Here, we report on experiments in double-transgenic mice, in which RFP is expressed in all Foxp3+ Treg cells, whereas Foxp3-dependent GFP expression is exclusively confined to intrathymically induced Foxp3+ Treg cells. This novel molecular genetic tool enabled us to faithfully track and characterize naturally induced Treg cells of intrathymic (RFP+GFP+) and extrathymic (RFP+GFP) origin in otherwise unmanipulated mice.
Fluorochrome-based definition of naturally occurring Foxp3(+) regulatory T cells of intra- and extrathymic origin.
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View SamplesDuring development, thymocytes bearing a moderately self-reactive T cell receptor (TCR) can be selected to become regulatory T (Treg) cells. Several observations suggest that also in the periphery mature Treg cells continuously receive self-reactive TCR signals. However, the importance of this inherent autoreactivity for Treg cell biology remains poorly defined.
Continuous T cell receptor signals maintain a functional regulatory T cell pool.
Specimen part
View SamplesWe investigated at which stage of maturation commitment to a stable Foxp3-expressing phenotype takes place. We assessed stability of Foxp3 expression in thymic Foxp3+ Treg subsets of different maturity, defined by CD24 expression. Next we compared gene expression profiles of Foxp3+ Treg subsets (+) of different maturity (24lo, 24int, 24hi) and could identify a set of genes that were specifically up or downregulated in Foxp3+ Tregs, but not in Foxp3- conventional T cells, in a maturation-dependent manner.
Active demethylation of the Foxp3 locus leads to the generation of stable regulatory T cells within the thymus.
Specimen part
View SamplesMany symptoms associated with allergic asthma result from the sequelae of type 2 inflammation. Interleukin (IL)-25 promotes type 2 inflammatory responses, and T2M cells represent an IL-4 and IL-13 producing granulocytic IL-25 responsive population.
Interleukin-25 induces type 2 cytokine production in a steroid-resistant interleukin-17RB+ myeloid population that exacerbates asthmatic pathology.
Specimen part
View SamplesWe sought to determine the impact of chorioamnionitis exposure on term neonatal monocyte transcription. RNA-seq was performed on term healthy and chorioamnionitis-exposed umbilical cord blood purified CD14+ monocytes under unstimulated and LPS stimulated conditions. Overall design: RNA-seq on 11 samples with 2-3 replicates per exposure/stimulation group (each replicate contains 3 pooled samples)
Chorioamnionitis exposure remodels the unique histone modification landscape of neonatal monocytes and alters the expression of immune pathway genes.
Specimen part, Treatment, Subject
View SamplesAnalysis of interferon-stimulated genes (ISGs) in various primary cells and immortalized cell lines, following type 1 interferon (IFN) treatment. Some cell types become resistant to HIV-1 infection following type 1 interferon treatment (such as macrophages, THP-1, PMA-THP-1, U87-MG cells and to a lesser extent, primary CD4+ T cells) while others either become only partially resistant (e.g., HT1080, PMA-U937) or remain permissive (e.g., CEM, CEM-SS, Jurkat T cell lines and U937); for more information see (Goujon and Malim, Journal of Virology 2010) and (Goujon and Schaller et al., Retrovirology 2013). We hypothesized that the anti-HIV-1 ISGs are differentially induced and expressed in restrictive cells compared to permissive cells and performed a whole genome analysis following type 1 IFN treatment in cell types exhibiting different HIV-1 resistance phenotypes.
Human MX2 is an interferon-induced post-entry inhibitor of HIV-1 infection.
Cell line, Treatment, Subject
View SamplesWe find that sub-set of cytokin repsonse genes are not regulated at WT levels in the bpc1,2,3,4,6 mutant. Overall design: Whole ten-day-old seedlings of WT and the bpc1,2,3,4,6 mutant were treated with synthetic cytokinin (benzyladenine) or a vehicle control (NaOH) for 1 hour and root tissue was isolated.
Role of BASIC PENTACYSTEINE transcription factors in a subset of cytokinin signaling responses.
Specimen part, Treatment, Subject
View SamplesAim of this experiment was to look at the gene expression differences in the benzyladenine-treated and untreated Arabidopsis seedlings grown in light
Identification of cytokinin-responsive genes using microarray meta-analysis and RNA-Seq in Arabidopsis.
Age, Specimen part, Compound
View SamplesAim was to look at the gene profile changes in 10 days old Arabidopsis seedlings grown in light and treated with either Zeatin or BA and compared to non-treatment
Identification of cytokinin-responsive genes using microarray meta-analysis and RNA-Seq in Arabidopsis.
Age, Compound
View SamplesEffect of the cytokinin BA on wt and arr1,10,12 mutant seedlings
Type B response regulators of Arabidopsis play key roles in cytokinin signaling and plant development.
Age, Specimen part
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