Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

RNA-seq of formalin-fixed, paraffin-embedded uninvolved terminal ileal tissue obtained from ileo-colic resection surgeries of Crohns disease and control patients

ABSTRACT: The interpretation of transcriptional profiling studies of intestinal tissue from Crohns disease patients and control patients can be confounded by differing proportions of cell subsets (e.g. immune cells) present in these samples. In this study, we aimed to control for cellular composition using standard, archival formalin-fixed, paraffin-embedded (FFPE) tissue specimens from Crohns patients (n=36) and controls (n=32) who underwent intestinal resection surgery. This approach allowed us to use the same tissue specimens for histological screening to select study samples with similar cellular composition and for RNA extraction for RNA-seq transcriptional profiling. We hypothesized that this approach would allow us to more clearly identify molecular signatures in ileal tissue that were associated with Crohns disease-associated pathological mechanisms.

INSTRUMENT(S): Illumina HiSeq 2000

ORGANISM(S): Homo sapiens

SUBMITTER: Kelli VanDussen

PROVIDER: E-MTAB-5783 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Microarray of formalin-fixed, paraffin-embedded uninvolved terminal ileal tissue obtained from ileo-colic resection surgeries of Crohn’s disease and control patients

Project description:The interpretation of transcriptional profiling studies of intestinal tissue from Crohn’s disease patients and control patients can be confounded by differing proportions of cell subsets (e.g. immune cells) present in these samples. In this study, we aimed to control for cellular composition using standard, archival formalin-fixed, paraffin-embedded (FFPE) tissue specimens from Crohn’s patients (n=36) and controls (n=32) who underwent intestinal resection surgery. This approach allowed us to use the same tissue specimens for histological screening to select study samples with similar cellular composition and for RNA extraction for RNA-seq transcriptional profiling. We hypothesized that this approach would allow us to more clearly identify molecular signatures in ileal tissue that were associated with Crohn’s disease-associated pathological mechanisms.

2018-05-22 | E-MTAB-5790 | biostudies-arrayexpress

Transcription profiling by array of Paneth cells and whole ileum from human Crohn's disease patient ileo-colic resection tissue

Project description:Transcriptional profiling of microscopically laser dissected Paneth cells and whole thickness ileum tissue from the proximal margins of archived formalin-fixed, paraffin-embedded ileo-colic resection samples.

2014-01-03 | E-MTAB-1281 | biostudies-arrayexpress

Agilent Microarray of formalin-fixed, paraffin-embedded mesenteric adipose tissue associated with different amount of fibrosis from ileocolonic resection specimens of Crohn’s disease patients

Project description:In Crohn’s disease (CD) pathology, we observed that: 1) a continuous process of fibrosis includes all the layers of the intestine as well as the surrounding mesenteric adipose tissue (MAT); 2) the amount of fibrosis in the MAT varies between samples even within a single case. To further investigate the molecular features of this fibrosis pattern, we did a paired study using formalin-fixed, paraffin-embedded blocks from ileocolonic resection specimens of seven CD patients. Specifically, one block contained ≥10% fibrosis amount while the other block contained <10% fibrosis amount within the MAT from the same case. MAT was selectively collected from serial histologic sections and total RNA was extracted for the Agilent Microarray analysis.

2021-07-16 | E-MTAB-8570 | biostudies-arrayexpress

Investigation of molecular features involved in clinical responses and survival in advanced endometrial carcinoma

Project description:Hormone therapy (HT) is an effective treatment for metastatic endometrial carcinoma (mEC), with limited toxicity and low cost. We focused on molecular analysis of mECs treated by HT and, for the first time to date, we compared genomic profiles of paired metastasis and primary ECs. The main objective was to identify predictive factors of response to HT as well as specific altered signalling pathways driving mEC biology. We evaluated gene alterations by array-based comparative genomic hybridization

2022-03-16 | E-MTAB-11552 | biostudies-arrayexpress

OSCC Illumina GoldenGate Methylation

Project description:This study aims to compare the DNA methylome across a large cohort of oral squamous cell carcinoma and matched normal samples. DNA from 44 OSCCs and paired normal mucosa were analysed using Illumina GoldenGate methylation array. This data was correlated with extracapsular spread (extracapsular spread), Human Papilloma Virus (HPV) status, recurrence and 5-year survival.

2013-08-02 | E-MTAB-1298 | biostudies-arrayexpress

Prospective high-throughput genome profiling by comparative genomic hybridization (CGH) in advanced cancers.

Project description:We conducted a prospective monocenter clinical trial called PERMED01 to evaluate the number patients with locally advanced or metastatic cancer for whom identification of molecular alterations in tumor samples could lead to the delivery of a targeted therapy. Patients accessible to tumor biopsy were prospectively enrolled at the Paoli-Calmettes Institute in the PERMED01 study (ClinicalTrials.gov, NCT02342158). Genomic profiling of frozen tissue was established by whole-genome array comparative genomic hybridization (aCGH)

2021-03-01 | E-MTAB-9998 | biostudies-arrayexpress

RNA profiling of non-small cell lung cancer

Project description:RNA sequencing of 25 patients with non-small cell lung cancer and their matched normal lung tissue

2020-03-04 | E-MTAB-6957 | biostudies-arrayexpress

Gene expression analysis of crypt base epithelial cells from WT and Nod2-/- mice

Project description:Nod2 has been extensively characterized as a bacterial sensor that induces an antimicrobial and inflammatory gene expression program. Therefore, it is unclear why Nod2 mutations that disrupt bacterial recognition are paradoxically among the highest risk factors for Crohn’s disease, which involves an exaggerated immune response directed at intestinal bacteria. Previous studies from our lab have shown that mice deficient in Atg16L1, another Crohns disease susceptibility gene, develop abnormalities in Paneth cells, specialized epithelial cells in the small intestine involved in antimicrobial responses. The goal of our study is to determine whether Nod2 deficiency leads to differences in the transcriptional profile of Paneth cells, ultimately leading to small intestinal inflammation. Small intestinal sections (ileum) of 8 week old WT and Nod2-/- mice were fixed in methacarn and embedded in paraffin. The Leica LMD6000 Laser Microdissection system was used to capture crypt base epithelial cells to enrich for Paneth cells. RNA was extracted from these cells, followed by cDNA synthesis and qPCR to confirm enrichment of Paneth cells using unique markers (a-defensins).

2014-07-01 | E-GEOD-58948 | biostudies-arrayexpress

Oncoscan SNP-array analysis of DNA from esophageal samples of patients with Barrett's esophagus before and after progression to esophageal dysplasia and adenocarcinoma

Project description:The goal of this experiment is to characterize the copy number changes in esophageal mucosa of patients with Barrett's esophagus (BE) who progress to esophageal dysplasia and adenocarcinoma (BE progressors), as compared to patients with BE who do not progress for at least two years after esophageal mucosal sampling (non-progressors with never dysplastic Barrett's esophagus - NvDBE - samples). We sampled esophageal mucosa from the following groups: 1) non-dysplastic intestinal metaplasia from 16 patients at least 1 year before progression to esophageal dysplasia or adenocarcinoma (PP-BE); 2) non-dysplastic intestinal metaplasia from 21 patients who did not progress to dysplasia or adenocarcinoma for at least 2 years of surveillance after the tested sample (NvDBE) 3) non-dysplastic intestinal metaplasia from 21 patients who had temporally concurrent but spatially separate intestinal metaplasia samples from the same procedure (C-BE). 4) 10 samples of esophageal dysplasia or adenocarcinoma from patients in group 1 and 3. Samples were obtained by endoscopic biopsy, endomucosal resection or surgical resection, processed for clinical purposes by routine histopathologic methods, including formalin fixation and paraffin embedding (FFPE). DNA was extracted from 5 micro tissue sections of FFPE blocks and DNA extracted using QIAamp DNA FFPE Tissue Kit (Qiagen, Germantown, MD). Samples were processed for identification of somatic copy number alterations using the OncoScan FFPE Assay or the OncoScan CNV Assay (Affymetrix, Santa Clara, CA) according to the manufacturer's protocols. After hybridization, the arrays were washed, stained using GeneChip Fluidics Station 450 (Affymetrix) and scanned using GeneChip Scanner 3000 7G (Affymetrix). The CEL files generated are deposited here.

2019-10-27 | E-MTAB-7396 | biostudies-arrayexpress

The NSL complex subunit KANSL2 regulates cell stemness and tumorigenesis in glioblastoma

Project description:The NSL (nonspecific lethal) complex proteins involved in acetyltransferase activity on histones play important role during the epigenetic and transcription regulation. The KANSL2/NSL2 is an integral component of NSL and expressed in embryonic cells. We engaged to characterize KANSL2 ( protein component subunit of the KAT-8 associated nonspecific lethal complex) functions, using glioblastoma, which contains heterogenous aggressive neoplastic stem-like cells involved in tumor resistance and recurrence.

2017-02-05 | E-MTAB-4455 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data