Mechanism of siRNA-mediated MAGE-3 silencing on intestinal flora,gastric mucosal PTEN expression and liver metastasis in rats with gastric cancer based on MAPK/ERK signaling pathway
10.12360/CPB202406085
- VernacularTitle:基于MAPK/ERK信号通路探讨siRNA介导MAGE-3沉默对胃癌大鼠肠道菌群、胃黏膜PTEN表达及肝转移的作用机制
- Author:
Shuai ZHANG
1
;
Liang-liang LIU
;
Yi-feng ZHAO
;
Ru SHENG
;
Shu-guang LI
Author Information
1. 河北北方学院附属第一医院胃肠肿瘤科
- Publication Type:Journal Article
- Keywords:
MAPK/ERK signaling pathway;
MAGE-3;
gastric cancer;
intestinal flora;
PTEN;
liver metastasis
- From:
Chinese Pharmacological Bulletin
2025;41(3):508-514
- CountryChina
- Language:Chinese
-
Abstract:
Aim To explore the mechanism of the effect of siRNA-mediated MAGE-3 silencing on intesti-nal flora,gastric mucosal PTEN expression and liver metastasis in rats with gastric cancer based on MAPK/ERK signaling pathway.Methods Thirty rats were randomly divided into the normal(CO)group,model(MO)group,and MAGE-3 silenced(SM)group,with 10 rats in each group.The model of MO group and SM group was established by MNNG gavage meth-od.After successful modeling,the SM group was intri-toneally injected with 20 μg·kg-1 shRNA MAGE-3 lentiviral vector.The number of intestinal flora in rats was detected by selective medium of intestinal flora,the expression of PTEN in gastric mucosa was detected by immunohistochemistry,liver metastasis was detected by HE staining,and the protein expression of MAPK/ERK signaling pathway was detected by Western blot.The regulatory effect of siRNA-mediated MAGE-3 si-lencing on MAPK/ERK signaling pathway was verified in vitro.Results Compared with CO group,the con-tents of Enterococcus and Escherichia coli,the protein expressions of P-MEK1,P-ERK1 and P-ELK1 in MO group increased(P＜0.05),while the contents of Lactobacillus and Bifidobacterium and the expression of PTEN decreased(P＜0.05).In SM group,the con-tents ofEnterococcus,Escherichiacoli,P-MEK1,P-ERK1 and P-ELK1 protein expressions decreased(P＜0.05),while the contents of Lactobacillus,Bifidobac-terium and PTEN expression increased(P＜0.05).Compared with group CO,the protein expressions of P-MEK1,p-ERK1 and P-ELK1 in group MO were not significantly different(P＞0.05),while the protein expressions of P-MEK1,p-ERK1 and P-ELK1 in group SM were reduced compared with group MO(P＜0.05).Conclusions siRNA-mediated MAGE-3 si-lencing can significantly improve intestinal flora,pro-mote the expression of PTEN in gastric mucosa,and inhibit liver metastasis in rats with gastric cancer.The mechanism may be related to the inhibition of MAPK/ERK signaling pathway.
