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Chromatin accessibility profile of Tfh cells during intestinal helminth infection

ABSTRACT: The goal of this study was to define the regulation of Tfh cell response during intestinal helminth infection. Using the helminth Trichuris muris, we performed ATAC-seq analysis on Tfh cells that develop during acute vs chronic helminth infection. We found that the epigenetic profile of acute vs chronic induced Tfh cells are distinct by adopting Th2 and Th1 cell phenotypes, respectively. For example, Th2-associated genes such as the Il4 locus was more accessible in acute-induced Tfh cells (and vice versa for Th1-associated genes in chronic-induced Tfh cells).

ORGANISM(S): Mus musculus

PROVIDER: GSE186062 | GEO | 2021/10/20

REPOSITORIES: GEO

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Transcriptomic profile of Tfh cells during intestinal helminth infection

Project description:The goal of this study was to define the regulation of Tfh cell response during intestinal helminth infection. Using the helminth Trichuris muris, we performed RNA-seq analysis on Tfh cells that develop during acute vs chronic helminth infection. We found that the transcriptomic profile of acute vs chronic induced Tfh cells are distinct and they express Th2/Th1-associated genes, respectively.

2021-10-20 | GSE185992 | GEO

Gene expression profiling of mouse chronic intestinal inflammation

Project description:Trichuris muris (T. muris) induces chronic colitis in susceptible mouse strains with clinical, histological, and immunological homology to human Crohn's disease. Gene expression profiling was performed on colon tissue of resistant (BALB/c) and susceptible (AKR) mice following T. muris infection.

2013-05-13 | E-MEXP-3098 | biostudies-arrayexpress

Characterization of ST2+ and ST2- mTh cells in helminth infection

Project description:CD4+T cells are differentiated into Th1, Th2, Th17 and Treg cells after Antigen presentation by other cell types such as dendritic cells, macrophages and B cells in Lymph nodes. Those differentiated CD4+T cells are subdivided into cell subsets by their producing cytokines and surface markers. We recently identified that ST2 expressing Th2 cells highly produced IL-5 comparing to ST2- Th2 cells in helminth infection. In this study, we investigated the RNAseq analysis to characterize these Th2 cells.

2018-09-20 | GSE120173 | GEO

Functional characterization of helminth-associated Clostridiales reveals covariates of Treg differentiation

Project description:Background: Parasitic helminths influence the composition of the gut microbiome. However, the microbiomes of individuals living in helminth-endemic regions are understudied. The Orang Asli, an indigenous population in Malaysia with high burdens of the helminth Trichuris trichiura, display microbiotas enriched in Clostridiales, an order of spore-forming obligate anaerobes with immunogenic properties. We previously isolated novel Clostridiales that were enriched in these individuals and found that a subset promoted the Trichuris life cycle. In this study, we aimed to further characterize the functional properties of these bacteria.Results: Clostridiales isolates were profiled for their ability to perform 57 enzymatic reactions and produce short chain fatty acids (SCFAs) and hydrogen sulfide, revealing that these bacteria were capable of a range of activities associated with metabolism and host response. Consistent with this finding, monocolonization of mice with individual isolates identified bacteria that were potent inducers of regulatory T cell (Treg) differentiation in the colon. Comparisons between variables revealed by these studies identified enzymatic properties correlated with Treg induction and Trichuris egg hatching.

2024-05-17 | GSE262316 | GEO

A role for BCL6 in maintaining CX3CR1+ CD4+ T cells during helminth infection

Project description:Distinct subsets of T lymphocytes express CX3CR1 under inflammatory conditions, but little is known about CX3CR1+ CD4+ T cells during Type 2 inflammation in helminth infections. Here, we used a fate-mapping mouse model to characterize CX3CR1+ CD4+ T cells during both acute Nippostrongylus brasiliensis and chronic Schistosoma mansoni helminth infections, revealing CX3CR1+ CD4+ T cells to be an activated tissue homing subset with varying capacity for cytokine production. Tracking these cells over time revealed that maintenance of CX3CR1 itself along with a TH2 phenotype conferred a survival advantage in the inflamed tissue. Single-cell RNA-sequencing analysis of fate-mapped CX3CR1+ CD4+ T cells from both the peripheral tissue and the spleen revealed a considerable level of diversity and identified a distinct population of BCL6+ TCF-1+ PD1+ CD4+ T cells in the spleen during helminth infections. Conditional deletion of BCL6 in CX3CR1+ cells result in fewer CX3CR1+ CD4+ during infection, indicating a role in sustaining CD4+ T cell responses to helminth infections. Overall, our studies revealed the behavior and heterogeneity of CX3CR1+ CD4+ T cells during Type 2 inflammation in helminth infections and identified BCL6 to be important in their maintenance

2023-08-12 | GSE239846 | GEO

Transcriptome of IL-13 treated small intestinal tissue in Nod2-/- mice

Project description:We previously found that mice deficient in the CD susceptibility gene Nod2 develop small intestinal abnormalities including impaired mucus production by goblet cells and susceptibility to injury, which were associated with interferon-gamma producing intraepithelial lymphocytes. These abnormalities were caused by a striking expansion of a common member of the microbiota, Bacteroides vulgatus. Remarkably, infection of Nod2-deficient mice with the helminth Trichuris muris led to a TH2 response that eliminated B. vulgatus colonization and intestinal abnormalities. In addition, treatment with recombinant IL13 (rIL13) or recombinant IL4 reduced B. vulgatus levels and eliminated goblet cell defects, suggesting that type 2 cytokines alone can reverse intestinal abnormalities in the absence of helminth infection. To determine the mechanism by which type 2 cytokines protected Nod2-/- mice from intestinal abnormalities, we performed RNA-seq on small intestinal tissue from WT, Nod2-/- and rIL13 treated Nod2-/- mice. We found that rIL13 treatment induced a wound healing response characterized by M2 macrophage activation genes. Hence, type 2 cytokines can reverse inflammatory imbalances in the composition of the gut microbiota that occurs in a genetically susceptible host.

2016-04-28 | GSE76504 | GEO

Functional and epigenetic studies reveal multistep differentiation and plasticity of in vitro and in vivo follicular T helper cells

Project description:Follicular T helper cells (Tfh) provide critical help to B cells for germinal center (GC) formation. Mutations affecting SLAM-associated Protein (SAP) prevent GC formation due to defective T-B cell interactions, yet effects on Tfh cell differentiation remain unclear. We describe the in vitro differentiation of functionally-competent “Tfh-like” cells that expressed Interleukin-21, Tfh markers, and Bcl6, and rescued GC formation in SAP-deficient hosts better than other T helper (Th) cells. SAP-deficient Tfh-like cells appeared virtually indistinguishable from wildtype, yet failed to support GCs in vivo. Interestingly, both Tfh-like and in vivo-derived Tfh cells could produce effector cytokines in response to polarizing conditions. Moreover, Th1, Th2 and Th17 cells could be reprogrammed to obtain Tfh characteristics. ChIP-Seq analyses revealed positive epigenetic markings on Tbx21, Gata3 and Rorc in Tfh-like and ex vivo Tfh cells, and Bcl6 in other Th cell populations, supporting the concept of plasticity between Tfh and other Th cells. Epigenetic modifications were evaluated in ChIP-Seq studies by profiling histone H3K4 and H3K27 trimethylation marks between Th1, Th2, Th17, Tfh-like, and CXCR5+PD-1+ sorted Tfh-like in vitro generated T helper cell populations and ex vivo derived Tfh cells.

2012-01-05 | E-GEOD-32864 | biostudies-arrayexpress

mRNA data from extracellular vesicles secreted by Trichuris muris

Project description:RNA-Seq analysis of the mRNA present in the extracellular vesicles secreted by the nematode Trichuris muris

2017-12-13 | GSE107986 | GEO

miRNA data from extracellular vesicles secreted by Trichuris muris

Project description:miRNA-Seq analysis of the miRNA present in the extracellular vesicles secreted by the nematode Trichuris muris

2017-12-13 | GSE107985 | GEO

Extracellular vesicles from Heligmosomoides bakeri and Trichuris muris contain distinct small RNAs

Project description:We report the small RNA content of extracellular vesicles (EVs) from adult parasite Trichuris muris and Heligmosomoides bakeri

2020-08-01 | GSE152591 | GEO

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