Project description:Multiple common variants for celiac disease influencing immune gene expression The goal of this study was to study the effect of genetic variation on gene expression of untouched primary leucocytes. We obtained peripheral blood RNA from unrelated Dutch individuals using PAXgene tubes. We performed a second-generation genome wide association study of 4,533 celiac disease cases and 10,750 controls. We genotyped 113 selected SNPs with PGWAS<10-4, and 18 SNPs from 14 known loci, in a further 4,918 cases and 5,684 controls. Variants from 13 new regions reached genome wide significance (Pcombined<5x10-8), most contain immune function genes (BACH2, CCR4, CD80, CIITA/SOCS1/CLEC16A, ICOSLG, ZMIZ1) with ETS1, RUNX3, THEMIS and TNFRSF14 playing key roles in thymic T cell selection. A further 13 regions had suggestive association evidence. In an expression quantitative trait meta-analysis of 1,469 whole blood samples, 20 of 38 (52.6%) tested loci had celiac risk variants correlated (P<0.0028, FDR 5%) with cis gene expression. *** Due to privacy concerns, the SNP data is not available with unrestricted access. Individuals wishing to obtain this data for research purposes may request access directly from the submitter (contact info below). ***
Project description:Multiple common variants for celiac disease influencing immune gene expression The goal of this study was to study the effect of genetic variation on gene expression of untouched primary leucocytes. We obtained peripheral blood RNA from unrelated Dutch and UK individuals using PAXgene tubes. We performed a second-generation genome wide association study of 4,533 celiac disease cases and 10,750 controls. We genotyped 113 selected SNPs with PGWAS<10-4, and 18 SNPs from 14 known loci, in a further 4,918 cases and 5,684 controls. Variants from 13 new regions reached genome wide significance (Pcombined<5x10-8), most contain immune function genes (BACH2, CCR4, CD80, CIITA/SOCS1/CLEC16A, ICOSLG, ZMIZ1) with ETS1, RUNX3, THEMIS and TNFRSF14 playing key roles in thymic T cell selection. A further 13 regions had suggestive association evidence. In an expression quantitative trait meta-analysis of 1,469 whole blood samples, 20 of 38 (52.6%) tested loci had celiac risk variants correlated (P<0.0028, FDR 5%) with cis gene expression. *** Due to privacy concerns, the SNP data is not available with unrestricted access. Individuals wishing to obtain this data for research purposes may request access directly from the submitter (contact info below). ***
Project description:Aim: To compare the overall transcriptional profile in healthy controls and celiac disease patients. This dataset, was used to evaluate if our in vitro model (intestinal intraepithelial lymphocytes, desccribed in doi:10.1016/j.jaut.2020.10242 ) is representative of the transcriptional profile in the intestine under healthy or inflammatory conditions. Samples: Upper colonoscopy biopsies from 5 control and 11 celiac disease patients were taken, total RNA was extracted and RNA-sequencing was performed (without replicates)
Project description:This study sought to identify proteins derived from dietary wheat, rye, and barley in human urine samples. The urinary peptidomes of celiac disease patients and healthy controls were compared.
Project description:Based on the findings of increased IEL in duodenal biopsies in CVID, an overlap with celiac disease has been suggested. In the present study, increased IEL, in particular in the pars descendens of the duodenum, was one of the most frequent histopathological finding. We therefore examined the gene expression profile in pars descendens of duodenum in CVID patients with increased IEL (n=13, IEL mean 34 [range 22-56] IEL/100 EC), CVID with normal levels of IEL (n=7), celiac disease (n=10, Marsh grade 3a or above) and healthy controls (n=17) by gene expression microarray GI histopathological findings in 53 CVID patients that underwent upper and lower endoscopic examination were addressed. For the microarray analysis 20 CVID (7 CVID_normal and 13 CVID with incresed IEL), 10 patients with celiac diseases and 17 healthy controls were included.
Project description:We collected 19 duodenal biopsies of children and adults with celiac disease and compared the expression of 38 selected genes between each other and with the observed in 13 non-celiac disease controls matched by age. qPCR gene expression profiling. Intestinal samples from children and adults with active celiac disease patients and controls were analysed.
Project description:Background and aims: Celiac disease is provoked by gluten exposure, but the resultant pathogenic process in the duodenum is not well understood. We aimed to define the core celiac transcriptomic signature and pathologic pathways in pre-treatment diagnostic duodenum biopsies. Methods: We use mRNAseq to define pre-treatment diagnostic duodenum gene expression in 54 pediatric celiac patients and non-celiac controls, and we validate our key findings in an independent cohort of 40 participants. We further define similar and divergent genes and pathways in 177 Crohn disease patients and controls. Results: We observe a marked suppression of mature epithelial metabolic functions in celiac patients, overlapping substantially with the Crohn signature. A marked adaptive immune response was noted for the up-regulated signature including interferon response, alpha-beta, and gamma-delta T-cells that overlapped to some extant with the Crohn signature. However, we identified a celiac specific signature linked to increased cell proliferation, nuclear division, and cell cycle activity that was localized primarily to the epithelia as noted by CCNB1 and Ki67 staining. Lastly, we demonstrate the utility of the transcriptomic date to correctly classify disease or healthy states in the discovery and validation cohorts. Conclusion: Our data provide insights into celiac pathogenesis and can stimulate new approaches to address this highly prevalent condition.