The effects of salidroside on lung injury and inflammatory response in mice with mycoplasmal pneumonia through the HMGB1/TLR4/NF-κB pathway
10.13431/j.cnki.immunol.j.20250022
- VernacularTitle:红景天苷通过调控HMGB1/TLR4/NF-κB通路影响支原体肺炎小鼠肺损伤及炎症反应
- Author:
Chenxi LI
1
;
Fang PU
1
;
Haiyan YAN
1
Author Information
1. 072750,保定市第二中心医院儿科
- Publication Type:Journal Article
- Keywords:
Salidroside;
Mycoplasmal pneumonia;
Lung injury;
Inflammatory response;
HMGB1/TLR4/NF-κB signaling pathway
- From:
Immunological Journal
2025;41(3):150-156
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of salidroside(Sal)on inflammatory response,lung injury,and high mobility group protein B1/Toll-like receptor 4/nuclear factor kappa B(HMGB1/TLR4/NF-κB)signaling pathway in mice with mycoplasmal pneumonia(MP).Methods An MP mouse model was constructed and randomly assigned into a Model group,a positive control-Azithromycin group(Azithromycin group),low and high dose salidroside groups(Sal-L,Sal-H groups),and high dose salidroside+pathway activator group(Sal-H+rHMGB1 group),with 12 mice in each group.Another 12 healthy mice were included as the control group.The total number of inflammatory cells and levels of inflammatory factors(IL-1β,TNF-α,and IL-6)in mice bronchoalveolar lavage fluid(BALF),levels of inflammatory factors in serum,levels of oxidative stress factors in lung tissue(ELISA),degree of lung tissue injury(HE staining),apoptosis of lung tissue cells(TUNEL staining),and expression levels of HMGB1/TLR4/NF-κB signaling pathway related proteins(Western blot)were measured.Results The lung tissue of mice in the Model group showed obvious pathological injury and infiltration of inflammatory cells,the total inflammatory cell count,inflammatory cytokine levels in BALF,the serum inflammatory cytokine levels,the MDA and NO levels in lung tissue,apoptosis rate,HMGB1 and Bax protein expression levels and p-TLR4/TLR4,p-NF-κB p65/NF-κB p65 values were obviously higher,while the SOD and GSH-Px activities,and the Bel-2 protein expression level in lung tissue were obviously lower(P＜0.05).Compared with the Model group,with the increase of Sal dose,the degree of lung tissue injury and the infiltration of inflammatory cells were reduced in the Sal-L,Sal-H,and Azithromycin groups,the total cell count,inflammatory cytokine levels in BALF,the MDA and NO levels in lung tissue,apoptosis rate,HMGB1 and Bax protein expression levels and p-TLR4/TLR4,p-NF-κB p65/NF-κB p65 values were obviously lower,while the SOD and GSH-Px activities,and the Bcl-2 protein expression level in lung tissue were obviously higher(P＜0.05).Compared with the Sal-H group,the mice in the Sal-H+rHMGB1 group showed severe lung tissue injury,the total inflammatory cell count,inflammatory cytokine levels in BALF,the serum inflammatory cytokine levels,the MDA and NO levels in lung tissue,apoptosis rate,HMGB1 and Bax protein expression levels and p-TLR4/TLR4,p-NF-κB p65/NF-κB p65 values were obviously higher,while the SOD and GSH-Px activities,and the Bcl-2 protein expression level in lung tissue were obviously lower(P＜0.05).Conclusion Sal can inhibit inflammation and oxidative stress responses,improve lung tissue injury in MP mice,and its effect may be related to the inhibition of HMGB1/TLR4/NF-κB signaling pathway activation.
