Glaucocalyxin A alleviates ovalbumin-induced airway inflammation through HMGB1/TLR4/NF-κB signaling pathway in asthmatic mice
10.13220/j.cnki.jipr.2020.09.009
- VernacularTitle: 蓝萼甲素通过HMGB1/TLR4/NF-κB信号通路缓解卵清蛋白诱导的哮喘小鼠气道炎症
- Author:
Yi-Hua PIAO
1
Author Information
1. Jilin Key Laboratory for Immune and Targeting Research on Common Allergic Diseases, Yanbian University
- Publication Type:Journal Article
- Keywords:
Airway inflammation;
Glaucocalyxin A;
High mobility group box1;
Nuclear factor-κB;
Toll-like receptor 4
- From:
Journal of International Pharmaceutical Research
2020;47(9):738-744
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the therapeutic effect of glaucocalyxin A(GLA)on airway inflammation in a mouse mod- el of ovalbumin(OVA)-induced asthma and whether the mechanism is associated with the HMGB1/TLR4/NF-κB signaling pathway. Methods: Forty BALB/c mice were divided into 5 groups(8 mice in each group):control group, OVA model group, GLA-L group (10 mg/kg), GLA-H group(40 mg/kg)and dexamethasone group(1 mg/kg). HE and PAS staining were used to observe the inflammatory infiltration and the number of goblet cells in mouse lung tissue;Diff-Quick staining was used to count various cell types in mouse bronchoalveolar lavage fluid(BALF);ELISA was used to detect the content of inflammatory and pro-inflammatory cytokines in mouse BALF;Western blotting(WB)was used to detect the expression of HMGB1, TLR4, MyD88, NF-κB(nuclear)and NF-κB(cytosol)in lung tissue;immunohistochemistry was used to detect the expression level of HMGB1, TLR4 and NF-κB p65 protein in mouse lung tissue. Results: GLA reduced inflammatory cell exudation and goblet cell proliferation in OVA-induced asthmatic model;GLA treatment significantly decreased eosinophils, neutrophils and lymphocytes in BALF of asthmatic mice, and reduced the levels of pro-inflammatory cytokines(P<0.05);WB results showed that GLA inhibited the protein expression of HMGB1, TLR4, MyD88 and NF-κB(nuclear)(P<0.05);immunohistochemistry results showed that GLA reduced the expression of HMGB1, TLR4 and NF-κB p65 protein in lung tissue(P<0.05). Conclusion: GLA could ameliorate the OVA-induced airway inflammation in asthmatic mice, possibly via interfering in the HMGB1/TLR4/NF-κB signaling pathway.
