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Nestin, a class VI intermediate filament, is a neuronal stem/progenitor cell marker that is also expressed by various types of cancer, including pancreatic ductal adenocarcinoma (PDAC). We previously detected nestin expression in approximately 30% of PDAC cases, and found that nestin promotes the migration, invasion and metastasis of cells. Findings of recent studies have shown that epithelial mesenchymal transition (EMT) is important in the invasion and migration of cancer. In the present study, we investigated whether an altered nestin expression affected the expression levels of EMT markers in PDAC cells. Two human PDAC cell lines, PK-45H and KLM-1, in which nestin was suppressed and overexpressed, respectively, were used. The expression levels of the EMT-related molecules E-cadherin, Snail, Slug and Twist were analyzed using quantitative RT-PCR. Results showed that E-cadherin expression was decreased in nestin-overexpressed KLM-1 cells, and increased in nestin-suppressed PK-45H cells. Snail gene expression in the PDAC cells was altered concomitantly with the changes in nestin expression, while the Slug gene expression was significantly decreased in nestin-overexpressed KLM-1 cells. The Twist gene expression was below the detection limit in the two PDAC cell lines. The present findings indicated that nestin may be involved in the control of cancer behaviors in PDAC via the modulation of EMT-related molecules.

Nestin regulates epithelial-mesenchymal transition marker expression in pancreatic ductal adenocarcinoma cell lines