Project description:The aim of this study is to identify early pathogenic changes in ileal gene expression that precede the development of macroscopic disease in inflammatory bowel diseases (IBDs). We focused on two IBD phenotypes that were unlikely to overlap: 1) ileal Crohn’s disease (CD) patients undergoing initial ileocolic resection of diseased ileum; and 2) ulcerative colitis (UC) patients undergoing total colectomy. The Control patients were those patients without IBD undergoing initial right hemicolectomy or total colectomy. In order to identify early pathogenic changes in the human ileum in inflammatory bowel diseases, we analyzed 99 two-color whole human genome expression profiles (Agilent 4410A) of a test human ileal cRNA probe vs. a common reference human ileal RNA from a Control patient (N17). A minimum of four biopsies were taken from the macroscopically disease-unaffected proximal ileal margin of freshly resected specimens from 47 ileal Crohn's disease patients undergoing initial ileocolic resection, 27 ulcerative colitis patients undergoing total colectomy and 25 Control patients undergoing either right hemicolectomy or total colectomy. The test and common reference probes were synthesized using the Agilent Low Input Linear Amplification Kit. Hybridization was carried out in DNA hybridization chambers, washed and scanned on an Axon GenePix 4000B scanner. The preprocessing, filtering and normalization of the array data was carried out using the R package LIMMA.
Project description:We report whole mRNA gene expression and Percent Spliced In (PSI) estimates for rectal (n=59) and ileal (n=60) tissue samples of 33 patients with either Crohn's disease (n=19) or ulcerative colitis (n=14)
Project description:The aim of this study is to identify early pathogenic changes in ileal gene expression that precede the development of macroscopic disease in inflammatory bowel diseases (IBDs). We focused on two IBD phenotypes that were unlikely to overlap: 1) ileal Crohn’s disease (CD) patients undergoing initial ileocolic resection of diseased ileum; and 2) ulcerative colitis (UC) patients undergoing total colectomy. The Control patients were those patients without IBD undergoing initial right hemicolectomy or total colectomy.
Project description:Genome wide DNA methylation profiling of Crohn's disease, ulcerative colitis, and normal peripheral blood samples. The Illumina Infinium HumanMethylation450 BeadChip v1.1 was used to obtain DNA methylation profiles across 482,421 CpGs in peripheral blood samples. Samples came from 17 Crohn's disease affected, 11 ulcerative colitis affected, and 20 normal individuals. Within these samples were three twin sets discordant for Crohn's disease and three twin sets discordant for ulcerative colitis.
Project description:Genome wide DNA methylation profiling of Crohn's disease, ulcerative colitis, and normal peripheral blood samples. The Illumina Infinium HumanMethylation450 BeadChip v1.1 was used to obtain DNA methylation profiles across 482,421 CpGs in peripheral blood samples. Samples came from 17 Crohn's disease affected, 11 ulcerative colitis affected, and 20 normal individuals. Within these samples were three twin sets discordant for Crohn's disease and three twin sets discordant for ulcerative colitis. Bisulfite converted DNA from the 48 samples were hybridized to the Illumina Infinium HumanMethylation450 BeadChip v1.1
Project description:The series was designed to identify new genes involved in the pathophysiology of inflammatory bowel disease (Crohn's disease and ulcerative colitis). This series represents a group of 31 samples, subdivided into 3 groups: 1) Normal controls: 11 samples; 2) patients with Crohn's diseases: 10 samples; 3) patients with ulcerative colitis: 10 samples. Each sample originated from a different patient or normal control, in total n=31 individuals were examined. Keywords = Inflammatory bowel disease Keywords = Crohn's disease Keywords = ulcerative colitis Keywords = expression screening Keywords = expression profiling Keywords: other
Project description:Genome wide DNA methylation profiling of Crohn's disease, ulcerative colitis, and normal colon mucosa samples. The Illumina Infinium HumanMethylation450 BeadChip v1.1 was used to obtain DNA methylation profiles across 482,421 CpGs in colon mucosa samples. Samples came from 5 Crohn's disease affected, 5 ulcerative colitis affected, and 12 normal individuals. One ulcerative colitis sample was assayed before and after treatment with infliximab and mesalamine.
Project description:Genome wide DNA methylation profiling of Crohn's disease, ulcerative colitis, and normal colon mucosa samples. The Illumina Infinium HumanMethylation450 BeadChip v1.1 was used to obtain DNA methylation profiles across 482,421 CpGs in colon mucosa samples. Samples came from 10 Crohn's disease affected, 4 ulcerative colitis affected, and 10 normal individuals. One ulcerative colitis sample was assayed before and after treatment with 6-mercaptopurine and mesalamine.
Project description:We employed contemporary targeted autoimmune RNA sequencing (HTG molecular diagnostics, Autoimmune panel) to ileal tissue derived from 96 paediatric IBD, Crohn's disease, Ulcerative colitis patients and controls. Weighted-gene-co-expression-network-analysis (WGCNA) was performed and differentially expressed genes (DEGs) were determined. We integrated clinical data to determine co-expression modules associated with time to relapse.
Project description:Genome wide DNA methylation profiling of Crohn's disease, ulcerative colitis, and normal colon mucosa samples. The Illumina Infinium HumanMethylation450 BeadChip v1.1 was used to obtain DNA methylation profiles across 482,421 CpGs in colon mucosa samples. Samples came from 9 Crohn's disease affected, 5 ulcerative colitis affected, and 10 normal individuals. Bisulfite converted DNA from the 24 samples were hybridized to the Illumina Infinium HumanMethylation450 BeadChip v1.1
