title: Praeruptorin D and E attenuate lipopolysaccharide/hydrochloric acid induced acute lung injury in mice.
abstract: Acute lung injury is a life-threatening syndrome characterized by overwhelming lung inflammation and increased microvascular permeability, which causes a high mortality rate worldwide. The dry root of Peucedanum praeruptorum Dunn has been long used to treat respiratory diseases in China. In the present study, Praeruptorin A, C, D and E (PA, PC, PD and PE), four pyranocoumarins extracted from this herb, have been investigated for the pharmacological effects in experimental lung injury mouse models. In lipopolysaccharide (LPS) challenged mice, PA and PC did not show protective effect against lung injury at the dose of 80 mg/kg. However, PD and PE significantly inhibited the infiltration of activated polymorphonuclear leukocytes (PMNs) and decreased the levels of TNF-α and IL-6 in bronchoalveolar lavage fluid at the same dose. There was no statistically significant difference between PD and PE group. Further study demonstrated that PD and PE suppressed protein extravasations in bronchoalveolar lavage fluid, attenuated myeloperoxidase (MPO) activity and the pathological changes in the lung. Both PD and PE suppressed LPS induced Nuclear Factor-kappa B (NF-κB) pathway activation in the lung by decreasing the cytoplasmic loss of Inhibitor κB-α (IκB-α) protein and inhibiting the translocation of p65 from cytoplasm to nucleus. We also extended our study to acid-induced acute lung injury and found that these two compounds protected mice from hydrochloric acid (HCl)-induced lung injury by inhibiting PMNs influx, IL-6 release and protein exudation. Taken together, these results suggested that PD and PE might be useful in the therapy of lung injury.
authors.affiliation: School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China.
authors.forename: Peng-Jiu
authors.initials: PJ
authors.lastname: Yu
authors.forename: Jing-Rong
authors.initials: JR
authors.lastname: Li
authors.forename: Zheng-Guang
authors.initials: ZG
authors.lastname: Zhu
authors.forename: Huan-Yu
authors.initials: HY
authors.lastname: Kong
authors.forename: Hong
authors.initials: H
authors.lastname: Jin
authors.forename: Jun-Yan
authors.initials: JY
authors.lastname: Zhang
authors.forename: Yuan-Xin
authors.initials: YX
authors.lastname: Tian
authors.forename: Zhong-Huang
authors.initials: ZH
authors.lastname: Li
authors.forename: Xiao-Yun
authors.initials: XY
authors.lastname: Wu
authors.forename: Jia-Jie
authors.initials: JJ
authors.lastname: Zhang
authors.forename: Shu-Guang
authors.initials: SG
authors.lastname: Wu
mesh_terms: D055371:Acute Lung Injury / Q000139:chemically induced / Q000188:drug therapy* / Q000276:immunology / Q000473:pathology; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology / Q000627:therapeutic use*; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology / Q000276:immunology; D002452:Cell Count; D003374:Coumarins / Q000494:pharmacology / Q000627:therapeutic use*; D006851:Hydrochloric Acid; D015850:Interleukin-6 / Q000276:immunology; D008070:Lipopolysaccharides; D008168:Lung / Q000187:drug effects / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009195:Peroxidase / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology
chemical_list: D000893:Anti-Inflammatory Agents; D003374:Coumarins; D015850:Interleukin-6; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; D009195:Peroxidase; D006851:Hydrochloric Acid