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2017 ; 8
(6
): e2838
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Deficiency of pigment epithelium-derived factor in nasopharyngeal carcinoma cells
triggers the epithelial-mesenchymal transition and metastasis
#MMPMID28569772
Zhang T
; Yin P
; Zhang Z
; Xu B
; Che D
; Dai Z
; Dong C
; Jiang P
; Hong H
; Yang Z
; Zhou T
; Shao J
; Xu Z
; Yang X
; Gao G
Cell Death Dis
2017[Jun]; 8
(6
): e2838
PMID28569772
show ga
Distant metastasis is the primary cause of nasopharyngeal carcinoma (NPC)
treatment failure while epithelial-mesenchymal transition (EMT) is the critical
process of NPC invasion and metastasis. However, tumor-suppressor genes involved
in the EMT and metastasis of NPC have not been explored clearly compared with the
oncogenes. In the present study, the expression of pigment epithelium-derived
factor (PEDF), a potent endogenous antitumor factor, was diminished in human NPC
tissues and associated with clinicopathological and EMT features. The knockdown
of PEDF induced EMT in lower metastatic NPC cell lines and overexpression of PEDF
restored epithelial phenotype in higher metastatic NPC cell lines with typical
EMT. The inhibition of PEDF mediated NPC cell spontaneous metastasis in vivo.
LRP6/GSK3?/?-catenin signal pathway rather than AKT/GSK3? pathway was involved in
the effects of PEDF on EMT. The expression of PEDF was directly downregulated by
elevated miR-320c in NPC. In conclusion, our findings indicate for the first time
that PEDF functions as tumor-suppressor gene in the occurrence of EMT and
metastasis in NPC. PEDF could serve as a promising candidate for NPC diagnosis,
prognosis and treatment.