Lung protection and mechanism of total flavonoids from Patrina villosa Juss in an experimental model of acute lung injury in rats
10.3969/j.issn.1000-4718.2024.07.010
- VernacularTitle:白花败酱草总黄酮对实验性急性肺损伤模型大鼠的肺保护作用及其机制
- Author:
Jianbo LI
1
;
Haiying FENG
;
Jie ZHANG
;
Ming LIU
;
Haibo JIA
;
Weipeng ZHAO
Author Information
1. 河北医科大学第四医院中医科,河北 石家庄 050000
- Keywords:
total flavonoids from Patrina villosa Juss;
acute lung injury;
inflammation;
oxidative stress;
en-doplasmic reticulum stress
- From:
Chinese Journal of Pathophysiology
2024;40(7):1230-1236
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To investigate the protective effect of total flavonoids from Patrina villosa Juss(PJF)on the lung in an experimental rat model of acute lung injury(ALI),and to elucidate the potential mechanism.METHODS:The ALI rat model was established by instilling 5 mg/kg of lipopolysaccharide(LPS)into the airway.Sixty male SD rats were randomly divided into 4 groups:control,LPS,LPS+low-dose PJF(receiving 100 mg/kg PJF one hour before ALI modeling)and LPS+high-dose PJF(receiving 300 mg/kg PJF one hour before ALI modeling).Each group consisted of 15 animals.Lung tissues and bronchoalveolar lavage fluid(BALF)were collected from all groups 24 h after modeling.For as-sessment of lung tissue morphology,HE staining was performed.The wet/dry weight ratio of the lung tissue was deter-mined using the wet/dry weighing method.Evans blue staining was conducted to assess epithelial barrier permeability in lung tissues.ELISA was used to detect the levels of inflammatory factors tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β)and IL-6 in the BALF,as well as oxidative stress markers including superoxide dismutase(SOD),myeloperoxi-dase(MPO)and glutathione peroxidase(GSH-Px)activity,and malondialdehyde(MDA)content in the lung tissue.The expression levels of C/EBP homologous protein(CHOP),glucose-regulated protein 78(GRP78)and X-box binding pro-tein 1(XBP1)in the lung tissue were analyzed by Western blotting.RESULTS:Compared with control group,the rats in LPS group exhibited a blurred alveolar structure with a significant infiltration of inflammatory cells.The ALI score and the wet/dry weight ratio of the lung tissue were increased(P<0.05).Concurrently,the levels of IL-6,IL-1β and TNF-α in the BALF,along with MDA content and MPO activity in the lung tissue,were elevated(P<0.05).Additionally,the pro-tein levels of CHOP,GRP78 and XBP1 were up-regulated in the lung tissue(P<0.05),while the SOD and GSH-Px activi-ty was significantly decreased(P<0.05).Compared with LPS group,PJF intervention exerted beneficial effects on the lung tissue morphology with reduced ALI score and lower lung wet/dry weight ratio(P<0.05).Moreover,the levels of IL-6,IL-1β and TNF-α in BALF,as well as MDA content,MPO activity and the protein levels of CHOP,GRP78 and XBP1 in the lung tissue were all significantly decreased(P<0.05),while the SOD and GSH-Px activity was significantly in-creased(P<0.05).The efficacy in high-dose group exceeded that in low-dose group.CONCLUSION:The PJF have pro-tective effect on the lungs of rats with ALI,and its mechanism may be related to the inhibition of inflammation,oxidative stress and endoplasmic reticulum stress.
