Compatibility Advantage of Scutellariae Radix-Coptidis Rhizoma for Anti-neuroinflammation and Its Potential Targets for Regulating TLR4/MyD88/NF-κB Signaling Pathway
10.13422/j.cnki.syfjx.20222138
- VernacularTitle:黄芩-黄连抗神经炎症的配伍优势及其调控TLR4/MyD88/NF-κB信号通路的潜在靶点
- Author:
Hongjie ZHANG
1
;
Dan SU
1
;
Genhua ZHU
1
;
Yonggui SONG
1
;
Bugao ZHOU
1
;
Shanshan LI
1
;
Changhua ZHANG
1
;
Zhifu AI
1
Author Information
1. Jiangxi Provincial Key Laboratory of Traditional Chinese Medicine（TCM）for Prevention and Treatment of Brain Diseases with Cognitive Dysfunction， Key Laboratory of Depression Animal Model Based on TCM Syndrome of Jiangxi Administration of TCM， Key Research Office for Evaluation of TCM Efficacy （Prevention and Treatment of Mental Disorders and Brain Diseases） of Jiangxi Administration of TCM， Institute of Brain Science of Chinese Medicine， Jiangxi University of Chinese Medicine， Nanchang 330006， China
- Publication Type:Journal Article
- Keywords:
Scutellariae Radix-Coptidis Rhizoma;
compatibility advantage;
Toll like receptor/myeloid differentiation factor 88/nuclear factor kappaB （TLR4/MyD88/NF-κB）;
neuroinflammation;
mouse microglia cells （BV2）
- From:
Chinese Journal of Experimental Traditional Medical Formulae
2022;28(22):58-67
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo explore the compatibility advantage of Scutellariae Radix-Coptidis Rhizoma in the prevention and treatment of neuroinflammation， and to elucidate the action characteristics and mechanism of the compatibility advantage based on Toll like receptor （TLR4）/myeloid differentiation factor 88 （MyD88）/nuclear factor kappaB （NF-κB） pathway. MethodRepresentative mouse microglia cells （BV2） in vitro were selected and divided into 8 groups： control group， model group， Scutellariae Radix-Coptidis Rhizoma group， Piracetam group， Scutellariae Radix group and Coptidis Rhizoma group. The BV2 cell inflammatory model was established by lipopolysaccharide （LPS）， and the cell activity was detected by cell counting kit-8 （CCK-8）. Cell morphology was observed under bright field. The production and release of pro-inflammatory factors in BV2 cells were determined by enzyme-linked immunosorbent assay （ELISA） and immunofluorescence assay， and the mRNA expressions of TLR4， MyD88 and NF-κB were detected by Real-time fluorescence quantitative polymerase chain reaction （Real-time PCR）. The nuclear translocation of NF-κB p65 was detected by immunofluorescence， and TLR4 signal transduction inhibitor （CLI-095） and NF-κB inhibitor （PDTC） were used to confirm the anti-neuroinflammation targets of Scutellariae Radix-Coptidis Rhizoma. ResultCompared with the conditions in the control group， most cells in LPS-induced model group were activated， and the contents of IL-6， TNF-α and IL-1β in culture medium and cells and the mRNA expressions of TLR4， MyD88， NF-κB p50 and NF-κB p65 were increased （P<0.01）， with obvious nuclear entry of NF-κB p65. Compared with the conditions in the model group， BV2 cell morphology was mostly recovered after pretreatment in Scutellariae Radix-Coptidis Rhizoma and Piracetam groups， and the levels of IL-6， TNF-α and IL-1β and the mRNA expressions of TLR4， MyD88， NF-κB p50 and NF-κB p65 were decreased （P<0.05， P<0.01）， with NF-κB p65 mostly observed in cytoplasm. Compared with the conditions in the model group， cell morphology was slightly recovered in Scutellariae Radix group and Coptidis Rhizoma group， and the levels of pro-inflammatory factors and mRNA expressions of TLR4， MyD88， NF-κB p50 and NF-κB p65 were reduced. In terms of inhibitory effect on pro-inflammatory factors， Scutellariae Radix group and Coptidis Rhizoma group were lower than Scutellariae Radix-Coptidis Rhizoma group （P<0.05）. Compared with the model group， the "Scutellariae Radix-Coptidis Rhizoma+CLI-095" group and "Scutellariae Radix-Coptidis Rhizoma+PDTC" group had lowered mRNA expressions of TLR4， MyD88， NF-κB p50 and NF-κB p65 （P<0.05， P<0.01）， and the transfer of NF-κB p65 into nucleus was obviously inhibited. ConclusionThe anti-neuroinflammation effect of Scutellariae Radix-Coptidis Rhizoma was significantly better than Scutellariae Radix or Coptidis Rhizom alone， and the anti-neuroinflammation advantage was closely related to the inhibition of activation of TLR4/MyD88/NF-κB signaling pathway in microglial cells. It was confirmed that TLR4， MyD88 and NF-κB were potential targets for Scutellariae Radix-Coptidis Rhizoma to exert the compatibility advantage.
