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2018 ; 37
(29
): 3953-3966
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Capillary morphogenesis gene 2 maintains gastric cancer stem-like cell phenotype
by activating a Wnt/?-catenin pathway
#MMPMID29662192
Ji C
; Yang L
; Yi W
; Xiang D
; Wang Y
; Zhou Z
; Qian F
; Ren Y
; Cui W
; Zhang X
; Zhang P
; Wang JM
; Cui Y
; Bian X
Oncogene
2018[Jul]; 37
(29
): 3953-3966
PMID29662192
show ga
A growing body of evidence shows that the development and progression of gastric
cancer (GC) is mainly associated to the presence of gastric cancer stem-like
cells (GCSLCs). However, it is unclear how GCSLC population is maintained. This
study aimed to explore the role of capillary morphogenesis gene 2 (CMG2) in GCSLC
maintenance and the relevance to GC progression. We found that CMG2 was highly
expressed in GC tissues and the expression levels were associated with the
invasion depth and lymph node metastasis of GC, and inversely correlated with the
survival of GC patients. Sorted CMG2(High) GC cells preferentially clustered in
CD44(High) stem-like cell population, which expressed high levels of
stemness-related genes with increased capabilities of self-renewal and
tumorigenicity. Depletion of CMG2 gene resulted in reduction of GCSLC population
with attenuated stemness and decrease of invasive and metastatic capabilities
with subdued epithelial-mesenchymal transition phenotype in GC cells.
Mechanistically, CMG2 interacted with LRP6 in GCSLCs to activate a Wnt/?-catenin
pathway. Thus, our results demonstrate that CMG2 promotes GC progression by
maintaining GCSLCs and can serve as a new prognostic indicator and a target for
human GC therapy.