Abstract
Background: In experimental conditions alveolar fluid clearance is controlled by alveolar β2-adrenergic receptors. We hypothesized that if this occurs in humans, then non-selective β-blockers should reduce the membrane diffusing capacity (DM), an index of lung interstitial fluid homeostasis. Moreover, we wondered whether this effect is potentiated by saline solution infusion, an intervention expected to cause interstitial lung edema. Since fluid retention within the lungs might trigger excessive ventilation during exercise, we also hypothesized that after the β2-blockade ventilation increased in excess to CO2 output and this was further enhanced by interstitial edema. Methods and Results: 22 healthy males took part in the study. On day 1, spirometry, lung diffusion for carbon monoxide (DLCO) including its subcomponents DM and capillary volume (VCap), and cardiopulmonary exercise test were performed. On day 2, these tests were repeated after rapid 25 ml/kg saline infusion. Then, in random order 11 subjects were assigned to oral treatment with Carvedilol (CARV) and 11 to Bisoprolol (BISOPR). When heart rate fell at least by 10 beats·min-1, the tests were repeated before (day 3) and after saline infusion (day 4). CARV but not BISOPR, decreased DM (-13±7%, p = 0.001) and increased VCap (+20±22%, p = 0.016) and VE/VCO2 slope (+12±8%, pM (pCap (p2 slope (p2-alveolar receptors contribute to control alveolar fluid clearance and that interstitial lung fluid may trigger exercise hyperventilation.
| Original language | English |
|---|---|
| Article number | e61877 |
| Journal | PLoS One |
| Volume | 8 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 16 2013 |
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ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Medicine(all)
Cite this
Role of Alveolar β2-Adrenergic Receptors on Lung Fluid Clearance and Exercise Ventilation in Healthy Humans. / Paolillo, Stefania; Pellegrino, Riccardo; Salvioni, Elisabetta; Contini, Mauro; Iorio, Annamaria; Bovis, Francesca; Antonelli, Andrea; Torchio, Roberto; Gulotta, Carlo; Locatelli, Alessandro; Agostoni, Piergiuseppe.
In: PLoS One, Vol. 8, No. 4, e61877, 16.04.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Role of Alveolar β2-Adrenergic Receptors on Lung Fluid Clearance and Exercise Ventilation in Healthy Humans
AU - Paolillo, Stefania
AU - Pellegrino, Riccardo
AU - Salvioni, Elisabetta
AU - Contini, Mauro
AU - Iorio, Annamaria
AU - Bovis, Francesca
AU - Antonelli, Andrea
AU - Torchio, Roberto
AU - Gulotta, Carlo
AU - Locatelli, Alessandro
AU - Agostoni, Piergiuseppe
PY - 2013/4/16
Y1 - 2013/4/16
N2 - Background: In experimental conditions alveolar fluid clearance is controlled by alveolar β2-adrenergic receptors. We hypothesized that if this occurs in humans, then non-selective β-blockers should reduce the membrane diffusing capacity (DM), an index of lung interstitial fluid homeostasis. Moreover, we wondered whether this effect is potentiated by saline solution infusion, an intervention expected to cause interstitial lung edema. Since fluid retention within the lungs might trigger excessive ventilation during exercise, we also hypothesized that after the β2-blockade ventilation increased in excess to CO2 output and this was further enhanced by interstitial edema. Methods and Results: 22 healthy males took part in the study. On day 1, spirometry, lung diffusion for carbon monoxide (DLCO) including its subcomponents DM and capillary volume (VCap), and cardiopulmonary exercise test were performed. On day 2, these tests were repeated after rapid 25 ml/kg saline infusion. Then, in random order 11 subjects were assigned to oral treatment with Carvedilol (CARV) and 11 to Bisoprolol (BISOPR). When heart rate fell at least by 10 beats·min-1, the tests were repeated before (day 3) and after saline infusion (day 4). CARV but not BISOPR, decreased DM (-13±7%, p = 0.001) and increased VCap (+20±22%, p = 0.016) and VE/VCO2 slope (+12±8%, pM (pCap (p2 slope (p2-alveolar receptors contribute to control alveolar fluid clearance and that interstitial lung fluid may trigger exercise hyperventilation.
AB - Background: In experimental conditions alveolar fluid clearance is controlled by alveolar β2-adrenergic receptors. We hypothesized that if this occurs in humans, then non-selective β-blockers should reduce the membrane diffusing capacity (DM), an index of lung interstitial fluid homeostasis. Moreover, we wondered whether this effect is potentiated by saline solution infusion, an intervention expected to cause interstitial lung edema. Since fluid retention within the lungs might trigger excessive ventilation during exercise, we also hypothesized that after the β2-blockade ventilation increased in excess to CO2 output and this was further enhanced by interstitial edema. Methods and Results: 22 healthy males took part in the study. On day 1, spirometry, lung diffusion for carbon monoxide (DLCO) including its subcomponents DM and capillary volume (VCap), and cardiopulmonary exercise test were performed. On day 2, these tests were repeated after rapid 25 ml/kg saline infusion. Then, in random order 11 subjects were assigned to oral treatment with Carvedilol (CARV) and 11 to Bisoprolol (BISOPR). When heart rate fell at least by 10 beats·min-1, the tests were repeated before (day 3) and after saline infusion (day 4). CARV but not BISOPR, decreased DM (-13±7%, p = 0.001) and increased VCap (+20±22%, p = 0.016) and VE/VCO2 slope (+12±8%, pM (pCap (p2 slope (p2-alveolar receptors contribute to control alveolar fluid clearance and that interstitial lung fluid may trigger exercise hyperventilation.
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U2 - 10.1371/journal.pone.0061877
DO - 10.1371/journal.pone.0061877
M3 - Article
VL - 8
JO - PLoS One
JF - PLoS One
SN - 1932-6203
IS - 4
M1 - e61877
ER -