Project description:This SuperSeries is composed of the following subset Series: GSE37200: Gene expression profiling of Barrett’s esophageal tissues and esophageal adenocarcinoma specimens GSE37201: Gene expression profiling of esophageal adenocarcinoma Refer to individual Series
Project description:miR-223 is step-wise increasingly up-regulated in the normal esophagus - Barrett's esophagus -esophageal adenocarcinoma carcinoma sequence. In this study, we aimed to determine the function of miR-223 in esophageal adenocarcinoma carcinogenesis.
Project description:Barrett's esophagus is a metaplastic condition of the distal esophagus, characterized by the replacement of normal squamous epithelium by columnar epithelium. Patients with BE have an increased risk of developing esophageal adenocarcinoma. MicroRNAs have been implicated to be disease and tissue specific, however limited data of microRNA expression in the esophagus is available. Therefore we evaluated microRNA expression profiles of esophageal adenocarcinoma and compared these with Barrett's esophagus and normal squamous esophagus.
Project description:miR-223 is step-wise increasingly up-regulated in the normal esophagus - Barrett's esophagus -esophageal adenocarcinoma carcinoma sequence. In this study, we aimed to determine the function of miR-223 in esophageal adenocarcinoma carcinogenesis. miR-223 was transfected in OE33 cells using 10nM pre-miR hsa-miR-223 miRNA precursor (Ambion, Life Technologies, Grand Island, NY) and lipofectamin 2000 (OE33_223_1 and OE33_223_2). Mock control OE33 cells were transfected with a negative control pre-miR miRNA (OE33_NEG_1 and OE33_NEG_2). HumanHT-12 v4 Expression BeadChip arrays (Illumina, San Diego, CA) were used for microarray hybridizations to examine the global gene expression of two biological replicated experiments (four samples in total). The array targets more than 25,000 annotated genes with 47,323 unique probes derived from the National Center for Biotechnology Information (NCBI) Reference Sequence (RefSeq) Release 38 and UniGene (Build 199) databases.
Project description:Specimens were collected from esophageal adenocarcinoma patients undergoing esophagectomy for adenocarcinoma at the University of Michigan Health System between 1991 and 2004. Written consent was obtained from each patient according to the approval and guidelines of the University of Michigan institutional review board. Patients receiving treatment with chemotherapy and/or radiotherapy prior to surgery were excluded. Tissue samples were fresh-frozen in liquid nitrogen and stored at −80 °C until use. Cellularity of tumor samples were assured to be greater than 70% before sample RNA was isolated. RNA from 22 adenocarcinoma samples was extracted and processed for hybridization on Affymetrix Human Genome U133A 2.0 Array.
