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2015 ; 5
(ä): 16492
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TIMP-1 mediates TGF-?-dependent crosstalk between hepatic stellate and cancer
cells via FAK signaling
#MMPMID26549110
Park SA
; Kim MJ
; Park SY
; Kim JS
; Lim W
; Nam JS
; Yhong Sheen Y
Sci Rep
2015[Nov]; 5
(ä): 16492
PMID26549110
show ga
Transforming growth factor-? (TGF-?) signaling plays a key role in progression
and metastasis of HCC. This study was undertaken to gain the proof of concept of
a small-molecule inhibitor of TGF-? type I receptor kinase, EW-7197 as a potent
anti-cancer therapy for HCC. We identified tissue inhibitors of
metalloproteinases-1 (TIMP-1) as one of the secreted proteins of hepatic stellate
cells (HSCs) and a key mediator of TGF-?-mediated crosstalk between HSCs and HCC
cells. TGF-? signaling led to increased expression of TIMP-1, which activates
focal adhesion kinase (FAK) signaling via its interaction with CD63. Inhibition
of TGF-? signaling using EW-7197 significantly attenuated the progression and
intrahepatic metastasis of HCC in an SK-HEP1-Luc orthotopic-xenograft mouse
model. In addition, EW-7197 inhibited TGF-?-stimulated TIMP-1 secretion by HSCs
as well as the TIMP-1-induced proliferation, motility, and survival of HCC cells.
Further, EW-7197 interrupted TGF-?-mediated epithelial-to-mesenchymal transition
and Akt signaling, leading to significant reductions in the motility and
anchorage-independent growth of HCC cells. In conclusion, we found that TIMP-1
mediates TGF-?-regulated crosstalk between HSCs and HCC cells via FAK signaling.
In addition, EW-7197 demonstrates potent in vivo anti-cancer therapeutic activity
and may be a potential new anti-cancer drug of choice to treat patients with
liver cancer.