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. 2018 Feb;15(2):2287-2295.
doi: 10.3892/ol.2017.7566. Epub 2017 Dec 8.

β-catenin, leucine-rich repeat-containing G protein-coupled receptor 5 and GATA-binding factor 6 are associated with the normal mucosa-adenoma-adenocarcinoma sequence of colorectal tumorigenesis

Affiliations

β-catenin, leucine-rich repeat-containing G protein-coupled receptor 5 and GATA-binding factor 6 are associated with the normal mucosa-adenoma-adenocarcinoma sequence of colorectal tumorigenesis

Bin Yang et al. Oncol Lett. 2018 Feb.

Abstract

In the present study, the expression of β-catenin, leucine-rich repeat-containing G protein-coupled receptor 5 (LGR5) and GATA6 was investigated during the transition from normal mucosa through to adenoma and adenocarcinoma in colorectal tissue sections obtained from 65 patients with a pathological diagnosis of colorectal adenocarcinoma and a history of adenoma. Immunohistochemical staining of β-catenin, LGR5 and GATA6 was performed and evaluated. The nuclear expression of β-catenin and the cytoplasmic expression of LGR5 and GATA6 were increased in samples as they progressed from normal mucosa to adenoma and adenocarcinoma. However, membrane-bound β-catenin and nuclear GATA6 expression decreased. Positive correlations were observed between the expression of LGR5 and cytoplasmic GATA6 in adenoma (P=0.0005; rs=0.48) and adenocarcinoma samples (P=0.007; rs=0.38): However, no significant association was observed in normal mucosa (P=0.399). The expression of nuclear β-catenin was significantly increased in the serosal layer compared with the invasive layers of the colorectal wall in samples of adenocarcinoma (P=0.042). The results of the present study suggest that the nuclear expression of β-catenin and LGR5 and the cytoplasmic expression of GATA6 function together during the development of colorectal carcinoma.

Keywords: GATA6; colorectal cancer; leucine-rich repeat-containing G protein-coupled receptor 5; tumorigenesis; β-catenin.

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Figures

Figure 1.
Figure 1.
The expression and intracellular localization of β-catenin, LGR5 and GATA6 in a normal mucosa-adenoma-adenocarcinoma sequence. (A) Immunolabeling patterns and (B) quantitative analysis of β-catenin; (C) immunolabeling patterns and (D) quantitative analysis of LGR5; and (E) immunolabeling and (F) quantitative analysis of GATA6 in representative colorectal tissues, including normal mucosa, adenomas and adenocarcinomas obtained from the same patient. Scale bar=50 µm. *P<0.05, **P<0.01. LGR5, leucine-rich repeat-containing G protein-coupled receptor 5; GATA6, GATA-binding factor 6.

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