15-deoxy-Δ¹²,¹⁴-prostaglandin J₂ ameliorates endotoxin-induced acute lung injury in rats.
- Author:
Dong LIU
1
;
Zhilong GENG
2
;
Wankun ZHU
3
;
Huiwen WANG
2
;
Ye CHEN
2
;
Juan LIANG
4
Author Information
- Publication Type:Journal Article
- MeSH: Acute Lung Injury; chemically induced; drug therapy; immunology; Animals; Chemokine CXCL1; metabolism; I-kappa B Proteins; metabolism; Intercellular Adhesion Molecule-1; metabolism; Lipopolysaccharides; toxicity; Male; NF-KappaB Inhibitor alpha; NF-kappa B; metabolism; Prostaglandin D2; analogs & derivatives; therapeutic use; Rats; Rats, Wistar; Tumor Necrosis Factor-alpha; metabolism
- From: Chinese Medical Journal 2014;127(5):815-820
- CountryChina
- Language:English
-
Abstract:
BACKGROUNDA proinflammatory milieu emerging in the lung due to neutrophil accumulation and activation is a key in the pathogenesis of acute lung injury (ALI). 15-deoxy-Δ(12, 14)-prostaglandin J2 (15d-PGJ2), one of the terminal products of the cyclooxygenase-2 pathway, is known to be the endogenous ligand of peroxisome proliferator-activated receptor γ (PPAR-γ) with multiple physiological properties. Growing evidence indicates that 15d-PGJ2 has anti-inflammatory, antiproliferative, cytoprotective and pro-resolving effects. We investigated whether 15d-PGJ2 has a protective effect against endotoxin-induced acute lung injury in rats.
METHODSTwenty-four male Wistar rats were randomly assigned into four groups (n = 6 per group): sham+vehicle group, sham+15d-PGJ2 group, LPS+vehicle group, and LPS+15d-PGJ2 group. The rats were given either lipopolysaccharide (LPS, 6 mg/kg intravenously) or saline, and pretreated with 15d-PGJ2 (0.3 mg/kg intravenously) or its vehicle (dimethyl sulphoxide) 30 minutes before LPS. Histological alterations, wet/dry weight (W/D) ratio and myeloperoxidase (MPO) activity as well as tumor necrosis factor (TNF)-α and cytokine-induced neutrophil chemoattractant-1 (CINC-1) levels were determined in lung tissues four hours after LPS injection. Immunohistochemical analysis for intercellular adhesion molecule-1 (ICAM-1) expression and Western blotting analysis for nuclear factor (NF)-κB p65 translocation and IκBα protein levels were also studied.
RESULTS15d-PGJ2 pretreatment significantly attenuated LPS-induced lung injury, and reduced the increased W/D ratio, MPO activity, TNF-α, CINC-1 levels, and ICAM-1 expression in the lung. 15d-PGJ2 also suppressed the nuclear NF-κB p65 translocation and increased cytosolic IκBα levels.
CONCLUSIONS15d-PGJ2 protects against endotoxin-induced acute lung injury, most likely through the reduction of proinflammatory protein levels during endotoxemia subsequent to the inhibition of NF-κB activation.