Wildtype B6, Rag1-/- B6 and Rag1-/- B6 mice harboring the 225.4 IgA producing hybridoma were colonized for 10 days with Bacteroides thetaiotaomicron
IgA response to symbiotic bacteria as a mediator of gut homeostasis.
No sample metadata fields
View SamplesDiagnosis of acute respiratory viral infection is currentlybased on clinical symptoms and pathogen detection. Use of host peripheral blood gene expression data to classify individuals with viral respiratory infection represents a novel means of infection diagnosis.
Gene expression signatures diagnose influenza and other symptomatic respiratory viral infections in humans.
Subject, Time
View SamplesTransgenic (Probasin driven Myr-AKT)or wild-type littermates were treated with RAD001 or placebo and sacrificed at 12 and 48 hours following the beginning of treatment
mTOR inhibition reverses Akt-dependent prostate intraepithelial neoplasia through regulation of apoptotic and HIF-1-dependent pathways.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Vitamin C induces Tet-dependent DNA demethylation and a blastocyst-like state in ES cells.
Specimen part, Treatment, Time
View SamplesDNA methylation is a heritable epigenetic modification involved in gene silencing, imprinting, and the suppression of retrotransposons. Global DNA demethylation occurs in the early embryo and the germline and may be mediated by Tet (ten-eleven-translocation) enzymes, which convert 5-methylcytosine (mC) to 5-hydroxymethylcytosine (hmC). Tet enzymes have been extensively studied in mouse embryonic stem (ES) cells, which are generally cultured in the absence of Vitamin C, a potential co-factor for Fe(II) 2-oxoglutarate dioxygenase enzymes like Tets. Here we report that addition of Vitamin C to ES cells promotes Tet activity leading to a rapid and global increase in hmC. This is followed by DNA demethylation of numerous gene promoters and up-regulation of demethylated germline genes. Tet1 binding is enriched near the transcription start site (TSS) of genes affected by Vitamin C treatment. Importantly, Vitamin C, but not other antioxidants, enhances the activity of recombinant human Tet1 in a biochemical assay and the Vitamin C-induced changes in hmC and mC are entirely suppressed in Tet1/2 double knockout (Tet DKO) ES cells. Vitamin C has the strongest effects on regions that gain methylation in cultured ES cells compared to blastocysts and in vivo are methylated only after implantation. In contrast, imprinted regions and intracisternal A-particle (IAP) elements, which are resistant to demethylation in the early embryo, are resistant to Vitamin C-induced DNA demethylation. Collectively, this study establishes that Vitamin C is a direct regulator of Tet activity and DNA methylation fidelity in ES cells.
Vitamin C induces Tet-dependent DNA demethylation and a blastocyst-like state in ES cells.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Analyses of a Mutant Foxp3 Allele Reveal BATF as a Critical Transcription Factor in the Differentiation and Accumulation of Tissue Regulatory T Cells.
Specimen part
View SamplesFoxP3 is a central regulator of immunological tolerance, controlling the development and function of regulatory T (Treg) cells. To dissect the complex processes orchestrated by FoxP3, we investigated impacts of three autoimmune disease-associated missense FoxP3 mutations (i.e., I363V, A384T, R397W) through knock-in mutagenesis in mice.
Analyses of a Mutant Foxp3 Allele Reveal BATF as a Critical Transcription Factor in the Differentiation and Accumulation of Tissue Regulatory T Cells.
Specimen part
View SamplesFoxP3 is a central regulator of immunological tolerance, controlling the development and function of regulatory T (Treg) cells. To dissect the complex processes orchestrated by FoxP3, we investigated impacts of three autoimmune disease-associated missense FoxP3 mutations in mice.
Analyses of a Mutant Foxp3 Allele Reveal BATF as a Critical Transcription Factor in the Differentiation and Accumulation of Tissue Regulatory T Cells.
Specimen part
View SamplesFoxP3 is a central regulator of immunological tolerance, controlling the development and function of regulatory T (Treg) cells. To dissect the complex processes orchestrated by FoxP3, we investigated impacts of three autoimmune disease-associated missense FoxP3 mutations in mice. The I363V and R397W mutations were loss-of-function mutations, causing multi-organ inflammation by globally compromising Treg cell physiology. By contrast, the A384T mutation induced a distinctive tissue-restricted inflammation by specifically impairing the ability of Treg cells to compete with pathogenic T cells in certain non-lymphoid tissues.
Analyses of a Mutant Foxp3 Allele Reveal BATF as a Critical Transcription Factor in the Differentiation and Accumulation of Tissue Regulatory T Cells.
Specimen part
View SamplesTo understand the age-dependent response to burn injury, blood samples from pediatric and adult patients were collected at different times after severe burn injury.
Analysis of factorial time-course microarrays with application to a clinical study of burn injury.
Sex, Disease
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