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Bos taurus
22 Downloadable Samples
Affymetrix Bovine Genome Array (bovine)
Description
Background: Udder infections with environmental pathogens like Escherichia coli are a serious problem for the diary industry. Reduction of incidence and severity of mastitis is desirable and mild priming of the immune system either through vaccination or with low doses of an immune stimulant like lipopolysaccharide LPS was previously found to dampen detrimental effects of a subsequent infection. Monocytes / macrophages are known to develop tolerance to the endotoxin (ET) LPS as adaptation strategy to prevent exuberant inflammation. We have recently observed that application of 1 g of LPS/udder quarter effectively protects the cow for several days from an experimentally elicited mastitis. We have modelled this process in primary cultures of Mammary Epithelial Cells (MEC) from the cow. This is by far the most abundant cell type in the udder coming into contact with invading pathogens and little is known about the role of MEC in establishing ET in the udder.
Publication Title
Lipopolysaccharide priming enhances expression of effectors of immune defence while decreasing expression of pro-inflammatory cytokines in mammary epithelia cells from cows.
Sample Metadata Fields
Specimen part, Time
View Samples- Bos taurus
- 30 Downloadable Samples
- Affymetrix Bovine Genome Array (bovine)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Escherichia coli infection induces distinct local and systemic transcriptome responses in the mammary gland.
Sample Metadata Fields
Specimen part, Time
View Samples- Bos taurus
- 29 Downloadable Samples
- Affymetrix Bovine Genome Array (bovine)
Description
Infections of the udder by Escherichia coli very often elicit acute inflammation, while Staphylococcus aureus infections tend to cause mild, subclinical inflammation and persistent infections. The molecular causes undercovering the different disease patterns are poorly understood. We therefore profiled kinetics and extent of global changes in the transcriptome of primary bovine mammary epithelia cells (MEC) subsequent to challenging them with heat inactivated preparations of E. coli or S. aureus pathogens. E. coli swiftly and strongly induced expression of cytokines and bactericidal factors. S. aureus elicited a retarded response and failed to quickly induce expression of bactericidal factors. Both pathogens induced a similar pattern of chemokines for cell recruitment into the udder, but E. coli stimulated their synthesis much faster and stronger. The genes which are exclusively and most strongly up-regulated by E. coli may be clustered into a regulatory network with Tumor necrosis factor alpha (TNF-a) and Interleukin 1 (IL-1) in a central position. In contrast, the expression of these master cytokines is barely regulated by S. aureus. Both pathogens quickly trigger enhanced expression of IL-6. This is still possible after completely abrogating MyD88 dependent TLR-signalling in MEC. The E. coli specific strong induction of TNF-a and IL-1 expression may be causative for the severe inflammatory symptoms of animals suffering from E. coli mastitis while avoidance to quickly induce synthesis of bactericidal factors may support persistent survival of S. aureus within the udder. We suggest that S. aureus subverts MyD88-dependent activation of immune gene expression in MEC.
Publication Title
Comparative kinetics of Escherichia coli- and Staphylococcus aureus-specific activation of key immune pathways in mammary epithelial cells demonstrates that S. aureus elicits a delayed response dominated by interleukin-6 (IL-6) but not by IL-1A or tumor necrosis factor alpha.
Sample Metadata Fields
Specimen part, Treatment, Time
View Samples- Bos taurus
- 10 Downloadable Samples
- Affymetrix Bovine Genome Array (bovine)
Description
By comparison of the transcriptome profiles of udder quarters neighboring to infected quarters and healthy udder tissue we analyse gene expression in the late stage of infection with E. coli 1303.
Publication Title
Escherichia coli infection induces distinct local and systemic transcriptome responses in the mammary gland.
Sample Metadata Fields
Specimen part, Time
View Samples- Bos taurus
- 10 Downloadable Samples
- Affymetrix Bovine Genome Array (bovine)
Description
By comparison of the transcriptome profiles of infected and healthy udder tissue we analyse gene expression in the late stage of infection with E. coli 1303.
Publication Title
Escherichia coli infection induces distinct local and systemic transcriptome responses in the mammary gland.
Sample Metadata Fields
Specimen part, Time
View Samples- Bos taurus
- 10 Downloadable Samples
- Affymetrix Bovine Genome Array (bovine)
Description
By comparison of the transcriptome profiles of infected and healthy udder tissue we analyse gene expression in the early stage of infection with E. coli 1303.
Publication Title
Escherichia coli infection induces distinct local and systemic transcriptome responses in the mammary gland.
Sample Metadata Fields
Specimen part, Time
View Samples
GSE2514- Mus musculus, Homo sapiens
- 83 Downloadable Samples
- Affymetrix Murine Genome U74A Version 2 Array (mgu74av2)
Description
Lung tumors
Publication Title
Analysis of orthologous gene expression between human pulmonary adenocarcinoma and a carcinogen-induced murine model.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 4 Downloadable Samples
- Affymetrix HT Human Genome U133A Array (hthgu133a)
Description
While early stages of clear cell renal cell carcinoma (ccRCC) are curable, survival outcome for metastatic ccRCC remains poor. The purpose of the current study was to apply a new individualized bioinformatics analysis (IBA) strategy to these transcriptome data in conjunction with Gene Set Enrichment Analysis of the Connectivity Map (C-MAP) database to identify and reposition FDA-approved drugs for anti-cancer therapy. We demonstrated that one of the drugs predicted to revert the RCC gene signature towards normal kidney, pentamidine, is effective against RCC cells in culture and in a RCC xenograft model. Most importantly, pentamidine slows tumor growth in the 786-O human ccRCC xenograft mouse model. To determine which genes are regulated by pentamidine in a human RCC cell line, 786-O, we treated these cells with pentamidine and performed transcriptional profiling analysis.
Publication Title
Computational repositioning and preclinical validation of pentamidine for renal cell cancer.
Sample Metadata Fields
Cell line, Treatment
View Samples- Homo sapiens
- 29 Downloadable Samples
IlluminaGenomeAnalyzerII
Description
The histological grade of carcinomas describes the ability of tumor cells to organize differentiated epithelial structures and has prognostic impact. Molecular control of differentiation in normal and cancer cells relies on lineage-determining transcription factors (TFs) that activate the repertoire of cis-regulatory elements controlling cell type-specific transcriptional outputs. TF recruitment to cognate genomic DNA binding sites results in the deposition of histone marks characteristic of enhancers and other cis-regulatory elements. Here we integrated transcriptomics and genome-wide analysis of chromatin marks in human pancreatic ductal adenocarcinoma (PDAC) cells of different grade to identify first, and then experimentally validate the sequence-specific TFs controlling grade-specific gene expression. We identified a core set of TFs with a pervasive binding to the enhancer repertoire characteristic of differentiated PDACs and controlling different modules of the epithelial gene expression program. Defining the regulatory networks that control the maintenance of epithelial differentiation of PDAC cells will help determine the molecular basis of PDAC heterogeneity and progression. Overall design: Poly(A) fraction of the total RNA from human pancreatic ductal adenocarcinoma cell lines was extracted and subjected to by multiparallel sequencing. Experiments were carried out in unmodified cells in duplicate, genome edited clonal CFPAC1 cells (2 KLF5-deleted CRISPR-Cas9 clones, 3 ELF3-deleted CRISPR-Cas9 clones and 2 wt clones) and CFPAC1 cells ectopically expressing ZEB1 or empty vector control (in duplicate).
Publication Title
Dissection of transcriptional and cis-regulatory control of differentiation in human pancreatic cancer.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 11 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We performed a time-course microarray experiment to define the transcriptional response to carboplatin in vitro, and to correlate this with clinical outcome in epithelial ovarian cancer (EOC). RNA was isolated from carboplatin and control-treated 36M2 ovarian cancer cells at several time points, followed by oligonucleotide microarray hybridization. Carboplatin induced changes in gene expression were assessed at the single gene as well as at the pathway level. Clinical validation was performed in publicly available microarray datasets using disease free and overall survival endpoints.
Publication Title
Carboplatin-induced gene expression changes in vitro are prognostic of survival in epithelial ovarian cancer.
Sample Metadata Fields
No sample metadata fields
View Samples