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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Transl+Res
2017 ; 9
(6
): 2956-2965
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MiR-155 up-regulated by TGF-? promotes epithelial-mesenchymal transition,
invasion and metastasis of human hepatocellular carcinoma cells in vitro
#MMPMID28670383
Li DP
; Fan J
; Wu YJ
; Xie YF
; Zha JM
; Zhou XM
Am J Transl Res
2017[]; 9
(6
): 2956-2965
PMID28670383
show ga
It has previously been reported that microRNA (miR)-155 is linked to the
recurrence and prognosis of hepatocellular carcinoma (HCC) following liver
transplantation. However, the role of miR-155 in the invasion and metastasis of
HCC cells remains largely unclear. The aim of this study was to investigate the
expression of miR-155 in HCC cells and its role in the invasion and migration of
HCC cells in vitro. We found that the level of expression of miR-155 in HCC
tissues and cells was significantly increased compared with non-tumorous adjacent
tissues. Further study revealed that recombinant human transforming growth
factor-? (TGF-?1) up-regulated the expression of miR-155 in HCC cells in vitro.
Further, the overexpression of miR-155 in HCC cell line Huh-7 led to increased
levels of cell invasion and migration compared with untreated control Huh-7
cells. MiR-155-overexpressed Huh-7 cells also exhibited altered levels of
expression of certain cellular adhesion molecules related to
epithelial-mesenchymal transition (EMT), including low levels of CDH1 and higher
levels of FN1, SNAI1 and ZEB1, compared with control Huh-7 cells. Moreover, it
was found that the overexpression of miR-155 and of TGF-?1 protein decreased the
expression of E-Cadherin and increased the expression of Vimentin in Huh-7 cells.
These results indicate that an increased level of miR-155 in HCC cells, possibly
due to stimulation by TGF-?1, accelerates the process of EMT, promotes cellular
invasion and migration in vitro, and thereby further promotes the progression of
HCC.