Thrombin conducts epithelial‑mesenchymal transition via protease‑activated receptor‑1 in human gastric cancer.

Abstract:

:Epithelial-mesenchymal transition (EMT) is thought to be a key step for cancer metastasis. Using an immunohistochemical approach with gastric carcinoma tissue, we found the expression of protease-activated receptor-1 (PAR1), along with a metalloproteinase known to activate PAR1, were associated with poorer prognosis, compared with expression-negative tumors, and activated PAR1 promotes gastric cancer cell invasion and proliferation in vivo. In this study we observed EMT induction by the PAR1 agonist α-thrombin, in human gastric cell lines stably expressing PAR1. We investigated α-thrombin-induced changes in the cell forms of pcDNA3.1-MKN45 (MKN45/Mock), pcDNA3.1‑PAR1 transfected MKN45 (MKN45/PAR1), and MKN74. Expression levels of epithelial and mesenchymal markers as well as the distribution of transcriptional factors of E-cadherin in the cytoplasm and nucleus were also noted in these cell lines. We observed α-thrombin-induced morphological changes in MKN45/PAR1 and MKN74 cells. Western blotting and immunohistochemistry of these cells indicated a fall in the expression level of E-cadherin and an increase in fibronectin expression after 48 h. PAR1 activation also induced significant increases in nuclear levels of the Snail which is a repressor of E-cadherin gene expression. We found EMT in gastric cancer cell lines that underwent α-thrombin-induced PAR1 activation.

journal_name

Int J Oncol

authors

Otsuki T,Fujimoto D,Hirono Y,Goi T,Yamaguchi A

doi

10.3892/ijo.2014.2651

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

2287-94

issue

6

eissn

1019-6439

issn

1791-2423

journal_volume

45

pub_type

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