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2015 ; 6
(13
): 11492-506
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English Wikipedia
Metastasis-associated in colon cancer-1 promotes vasculogenic mimicry in gastric
cancer by upregulating TWIST1/2
#MMPMID25895023
Wang L
; Lin L
; Chen X
; Sun L
; Liao Y
; Huang N
; Liao W
Oncotarget
2015[May]; 6
(13
): 11492-506
PMID25895023
show ga
Vasculogenic mimicry (VM) is a blood supply modality that is strongly associated
with the epithelial-mesenchymal transition (EMT), TWIST1 activation and tumor
progression. We previously reported that metastasis-associated in colon cancer-1
(MACC1) induced the EMT and was associated with a poor prognosis of patients with
gastric cancer (GC), but it remains unknown whether MACC1 promotes VM and
regulates the TWIST signaling pathway in GC. In this study, we investigated MACC1
expression and VM by immunohistochemistry in 88 patients with stage IV GC, and
also investigated the role of TWIST1 and TWIST2 in MACC1-induced VM by using nude
mice with GC xenografts and GC cell lines. We found that the VM density was
significantly increased in the tumors of patients who died of GC and was
positively correlated with MACC1 immunoreactivity (p < 0.05). The 3-year survival
rate was only 8.6% in patients whose tumors showed double positive staining for
MACC1 and VM, whereas it was 41.7% in patients whose tumors were negative for
both MACC1 and VM. Moreover, nuclear expression of MACC1, TWIST1, and TWIST2 was
upregulated in GC tissues compared with matched adjacent non-tumorous tissues (p
< 0.05). Overexpression of MACC1 increased TWIST1/2 expression and induced
typical VM in the GC xenografts of nude mice and in GC cell lines. MACC1 enhanced
TWIST1/2 promoter activity and facilitated VM, while silencing of TWIST1 or
TWIST2 inhibited VM. Hepatocyte growth factor (HGF) increased the nuclear
translocation of MACC1, TWIST1, and TWIST2, while a c-Met inhibitor reduced these
effects. These findings indicate that MACC1 promotes VM in GC by regulating the
HGF/c-Met-TWIST1/2 signaling pathway, which means that MACC1 and this pathway are
potential new therapeutic targets for GC.