Project description:This is to compare the gene expression profile of Th1 and Th17 cells. Experiment Overall Design: Two replicates (rep1, rep2) in two groups (Th1, Th17).
Project description:In this study, we examined differential gene expression in naïve human CD4+ T cells, as well as in effector Th1, Th17-negative and Th17-enriched CD4- T cell subsets. We observed a marked enrichment for increased gene expression in effector CD4+ T cells compared to naive CD4+ among immune-mediated disease oci genes. Within effector T cells, expression of disease-associated genes was increased in Th17-enriched compared to Th17-negative cells. We used microarray to examine the gene expresssion profile and level of human naïve, Th1 and effector T cell subsets. Human PBMCs were isolated and sorted to naïve, CD161-CCR6- and CD161+CCR6+ memory T cells. Naïve T cells were differentiatied to Th1 cells, and CD161-CCR6- and CD161+CCR6+ memory T cells were in vitro expanded for Th17-negative and Th17-enriched effector T cells. The gene profile was compared among naive, Th1, Th17-negative, and Th17-enriched cell subsets.
Project description:The death receptor Fas removes activated lymphocytes through apoptosis. Previous transcriptional profiling predicted that Fas positively regulates interleukin (IL)-17-producing T helper (Th17) cells. We here demonstrate that Fas promoted the generation and stability of Th17 cells and prevented their differentiation into Th1 cells. Mice with T cell- and Th17 cell-specific deletion of Fas were protected from induced autoimmunity and Th17 cell differentiation and stability was impaired. Fas deficient Th17 cells instead developed a Th1 cell-like transcriptional profile, which we predicted by a new algorithm to depend on STAT1. Experimentally, Fas indeed bound and sequestered STAT1 and Fas deficiency enhanced IL-6 induced STAT1 activation and nuclear translocation, whereas Fas-STAT1 double-deficiency reversed the transcriptional changes induced by Fas deficiency. Thus, our computational and experimental approach identified Fas as a regulator of the Th17-to-Th1 cell balance by controlling the availability of the opposing STAT1 and STAT3 proteins with direct impact on autoimmunity.
Project description:The comparison of Th1 vs. Th17 cell expression profile has been plagued by 1) rarely use of physiologically relevant antigen-driven T helper cell differentiation; and 2) cell lineage tracking system to enrich highly pure Th subsets. We began our attempt to produce large numbers of antigen-specific T helper subsets for expression profiling, when Foxp3GFP knockin mice were first made by our laboratory in 2005. We crossed this line with syngeneic TEa TCR transgenic mice in C57BL/6 background, and use FACS to sort optimally stimulated, highly pure GFP(Foxp3)-negative populations for Th1 vs. Th17 expression profile comparison.
Project description:T cells from the spleen of a mixed-gender pool of four double-transgenic 2D2 (TCRMOG) x IgHMOG mice (OSE) mice, which spontaneously develop experimental autoimmune encephalomyelitis (EAE), were used to derive TH1- and TH17-polarized cells, as described in https://doi.org/10.1371/journal.pone.0015531. Here, expression was compared, first, between TH1 and naïve TH0 and, second, between TH17 and naïve TH0 cells.
Project description:In this study, we examined differential gene expression in naïve human CD4+ T cells, as well as in effector Th1, Th17-negative and Th17-enriched CD4- T cell subsets. We observed a marked enrichment for increased gene expression in effector CD4+ T cells compared to naive CD4+ among immune-mediated disease oci genes. Within effector T cells, expression of disease-associated genes was increased in Th17-enriched compared to Th17-negative cells. We used microarray to examine the gene expresssion profile and level of human naïve, Th1 and effector T cell subsets.
Project description:Transcriptional analysis of human T cells differentiated in 4 T Helper context ( Th0, Th1, Th2 and Th17) in the presence or not of Interferon alpha We analyzed the transcriptomic profiles of 4 human naives T cells diferentiated in Th0, Th1, Th2 and Th17 in the presence or not of Interferon Alpha. Microarray analyses were performed in 2 time points : 1/ after Day 5 of polarization (= Day5); 2/ after Day 5+ four hours of re-stimulation (=Day 5+ 4H restim) in 3 different donors.