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2016 ; 7
(4
): 4252-64
Nephropedia Template TP
gab.com Text
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English Wikipedia
Upregulation of flotillin-1 promotes invasion and metastasis by activating TGF-?
signaling in nasopharyngeal carcinoma
#MMPMID26646322
Cao S
; Cui Y
; Xiao H
; Mai M
; Wang C
; Xie S
; Yang J
; Wu S
; Li J
; Song L
; Guo X
; Lin C
Oncotarget
2016[Jan]; 7
(4
): 4252-64
PMID26646322
show ga
Metastasis is the main cause of cancer-related deaths. Nasopharyngeal carcinoma
(NPC) is characterized by severe local invasion and high incidence of regional
lymph node metastasis, which represents poor prognosis. However, the underlying
mechanism that induces lymph node metastasis of NPC remains largely unknown.
Herein, we report that flotillin-1 (FLOT1), a component of lipid raft, which was
reported to be involved in tumor progression, was robustly upregulated in the NPC
samples with lymph node metastasis. High FLOT1 expression was significantly
associated with N classification as well as poorer overall and disease-free
survivals in 169 archived clinical NPC samples. Overexpression of FLOT1 enhanced
the migratory and invasive abilities of NPC cells in vitro, and more importantly,
promoted invasion into the surrounding tissues and metastasis to lymph nodes in
vivo. Whereas silencing of endogenous FLOT1 in NPC cells decreased the local
invasion and metastasis to lymph nodes. Furthermore, FLOT1 induced the expression
and secretion of TGF-?1, facilitated the activation of TGF-?/Smad3 signaling to
effectuate epithelial-mesenchymal transition. Our findings present new evidence
that FLOT1 plays an important role in promoting aggressive behavior of NPC and
provide new insights into the regulatory mechanism of TGF-? signaling.