泰山磐石散调控KEAP1/NRF2/FoxO3信号通路抑制滋养层细胞氧化应激损伤的作用机制OA

Objective:To explore the effect and mechanism of Taishan Panshi powder(TSPSP)on inhibiting oxidative stress injury in human chorionic trophoblast cells(HTR-8/SVneo),and to uelucidate the underlying mechanism of TSPSP in the treatment of spontaneous abortion(SA).Methods:Gene differential analysis of SA was performed using the Gene Expression Omnibus(GEO)database and correlated with oxidative stress.Network pharmacology was employed to screen the active components of TSPSP,and a"Chinese medicine-component-target-disease"network was constructed to predict the mechanism of action of TSPSP.For in vitro validation experiments,HTR-8/SVneo cells were divided into blank group,model group,TSPSP-containing serum 2.5％,5％,10％groups,and nuclear factor E2-related factor 2(Nrf2)inhibitor group(ML385,30 μmol·L-1).Except for the blank group,other groups were stimulated with 150 μmol·L-1 H2O2 for 3 h to establish a cell oxidative stress injury model.After successful modeling,the blank group and model group were given 10％blank serum,each TSPSP-containing serum group was treated with the corresponding concentration of drug-containing serum,and the Nrf2 inhibitor group was additionally given 30 μmol·L-1 ML385 on the basis of 10％TSPSP-containing serum.All groups of cells were continuously cultured under the above conditions for 24 h,and then samples were collected for subsequent detection.Cell viability in each group was detected by CCK-8 assay.Cell migration rate was detected by scratch test.The contents of malondialdehyde(MDA),Fe2+,and Glutathione(GSH)were detected by enzyme-linked immunosorbent assay(ELISA).Intracellular reactive oxygen species(ROS)level was detected by a fluorescent probe(DCF-DA).The protein and mRNA expression levels of Kelch-like ECH-associated protein 1(KEAP1),Nrf2,and forkhead box protein O3(FoxO3)in cells were detected by immunofluorescence(IF)and real-time quantitative polymerase chain reaction(Real-time PCR).The protein expression levels of KEAP1,Nrf2,FoxO3,Glutathione peroxidase 4(GPX4),and superoxide dismutase(SOD)in cells were detected by Western blot.Results:The GSE76862 and GSE22490 datasets were obtained from the GEO database.Differential gene analyses showed that the KEAP1,Nrf2,and FoxO3 genes were all associated with the disease.After matching with the oxidative stress pathway,nine significantly differential pathways were identified(P＜0.05),among which three contained the target genes Nrf2 and FoxO3.A total of 246 active ingredient targets of TSPSP and 2 804 SA-related targets were obtained through network pharmacology,and 154 potential action targets were obtained after taking the intersection.Topological analysis showed that targets such as KEAP1 and Nrf2 exhibited high degree values.GO and KEGG enrichment analyses indicated that the intersection targets were mainly involved in oxidative stress response,FOXO and MAPK signaling pathways,etc.In in vitro experiments,compared with the blank group,the cell viability in the model group was significantly decreased(P＜0.01).Compared with the model group,the cell viability in each TSPSP-containing serum group was significantly increased(P＜0.01).Compared with the 10％TSPSP-containing serum group,the cell viability in the ML385 group decreased to approximately 70％(P＜0.01).Compared with the blank group,the model group showed significantly increased contents of MDA,Fe2+,and ROS,decreased GSH expression(P＜0.01),significantly reduced cell migration rate(P＜0.01),and increased protein and mRNA expression levels of KEAP1 and FoxO3(P＜0.01),while decreased protein and mRNA expression levels of Nrf2,GPX4,and SOD(P＜0.01).Compared with the model group,each TSPSP-containing serum group showed significantly decreased contents of MDA,Fe2+,and ROS,increased GSH expression(P＜0.01),significantly increased migration rate(P＜0.01),significantly decreased protein and mRNA expression levels of KEAP1 and FoxO3(P＜0.05,P＜0.01),and significantly increased protein and mRNA expression levels ofNrf2,GPX4,and SOD(P＜0.05,P＜0.01).Compared with the 10％TSPSP-containing serum group,the ML385 group showed reversed trends in all indicators(P＜0.05,P＜0.01).Conclusion:TSPSP can inhibit H2O2-induced oxidative stress injury of trophoblast cells,and its mechanism of action may be related to the drug activating the KEAP1/Nrf2/FoxO3 signaling pathway.