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1.山东中医药大学 中医学院,济南 250355
2.山东中医药大学 实验中心,济南 250355
3.山东中医药大学 康复学院,济南 250355
Received:18 March 2023,
Published Online:19 June 2023,
Published:20 March 2024
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李灵,李亚星,王雪等.基于Nrf2/GPX4信号通路探讨半夏泻心汤诱导胃癌细胞铁死亡的机制[J].中国实验方剂学杂志,2024,30(06):10-19.
LI Ling,LI Yaxing,WANG Xue,et al.Mechanism on Banxia Xiexintang Inducing Ferroptosis in Gastric Cancer Cells Based on Nrf2/GPX4 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(06):10-19.
李灵,李亚星,王雪等.基于Nrf2/GPX4信号通路探讨半夏泻心汤诱导胃癌细胞铁死亡的机制[J].中国实验方剂学杂志,2024,30(06):10-19. DOI: 10.13422/j.cnki.syfjx.20231424.
LI Ling,LI Yaxing,WANG Xue,et al.Mechanism on Banxia Xiexintang Inducing Ferroptosis in Gastric Cancer Cells Based on Nrf2/GPX4 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(06):10-19. DOI: 10.13422/j.cnki.syfjx.20231424.
目的
2
观察半夏泻心汤(BXT)对人胃癌 HGC-27、MKN-45、AGS细胞增殖的影响及其作用机制。
方法
2
采用细胞增殖与活性检测法(CCK-8)检测不同浓度的BXT含药血清(5%、10%、20%)对HGC-27、MKN-45、AGS细胞增殖的影响;线粒体膜电位探针(TMRE)检测细胞内线粒体膜电位表达,采用试剂盒对铁离子(Fe
2+
)含量、脂质过氧化物(LPO)与超氧化物歧化酶(SOD)活性进行检测,采用蛋白免疫印迹法(Western blot)检测糖原合成激酶3
β
(GSK3
β
)、磷酸化GSK3
β
(p-GSK3
β
)、核转录因子E
2
相关因子2(Nrf2)和谷胱甘肽过氧化物酶4(GPX4)的蛋白表达水平,实时荧光定量聚合酶链式反应(Real-time PCR)检测胱氨酸/谷氨酸逆向转运蛋白溶质载体家族7成员11(SLC7A11)、重链溶质载体家族3成员2(SLC3A2)、转铁蛋白受体3(TFRC)和肿瘤蛋白P53(TP53) mRNA表达。
结果
2
CCK-8结果显示含药血清干预3种胃癌细胞24 h,与空白组比较,BXT组与卡培他滨组均可显著降低胃癌细胞存活率(
P
<
0.01);含药血清干预胃癌细胞48 h,与空白组比较,卡培他滨组与BXT组均可明显降低3种胃癌细胞存活率,BXT组呈现剂量依赖,以20%效果最明显(
P
<
0.01)。在铁死亡生化指标方面,与空白组比较,BXT组与卡培他滨组可以显著降低胃癌细胞中线粒体膜电位表达、SOD活性(
P
<
0.01),显著提高LPO、Fe
2+
的含量(
P
<
0.01),从而提高胃癌细胞对铁死亡的敏感。在Nrf2/GPX4通路方面,与空白组比较,BXT组可以通过降低胃癌细胞中p-GSK3
β
、Nrf2、GPX4蛋白表达(
P
<
0.01),提高SLC7A11、SLC3A2 mRNA表达(
P
<
0.05),提高胃癌细胞中GSK3
β
的蛋白表达(
P
<
0.01),提高TP53、TFRC mRNA表达(
P
<
0.05,
P
<
0.01),抑制Nrf2/GPX4通路诱导胃癌细胞发生铁死亡。与卡培他滨组比较,20% BXT组效果更为明显。
结论
2
半夏泻心汤可以通过抑制Nrf2/GPX4通路的诱导胃癌细胞HGC-27、MKN-45、AGS发生铁死亡。
Objective
2
To observe the effect of Banxia Xiexintang (BXT) on the proliferation of human gastric cancer HGC-27, MKN-45, and AGS cells and its mechanism.
Method
2
Cell counting kit-8 (CCK-8) was used to detect the effects of different concentrations of BXT-containing serum (5%, 10%, and 20%) on the proliferation of HGC-27, MKN-45, and AGS cells. A mitochondrial membrane potential probe (TMRE) was used to detect the expression of mitochondrial membrane potential in cells. A kit was used to detect iron ion (Fe
2+
)
content, lipid peroxide (LPO), and superoxide dismutase (SOD) activity. Western blot was used to detect the protein expression levels of glycogen synthase3
β
(GSK3
β
), phosphorylated GSK3
β
(p-GSK3
β
), nuclear factor E
2
related factor 2 (Nrf2), and glutathione peroxidase 4 (GPX4). The real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to detect the mRNA expression of member 11 of the cystine/glutamic acid reverse transporter solute vector family 7 (SLC7A11), member 2 of the heavy chain solute vector family 3 (SLC3A2), transferrin receptor 3 (TFRC), and tumor protein (TP)53.
Result
2
CCK-8 results showed that BXT and capecitabine could significantly reduce the survival rate of three kinds of gastric cancer cells after treatment with drug-containing serum for 24 h (
P
<
0.01). After 48 h of intervention with drug-containing serum, the survival rate of three kinds of gastric cancer cells was significantly decreased in both the capecitabine group and the BXT group compared with the blank group. The BXT group was dose-dependent, with 20% BXT having the most significant effect (
P
<
0.01). In terms of biochemical indicators of ferroptosis, compared with the blank group, BXT and capecitabine significantly decreased the expression of mitochondrial membrane potential (
P
<
0.01) and SOD activity (
P
<
0.01) and significantly increased the contents of LPO and Fe
2+
(
P
<
0.01), so as to improve the sensitivity of gastric cancer cells to ferroptosis. In terms of the Nrf2/GPX4 pathway, compared with the blank group, the BXT group could reduce the protein expressions of p-GSK3
β
, Nrf2, and GPX4 (
P
<
0.01) in gastric cancer cells and increase mRNA expressions of SLC7A11 and SLC3A2 (
P
<
0.05). It could also increase the protein expression of GSK3
β
(
P
<
0.01) and mRNA expression of TP53 and TFRC (
P
<
0.05,
P
<
0.01) in gastric cancer cells. Inhibition of the Nrf2/GPX4 pathway induces ferroptosis in gastric cancer cells. Compared with the capecitabine group, the 20% BXT group showed a more obvious effect.
Conclusion
2
Banxia Xiexintang can induce ferroptosis in gastric cancer cells HGC-27, MKN-45, and AGS by inhibiting the Nrf2/GPX4 pathway.
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