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2018 ; 24
(ä): 2098-2108
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Ezrin/NF-?B Pathway Regulates EGF-induced Epithelial-Mesenchymal Transition
(EMT), Metastasis, and Progression of Osteosarcoma
#MMPMID29628496
Liu P
; Yang P
; Zhang Z
; Liu M
; Hu S
Med Sci Monit
2018[Apr]; 24
(ä): 2098-2108
PMID29628496
show ga
BACKGROUND Epithelial-mesenchymal transition (EMT) is responsible for metastasis
of cancers, and NF-?B can promote tumor progression. Ezrin is an important
molecule participating in EMT. However, whether Ezrin mediates NF-?B in
EGF-induced osteosarcoma is unknown. MATERIAL AND METHODS Ezrin phosphorylation,
NF-?B activation, and EGF-induced EMT were studied in MG63 and U20S cells with
NF-?B inhibition, silencing, or over-expressing Ezrin. Cell morphology,
proliferation, migration, and motility were analyzed. An osteosarcoma model was
established in mice by injecting MG63 and U20S and reducing Ezrin. RESULTS With
EGF induction in vitro, Ezrin Tyr353 and Thr567 were phosphorylated, and EMT,
proliferation, migration, and motility of osteosarcoma cells were promoted.
Silencing Ezrin suppressed and over-expressing Ezrin promoted the nuclear
translocation of p65 and phosphorylated I?B? (p-I?B?) in EGF-induced osteosarcoma
cells. NF-?B inhibitor blocked EGF-induced EMT in both cell types, as well as
reserving cell morphology and suppressing proliferation, migration, and motility.
In vivo, reducing Ezrin significantly suppressed metastasis of osteosarcoma
xenografts, increased liver and lung weights, and activated NF-?B, which were
both induced by EGF. CONCLUSIONS Ezrin/NF-?B regulated EGF-induced EMT, as well
as progression and metastasis of osteosarcoma in vivo and in vitro. Ezrin/NF-?B
may be a new therapeutic target to prevent osteosarcoma from deterioration.