Abstract | RATIONALE: OBJECTIVES: METHODS:
Roflumilast was given orally either at 1 mg/kg (R1) or at 5 mg/kg (R5). In the acute model (five cigarettes for 20 minutes), bronchoalveolar lavage fluid (BALF) changes were investigated at 4 and 24 hours. In the chronic model (three cigarettes/day for 7 months), morphometric and biochemical parameters were assessed at 7 months. MEASUREMENTS AND MAIN RESULTS: Acute exposure caused a fivefold increase in BALF neutrophils. Both doses of roflumilast partially prevented (by 30%) this increase. In addition, after smoke exposure, R1 increased BALF interleukin-10 by 79% and R5 by 129%. Chronic smoke exposure caused a 1.8-fold increase in lung macrophage density, emphysema, an increase of the mean linear intercept (+21%), a decrease of the internal surface area (-13%), and a drop (-13%) in lung desmosine content. R1 did not have any effect, whereas R5 prevented the increase in lung macrophage density by 70% and fully prevented the other changes. In addition, in the smoke-exposure group, 63% of the mice showed goblet cell metaplasia, and neither of the doses of roflumilast had any effect. CONCLUSIONS:
|
Authors | Piero A Martorana, Rolf Beume, Monica Lucattelli, Lutz Wollin, Giuseppe Lungarella |
Journal | American journal of respiratory and critical care medicine
(Am J Respir Crit Care Med)
Vol. 172
Issue 7
Pg. 848-53
(Oct 01 2005)
ISSN: 1073-449X [Print] United States |
PMID | 15961691
(Publication Type: Journal Article)
|
Chemical References |
- Aminopyridines
- Benzamides
- Cyclopropanes
- Phosphodiesterase Inhibitors
- Roflumilast
- Interleukin-10
|
Topics |
- Administration, Oral
- Aminopyridines
(administration & dosage, pharmacology, therapeutic use)
- Animals
- Benzamides
(administration & dosage, pharmacology, therapeutic use)
- Bronchoalveolar Lavage Fluid
(chemistry)
- Cyclopropanes
(administration & dosage, pharmacology, therapeutic use)
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Goblet Cells
(pathology)
- Hyperplasia
- Interleukin-10
(analysis)
- Macrophages
(drug effects)
- Male
- Mice
- Mice, Inbred C57BL
- Phosphodiesterase Inhibitors
(administration & dosage, pharmacology, therapeutic use)
- Pulmonary Emphysema
(etiology, prevention & control)
- Smoking
(adverse effects)
|