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2018 ; 9
(8
): 802
Nephropedia Template TP
gab.com Text
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Overexpression of PEAK1 contributes to epithelial-mesenchymal transition and
tumor metastasis in lung cancer through modulating ERK1/2 and JAK2 signaling
#MMPMID30038287
Ding C
; Tang W
; Fan X
; Wang X
; Wu H
; Xu H
; Xu W
; Gao W
; Wu G
Cell Death Dis
2018[Jul]; 9
(8
): 802
PMID30038287
show ga
Pseudopodium-enriched atypical kinase 1 (PEAK1), a novel non-receptor tyrosine
kinase, has been demonstrated to act as an oncogenic regulator in breast and
pancreatic cancers. However, the role of PEAK1 in the progression and metastasis
of lung cancer is still unknown. Here, we observed that ectopic PEAK1 expression
promoted lung cancer cell migration and invasion, while PEAK1 knockout resulted
in suppressed cell migration and invasion. Interestingly, cell proliferation did
not significantly increase or decrease in either the PEAK1 overexpression or
knockout groups compared with the corresponding control cells. In addition, PEAK1
overexpression could induce epithelial-to-mesenchymal transition (EMT) and the
expression of matrix metalloproteinase-2 (MMP2) and MMP9 both in vitro and in
vivo, whereas PEAK1 knockout had the opposite effects. Then, we had confirmed
that PEAK1 was significantly upregulated in lung cancer tissues, and correlated
with a higher tumor node metastasis stage. Moreover, PEAK1 upregulation markedly
enhanced the activation of extracellular signal-regulated kinase-1/2 (ERK1/2) and
Janus kinase-2 (JAK2) signaling in lung cancer cells. Further work demonstrated
that the combination of PD98059 with AZD1480 could reverse the effects of
PEAK1-induced EMT, cell migration and invasion. Our findings highlight a newer
mechanism for PEAK1 in regulating EMT and metastasis in lung cancer, which might
serve as a therapeutic target for lung cancer patients.