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2014 ; 15
(9
): 1268-79
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Chk1-induced CCNB1 overexpression promotes cell proliferation and tumor growth in
human colorectal cancer
#MMPMID24971465
Fang Y
; Yu H
; Liang X
; Xu J
; Cai X
Cancer Biol Ther
2014[Sep]; 15
(9
): 1268-79
PMID24971465
show ga
The high morbidity and mortality of colorectal cancer pose a significant public
health problem worldwide. Here we assessed the pro-cancer efficacy and mechanism
of action of CCNB1 in different colorectal cancer cells. We provided evidence
that CCNB1 mRNA and protein level were upregulated in a subset of human
colorectal tumors, and positively correlated with Chk1 expression. Repression of
Chk1 caused a significant decrease in cell proliferation and CCNB1 protein
expression in colorectal cancer cells. Furthermore, downregulation of CCNB1
impaired colorectal cancer proliferation in vitro and tumor growth in vivo.
Specifically, suppression of CCNB1 caused a strong G 2/M phase arrest in both
HCT116 and SW480 cells, interfering with the expression of cdc25c and CDK1.
Additionally, CCNB1 inhibition induced apoptotic death in certain colorectal
cancer cells. Together, these results suggest that CCNB1 is activated by Chk1,
exerts its oncogenic role in colorectal cancer cells, and may play a key role in
the development of a novel therapeutic approach against colorectal cancer.