The relative contribution of induced and natural Foxp3+ regulatory T cells (iTreg and nTreg cells, respectively) to the maintenance of tolerance is unknown. We examined their respective roles by in vivo adoptive transfer immunotherapy of newborn Foxp3-deficient BALB/c mice. Survival, weight gain, tissue infiltration, T cell activation, and the concentration of proinflammatory cytokines were used as outcome measurements. Treatment with iTreg cells alone was not successful. While effective in preventing death, treatment with nTreg cells alone was associated with chronic inflammation and autoimmunity. Outcomes markedly improved when conventional T (Tconv) cells were transferred together with the nTreg cells, where 10% of the peripheral Treg cell pool was derived by in-situ conversion. This enhancement depended upon the capacity of Tconv cells to express Foxp3.
A requisite role for induced regulatory T cells in tolerance based on expanding antigen receptor diversity.
Age, Specimen part
View SamplesA common method used both in vitro and in vivo, to identify Tregs in CD4+ T cells is through the characterization of surface marker CD25. Although CD25 expression is well correlated with regulatory activity in vitro, CD4+CD25+ T cells are not the only regulatory CD4+ T cells in vivo. Studies suggest that in many situations, CD4+CD25 T cells are as effective as CD4+CD25+ T cells in controlling T cell mediated disease. Therefore, CD25 is not a uniquely specific cell surface marker for the identification of Tregs. CD49f is an 6-integrin subunit which dimerizes with either the 1 or 4 subunit to form receptors for various laminin isoforms. We found that CD4+ T cells from NOD mice express CD49f, and old non-diabetic NOD mice had an increase of CD4+CD49f+ T cells in the spleen and peripheral lymph node when compared to both young and diabetic mice.
No associated publication
Sex, Specimen part
View SamplesCD8+ NKT cells are naturally occurring but rare T cells that express both T cell and natural killer (NK) cell markers. These cells may play key roles in establishing tolerance to self antigens; however, the mechanism of action and the molecular profiles of these cells are poorly characterized due to their extremely low frequencies. We developed a highly efficient in vitro conversion/expansion protocol for such cells and extensively characterized their functional and molecular phenotypes using a variety of genomic and immunological techniques.
No associated publication
No sample metadata fields
View SamplesGene expression profiles were compared between regulatory T cells (Treg) and Effector CD4+ T cells in healthy B6 mice and sick mice with scurfy mutation.
No associated publication
Sex, Specimen part
View SamplesInduced and activated regulatory CD4+ Foxp3+ cells compared
Connexin 43 signaling enhances the generation of Foxp3+ regulatory T cells.
Specimen part
View SamplesProtein and mRNA levels for several selenoproteins, such as glutathione peroxidase-1 (Gpx1), are down-regulated dramatically by selenium (Se) deficiency.
No associated publication
Specimen part, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
The cohesin-associated protein Wapal is required for proper Polycomb-mediated gene silencing.
Specimen part
View SamplesWe investigated in mouse models how enhanced coagulation activation due to a common disease polymorphism in coagulation factor V (fV Leiden Arg506Gln) modifies the host response to infection and inflammation
No associated publication
No sample metadata fields
View SamplesThe cohesin offloading protein Wapal also acts as a polycomb factor in flies. We examined its role in transcriptional role in murine embryonic stem cells (ESCs)
The cohesin-associated protein Wapal is required for proper Polycomb-mediated gene silencing.
Specimen part
View SamplesHypercholesterolemai is a major contributor to atherosclerosis development. To assess the effects of hypercholesterolemia on the transcriptional profiling in foam cells, mice were fed regular chow, or WD for 2 or 14 weeks prior to sacrifice.
No associated publication
Specimen part
View Samples