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Altered expression of CD44 and DKK1 in the progression of Barrett’s esophagus to esophageal adenocarcinoma

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Abstract

Barrett’s esophagus (BE) is an acquired condition in which the normal lining of the esophagus is replaced by intestinal metaplastic epithelium. BE can evolve to esophageal adenocarcinoma (EAC) through low-grade dysplasia (LGD) and high-grade dysplasia (HGD). The only generally accepted marker for increased risk of EAC is the presence of HGD, diagnosed on endoscopic biopsies. More specific markers for the prediction of EAC risk are needed. A tissue microarray was constructed comprising tissue samples from BE, LGD, HGD, and EAC. Marker expression was studied by immunohistochemistry using antibodies against CD44, DKK1, CDX2, COX2, SOX9, OCT1, E-cadherin, and β-catenin. Immunostaining was evaluated semi-quantitatively. CD44 expression decreased in HGD and EAC relative to BE and LGD. DKK1 expression increased in HGD and EAC relative to BE and LDG. CDX2 expression increased in HGD but decreased in EAC. COX2 expression decreased in EAC, and SOX9 expression increased only in the upper crypt epithelial cells in HGD. E-cadherin expression decreased in EAC. Nuclear β-catenin was not significantly different between BE, LGD, and HGD. Loss of CD44 and gain of DKK1 expression characterizes progression from BE and LGD to HGD and EAC, and their altered expression might indicate an increased risk for developing an EAC. This observation warrants inclusion of these immunohistochemically detectable markers in a study with a long patient follow-up.

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We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands

    T. Darlavoix

  2. Unilabs Lausanne-Cypa, Laboratory of Cytology and Pathology, Lausanne, Switzerland

    W. Seelentag

  3. University Institute of Pathology, University of Lausanne, Rue du Bugnon 25, 1011, Lausanne, Switzerland

    P. Yan, A. Bachmann & F. T. Bosman

Authors
  1. T. Darlavoix
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  2. W. Seelentag
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  3. P. Yan
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  4. A. Bachmann
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  5. F. T. Bosman
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Correspondence to F. T. Bosman.

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Darlavoix, T., Seelentag, W., Yan, P. et al. Altered expression of CD44 and DKK1 in the progression of Barrett’s esophagus to esophageal adenocarcinoma. Virchows Arch 454, 629–637 (2009). https://doi.org/10.1007/s00428-009-0769-z

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  • DOI: https://doi.org/10.1007/s00428-009-0769-z

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