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2017 ; 8
(8
): e2969
Nephropedia Template TP
gab.com Text
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English Wikipedia
Pigment epithelium-derived factor promotes tumor metastasis through an
interaction with laminin receptor in hepatocellular carcinomas
#MMPMID28771223
Hou J
; Ge C
; Cui M
; Liu T
; Liu X
; Tian H
; Zhao F
; Chen T
; Cui Y
; Yao M
; Li J
; Li H
Cell Death Dis
2017[Aug]; 8
(8
): e2969
PMID28771223
show ga
Pigment epithelium-derived factor (PEDF) has complex functions in tumor
metastasis, but little is known about the roles of PEDF and its receptors in
hepatocellular carcinoma (HCC). Here we found that high expression of PEDF is
associated with shorter overall survival in HCC patients. Forced expression of
PEDF enhanced HCC cell aggressive behavior in vitro and in vivo, whereas
silencing PEDF expression reduced migration and invasion. Furthermore, PEDF
expression led to changes in cell morphology and the expression of
epithelial-mesenchymal transition (EMT)-related markers via ERK1/2 signaling
pathway, including the upregulation of N-cadherin and slug, and the
downregulation of E-cadherin in HCC cells. Our results further showed that PEDF
could interact with laminin receptor (LR) and LR knockdown attenuated
PEDF-induced migration, invasion and the change of EMT-related markers. More
importantly, in clinical HCC specimens, we found that PEDF expression was
correlated with subcellular localization of LR, and that high expression of PEDF
and positive expression of LR predicted a poor prognosis. In conclusion, our
results demonstrate a novel functional role of PEDF/LR axis in driving metastasis
through ERK1/2-mediated EMT in HCC and provided a promising prognostic marker in
HCC.