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2017 ; 8
(10
): 16972-16987
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Growth differentiation factor 15 induces growth and metastasis of human liver
cancer stem-like cells via AKT/GSK-3?/?-catenin signaling
#MMPMID28199981
Xu Q
; Xu HX
; Li JP
; Wang S
; Fu Z
; Jia J
; Wang L
; Zhu ZF
; Lu R
; Yao Z
Oncotarget
2017[Mar]; 8
(10
): 16972-16987
PMID28199981
show ga
Cancer stem cells in liver cancer are thought to be responsible for tumor
recurrence and metastasis. However, the factors that mediate this mechanism have
yet to be completely elucidated. In this study, we isolated CD13+CD44+ sphere
cells (SCs) derived from liver cancer tissues and SK-Hep-1 cells, which possessed
cancer stem cell-like properties. Through cytokine array analysis, growth
differentiation factor 15 (GDF15) was significantly increased in SCs. Clinical
data showed GDF15 was overexpressed in liver cancer tissues and was positively
related to pathological grading. GDF15 knockdown significantly inhibited the
growth and metastasis of SCs through AKT/GSK-3?/?-catenin pathway suppression.
Moreover, a PI3K inhibitor LY294002 inhibited AKT/GSK-3?/?-catenin pathway
activated by GDF15 and attenuated GDF15-induced proliferation, colony formation
and invasion of SCs. CONCLUSION: Our studies suggest that CD13+CD44+ SCs may
represent a subset of LCSCs. GDF15 promotes the growth and metastasis of SCs by
activating AKT/GSK-3?/?-catenin signaling pathway. Promisingly, GDF15 could be
considered as a potential therapeutic target in liver cancer.