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2017 ; 36
(1
): 125
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ICG-001 suppresses growth of gastric cancer cells and reduces chemoresistance of
cancer stem cell-like population
#MMPMID28893318
Liu Y
; Chen H
; Zheng P
; Zheng Y
; Luo Q
; Xie G
; Ma Y
; Shen L
J Exp Clin Cancer Res
2017[Sep]; 36
(1
): 125
PMID28893318
show ga
BACKGROUND: ICG-001, a small molecule, binds CREB-binding protein (CBP) to
disrupt its interaction with ?-catenin and inhibits CBP function as a
co-activator of Wnt/?-catenin-mediated transcription. Given its ability to
inhibit Wnt/?-catenin signaling pathway, ICG-001 has been used in some tumor
types to exert its anticarcinogenic effect. Here, we examined ICG-001 and its
potential role as a therapeutic in gastric cancer (GC). METHODS: The gastric
cancer cell lines SGC-7901, MGC-803, BGC-823 and MKN-45 were used in vitro and in
vivo. The abilities of cell proliferation, tumor sphere formation, metastasis,
tumorgenesis and chemoresistance to chemotherapy drugs in vitro were evaluated by
MTT assay, colony formation assay, flow cytometry, migration and invasion assay,
and tumor spheres culture. The in vivo experiments were performed using a
subcutaneous transplantation tumor model in athymic nude mice. Alterations at RNA
and protein levels were followed by qRT-PCR, western blot, coimmunoprecipitations
and immunofluorescence assay. RESULTS: In this study, we showed that ICG-001
significantly inhibited growth and metastasis of multiple GC cell lines, induced
cell apoptosis, and augmented in vitro tumor spheres suppression when used in
combination with chemotherapy drugs probably through robustly blocking
association of ?-catenin with CBP and N-cadherin, but promoting association of
?-catenin with P300 and E-cadherin, instead of altering the distribution and
expression of ?-catenin. CONCLUSIONS: Our findings suggest that ICG-001
suppresses GC cell line growth, metastasis and reduces its stem cell-like
properties and chemoresistance, indicating that ICG-001 is a potentially useful
small molecule therapeutic for GC.