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2017 ; 8
(34
): 57187-57200
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Morusin inhibits cell proliferation and tumor growth by down-regulating c-Myc in
human gastric cancer
#MMPMID28915664
Wang F
; Zhang D
; Mao J
; Ke XX
; Zhang R
; Yin C
; Gao N
; Cui H
Oncotarget
2017[Aug]; 8
(34
): 57187-57200
PMID28915664
show ga
Morusin is a pure extract from the root bark of Morus australis (Moraceae). In
recent years, morusin has been reported to exhibit anti-tumor biological activity
in some types of human cancers through different mechanisms. Here, we attempted
to investigate the inhibitory effect and mechanism of morusin on gastric cancer.
Morusin markedly inhibited gastric cancer cell proliferation by down-regulating
CDKs and Cyclins, such as CDK2, CDK4, Cyclin D1 and Cyclin E1. Additionally,
morusin suppressed tumor growth in vitro and in vivo. Up-regulation of CDKs and
Cyclins in gastric cancer cells was induced by c-Myc binding at the E-Box regions
of CDKs and the Cyclin promoter. In addition, compared with the control group,
the morusin-treated group showed reduced expression of c-Myc and c-Myc protein
binding at the E-Box regions. Based on these results, we overexpressed c-Myc in
gastric cancer cells and found that overexpressing c-Myc rescued morusin-induced
inhibition of cell proliferation and tumor growth. These results suggest that
morusin inhibits cell proliferation and tumor growth by down-regulating c-Myc in
human gastric cancer.