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 μCi/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.
| Original language | English |
|---|---|
| Pages (from-to) | 110-119 |
| Number of pages | 10 |
| Journal | Environmental Research |
| Volume | 34 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 1984 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Environmental Science(all)
Cite this
Changes in airway permeability and responsiveness after exposure to ozone. / Abraham, W. M.; Delehunt, J. C.; Yerger, L.; Marchette, B.; Oliver, W.
In: Environmental Research, Vol. 34, No. 1, 01.01.1984, p. 110-119.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Changes in airway permeability and responsiveness after exposure to ozone
AU - Abraham, W. M.
AU - Delehunt, J. C.
AU - Yerger, L.
AU - Marchette, B.
AU - Oliver, W.
PY - 1984/1/1
Y1 - 1984/1/1
N2 - 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 μCi/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.
AB - 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 μCi/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.
UR - http://www.scopus.com/inward/record.url?scp=0021164621&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0021164621&partnerID=8YFLogxK
U2 - 10.1016/0013-9351(84)90080-X
DO - 10.1016/0013-9351(84)90080-X
M3 - Article
C2 - 6723600
AN - SCOPUS:0021164621
VL - 34
SP - 110
EP - 119
JO - Environmental Research
JF - Environmental Research
SN - 0013-9351
IS - 1
ER -