LgR5 expression and cancer stem cell hypothesis: clue to define the true origin of esophageal adenocarcinomas with and without Barrett's Esophagus?

Please always quote using this URN: urn:nbn:de:bvb:20-opus-137783
  • Background Investigation of the expression of an intestinal stem cell marker in esophageal adenocarcinomas (EAC) with and without Barrett's Esophagus (BE), with respect to a cancer stem cell (CSC) hypothesis. Materials and methods Expression of a putative intestinal stem cell marker LgR5 was analyzed in esophageal cancer specimen (n = 70: 41 EAC with BE, 19 EAC without BE, and n = 10 esophageal squamous-cell carcinomas, ESCC) and in the adenocarcinoma cell line OE-33. Ki-67 and Cdx-2 were co-labelled with LgR5 in double stainingBackground Investigation of the expression of an intestinal stem cell marker in esophageal adenocarcinomas (EAC) with and without Barrett's Esophagus (BE), with respect to a cancer stem cell (CSC) hypothesis. Materials and methods Expression of a putative intestinal stem cell marker LgR5 was analyzed in esophageal cancer specimen (n = 70: 41 EAC with BE, 19 EAC without BE, and n = 10 esophageal squamous-cell carcinomas, ESCC) and in the adenocarcinoma cell line OE-33. Ki-67 and Cdx-2 were co-labelled with LgR5 in double staining experiments. Immunhistochemical expression results were confirmed by RT-PCR and correlated with tumor stage and five-year survival rates. Results LgR5was found expressed in 35 of 41 (85%) EAC with BE and in 16 of 19 (81%) EAC without BE. By contrast, LgR5 was not found to be expressed in ESCC. Quantification of immunolabeling showed 15% LgR5+ cells in EAC with BE, 32% LgR5+ cells in adjacent BE and 13% in EAC without BE. Immunofluorescence double staining experiments with LgR5 and Ki-67 revealed a subpopulation (~5%) of proliferating LgR+/Ki-67+ cells. On mRNA-level, expression of LgR5 was higher in BE in comparison to EAC (p = 0.0159). High levels of LgR5 expression in BE associated EAC were associated with poorer survival in univariate analysis. Conclusion The stem cell marker LgR5 is expressed in EAC, irrespective of association with BE, and appears to have negative impact on survival. The subset of proliferating LgR5+ cells (<5%) might resemble rapidly cycling CSCs, which needs to be substantiated in further investigations.show moreshow less

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Metadaten
Author: Burkhard H.A. von Rahden, Stefan Kircher, Maria Lazariotou, Christoph Reiber, Luisa Stuermer, Christoph Otto, Christoph T. Germer, Martin Grimm
URN:urn:nbn:de:bvb:20-opus-137783
Document Type:Journal article
Faculties:Medizinische Fakultät / Klinik und Poliklinik für Allgemein-, Viszeral-, Gefäß- und Kinderchirurgie (Chirurgische Klinik I)
Medizinische Fakultät / Klinik und Poliklinik für Thorax-, Herz- u. Thorakale Gefäßchirurgie
Medizinische Fakultät / Pathologisches Institut
Language:English
Parent Title (English):Journal of Experimental & Clinical Cancer Research
Year of Completion:2011
Volume:30
Issue:23
Source:Journal of Experimental & Clinical Cancer Research 2011, 30:23. DOI 10.1186/1756-9966-30-23
DOI:https://doi.org/10.1186/1756-9966-30-23
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 616 Krankheiten
Tag:Barrett-Ösophagus; Krebs
Release Date:2016/08/26
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2011
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung