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Platform
GSE9874
Homo sapiens
60 Downloadable Samples
Affymetrix Human Genome U133A Array (hgu133a)
Description
The project was designed to identify genes with an altered expression in macrophages from subjects with atherosclerosis compared to macrophages from control subjects.
Publication Title
Expression profiling of macrophages from subjects with atherosclerosis to identify novel susceptibility genes.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 12 Downloadable Samples
Illumina HiSeq 2000
Description
The goal of this study was to determine the effects of dietary selenium levels on translational control of selenoprotein synthesis in mouse liver. Overall design: Wild type mice and mice expressing a mutant Sec-tRNA gene (TrspA37G) were fed diets supplemented with 0, 0.1, or 2 ppm selenium for 6 weeks. Livers were harvested and ribosome and mRNA profiles were generated by deep-sequencing using the Illumina HiSeq 2000.
Publication Title
Translational redefinition of UGA codons is regulated by selenium availability.
Sample Metadata Fields
Age, Cell line, Treatment, Subject
View Samples- Drosophila melanogaster
- 6 Downloadable Samples
- Illumina HiSeq 2500
Description
We carry out a differential RNAseq analysis of a row of sensilla on the anterior wing margin and find expression of many genes associated with pheromone and chemical perception. Overall design: We collected wings from wild type and from Poxn mutants that lack chemosensory sensilla on the wing. We performed RNAseq on three biological replicates from each genotype.
Publication Title
Chemosensory sensilla of the Drosophila wing express a candidate ionotropic pheromone receptor.
Sample Metadata Fields
Age, Specimen part, Subject
View Samples- Homo sapiens, Rattus norvegicus
- 61 Downloadable Samples
- Affymetrix Rat Genome U34 Array (rgu34a), Affymetrix Human Genome U133A Array (hgu133a)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Divergent transcriptomic responses to aryl hydrocarbon receptor agonists between rat and human primary hepatocytes.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Homo sapiens
- 40 Downloadable Samples
- Affymetrix Rat Genome U34 Array (rgu34a), Affymetrix Human Genome U133A Array (hgu133a)
Description
(Abstract) Toxicogenomics has great potential for enhancing our understanding of environmental chemical toxicity, hopefully leading to better-informed human health risk assessments. This study employed toxicogenomic technology to reveal species differences in response to two prototypical aryl hydrocarbon receptor (AHR) agonists, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and the polychlorinated biphenyl (PCB) congener PCB 126. Dose responses of primary cultures of rat and human hepatocytes were determined using species-specific microarrays sharing over 4,000 gene orthologs. Forty-seven human and 79 rat genes satisfied dose response criteria for both chemicals and were subjected to further analysis including the calculation of EC50 and the relative potency (REP) of PCB 126 for each gene. Only 5 responsive orthologous genes were shared between the two species, yet the geometric mean of the REPs for all rat and human modeled responsive genes were 0.06 (95% Confidence Interval (CI); 0.03-0.1) and 0.002 (95% CI; 0.001-0.005), respectively, suggesting broad species differences in the initial events that follow AHR activation but precede toxicity. This indicates that there are species differences in both the specific genes that responded and the agonist potency and relative potency for those genes. This observed insensitivity of human cells to PCB 126 is consistent with more traditional measurements of AHR activation (i.e., CYP1A1 enzyme activity) and suggests that the species difference in PCB 126 sensitivity is likely due to certain aspects of AHR function. That a species divergence also exists in this expanded AHR-regulated gene repertoire is a novel finding and should help when extrapolating animal data to humans.
Publication Title
Divergent transcriptomic responses to aryl hydrocarbon receptor agonists between rat and human primary hepatocytes.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Dietary Selenium Levels Affect Selenoprotein Expression and Support the Interferon-γ and IL-6 Immune Response Pathways in Mice.
Sample Metadata Fields
Sex, Specimen part
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Mice were fed Se-deficient or Se-adequate diets for 6 weeks. Liver and lung tissue were harvested and processed for RNA-Seq, ribosome profiling, and microarray analysis. From these studies, we identified changes in mRNA levels and translation of selenoprotein genes and genes regulated by interferon-gamma. Cytokine profiles of serum indicated that interferon-gamma and IL-6 levels were increased in the Se-adequate mice relative to Se-deficient mice.
Publication Title
Dietary Selenium Levels Affect Selenoprotein Expression and Support the Interferon-γ and IL-6 Immune Response Pathways in Mice.
Sample Metadata Fields
Sex, Specimen part
View Samples- Rattus norvegicus
- 12 Downloadable Samples
- Affymetrix Rat Genome U34 Array (rgu34a)
Description
Chronic exposure of Sprague-Dawley (SD) rats to either 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) or Aroclor 1254 results in female-selective induction of hepatic tumors. The relative potency of dioxins and PCB mixtures, such as Aroclor 1254, is often estimated using the internationally endorsed toxic equivalency (TEQ) approach. Comparing the genome wide changes in gene expression in both genders following exposure to toxic equivalent doses of these chemicals should identify critical sets of early response genes while further defining the concept of the TEQ of halogenated aromatic hydrocarbons. Aroclor 1254 at 0.6, 6.0 and 60 mg/kg body weight and TEQ doses of TCDD (0.3 and 3.0 g/kg), calculated to match the top two Aroclor 1254 doses, were orally administered to SD rats for three consecutive days. Day 4 gene expression in hepatic tissue was determined using microarrays. A linear mixed-effects statistical model was developed to analyze the data in relation to treatment, gender, and gender*treatment (G*T) interactions. The genes most changed included 54 genes with and 51 genes without a significant model G*T term. The known aryl hydrocarbon receptor (AHR) battery genes (Cyp1a1, Cyp1a2, Cyp1b1, Aldh3a1), and novel genes, responded in a TEQ dose-dependent manner in both genders. However, an important observation was the apparent disruption of sexually dimorphic basal gene expression, particularly for female rats. Since many of these genes are involved in steroid metabolism, exposure to either TCDD or Aroclor 1254 could disrupt proliferative signals more in female rats as a possible consequence of altered estrogen metabolism. This study extends the findings of previous rodent bioassays by identifying groups of genes, other than the well-characterized AHR response genes, whose disruption may be important in the tumorigenic mechanism in this rat strain.
Publication Title
Toxicogenomic analysis of gender, chemical, and dose effects in livers of TCDD- or aroclor 1254-exposed rats using a multifactor linear model.
Sample Metadata Fields
Sex
View Samples- Mus musculus
- 8 Downloadable Samples
- Illumina HiSeq 2000
Description
Mice were fed Se-deficient or Se-adequate diets for 6 weeks. Liver and lung tissue were harvested and processed for RNA-Seq, ribosome profiling, and microarray analysis. From these studies, we identified changes in mRNA levels and translation of selenoprotein genes and genes regulated by interferon-gamma. Cytokine profiles of serum indicated that interferon-gamma and IL-6 levels were increased in the Se-adequate mice relative to Se-deficient mice. Overall design: Ribosome profiling of liver tissue from mice fed Se-deficient or Se-adequate diets
Publication Title
Dietary Selenium Levels Affect Selenoprotein Expression and Support the Interferon-γ and IL-6 Immune Response Pathways in Mice.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 4 Downloadable Samples
- Illumina HiSeq 2000
Description
Mice were fed Se-deficient or Se-adequate diets for 6 weeks. Liver and lung tissue were harvested and processed for RNA-Seq, ribosome profiling, and microarray analysis. From these studies, we identified changes in mRNA levels and translation of selenoprotein genes and genes regulated by interferon-gamma. Cytokine profiles of serum indicated that interferon-gamma and IL-6 levels were increased in the Se-adequate mice relative to Se-deficient mice. Overall design: RNA-Seq analysis of liver tissue from mice fed Se-deficient or Se-adequate diets
Publication Title
Dietary Selenium Levels Affect Selenoprotein Expression and Support the Interferon-γ and IL-6 Immune Response Pathways in Mice.
Sample Metadata Fields
No sample metadata fields
View Samples