Homo sapiens
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: E-GEOD-14580E-GEOD-12251
PROVIDER: PRJNA111695 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We used microarrays to identify mucosal gene signatures predictive of response to infliximab (IFX) in patients with inflammatory bowel disease (IBD) and to gain more insight into the pathogenesis of IBD. Keywords: drug response and treatment effect Mucosal biopsies were obtained at endoscopy in actively inflamed mucosa from 61 IBD patients (24 ulcerative colitis (UC), 19 Crohnâs colitis (CDc) and 18 Crohnâs ileitis (CDi)), refractory to corticosteroids and/or immunosuppression, before and 4-6 weeks after (except for 1 CDc patient) their first infliximab infusion and in normal mucosa from 12 control patients (6 colon and 6 ileum). The patients were classified for response to infliximab based on endoscopic and histologic findings at 4-6 weeks after first infliximab treatment. Total RNA was isolated from intestinal mucosal biopsies, labelled and hybridized to Affymetrix Human Genome U133 Plus 2.0 Arrays.
2009-11-02 | E-GEOD-16879 | biostudies-arrayexpress
Project description:Mucosal gene signatures to predict response to infliximab in patients with ulcerative colitis
2015-07-27 | E-GEOD-14580 | ExpressionAtlas
Project description:Infliximab, an anti-TNFa monoclonal antibody, is an effective treatment for ulcerative colitis (UC) inducing over 60% of patients to respond to treatment. Consequently, about 40% of patients do not respond. This study analyzed mucosal gene expression from patients enrolled in ACT1 to provide a predictive response signature for infliximab treatment. Keywords: predictive response signature
2009-08-25 | GSE12251 | GEO
Project description:Infliximab, an anti-TNF-alpha monoclonal antibody, is an effective treatment for ulcerative colitis (UC) with over 60% of patients responding to treatment and up to 30% reaching remission. The mechanism of resistance to anti-TNF-alpha is unknown. This study used colonic mucosal gene expression to provide a predictive response signature for infliximab treatment in UC. Keywords: drug response Twenty-four patients with active UC, refractory to corticosteroids and/or immunosuppression, underwent colonoscopy with biopsies from diseased colon within a week prior to the first intravenous infusion of 5 mg infliximab per kg body weight. Response to infliximab was defined as endoscopic and histologic healing at 4-6 weeks after first infliximab treatment. Six control patients with normal colonoscopy were included. Total RNA was isolated from colonic mucosal biopsies, labelled and hybridized to Affymetrix Human Genome U133 Plus 2.0 Arrays.
2010-01-06 | E-GEOD-14580 | biostudies-arrayexpress
Project description:Infliximab, an anti-TNF-alpha monoclonal antibody, is an effective treatment for ulcerative colitis (UC) with over 60% of patients responding to treatment and up to 30% reaching remission. The mechanism of resistance to anti-TNF-alpha is unknown. This study used colonic mucosal gene expression to provide a predictive response signature for infliximab treatment in UC. Keywords: drug response
2010-01-07 | GSE14580 | GEO
Project description:Infliximab, an anti-TNFa monoclonal antibody, is an effective treatment for ulcerative colitis (UC) inducing over 60% of patients to respond to treatment. Consequently, about 40% of patients do not respond. This study analyzed mucosal gene expression from patients enrolled in ACT1 to provide a predictive response signature for infliximab treatment. Experiment Overall Design: Twenty-two patients underwent colonoscopy with biopsy before infliximab treatment. Response to infliximab was defined as endoscopic and histologic healing at week 8 (P2, 5, 9, 10, 14, 15, 16, 17, 24, 27, 36, and 45 as responders; P3, 12, 13, 19, 28, 29, 32, 33, 34, and 47 as non-responders). Messenger RNA was isolated from pre-infliximab biopsies, labeled and hybridized to Affymetrix HGU133Plus_2.0 Array. The predictive response signature was verified by an independent data set.
2009-09-05 | E-GEOD-12251 | biostudies-arrayexpress
Project description:Expression data was used to evaluate changes to the transcriptional signatures across the healthy and inflamed colon. A comparison between healthy controls and active ulcerative colitis signatures was also made. Mucosal biopsy specimens were harvested at four anatomical locations within the colon from healthy volunteers and patients with active ulcerative colitis. specimens were fixed in RNA later for 24 hours at room temperature and stored at -80C for a further 24 hours prior to RNA extraction and microarray analysis.
2015-01-21 | E-GEOD-65114 | biostudies-arrayexpress
Project description:A Predictive Response Signature to Infliximab Treatment in Ulcerative Colitis
| PRJNA113623 | ENA
Project description:Background & Aims. As a T cell-mediated disease of the colonic epithelium, ulcerative colitis (UC) is likely to share pathogenic elements with other T cell-mediated inflammatory diseases. Recently we showed T cell-mediated rejection of kidney and heart transplants share large scale molecular changes. We hypothesized that UC would manifest a similar disturbance, and that these features would correlate with response to infliximab. Results. UC biopsies manifested coordinate transcript changes resembling rejecting transplants, with T cell, IFNG-induced, macrophage, and injury transcripts increasing while parenchymal transcripts decreased. The disturbance expressed as principal component 1 correlated with conventional assessments e.g. Mayo scores, serum albumin, and lymphoplasmacytic infiltrate. When assessed in published microarray studies, the disturbance predicted response to infliximab: patients with intense disturbance did not achieve clinical response, although quantitative improvement was usually seen even in non-responders. Similar changes were seen in CrohnM-bM-^@M-^Ys colitis (CDc). Conclusions. The molecular phenotype of UC manifests a large scale coordinate disturbance reflecting changes in inflammatory cells and parenchymal elements that correlates with conventional features and predicts response to infliximab. We studied 56 colon biopsies from patients with colitis, including 43 with UC, characterizing the clinical and histological features, and defined the mRNA phenotype with Affymetrix expression microarrays. We measured the expression of previously defined pathogenesis-based transcript sets representing effector T cells, macrophages, IFNG effects, and parenchymal injury response and dedifferentiation. We also studied 48 microarray files from human colon biopsies from the Gene Expression Omnibus database, classified by response to infliximab therapy to look for molecular changes that predict unresponsiveness.
2014-12-22 | E-GEOD-51785 | biostudies-arrayexpress
Project description:Pre- and post-hyperbaric oxygen sequencing of mucosal biopsies of ulcerative colitis patients to understand host response to hyperoxia
2025-02-19 | GSE152229 | GEO