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2018 ; 40
(1
): 217-225
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?Klotho inhibits androgen/androgen receptor?associated epithelial?mesenchymal
transition in prostate cancer through inactivation of ERK1/2 signaling
#MMPMID29749458
Liu Z
; Zhang H
; Ding S
; Qi S
; Liu S
; Sun D
; Dong W
; Yin L
; Li M
; Zhao X
; Lu J
Oncol Rep
2018[Jul]; 40
(1
): 217-225
PMID29749458
show ga
The epithelial?mesenchymal transition (EMT) is reported to have intimate
crosstalk with androgen receptor (AR) signaling in prostate cancer (PCa) and is
known to be responsible for castration resistance. Fibroblast growth
factor/receptor (FGF/FGFR) signaling is also involved in tumor progression and
EMT in multiple tissues. Several studies have investigated the role of ?Klotho,
an FGF/FGFR signaling co?receptor in tumorigenesis. However, its role in PCa
remains unknown. In the present study, the role of androgen in the EMT of PCa
cells was examined by western blotting. The expression of ?Klotho was examined in
prostate cells and PCa tissues by western blotting and immunohistochemistry,
respectively. The biological role of ?Klotho was revealed by a series of
functional in vitro and in vivo studies. We determined that ?Klotho expression
was significantly decreased in PCa tissues compared with benign prostatic
hyperplasia (BPH) tissues, and low ?Klotho expression was associated with a high
Gleason score of PCa. ?Klotho overexpression inhibited the viability, migration,
and androgen/AR?associated EMT of PCa cells through the inactivation of ERK1/2
signaling. Notably, ?Klotho overexpression inhibited prostate tumor growth and
EMT in vivo. Knockdown of ?Klotho produced the opposite effects. In conclusion,
?Klotho inhibits EMT and plays a tumor?suppressive role in PCa, linking
FGF/FGFR/?Klotho signaling to the regulation of PCa progression.