colonization is stopped in this region in resistant genotypes. Two developmental stages were studied: time-point (1) at the onset of flowering, when systemic colonization was shown to start and time point (2) at the onset of silique maturity, when extensive fungal proliferation was shown to occur. Two pathogen treatments were studied: (1) mock-inoculated controls, (2) plants inoculated with the V. longipsorum isolate 43 (VL).
Publication Title
No associated publication
Sample Metadata Fields
Time
View Samples- Homo sapiens
- 33 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
To investigate potential differences between strong and weak oscillators at the gene expression level we carried out a transcriptome analysis for each cell line. Our results indicate that phenotypic circadian clock differences are reflected by gene expression differences both in genes of the core network, but also in additional genes not directly associated with circadian clock functions.
Publication Title
Ras-mediated deregulation of the circadian clock in cancer.
Sample Metadata Fields
Specimen part, Cell line, Time
View Samples- Mus musculus
- 21 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Using these samples, it has been shown that the transcriptional landscape in glomeruli of Ercc1[-/] mice at a rather young age of 14 weeks mimics that of mice which have undergone real-life renal aging. Thus, young Ercc1[-/] mice can be used as a model system for glomerular aging in future studies.
Publication Title
No associated publication
Sample Metadata Fields
Age
View Samples- Mus musculus
- 20 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The methyl-cytosine binding protein 2 (MeCP2) is a reader of epigenetic DNA methylation marks and necessary and sufficient to reorganize 3D heterochromatin structure during cellular differentiation, e.g., myogenesis. In addition to global expression profile changes, myogenic differentiation is accompanied by 3D-heterochromatin reorganization that is dependent on MeCP2. MeCP2 is enriched at pericentric heterochromatin foci (chromocenters). During myogenesis, the total heterochromatin foci number per nucleus decreases while foci volumes and MeCP2 protein levels increase. Ectopic MeCP2 is able to mimic similar heterochromatin restructuring in the absence of differentiation.
Publication Title
Gene repositioning within the cell nucleus is not random and is determined by its genomic neighborhood.
Sample Metadata Fields
Specimen part, Cell line
View Samples