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http://dx.doi.org/10.7314/APJCP.2015.16.7.2777

Correlation of Overexpression of Nestin with Expression of Epithelial-Mesenchymal Transition-Related Proteins in Gastric Adenocarcinoma  

Liu, Jin-Kai (Cancer Research Institute, First School of Clinical Medicine, Southern Medical University)
Chen, Wan-Cheng (Department of Hematology, First School of Clinical Medicine, Southern Medical University)
Ji, Xiao-Zhen (Cancer Research Institute, First School of Clinical Medicine, Southern Medical University)
Zheng, Wen-Hong (Cancer Research Institute, First School of Clinical Medicine, Southern Medical University)
Han, Wei (Cancer Research Institute, First School of Clinical Medicine, Southern Medical University)
An, Jing (Cancer Research Institute, First School of Clinical Medicine, Southern Medical University)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.16, no.7, 2015 , pp. 2777-2783 More about this Journal
Abstract
Background: Nestin is associated with neoplastic transformation. However, the mechanisms by which nestin contributes regarding invasion and malignancy of gastric adenocarcinoma (GAC) remain unknown. Recent studies have shown that the epithelial-mesenchymal transition (EMT) is important in invasion and migration of cancer cells. In the present study, we aimed to investigate the expression of nestin and its correlation with EMT-related proteins in GAC. Materials and Methods: The expression of nestin and EMT-related proteins was examined in GAC specimens and cell lines by immunohistochemistry and Western blotting. Clinicopathological features and survival outcomes were retrospectively analyzed. Results: Positive nestin immunostaining was most obviously detected in the cytoplasm, nucleus or both cytoplasm and nucleus of tumor cells in 19.2% (24/125) of GAC tissues, which was significantly higher than that in normal gastric mucosa tissues (1.7%, 1/60) (p=0.001). Nestin expression was closely related to several clinicopathological factors and EMT-related proteins (E-cadherin, vimentin and Snail) and displayed a poor prognosis. Interestingly, simultaneous cytoplasmic and nuclear nestin expression correlated with EMT-related proteins (E-cadherin, vimentin and Snail) (p<0.05) and lymph node metastasis (p=0.041) and a shorter survival time (p<0.05), but this was not the case with cytoplasmic or nuclear nestin expression. Conclusions: Nestin, particularly expression in both cytoplasm and nucleus, might be involved in regulating EMT and malignant progression in GAC, with potential as an unfavorable indicator in tumor diagnosis and a target for clinical therapy.
Keywords
Nestin; epithelial-mesenchymal transition; gastric adenocarcinoma; immunohistochemistry; prognosis;
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