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1.中国中医科学院 中药研究所,北京 100700
2.黑龙江中医药大学,哈尔滨 150040
冯雪,博士,助理研究员,从事中药药理学、中药新药及保健食品研发,E-mail:15227180242@163.com
杨伟鹏,博士,研究员,博士生导师,从事中药药理学研究,E-mail:wpyang@icmm.ac.cn
收稿日期:2022-09-05,
网络出版日期:2023-01-06,
纸质出版日期:2023-04-05
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冯雪,刘雅清,刘滨等.黄芩汤通过Nrf2信号通路对Caco-2细胞抗氧化应激作用的机制[J].中国实验方剂学杂志,2023,29(07):29-37.
FENG Xue,LIU Yaqing,LIU Bin,et al.Anti-oxidative Stress Effect and Mechanism of Huangqintang on Caco-2 Cells Through Nrf2 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):29-37.
冯雪,刘雅清,刘滨等.黄芩汤通过Nrf2信号通路对Caco-2细胞抗氧化应激作用的机制[J].中国实验方剂学杂志,2023,29(07):29-37. DOI: 10.13422/j.cnki.syfjx.20230205.
FENG Xue,LIU Yaqing,LIU Bin,et al.Anti-oxidative Stress Effect and Mechanism of Huangqintang on Caco-2 Cells Through Nrf2 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):29-37. DOI: 10.13422/j.cnki.syfjx.20230205.
目的
2
以Caco-2细胞为载体,结合基因干扰(RNAi)技术,通过体外实验进一步验证黄芩汤基于核因子E
2
相关因子2(Nrf2)通路发挥的抗氧化应激作用。
方法
2
将处于对数生长期的Caco-2细胞,经siRNA转染,构建siRNA Caco-2细胞;将正常Caco-2细胞和siRNA Caco-2细胞与不同浓度的黄芩汤共同孵育后,提取RNA和蛋白,采用实时荧光定量聚合酶链式反应(Real-time PCR)和蛋白免疫印迹法(Western blot)技术检测血红素氧合酶-1(HO-1)、醌氧化还原酶1(NQO1)、谷胱甘肽巯基转移酶(GST)、接头蛋白Kelch样ECH相关蛋白1(Keap1)及Nrf2 mRNA和蛋白的表达;同时,采用比色法和探针法检测各组细胞中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)的活力及丙二醛(MDA)、活性氧(ROS)的表达水平。
结果
2
与空白组比较,仅有黄芩汤400 mg·L
-1
组与萝卜硫素(SFN)组可降低正常Caco-2细胞内ROS、MDA含量(
P
<
0.01);而黄芩汤各剂量组与SFN组细胞内SOD与GSH-Px活力均有增加的趋势,且黄芩汤400 mg·L
-1
组和SFN组与空白组比较差异有显著统计学意义(
P
<
0.01);同时,各组细胞HO-1、GST、Keap1、NQO1和Nrf2蛋白及mRNA的表达量均有明显升高的趋势(
P
<
0.05,
P
<
0.01)。经转染后,与空白组比较,模型组细胞内MDA和ROS的含量升高,而GSH-Px和SOD的活力及HO-1、GST、Keap1和NQO1蛋白及mRNA的表达量均有不同程度地降低(
P
<
0.05,
P
<
0.01),与药物孵育后,与模型组比较,SFN组细胞内SOD活力和SFN组、黄芩汤各给药组GSH-Px活力显著升高(
P
<
0.01),黄芩汤400 mg·L
-1
组、200 mg·L
-1
组和SFN组细胞内SOD和GSH-Px活力均有升高的趋势(
P
<
0.01),黄芩汤400 mg·L
-1
组和SFN组MDA有降低的趋势,且各给药组ROS均有降低(
P
<
0.01);HO-1、GST、Keap1、NQO1和Nrf2的蛋白及mRNA表达均有不同程度增加(
P
<
0.05,
P
<
0.01)。
结论
2
黄芩汤可以通过调控Nrf2通路发挥抗氧化应激的作用。
Objective
2
To verify the anti-oxidative stress effect of Huangqintang based on the nuclear factor E
2
-related factor 2 (Nrf2) signaling pathway by using Caco-2 cells as a carrier and RNA interference (RNAi) technology with
in vitro
experiments.
Method
2
The Caco-2 cells in the logarithmic growth phase were transfected with siRNA to construct siRNA Caco-2 cells. After normal Caco-2 cells and siRNA Caco-2 cells were incubated with Huangqintang of different doses, RNA and protein were extracted. Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) and Western blot were used to detect the mRNA and protein expression of heme oxygenase-1 (HO-1), NAD(P)H quinone oxidoreductase 1 (NQO1), glutathione S-transferase (GST), Kelch-like ECH-associated protein 1 (Keap1), and Nrf2. Meanwhile, the activities of superoxide dismutase (SOD) and GSH-Px, as well as the expression levels of malondialdehyde (MDA) and reactive oxygen species (ROS), were detected by the colorimetric method and the probe method.
Result
2
Compared with the results in the normal group, only the 400 mg·L
-1
Huangqintang group and the sulforaphane (SFN) group could reduce the content of ROS and MDA in Caco-2 cells (
P
<
0.01), while the activities of SOD and GSH-Px in the cells of the Huangqintang groups and the SFN group showed an upward trend. Furthermore, there were significant differences in the 400 mg·L
-1
Huangqintang group/the SFN group and the normal group (
P
<
0.01). Meanwhile, the protein and mRNA expression levels of HO-1, GST, Keap1, NQO1, and Nrf2 showed an upward trend in all groups (
P
<
0.05,
P
<
0.01). After transfection, compared with the normal group, the model group showed increased content of MDA and ROS, blunted activities of GSH-Px and SOD, and reduced protein and mRNA expression of HO-1, GST, Keap1, and NQO1 (
P
<
0.05,
P
<
0.01). After drug incubation, compared with the model group, the SFN group showed potentiated SOD activity, and the SFN group and the Huangqintang groups showed enhanced GSH-Px activity (
P
<
0.01). Moreover, the activities of SOD and GSH-Px in the 400 and 200 mg·L
-1
Huangqintang groups and the SFN group showed an upward trend (
P
<
0.01), and the content of MDA in the 400 mg·L
-1
Huangqintang group and the SFN group showed a downward trend. ROS decreased in all groups with drug intervention (
P
<
0.01), and the protein and mRNA expression of HO-1, GST, Keap1, NQO1, and Nrf2 increased to varying degrees (
P
<
0.05,
P
<
0.01).
Conclusion
2
Huangqintang can play an anti-oxidative stress role by regulating the Nrf2 pathway.
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