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GSE8527
Homo sapiens
31 Downloadable Samples
Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Infection of the human host by Streptococcus pneumoniae begins with colonization of the nasopharynx, which is mediated by adherence of bacteria to respiratory epithelium. Several studies have indicated an important role for the pneumococcal capsule in this process. Here, we used microarrays to characterize the in vitro transcriptional response of human nasopharyngeal epithelial Detroit 562 cells to adherence of serotype 2-encapsulated strain D39, serotype 19F-encapsulated strain G54, serotype 4-encapsulated strain TIGR4, and their nonencapsulated derivatives (cps). In total, 322 genes were found to be upregulated in response to adherent pneumococci. Twenty-two genes were commonly induced, including those encoding several cytokines (e.g., IL-1, IL-6), chemokines (e.g., IL-8, CXCL1/2), and transcriptional regulators (e.g., FOS), consistent with an innate immune response mediated by Toll-like receptor signaling. Interestingly, 85% of genes was induced specifically by one or more encapsulated strains, suggestive of a capsule-dependent response. Importantly, purified capsular polysaccharides alone had no effect. Over a third of these loci encoded products predicted to be involved in transcriptional regulation and signal transduction, in particular MAPK signaling pathways. Real-time PCR of a subset of ten genes confirmed microarray data and showed a time-dependent upregulation of especially innate immunity genes. Downregulation of epithelial genes was most pronounced upon adherent D39cps, as 68% of the 161 genes identified was only repressed using this nonencapsulated strain. In conclusion, we identified a subset of host genes specifically induced by encapsulated strains during in vitro adherence, and have demonstrated the complexity of interactions occurring during the initial stages of pneumococcal infection.
Publication Title
Analysis of the in vitro transcriptional response of human pharyngeal epithelial cells to adherent Streptococcus pneumoniae: evidence for a distinct response to encapsulated strains.
Sample Metadata Fields
No sample metadata fields
View Samples- Gallus gallus
- 31 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
Sample Metadata Fields
Cell line, Time
View Samples- Gallus gallus
- 21 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
Toxoplasma gondii is a ubiquitous protozoan pathogen able to infect both mammalian and avian hosts. Surprisingly, just three strains appear to account for the majority of isolates from Europe and N. America.
Publication Title
Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
Sample Metadata Fields
Cell line, Time
View Samples- Gallus gallus
- 6 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
Toxoplasma gondii is a ubiquitous protozoan pathogen able to infect both mammalian and avian hosts. Surprisingly, just three strains appear to account for the majority of isolates from Europe and N. America.
Publication Title
Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
Sample Metadata Fields
Cell line, Time
View Samples- Mus musculus
- 4 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Infection of RAW264.7 cells with RHku80 parasites or mock-infection for 24 hours
Publication Title
Infection by Toxoplasma gondii specifically induces host c-Myc and the genes this pivotal transcription factor regulates.
Sample Metadata Fields
Cell line
View Samples- Gallus gallus
- 4 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
Toxoplasma gondii is a ubiquitous protozoan pathogen able to infect both mammalian and avian hosts. Surprisingly, just three strains appear to account for the majority of isolates from Europe and N. America.
Publication Title
Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
Sample Metadata Fields
Cell line, Time
View Samples- Homo sapiens
- 207 Downloadable Samples
- Affymetrix HT HG-U133+ PM Array Plate (hthgu133pluspm)
Description
Schizophrenia is associated with alterations in working memory that reflect dysfunction of dorsolateral prefrontal cortex (DLPFC) circuitry. Working memory depends on the activity of excitatory pyramidal cells in DLPFC layer 3, and to a lesser extent in layer 5.
Publication Title
Distinctive transcriptome alterations of prefrontal pyramidal neurons in schizophrenia and schizoaffective disorder.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 22 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Comparison of Total RNA and Polysome-bound RNA populations in deltaTOR containing cells and control cells upon hepatocyitc differentiation.
Publication Title
Mammalian target of rapamycin activation impairs hepatocytic differentiation and targets genes moderating lipid homeostasis and hepatocellular growth.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Arabidopsis thaliana
- 2 Downloadable Samples
- Affymetrix Arabidopsis Genome Array (ag)
Description
Effect of JMT overexpression in global gene expression
Publication Title
Complement analysis of xeroderma pigmentosum variants.
Sample Metadata Fields
No sample metadata fields
View Samples- Drosophila melanogaster
- 70 Downloadable Samples
- Affymetrix Drosophila Genome Array (drosgenome1)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Control of daily transcript oscillations in Drosophila by light and the circadian clock.
Sample Metadata Fields
No sample metadata fields
View Samples