Open AccessEffects of siRNA-mediated silencing of Bmi-1 gene expression on proliferation of gastric cancer cells
Author(s) -
Guo Ying,
Zhang Li,
Zhou Guangyu,
Ma Qingjie,
Gao Shi,
Zhao Yue
Publication year - 2019
Publication title -
european journal of inflammation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.219
H-Index - 20
eISSN - 2058-7392
pISSN - 1721-727X
DOI - 10.1177/2058739219845534
Subject(s) - apoptosis , gene silencing , flow cytometry , transfection , cell cycle , cell growth , cell , cancer , microbiology and biotechnology , biology , cancer research , cancer cell , chemistry , cell culture , gene , genetics
This study was designed to investigate the effects of siRNA-mediated silencing of Bmi-1 gene expression on proliferation of AGS gastric cancer cell. siRNA Bmi-1 was transfected into human AGS gastric cancer cells by liposome (as siRNA Bmi-1 group) with negative control (as control group); the expressions of Bmi-1 and apoptosis-related genes like P21, Bax, and Bcl-2 in AGS cells were determined by Western blot method; the apoptosis of AGS cells was detected by flow cytometry double staining and Hoechst staining; and cell cycle was measured by flow cytometry. Compared with the control group, the expression of Bmi-1 in the siRNA Bmi-1 group was significantly decreased ( P < 0.05), the apoptosis rate was increased ( P < 0.05), and cell cycles were arrested at G1 phase (P < 0.05); the expression level of P21 and Bax in cells was significantly up-regulated while that of Bcl-2 down-regulated ( P < 0.05). The down regulation of Bmi-1 can inhibit the proliferation of AGS gastric cancer cell and promote its apoptosis, which takes such effects mainly by up-regulating P21 as well as Bax and down-regulating Bcl-2.
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