首页|Anti-inflammatory and DNA Repair Effects of Astragaloside Ⅳ on PC 12 Cells Damaged by Lipopolysaccharide
Anti-inflammatory and DNA Repair Effects of Astragaloside Ⅳ on PC 12 Cells Damaged by Lipopolysaccharide
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Objective:This study aimed to establish a neural cell injury model in vitro by stimulating PC12 cells with lipopolysaccharide(LPS)and to examine the effects of astragaloside Ⅳ on key targets using high-throughput sequence technology and bioinformatics analyses.Methods:PC12 cells in the logarithmic growth phase were treated with LPS at final concentrations of 0.25,0.5,0.75,1,and 1.25 mg/mL for 24 h.Cell morphology was evaluated,and cell survival rates were calculated.A neurocyte inflammatory model was established with LPS treatment,which reached a 50％cell survival rate.PC12 cells were treated with 0.01,0.1,1,10,or 100 μmol/L astragaloside Ⅳ for 24 h.The concentration of astragaloside Ⅳ that did not affect the cell survival rate was selected as the treatment group for subsequent experiments.NOS activity was detected by colorimetry;the expression levels of ERCC2,XRCC4,XRCC2,TNF-α,IL-1β,TLR4,NOS and COX-2 mRNA and protein were detected by RT-qPCR and Western blotting.The differentially expressed genes(DEGs)between the groups were screened using a second-generation sequence(fold change＞2,P＜0.05)with the following KEGG enrichment analysis,RT-qPCR and Western blotting were used to detect the mRNA and protein expression of DEGs related to the IL-17 pathway in different groups of PC12 cells.Results:The viability of PC12 cells was not altered by treatment with 0.01,0.1,or 1 μmol/L astragaloside Ⅳ for 24 h(P＞0.05).However,after treatment with 0.5,0.75,1,or 1.25 mg/mL LPS for 24 h,the viability steadily decreased(P＜0.01).The mRNA and protein expression levels of ERCC2,XRCC4,XRCC2,TNF-α,IL-1β,TLR4,NOS,and COX-2 were significantly increased after PC12 cells were treated with 1 mg/mL LPS for 24 h(P＜0.01);however,these changes were reversed when PC12 cells were pretreated with 0.01,0.1,or 1 μmol/L astragaloside Ⅳ in PC12 cells and then treated with 1 mg/mL LPS for 24 h(P＜0.05).Second-generation sequencing revealed that 1026 genes were upregulated,while 1287 genes were downregulated.The DEGs were associated with autophagy,TNF-α,interleukin-17,MAPK,P53,Toll-like receptor,and NOD-like receptor signaling pathways.Furthermore,PC12 cells treated with a 1 mg/mL LPS for 24 h exhibited increased mRNA and protein expression of CCL2,CCL11,CCL7,MMP3,and MMP10,which arc associated with the IL-17 pathway.RT-qPCR and Western blotting analyses confirmed that the DEGs listed above corresponded to the sequence assay results.Conclusion:LPS can damage PC12 cells and cause inflammatory reactions in nerve cells and DNA damage.astragaloside Ⅳ plays an anti-inflammatory and DNA damage protective role and inhibits the IL-17 signaling pathway to exert a neuroprotective effect in vitro.
Department of Geriatrics,The Affiliated Hospital of Gansu University of Chinese Medicine,Lanzhou 730000,China
Key Laboratory for Mining,Innovation and Transformation of Traditional Chinese Medicine in Gansu Province and the New Product Creation Engineering Laboratory of Traditional Chinese Medicine in Gansu Province,Lanzhou 730000,China
Department of Neurology,the First People's Hospital of Lanzhou,Gansu 730000,China
School of Public Health,Gansu University of Chinese Medicine,Lanzhou 730000,China
People's Hospital of Gansu Province,Lanzhou 730000,China
Scientific Research and Experimental Center,Gansu University of Chinese Medicine,Lanzhou 730000,China
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Open Project of Gansu Traditional Chinese Medicine Research CenterGansu Province Youth Science and Technology Foundation ProgramGansu Province Higher Education ResearchGansu Province Higher Education Research
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