YUAN Xiaolong,WEI Zheng,ZHANG Junping,et al.Baicalin Induces Ferroptosis in Gastric Cancer Cells via p53-mediated SLC7A11 Down-regulation[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(06):71-78.
YUAN Xiaolong,WEI Zheng,ZHANG Junping,et al.Baicalin Induces Ferroptosis in Gastric Cancer Cells via p53-mediated SLC7A11 Down-regulation[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(06):71-78. DOI: 10.13422/j.cnki.syfjx.202202122.
Baicalin Induces Ferroptosis in Gastric Cancer Cells via p53-mediated SLC7A11 Down-regulation
To explore the inhibitory effect of different concentration of baicalin (0, 100, 200, 400 μmol·L
-1
) on the proliferation of human gastric cancer SGC-7901 cells and the underlying mechanism.
Method
2
SGC-7901 cells were treated with baicalin. Then methyl thiazolyl tetrazolium (MTT) assay was employed to examine the inhibitory effect of baicalin on the cells. At the same time, ferrostatin-1 (Fer-1) was added to observe the viability of cells after baicalin treatment. The expression of ferroptosis-related genes was detected by Real-time polymerase chain reaction (Real-time PCR) and Western blot. The content of malondialdehyde (MDA) and the level of glutathione (GSH) were detected respectively by MTT assay and enzyme-linked immunosorbent assay. The role of tumor protein 53 (p53)/solute carrier family 7 member 11 (SLC7A11) pathway in the regulation of ferroptosis was investigated respectively via overexpression and small interfering RNA (siRNA) methods.
Result
2
Compared with the blank group, baicalin decreased the viability of SGC-7901 (
P
<
0.05,
P
<
0.01) in a dose- and time-dependent manner. The intervention of Fer-1 significantly alleviated the decrease of SGC-7901 cell viability caused by baicalin (
P
<
0.01). In addition, compared with the baicalin group, Fer-1+baicalin group showed decrease in MDA content and the mRNA and protein levels of prostaglandin-endoperoxide synthase 2 (PTGS2) in the cells (
P
<
0.01), and increase in GSH activity and mRNA and protein levels of glutathione peroxidase 4 (GPX4) (
P
<
0.01). The protein level of SLC7A11 in the baicalin group was decreased compared with that in the blank group (
P
<
0.05,
P
<
0.01) in a dose-dependent manner. Compared with the baicalin group, the reactive oxygen species (ROS) level and MDA content in SLC7A11-overexpressing cells were significantly decreased after baicalin treatment (
P
<
0.01), and the GSH activity was significantly increased (
P
<
0.01). The fluorescence intensity of p53 in the cells of the baicalin group was increased compared with that of the blank group (
P
<
0.01). Compared with the baicalin group, the expression level of p53 protein in the cells transfected with p53 siRNA was significantly decreased after baicalin treatment (
P
<
0.01), and the expression level of SLC7A11 was significantly increased (
P
<
0.01).
Conclusion
2
Baicalin can effectively inhibit the proliferation of SGC-7901 cells by regulating p53/SLC7A11-mediated ferroptosis.
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