Abstract
G A A b st ra ct s differentiation, thus showing that in analogy to the intestine, esophageal stemness is lost. Using RNA micro-arrays, we identified a gene signature of 47 genes that were lost in both individual cell lines upon induction of ER stress. Of these genes, we found 29 genes to be restricted to the basal layer of the mouse esophagus. Out of these 29, nine genes show expression in only a small proportion of the basal cells, potentially marking stem cells. Conclusion: ER stress depletes esophageal precursor cells. Our in vitro screen combined with in situ hybridization identified nine genes that are specifically expressed in a subset of proliferating genes, thereby potentially marking esophageal stem cells.
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