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HERO ID
39493
Reference Type
Journal Article
Title
Changes in airway permeability and responsiveness after exposure to ozone
Author(s)
Abraham, WM; Delehunt, JC; Yerger, L; Marchette, B; Oliver, W, Jr
Year
1984
Is Peer Reviewed?
Yes
Journal
Environmental Research
ISSN:
0013-9351
EISSN:
1096-0953
Volume
34
Issue
1
Page Numbers
110-119
Language
English
PMID
6723600
Web of Science Id
WOS:A1984SV48300012
Abstract
The purpose of this investigation was to examine the relationship between airway responsiveness and the permeability of histamine through the airways in conscious sheep after exposure to ozone (O3). Airway responsiveness was assessed by measuring the change from baseline in mean pulmonary flow resistance following a controlled 2-min inhalation challenge with 1% histamine, containing 200 microCi/ml of [3H]histamine. The rate of appearance of the [3H]histamine in the plasma during inhalation challenge was used to estimate airway permeability. To perturb the airways, conscious sheep were exposed to either 0.5 or 1.0 ppm O3 for 2 hr via an endotracheal tube. Airway responsiveness and airway permeability were measured prior to and 1 day after exposure. In six sheep exposed to 0.5 ppm O3, increased airway responsiveness and airway permeability were observed 1 day after exposure. Four of seven sheep exposed to 1.0 ppm O3 had enhanced airway responsiveness and airway permeability, while the remaining three sheep showed corresponding decreases in airway responsiveness and airway permeability. Since the O3-induced directional changes in airway responsiveness paralleled the directional changes in airway permeability in both the positive and negative directions, it was concluded that changes in airway responsiveness to inhaled histamine following exposure to O3 may be related to concomitant changes in airway permeability to this agent.
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