RNA-sequencing of gluten-reactive and non-reactive T-cells from blood samples of treated CeD patients during a gluten-challenge
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PROVIDER: EGAS00001004988 | EGA |
REPOSITORIES: EGA
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Project description:Coeliac disease is a small intestinal disorder caused by an abarrent immune response towards dietary gluten due to activation of pro-inflammatory gluten specific CD4+ T cells. Histological evaluation and classification of gluten induced musosal changes is part of the diagnostic work up. of adults. The kinetics of mucosal recovery following commencesment of a gluten free diet (disease remission) and the degree of mucosal changes induced by gluten reintroduction (gluten challenge) varies between patients. Also, patients classified with similar clinical and histological disease remission, can develop different degree of mucosal damage following the same gluten challenge regime. This variation poses a challenge for the interpretation of gluten induced mucosal changes both in a diagnostic and clinical trial settings. In this study, we have analysed material from small intestinal biopsies collected from 19 treated coeliac disease patients before and after completion of a 14-day oral gluten challenge. These patients are part of a previoslpreviouslyu described study where all patients were in clinical and mucosal remission at baseline but only some patients developed histological changes in the mucosa in response to gluten. We have performed shotgun LC-MSMS analysis and label-free quantification of total gut tissue and from laser capture microdissected epithelial cell layer samples. We found that differences in tissue proteome expression could separate patients as responders and non-responders to the gluten challenge. Patients whoich responded strongly to gluten , had signs of gut inflammation already at baseline, supported by presence of low-level blood inflammatory parameters and a slight increase in numbers of gluten-specific CD4+ T cells at baseline. Our proteomics analysis demonstrated baseline differences in gut tissue state between patients that were not evident from routine clinical and histological evaluation. These baseline differences likely explains why some patients respond more strongly to gluten challenge than others.
2021-03-03 | PXD018977 | Pride
Project description:Coeliac disease (CeD) is a complex, polygenic inflammatory enteropathy with autoimmune features caused by exposure to dietary gluten that occurs in a subset of genetically susceptible HLA-DQ8 and HLA-DQ2 individuals. Attempts to develop a pathophysiologically relevant animal model that develops villous atrophy (VA) have failed. The need to develop non-dietary treatments for this common disorder is now widely recognized, but it is hampered by the lack of a preclinical model. Furthermore, while human studies have led to major advances in our understanding of CeD pathogenesis, direct demonstration of the respective roles of disease-predisposing HLA molecules, and adaptive and innate immunity in the development of tissue damage is missing. To address these unmet needs, we engineered a mouse model that reproduces the dual overexpression of IL-15 in the gut epithelium and the lamina propria (Lp) characteristic of active CeD, expresses the predisposing HLA-DQ8 molecule, and develops VA upon gluten ingestion. We show that overexpression of IL-15 in both the epithelium and Lp is required for development of VA, demonstrating the location-dependent central role of IL-15 in CeD pathogenesis. Furthermore, our study reveals the critical role played by both CD4+ and cytotoxic CD8+ T cells in VA development. Finally, it establishes that HLA-DQ8 is central for tissue destruction, but dispensable for loss of oral tolerance to gluten. This mouse model, by reflecting the complex interplay between gluten, genetics and the IL-15-driven tissue inflammation found in CeD, represents a powerful preclinical model to test new therapeutics and study disease pathogenesis.
2019-07-26 | GSE134900 | GEO
Project description:Gluten reactive T-cells from blood samples from patients undergoing a 3 day gluten challenge. Samples were collected on day 6.
Both gluten reactive and non-gluten reactive T-cells were sequenced.
| EGAD00001006899 | EGA
Project description:Dietary gluten proteins (prolamins) from wheat, rye, and barley are the driving forces behind celiac disease, an organ-specific autoimmune disorder that targets both the small intestine and organs outside the gut. In the small intestine, gluten induces inflammation and a typical morphological change of villous atrophy and crypt hyperplasia. Gut lesions improve and heal when gluten is excluded from the diet and the disease relapses when patients consume gluten. Oral immune tolerance towards gluten may be kept for years or decades before breaking tolerance in genetically susceptible individuals. Celiac disease provides a unique opportunity to study autoimmunity and the transition in immune cells as gluten breaks oral tolerance. Seventy-three celiac disease patients on a long-term gluten-free diet ingested a known amount of gluten daily for six weeks. A peripheral blood sample and intestinal biopsies were taken before and six weeks after initiating the gluten challenge. Biopsy results were reported on a continuous numeric scale that measured the villus height to crypt depth ratio to quantify gluten-induced gut mucosal injury. Pooled B and T cells were isolated from whole blood, and RNA was analyzed by DNA microarray looking for changes in peripheral B- and T-cell gene expression that correlated with changes in villus height to crypt depth, as patients maintained or broke oral tolerance in the face of a gluten challenge.
2017-01-27 | GSE87629 | GEO
Project description:Celiac disease (CD) is an autoimmune disease in which intestinal inflammation is induced by dietary gluten. The means through which gluten-specific CD4+T cell activation culminates in intraepithelial T cell (T-IEL)–mediated intestinal damage remain unclear. Here, we performed multiplexed single-cell analysis of intestinal and gluten-induced peripheral blood T cells from patients in different CD states and healthy controls. Untreated, active, and potential CD were associated with an enrichment of activated intestinal T cell populations, including CD4+follicular T helper (TFH) cells, regulatory T cells (Tregs), and natural CD8+αβ and γδ T-IELs. Natural CD8+αβ and γδ T-IELs expressing activating natural killer cell receptors (NKRs) exhibited a distinct TCR repertoire in CD and persisted in patients on a gluten-free diet without intestinal inflammation. Our data further show that NKR-expressing cytotoxic cells, which appear to mediate intestinal damage in CD, arise from a distinct NKR-expressing memory population of T-IELs. After gluten ingestion, both αβ and γδ T cell clones from this memory population of T-IELs circulated systemically along with gluten-specific CD4+T cells and assumed a cytotoxic and activating NKR-expressing phenotype. Collectively, these findings suggest that cytotoxic T cells in CD are rapidly mobilized in parallel with gluten-specific CD4+T cells after gluten ingestion.
2024-01-13 | GSE252762 | GEO
Project description:Celiac disease (CeD) is an intestinal immune-mediated disorder caused by gluten ingestion in genetically predisposed subjects. CeD is characterized by villous atrophy, altered intestinal permeability, crypt hyperplasia and innate and adaptive immune response. This study aimed to develop and validate the use of intestinal organoids from celiac patients to study CeD. A repository of organoids from duodenum of non-celiac and celiac patients was generated and characterized accordingly to standard procedures. RNA-seq analysis was employed to study the global gene expression program of CeD (n=3) and non-CeD (n=3) organoids sets. While the three celiac derived organoids shared similar transcriptional signatures the NC samples set appeared more heterogeneous. We found 486 genes differentially expressed between the two groups. Of them, 299 genes were downregulated (FC<2; FDR<0.05) and 187 were upregulated in CeD (FC >2; FDR<0.05). We observed CeD organoids had significantly altered expression of genes associated with barrier function, innate immunity, and stem cell function.
2019-05-29 | GSE113492 | GEO
Project description:Gluten specific CD4 positive T cell upon anti CD3 and anti CD28 stimulation
2021-02-16 | GSE146441 | GEO
Project description:Total RNA-seq of intestinal gluten tetramer+ and tetramer- CD4+ T-cells from celiac disease patients, as well as intestinal CD4+ T-cells from healthy control individuals (paired-end fastq files).
| EGAD00001004146 | EGA
Project description:Celiac disease (CeD) is a food sensitivity characterized by a breakdown of oral tolerance to gluten proteins in genetically predisposed individuals, although the underlying mechanisms are incompletely understood. To evaluate a functional role of bacterial proteases in CeD, we colonized germ-free or clean SPF mice with P.aeruginosa PA14 or P.aeruginosa PA14 disrupted in lasB gene (elastase). We show gluten-independent, PAR-2 mediated upregulation of inflammatory pathways by LasB in C57BL/6 mice without villus blunting. In mice expressing CeD risk genes, P. aeruginosa elastase synergized with gluten to induce more severe inflammation that was associated with moderate villus blunting.
2019-02-01 | GSE125983 | GEO
Project description:Gluten-specific CD4+ T cells drive the pathogenesis of celiac disease and circulating gluten-specific T cells can be identified by staining with HLA-DQ:gluten tetramers. In this first single-cell RNA-seq study of tetramer-sorted T cells from untreated celiac disease patients blood, we found that gluten-specific T cells showed distinct transcriptomic profiles consistent with activated effector memory T cells that shared features with Th1 and follicular helper T cells. Compared to non-specific cells, gluten-specific T cells showed differential expression of several genes involved in T-cell receptor signaling, translational processes, apoptosis, fatty acid transport, and redox potentials. Many of the gluten-specific T cells studied shared T-cell receptor with each other, indicating that circulating gluten-specific T cells belong to a limited number of clones. Moreover, the transcriptional profiles of cells that shared the same clonal origin were transcriptionally more similar compared with between clonally unrelated gluten-specific cells.
| EGAS00001005517 | EGA