Inhaled albuterol does not protect against ozone toxicity in nonasthmatic athletes

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Arch. Environ. Health; (United States)

DOI:https://doi.org/10.1080/00039896.1988.9934373· OSTI ID:7024630

Gong, H Jr; Bedi, J F; Horvath, S M

We evaluated the acute prophylactic efficacy of albuterol aerosol in protecting nonasthmatic athletes from the untoward effects of 0.21 ppm ozone (O/sub 3/) on symptoms, pulmonary function, exercise performance, and post-exposure histamine bronchoprovocation. Fifteen trained competitive cyclists participated in a randomized crossover study consisting of double-blinded inhalations of albuterol (180 micrograms) and placebo approximately 30 min prior to heavy continuous exercise (minute ventilation, (VE) greater than or equal to 80 L/min) for 60 min, followed by a maximal sprint (peak VE greater than 140 L/min) until exhaustion. Each subject was exposed randomly to either 0.21 ppm O/sub 3/ or filtered air (FA) during the four single-blinded exposure sessions. Albuterol pretreatment resulted in modest but significant bronchodilation as compared to placebo. However, albuterol did not prevent O/sub 3/-induced respiratory symptoms, decrements in forced vital capacity (FVC), forced expired volume in one second (FEV1.0), and maximum midexpiratory flow rate (FEF25-75%), and positive histamine challenges as compared to that with placebo/O/sub 3/. There were no statistically significant differences in the metabolic data or ride times across all drugs and exposures, although the peak VE was significantly lower with O/sub 3/ than FA (142.3 vs. 150.7 L/min, respectively) regardless of drug. The results indicate that acute pretreatment with inhaled albuterol is unable to prevent or ameliorate O/sub 3/-induced symptoms and alterations in pulmonary function and exercise performance. The contribution of beta-adrenergic mechanisms in the acute airway responses to O/sub 3/ appears to be minimal.

• OSTI ID: 7024630
• Journal Information: Arch. Environ. Health; (United States), Journal Name: Arch. Environ. Health; (United States) Vol. 43:1; ISSN AEHLA
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
ANIMALS
ASTHMA
BIOLOGICAL EFFECTS
BRONCHI
CARDIOVASCULAR AGENTS
DISEASES
DRUGS
EXERCISE
INHALATION
INTAKE
MAMMALS
MAN
OZONE
POLLUTION
PRIMATES
RESPIRATORY SYSTEM
RESPIRATORY SYSTEM DISEASES
SYMPTOMS
TOXICITY
VASODILATORS
VERTEBRATES