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GSE21966
Pseudomonas aeruginosa
38 Downloadable Samples
Affymetrix Pseudomonas aeruginosa Array (paeg1a)
Description
Pseudomonas aeruginosa chronically colonizes the lungs of individuals with CF, where it reaches high cell densities and produces a battery of virulence factors. Upon infection, a single strain of P. aeruginosa can colonize an individuals lungs throughout his or her lifetime. To understand the evolution of P. aeruginosa during chronic lung infection, we conducted both genotypic and phenotypic analyses on clinical isogenic strains obtained from the lungs of three different individuals with CF. These strains were isolated over a period of approximately ten years and possess phenotypes that are commonly observed in isolates from the CF lung, such as the antibiotic resistant dwarf and mucoid phenotypes. Microarray analyses were carried out on isolates grown in a chemically defined medium that mimics the nutritional environment of the CF lung, synthetic CF sputum medium (SCFM).
Publication Title
Parallel evolution in Pseudomonas aeruginosa over 39,000 generations in vivo.
Sample Metadata Fields
Time
View Samples- Homo sapiens
- 29 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
IFN, an effective therapy against relapsing-remitting (RR) multiple sclerosis (MS) is naturally secreted during the innate immune response against viral pathogens. The objective of this study was to characterize the immunomodulatory mechanisms of IFN targeting innate immune response and their effects on DC-mediated regulation of T-cell differentiation. We found that IFN1a in-vitro treatment of human monocyte-derived dendritic cells (DCs) induced the expression of TLR7 and the members of its downstream signaling pathway, including myeloid differentiation factor 88 (MyD88), IL-1R-associated kinase (IRAK)4, and TNF receptor-associated factor (TRAF)6, while it inhibited the expression of IL-1R. Using siRNA TLR7 gene silencing, we confirmed that IFN-1a-induced changes in MyD88, IRAK4 and IL-1R expression were dependent on TLR7. TLR7 expression was also necessary for the IFN-1a-induced inhibition of IL-1 and IL-23, and the induction of IL-27 secretion by DCs. Supernatant (SN) transfer experiments confirmed that IFN-1a-induced changes in DCs cytokine secretion inhibit Th17 cell differentiation as evidenced by the inhibition of retinoic acid-related orphan nuclear hormone receptor C (RORC) and IL-17A gene expression and IL-17A secretion. Our study has identified a novel therapeutic mechanism of IFN1a, that selectively targets the autoimmune response in MS.
Publication Title
IFN-beta1a inhibits the secretion of Th17-polarizing cytokines in human dendritic cells via TLR7 up-regulation.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 2 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Early onset sepsis due to Group B streptococcus (GBS) leads to neonatal morbidity, increased mortality and long term neurological deficencies. Interaction between septicemic GBS and confluent monlayers of human coronary artery endothelial cells (HCAEC) was analyzed by a genome wide expression profiling. Regulation of selected genes and proteins identified in the gene array analysis was confirmed by Real Time RT-PCR assay (Granulocyte chemotactic protein 2 (CXCL6)), ELISA (Urokinase, Cyclooxygenase 2 (COX2), Granulocyte chemotactic protein 1 (IL8)) and Western Blotting (Heme oxygenase1, BCL2 interacting protein (BIM)) at various time points between 4 and 24 hours. In total, 124 genes were differentially regulated (89 upregulated, 35 downregulated) based on a more than 3-fold difference to unstimulated HCAEC. Regulated genes are involved in apoptosis, hemostasis, oxidative stress response, infection and inflammation. We confirmed upregulation of urokinase (UPA), COX2, HMOX1 and BCL2 interacting protein and downregulation of CXCL6 and IL8. These results indicate that GBS infection might lead to impaired function of the innate immune system and might contribute to hemorrhagic and inflammatory complications during GBS sepsis.
Publication Title
Infection of human coronary artery endothelial cells by group B streptococcus contributes to dysregulation of apoptosis, hemostasis, and innate immune responses.
Sample Metadata Fields
No sample metadata fields
View Samples- Drosophila melanogaster
- 36 Downloadable Samples
Illumina HiSeq 2500
Description
The goal of this project was to assess differential gene expression in the Ventral Nerve Cord (VNC) of adult Drosophila 5 hours after severing of the legs, wings and head. Overall design: Gene expression was assessed in 2 conditions (No Injury and 5-hrs after Injury) in the w1118 strain of Drosophila melanogaster. 5 independent biological replicates were used for each condition. RNA was isolated from the adult Ventral Nerve Cord (VNC) for the gene expression analysis (RNAseq).
Publication Title
A novel <i>Drosophila</i> injury model reveals severed axons are cleared through a Draper/MMP-1 signaling cascade.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Drosophila melanogaster
- 64 Downloadable Samples
- Affymetrix Drosophila Genome 2.0 Array (drosophila2)
Description
Translational control is critical for early Drosophila embryogenesis and is exerted mainly at the gene-specific level.
Publication Title
Global analyses of mRNA translational control during early Drosophila embryogenesis.
Sample Metadata Fields
No sample metadata fields
View Samples- Danio rerio
- 12 Downloadable Samples
- IlluminaHiSeq2000
Description
Olfactory sensory neurons express just one out of a possible ~1000 odorant receptor genes, reflecting an exquisite mode of gene regulation. In one model, once an odorant receptor is chosen for expression, other receptor genes are suppressed by a negative feedback mechanism, ensuring a stable functional identity of the sensory neuron for the lifetime of the cell. The signal transduction mechanism subserving odorant receptor gene silencing remains obscure, however. Here we demonstrate in the zebrafish that odorant receptor gene silencing is dependent on receptor activity. Moreover, we show that signaling through G protein ß? subunits is both necessary and sufficient to suppress the expression of odorant receptor genes, and likely acts through histone methylation to maintain the silenced odorant receptor genes in transcriptionally inactive heterochromatin. These results provide new insights linking receptor activity with the epigenetic mechanisms responsible for ensuring the expression of one odorant receptor per olfactory sensory neuron. Overall design: Total 6 samples were analyzed-3 controls & 3 samples
Publication Title
Normalization of RNA-seq data using factor analysis of control genes or samples.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 74 Downloadable Samples
Affymetrix Mouse Expression 430A Array (moe430a), Affymetrix Murine Genome U74A Version 2 Array (mgu74av2)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Analysis of gene expression during neurite outgrowth and regeneration.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Mus musculus
- 26 Downloadable Samples
- Affymetrix Murine Genome U74A Version 2 Array (mgu74av2)
Description
We have undertaken a genome-wide study of transcriptional activity in embryonic superior cervical ganglia (SCG) and dorsal root ganglia (DRG) during a time course of neurite outgrowth in vitro. Gene expression observed in these models likely includes both developmental gene expression patterns and regenerative responses to axotomy, which occurs as the result of tissue dissection. Comparison across both models revealed many genes with similar gene expression patterns during neurite outgrowth. These patterns were minimally affected by exposure to the potent inhibitory cue Semaphorin3A, indicating that this extrinsic cue does not exert major effects at the level of nuclear transcription. We also compared our data to several published studies of DRG and SCG gene expression in animal models of regeneration, and found the expression of a large number of genes in common between neurite outgrowth in vitro and regeneration in vivo.
Publication Title
Analysis of gene expression during neurite outgrowth and regeneration.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Mus musculus
- 26 Downloadable Samples
- Affymetrix Murine Genome U74A Version 2 Array (mgu74av2)
Description
We have undertaken a genome-wide study of transcriptional activity in embryonic superior cervical ganglia (SCG) and dorsal root ganglia (DRG) during a time course of neurite outgrowth in vitro. Gene expression observed in these models likely includes both developmental gene expression patterns and regenerative responses to axotomy, which occurs as the result of tissue dissection. Comparison across both models revealed many genes with similar gene expression patterns during neurite outgrowth. These patterns were minimally affected by exposure to the potent inhibitory cue Semaphorin3A, indicating that this extrinsic cue does not exert major effects at the level of nuclear transcription. We also compared our data to several published studies of DRG and SCG gene expression in animal models of regeneration, and found the expression of a large number of genes in common between neurite outgrowth in vitro and regeneration in vivo.
Publication Title
Analysis of gene expression during neurite outgrowth and regeneration.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Mus musculus
- 22 Downloadable Samples
- Affymetrix Murine Genome U74A Version 2 Array (mgu74av2), Affymetrix Mouse Expression 430A Array (moe430a)
Description
We have undertaken a genome-wide study of transcriptional activity in embryonic superior cervical ganglia (SCG) and dorsal root ganglia (DRG) during a time course of neurite outgrowth in vitro. Gene expression observed in these models likely includes both developmental gene expression patterns and regenerative responses to axotomy, which occurs as the result of tissue dissection. Comparison across both models revealed many genes with similar gene expression patterns during neurite outgrowth. These patterns were minimally affected by exposure to the potent inhibitory cue Semaphorin3A, indicating that this extrinsic cue does not exert major effects at the level of nuclear transcription. We also compared our data to several published studies of DRG and SCG gene expression in animal models of regeneration, and found the expression of a large number of genes in common between neurite outgrowth in vitro and regeneration in vivo.
Publication Title
Analysis of gene expression during neurite outgrowth and regeneration.
Sample Metadata Fields
Specimen part, Treatment
View Samples