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.
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.
Anti-oxidative Stress Effect and Mechanism of Huangqintang on Caco-2 Cells Through Nrf2 Signaling Pathway
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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