APCmin/+ mice develop spontaneous gastrointestinal polyposis due to a dominantly inhereited germline loss-of-function mutation in the tumor suppressor adenomatous polyposis coli (APC). Changes in intestinal immune activity have been documented to occur prior to the development of fulminate polyposis. Such changes are thought to contribute to disease development.
Oral interleukin-10 alleviates polyposis via neutralization of pathogenic T-regulatory cells.
Age, Specimen part
View SamplesComparison of gene expression between T regulatory and T effector cells isolated from the pancreatic lesion of 3-4 wk old BDC2.5 tg NOD mice
Where CD4+CD25+ T reg cells impinge on autoimmune diabetes.
Age, Specimen part
View SamplesCo-stimulatory molecules of the CD28 family on T lymphocytes integrate cues from innate immune system sensors, and modulate activation responses in conventional CD4+ T cells (Tconv) and their FoxP3+ regulatory counterparts (Treg). To better understand how costimulatory and co-inhibitory signals might be integrated, we profiled the changes in gene expression elicited in the hours and days after engagement of Treg and Tconv by anti-CD3 and either anti-CD28, -CTLA4, -ICOS, -PD1, -BTLA or -CD80.
Convergent and divergent effects of costimulatory molecules in conventional and regulatory CD4+ T cells.
Sex, Age, Specimen part
View SamplesWe report transcriptional characterization of skeletal muscle macrophage subsets in normal and injured muscle after intramuscular injection with cardiotoxin. We profiled transcriptional differences in macrophage subsets from mice depleted of Treg cells using Foxp3-DTR mice. We uncovered an IFN-g-centered regulatory loop, in which Treg cells inhibit NK and T cells to control macrophage accumulation and phenotype during muscle regeneration.
T<sub>reg</sub> cells limit IFN-γ production to control macrophage accrual and phenotype during skeletal muscle regeneration.
Sex, Age, Specimen part
View SamplesThis study was performed to understand what controls the aggressivity of the pancreatic infiltrate during type-I diabetes development. We used the BDC2.5 transgenic mouse model. Samples were obtained at the age of onset of insultis. Depending on their genetic background, mice transgenic for the BDC2.5 T cell receptor present very different forms of insulitis. The NOD genetic background leads to a benign insulitis whereas the C57Bl/6-H2g7/g7 leads to an aggressive insulitis. We first studied how antigen-specific T cells are affected by these differences by obtaining the transcriptional profiles of BDC2.5 T cells from pancreas and pancreatic lymph nodes. We also compared the gene expression profiles of the entire leukocyte population present in the pancreatic lesion.
Natural killer cells distinguish innocuous and destructive forms of pancreatic islet autoimmunity.
Age, Specimen part
View SamplesThree innate (B1-B, NKT, CD8aaT cells) and adaptive (B2-B, CD4T, CD8abT cells) cell-types were sorted by FACS. Three biological replicates for NKT, CD4T, CD8aaT, CD8abT cells and two biological replicates for B1 and B2 cells were generated and the expression profiles were determined using Affymetrix Mu74Av2 chip. Comparisons between the sample groups allow the identification of genes differentially expressed between the innate and adaptive cell-types.
A shared gene-expression signature in innate-like lymphocytes.
No sample metadata fields
View SamplesThe aim of this study was to determine the effect of transgenic Aire expression on the transcriptional profile of a tissue that normally does not express Aire: pancreatic islets. The transcriptional profile of transgenic RIP-Aire27 islets was compared to non-transgenic littermate islets as well as to archival NOD thymic medullary epithelial cells (MEC) data. All data were from non-obese diabetic (NOD) mice
Transcriptional impact of Aire varies with cell type.
No sample metadata fields
View SamplesFour independent chip hybridization with RNAs from four independent RTOC cultures.
Self-reactivity in thymic double-positive cells commits cells to a CD8 alpha alpha lineage with characteristics of innate immune cells.
No sample metadata fields
View SamplesThe first T cells to arrive in the liver were mostly T regulatory (Treg) cells and metabolically active, highly proliferative T conventional (Tconv) cells. The Tconv cells had unusually high expression of PD-1 and the IL-33 receptor, ST2. As these PD-1+ Tconv cells accumulated in the tissue, they gradually lost their expression of ST2, ceased to proliferate and acquired an anergic phenotype. Overall design: Gene expression profiles of flow cytometry sorted DAPI negative CD45 positive TCRb positive CD4 positive Foxp3 negative cells from liver of 5- and 10-day-old B6.Aire-KO mice
T cell anergy in perinatal mice is promoted by T reg cells and prevented by IL-33.
Age, Specimen part, Cell line, Subject
View SamplesThe CD4+Foxp3+ regulatory T cells play an essential role in maintaining tolerance via their suppressive function on conventional T cells. The intracellular signaling pathways that regulate Foxp3 expression are largely unknown. In this study we describe a novel inhibitory role for AKT in regulating de novo induction of Foxp3 both in vivo and in vitro. A constitutively active allele of AKT significantly diminished TGF- induced Foxp3 induction via a rapamycin-sensitive pathway, establishing a role for the AKT-mTOR axis in Treg cells. Moreover, the observed impairment in Foxp3 induction was paralleled by a selective downmodulation of the imparted Treg transcriptional signature highlighting the importance of the balance of intracellular signals in Treg differentiation . Our results provide a basis for further elucidation of molecular mechanisms that regulate Foxp3 induction and identify AKT as an important negative regulator of this process.
The AKT-mTOR axis regulates de novo differentiation of CD4+Foxp3+ cells.
Specimen part
View Samples