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| Item Type: | Article |
|---|---|
| Title: | Genome-wide analysis of barrett's adenocarcinoma. a first step towards identifying patients at risk and developing therapeutic paths |
| Creators Name: | Dai, Y., Wang, Q., Gonzalez Lopez, A., Anders, M., Malfertheiner, P., Vieth, M. and Kemmner, W. |
| Abstract: | BACKGROUND: Barrett's esophagus metaplasia is the key precursor lesion of esophageal adenocarcinoma. The aim of this study was to find a subset of markers that may allow the identification of patients at risk for esophageal adenocarcinoma, and to determine genes differentially expressed in esophageal squamous cell carcinoma. METHODS:Laser capture microdissection technique was applied to procure cells from defined regions. Genome-wide RNA profiling was performed on esophageal adenocarcinoma (n = 21), Barrett's esophagus (n = 20), esophageal squamous carcinoma (n = 9) and healthy esophageal biopsies (n = 18) using the Affymetrix Human Genome U133plus 2.0 array. Microarray results were validated by quantitative real-time polymerase chain reaction in a second and independent cohort and by immunohistochemistry of two putative markers in a third independent cohort. RESULTS:Through unsupervised hierarchical clustering and principal component analysis, samples were separated into four distinct groups that match perfectly with histology. Many genes down-regulated in esophageal cancers belong to the epidermal differentiation complex or the related GO-group "cornified envelope" of terminally differentiated keratinocytes. Similarly, retinol metabolism was strongly down-regulated. Genes showing strong overexpression in esophageal carcinomas belong to the GO groups extracellular region /matrix such as MMP1, CTHRC1, and INHBA. According to an analysis of genes strongly up-regulated in both esophageal adenocarcinoma and Barrett's esophagus, REG4 might be of particular interest as an early marker for esophageal adenocarcinoma. CONCLUSIONS:Our study provides high quality data, which could serve for identification of potential biomarkers of Barrett's esophagus at risk of esophageal adenocarcinoma progression. |
| Source: | Translational Oncology |
| ISSN: | 1936-5233 |
| Publisher: | Neoplasia Press |
| Volume: | 11 |
| Number: | 1 |
| Page Range: | 116-124 |
| Date: | February 2018 |
| Official Publication: | https://doi.org/10.1016/j.tranon.2017.10.003 |
| PubMed: | View item in PubMed |
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