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2016 ; 7
(15
): 20193-208
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Bufalin suppresses hepatocellular carcinoma invasion and metastasis by targeting
HIF-1? via the PI3K/AKT/mTOR pathway
#MMPMID26958938
Wang H
; Zhang C
; Xu L
; Zang K
; Ning Z
; Jiang F
; Chi H
; Zhu X
; Meng Z
Oncotarget
2016[Apr]; 7
(15
): 20193-208
PMID26958938
show ga
It has been reported that there are multiple mechanisms by which bufalin could
exert its antimetastatic effect. HIF-1? has been reported to be involved in tumor
migration and invasion by regulating EMT. However, it is not known whether
bufalin could exert the antimetastatic effect by modulating HIF-1? expression in
hepatocellular carcinoma. In the present study, we aimed to evaluate the
antimetastatic potential of bufalin in vivo and in vitro. Our results
demonstrated that the liver/lung metastases were significantly reduced in
bufalin-treated mice, as tested in the orthotopic transplanted and tail vein
injection tumor models. Furthermore, the epithelial-to-mesenchymal transition
(EMT) was inhibited in bufalin-treated tumors, as reflected the upregulation of
E-cadherin, and downregulation of N-cadherin, vimentin, Snail. Similar results
were observed in SMMC7721 cells treated with bufalin. Moreover, the transforming
growth factor-?1 (TGF-?1)-induced EMT was also abrogated by bufalin.
Mechanistically, our study demonstrated that hypoxia-inducible factor-1? (HIF-1?)
played an important role in the antimetastatic effect of bufalin in
hepatocellular carcinoma. Importantly, HIF-1? expression may be regulated through
the inhibition of the PI3K/AKT/mTOR pathway. Taken together, our results suggest
that bufalin suppresses hepatic tumor invasion and metastasis and that this
process may be related to the PI3K/AKT/mTOR/ HIF-1? axis.