Article (Scientific journals)
Ozone-Induced Stimulation of Pulmonary Sympathetic Fibers: A Protective Mechanism against Edema
Delaunois, Annie; Segura, P.; Dessy, Cécile et al.
1997In Toxicology and Applied Pharmacology, 147 (1), p. 71-82
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Keywords :
Time Factors; Substance P/toxicity; Rabbits; Pulmonary Wedge Pressure/drug effects; Pulmonary Edema/chemically induced/prevention & control; Ozone/toxicity; Neuropeptide Y/antagonists & inhibitors; Nerve Fibers/drug effects/pathology; Microscopy, Electron; Male; Lung/blood supply/drug effects/innervation; Guanethidine/pharmacology; Female; Dose-Response Relationship, Drug; Catecholamines/blood/urine; Capillary Permeability/drug effects; Animals; Adrenergic beta-Antagonists/pharmacology; Adrenergic alpha-Antagonists/pharmacology; Adrenergic Agents/pharmacology; Acetylcholine/toxicity; Ozone; respiratory tract; Edema
Abstract :
[en] Tropospheric ozone exerts well-described toxic effects on the respiratory tract. Less documented, by contrast, is the ability of ozone to induce protective mechanisms against agents that are toxic to the lungs. In particular, interactions between ozone and the sympathetic nervous system have never been considered. Using a model of permeability edema in isolated perfused rabbit lungs, we report here that, immediately after exposure of rabbits to 0.4 ppm ozone for 4 hr, the pulmonary microvascular responses to acetylcholine and substance P are completely blocked. Several lines of evidence, including partial inhibition of the ozone-induced protective effect by several drugs (alpha2- and beta-adrenergic antagonists, neuropeptide Y antagonist, guanethidine), measured levels of released catecholamines in blood and urine and the in vitro response of isolated lungs exposed to 0.4 ppm ozone all seem to suggest that ozone can stimulate pulmonary adrenergic fibers and induce the local release of catecholamines and neuropeptide Y, this resulting in transient protection against pulmonary edema. We also showed that, 48 hr after the exposure, ozone increased the baseline microvascular permeability and the response to low concentrations of acetylcholine
Disciplines :
Veterinary medicine & animal health
Pharmacy, pharmacology & toxicology
Author, co-author :
Delaunois, Annie ;  Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire
Segura, P.
Dessy, Cécile ;  Université de Liège - ULiège > Services généraux (Faculté de médecine vétérinaire) > Relations académiques et scientifiques (Méd. vétérinaire)
Ansay, Michel ;  Université de Liège - ULiège > Services généraux (Faculté de médecine vétérinaire) > Relations académiques et scientifiques (Méd. vétérinaire)
Montano, L. M.
Vargas, M. H.
Gustin, Pascal ;  Université de Liège - ULiège > Département de sciences fonctionnelles > Pharmacologie, pharmacothérapie et toxicologie
Language :
English
Title :
Ozone-Induced Stimulation of Pulmonary Sympathetic Fibers: A Protective Mechanism against Edema
Publication date :
1997
Journal title :
Toxicology and Applied Pharmacology
ISSN :
0041-008X
eISSN :
1096-0333
Publisher :
Academic Press, New York, United States - New York
Volume :
147
Issue :
1
Pages :
71-82
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds de la Recherche Scientifique (Communauté française de Belgique) - FNRS; the European Communities (grant CI1*CT93-0032).
Commentary :
Copyright 1997 Academic Press.
Available on ORBi :
since 25 August 2009

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