Abstract | RATIONAL: OBJECTIVES: We have investigated the actions of doxofylline against the effects of Escherichia coli LPS in the lungs of BALB/c mice. METHODS: Animals have been treated with doxofylline (0.1, 0.3 and 1 mg/kg i.p.) 24, -and 1 h before, and 6 h after intra-nasal instillation of LPS (10 μg/mouse). Readouts were performed 24 h later. RESULTS:
Doxofylline at 1 and 0.3, but not at 0.1 mg/kg, significantly inhibit neutrophil recruitment to the lung induced by LPS (LPS: 208.4 ± 14.5 versus doxofylline: 1 mg/kg: 106.2 ± 4.8; 0.3 mg/kg: 105.3 ± 10.7 × 10(4) cells/ml). Doxofylline significantly inhibited IL-6 and TNF-α release into BAL fluid in comparison to LPS-treated animals (LPS: 1255.6 ± 143.9 versus doxofylline 1 mg/kg: 527.7 ± 182.9; 0.3 mg/kg: 823.2 ± 102.3 pg/ml). Intra-vital microscopy of the tracheal tissue demonstrated that doxofylline significantly reduced LPS-mediated leukocyte adhesion to the vessel wall (LPS: 5.9 ± 2.4 versus doxofylline 0.3 mg/kg: 1.78 ± 0.87 cells/100 μm/15 s). Similarly, intra-vital microscopy of cremaster muscle demonstrated that doxofylline significantly reduced LPS-mediated leukocyte transmigration across the blood vessel wall ( LPS: 9.3 ± 3.5 versus doxofylline0.3 mg/kg: 3.1 ± 1.87 cells/100 μm(2)). Doxofylline (0.1-10 μM) also reduced fMLP-induced leukocyte migration in vitro, achieving a maximum effect at 10 μM (fMLP: 37.8 ± 0.5 versus doxofylline 10 μM: 15.1 ± 1.2 cells × 10(4)/ml). CONCLUSION:
|
Authors | Yanira Riffo-Vasquez, Francis Man, Clive P Page |
Journal | Pulmonary pharmacology & therapeutics
(Pulm Pharmacol Ther)
Vol. 27
Issue 2
Pg. 170-8
(Apr 2014)
ISSN: 1522-9629 [Electronic] England |
PMID | 24456641
(Publication Type: Journal Article)
|
Copyright | Copyright © 2014 Elsevier Ltd. All rights reserved. |
Chemical References |
- Anti-Inflammatory Agents
- Bronchodilator Agents
- Lipopolysaccharides
- Theophylline
- doxofylline
|
Topics |
- Animals
- Anti-Inflammatory Agents
(administration & dosage, pharmacology)
- Bronchodilator Agents
(administration & dosage, pharmacology)
- Cell Movement
(drug effects)
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Escherichia coli
- Leukocytes
(metabolism)
- Lipopolysaccharides
(toxicity)
- Male
- Mice
- Mice, Inbred BALB C
- Pneumonia
(drug therapy, physiopathology)
- Theophylline
(administration & dosage, analogs & derivatives, pharmacology)
|