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2018 ; 57
(5
): 640-652
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SH2B1 promotes epithelial-mesenchymal transition through the IRS1/?-catenin
signaling axis in lung adenocarcinoma
#MMPMID29380446
Wang S
; Cheng Y
; Gao Y
; He Z
; Zhou W
; Chang R
; Peng Z
; Zheng Y
; Duan C
; Zhang C
Mol Carcinog
2018[May]; 57
(5
): 640-652
PMID29380446
show ga
Lung adenocarcinoma (LADC), the most prevalent type of human lung cancer, is
characterized by many molecular abnormalities. SH2B1, a member of the SH2-domain
containing family, have recently been shown to act as tumor activators in
multiple cancers, including LADC. However, the mechanisms underlying SH2B1
overexpression are not completely understood. Here, we reported that SH2B1
expression levels were significantly upregulated and positively associated with
EMT markers and poor patient survival in LADC specimens. Modulation of SH2B1
levels had distinct effects on cell proliferation, cell cycle, migration,
invasion, and morphology in A549 and H1299 cells in vitro and in vivo. At the
molecular level, overexpression of SH2B1 resulted in the upregulation of the EMT
markers, especially induced ?-catenin accumulation and activated ?-catenin
signaling to promote LADC cell proliferation and metastasis, while silencing
SH2B1 had the opposite effect. Furthermore, ectopic expression of SH2B1 in H1299
cells increased IRS1 expression level. Reduced expression of IRS1 considerably
inhibited H1299 cell proliferation, migration, and invasion which were driven by
SH2B1 overexpression. Collectively, these results provide unequivocal evidence to
establish that SH2B1-IRS1-?-catenin axis is required for promoting EMT, and might
prove to be a promising strategy for restraining tumor progression in LADC
patients.
|*Up-Regulation
[MESH]
|A549 Cells
[MESH]
|Adaptor Proteins, Signal Transducing/*metabolism
[MESH]