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Tumor necrosis factor‐α modulates epithelial mesenchymal transition mediators ZEB2 and S100A4 to promote cholangiocarcinoma progression
Author(s) -
Techasen Anchalee,
Namwat Nisana,
Loilome Watcharin,
Duangkumpha Kassaporn,
Puapairoj Anucha,
Saya Hideyuki,
Yongvanit Puangrat
Publication year - 2014
Publication title -
journal of hepato‐biliary‐pancreatic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.63
H-Index - 60
eISSN - 1868-6982
pISSN - 1868-6974
DOI - 10.1002/jhbp.125
Subject(s) - epithelial–mesenchymal transition , tumor necrosis factor alpha , messenger rna , biology , immunostaining , transforming growth factor , metastasis , cancer research , microbiology and biotechnology , immunology , cancer , immunohistochemistry , gene , biochemistry , genetics
Background The epithelial‐mesenchymal transition ( EMT ) process strongly contributes to cancer metastasis. This study was to investigate the alteration of EMT ‐related proteins ( ZEB1 , ZEB2 and S100A4 ) in cholangiocarcinoma ( CCA ) tissues. The effect of tumor necrosis factor‐α ( TNF ‐α) on the expression of those molecules in CCA cells was investigated. Methods The quantitative reverse transcription‐polymerase chain reaction ( qRT ‐ PCR) assay was used to quantify ZEB1 , ZEB2 and S100A4 mRNA levels in 50 CCA tissues and related its expression to clinicopathological data. ZEB2 protein immunostaining was investigated in 165 CCA tissues. The effect of TNF ‐α on EMT ‐related CCA cell migration was evaluated using qRT‐ PCR , immunofluorescence and transwell migration assays. Results ZEB2 and S100A4 mRNA levels were found to be higher in CCA tissues. High levels of S100A4 mRNA and ZEB2 protein were significantly associated with CCA metastasis ( P = 0.04 and P = 0.03). Moreover, a trend toward statistical association was found with high levels of both ZEB2 mRNA and protein with shorter survival time ( P = 0.10 and P = 0.19). In addition, TNF ‐α induced CCA cell migration by the induction of transforming growth factor‐β ( TGF ‐β) resulting in ZEB2 and S100A4 mRNA and protein activation. Conclusions These studies demonstrate that TNF ‐α plays crucial role in the progression of CCA by activating TGF ‐β signaling and the induction of ZEB2 and S100A4 , EMT ‐related proteins expression.