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2016 ; 13
(4
): 3466-74
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Constitutive expression of Wnt/??catenin target genes promotes proliferation and
invasion of liver cancer stem cells
#MMPMID26956539
Chen W
; Zhang YW
; Li Y
; Zhang JW
; Zhang T
; Fu BS
; Zhang Q
; Jiang N
Mol Med Rep
2016[Apr]; 13
(4
): 3466-74
PMID26956539
show ga
Wnt/??catenin is an important signaling pathways involved in the tumorgenesis,
progression and maintenance of cancer stem cells (CSCs). In the present study,
the role of Wnt/??catenin signaling in CSC?mediated tumorigenesis and invasion in
liver CSCs was investigated. A small population of cancer stem?like side
population (SP) cells (3.6%) from liver cancer samples were identified. The cells
were highly resistant to drug treatment due to the enhanced expression of drug
efflux pumps, such as ABC subfamily G member 2, multidrug resistance protein 1
and ATP?binding cassette subfamily B member 5. Furthermore, using TOPflash and
reverse transcription?quantitative polymerase chain reaction analysis,
Wnt/??catenin signaling and the transcriptional regulation of Wnt/??catenin
target genes including dickkopf Wnt signaling pathway inhibitor 1, axis
inhibition protein 2 and cyclin D1 were observed to be markedly upregulated in
liver cancer SP cells. As a consequence, SP cells possessed infinite cell
proliferation potential and the ability to generating tumor spheres. In addition,
upon reducing Wnt/??catenin signaling, the rates of proliferation, tumor sphere
formation and tumor invasion of SP cells were markedly reduced. Therefore, these
data suggest that Wnt/??catenin signaling is a potential therapeutic target to
reduce CSC?mediated tumorigenicity and invasion in liver cancer.
|ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
[MESH]