TNF-α-inducing protein of Helicobacter pylori induces epithelial-mesenchymal transition (EMT) in gastric cancer cells through activation of IL-6/STAT3 signaling pathway.

Abstract:

:Tumor necrosis factor (TNF)-α-inducing protein (Tipα) is a newly identified carcinogenic factor secreted by Helicobacter pylori (H. pylori). Although it has been proved that Tipα is a strong inducer of epithelial-mesenchymal transition (EMT), a crucial process of migration, the exact molecular mechanism is unknown. Current evidence indicates that the oncogenic transcription factor signal transducers and activators of transcription 3 (STAT3) is inappropriately activated in multiple malignancies, including gastric cancer. In this study, we showed that Tipα significantly down-regulated the expression of EMT-related markers E-cadherin as well as up-regulated N-cadherin and vimentin in SGC7901 cells, with typical morphological changes of EMT. Tipα also promoted proliferation and migration of SGC7901 cells. Furthermore, Tipα activated interleukin-6 (IL-6)/STAT3 signaling pathway in SGC7901 cells. The effects of Tipα treatment observed was abolished when we block IL-6/STAT3 signaling pathway. Altogether, our data demonstrated that Tipα may accelerate tumor aggressiveness in gastric cancer by promoting EMT through activation of IL-6/STAT3 pathway.

authors

Chen G,Tang N,Wang C,Xiao L,Yu M,Zhao L,Cai H,Han L,Xie C,Zhang Y

doi

10.1016/j.bbrc.2017.01.110

subject

Has Abstract

pub_date

2017-03-04 00:00:00

pages

311-317

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(17)30169-9

journal_volume

484

pub_type

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