LIU Yaqing,LIU Bin,MA Xuran,et al.Anti-inflammatory Effect of Huangqintang on LPS-induced RAW264.7 Inflammatory Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):20-28.
LIU Yaqing,LIU Bin,MA Xuran,et al.Anti-inflammatory Effect of Huangqintang on LPS-induced RAW264.7 Inflammatory Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):20-28. DOI: 10.13422/j.cnki.syfjx.20221704.
Anti-inflammatory Effect of Huangqintang on LPS-induced RAW264.7 Inflammatory Cells
B p65)抑制剂(PDTC)组、p38丝裂原活化蛋白激酶(p38 MAPK)抑制剂(SB203580)组、细胞外信号调节激酶(ERK)抑制剂(PD98059)组、c-Jun氨基末端激酶(JNK)抑制剂(SP600125)组、Janus酪氨酸蛋白激酶(JAK)抑制剂(AG490)组,先后加入相应的抑制剂和黄芩汤,并经LPS刺激后,提取RNA和蛋白,分别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)检测NF-
κ
B p65、p38 MAPK、ERK、JNK和JAK mRNA及蛋白的表达水平,探究黄芩汤通过调控NF-
To explore the anti-inflammatory mechanism of Huangqintang based on the inflammation model in RAW264.7 cells.
Method
2
Huangqintang was prepared and the safe dose to RAW264.7 cells was screened out. The RAW264.7 cells were seeded in 24-well plates and incubated with Huangqintang and lipopolysaccharide (LPS), successively. The concentrations of nitric oxide (NO), interleukin (IL)-6, tumor necrosis factor (TNF)-
α
, and prostaglandin E
2
(PGE
2
) were measured by Griess assay and enzyme-linked immunosorbent assay (ELISA), respectively. Meanwhile, RAW264.7 cells were inoculated in 6-well plates, and normal group, LPS group, LPS+Huangqintang group, nuclear factor-
κ
B (NF-
κ
B) p65 inhibitor PDTC group, p38 mitogen-activated protein kinase (MAPK) inhibitor SB203580 group, extracellular signal-regulated kinase (ERK) inhibitor PD98059 group, c-Jun N-terminal kinase (JNK) inhibitor SP600125 group, and Janus kinase (JAK) inhibitor AG490 group were set up. After the cells were incubated with corresponding inhibitors and Huangqintang and stimulated by LPS, RNA and protein were extracted. The mRNA and protein expression levels of NF-
κ
B p65, p38 MAPK, ERK, JNK, and JAK were detected by Real-time fluorescence-based quantitative polymerase chain reaction (Real-time PCR) and Western blot, respectively, to explore the anti-inflammatory mechanism of Huangqintang by regulating the NF-
κ
B, MAPK, and JAK/signal transducer and activator of transcription protein (STAT) signaling pathways.
Result
2
After stimulation with LPS, the concentrations of NO, IL-6, TNF-
α
, and PGE
2
in the cells of the model group increased significantly(
P
<
0.05,
P
<
0.01). Compare with the model group, after incubation with Huangqintang, the secretion of NO, IL-6, TNF-
α
, and PGE
2
showed a downward trend (
P
<
0.05,
P
<
0.01). Compared with the normal group, the model group showed increased mRNA expression of p38 MAPK, ERK, JNK, JAK, and NF-
κ
B p65 and total protein expression in cells after stimulation with LPS (
P
<
0.05,
P
<
0.01). Compare with the model group,after incubation with Huangqintang, the total protein and mRNA expression of p38 MAPK, ERK, JNK, JAK, and NF-
κ
B p65 in inflammatory cells decreased (
P
<
0.05,
P
<
0.01). Meanwhile, the expression of NF-
κ
B p65 total protein and mRNA in each inhibitor group showed a downward trend (
P
<
0.05,
P
<
0.01).
Conclusion
2
Huangqintang can inhibit the inflammatory response through the NF-
MA X,WANG D,FENG X,et al.Huangqin tang interference with colitis associated colorectal cancer through regulation of epithelial mesenchymal transition and cell cycle[J].Front Pharmacol,2022,13:837217.
MEDZHITOV R.Origin and physiological roles of inflammation[J].Nature,2008,454(7203):428-435.
MONJE M L,TODA H,PALMER T D.Inflammatory blockade restores adult hippocampal neurogenesis[J].Science,2003,302(5651):1760-1765.
ZHANG W J,WEI H,HAGEN T,et al.Alpha-lipoic acid attenuates LPS-induced inflammatory responses by activating the phosphoinositide 3-kinase/Akt signaling pathway[J].Proc Natl Acad Sci U S A,2007,104(10):4077-4082.
DI LORENZO F,DE CASTRO C,SILIPO A,et al.Lipopolysaccharide structures of Gram-negative populations in the gut microbiota and effects on host interactions[J].FEMS Microbiol Rev,2019,43(3):257-272.
ARANGO DUQUE G,DESCOTEAUX A.Macrophage cytokines: Involvement in immunity and infectious diseases[J].Front Immunol,2014,5:491.
BANSKOTA S,WANG H,KWON Y H,et al.Salicylates ameliorate intestinal inflammation by activating macrophage AMPK[J].Inflamm Bowel Dis,2021,27(6):914-926.