Duration of effect of single-dose inhaled fluticasone propionate on AMP-induced bronchoconstriction. 2004

B Luijk, and R D Kempsford, and A M Wright, and P Zanen, and J W J Lammers
Dept of Pulmonary Diseases, Heart-Lung Center Utrecht, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.

Airway hyperresponsiveness induced by adenosine-5'-monophosphate (AMP) is regarded as a reliable model for allergic asthma and for the evaluation of anti-asthmatic drugs. Single-dose inhaled corticosteroids (ICS) are known to be protective in this model, but the duration of action of these drugs in this model has never been studied. The duration of ICS protection was determined by administration of single-dose fluticasone propionate (FP; 1,000 micrograms) up to 26 h before AMP challenge. A randomised, double-blind, placebo-controlled, four-way crossover study was performed in 13 mild asthmatics (mean +/- SD predicted forced expiratory volume in one second (FEV1) 98 +/- 7%). Each subject received placebo and FP (at 26, 14 or 2 h prior to the AMP challenge). Furthermore, the marker exhaled nitric oxide (eNO) was studied after administration at these time points to investigate whether eNO also demonstrates the duration of action of ICS. The doubling concentrations difference (DCD) of AMP causing a 20% fall in FEV1, when FP was administered 26, 14 or 2 h prior to challenge, was significantly increased as compared with placebo: DCD (95% confidence interval) at 26 h, 0.73 (0.20-1.26), p = 0.008; 14 h, 1.50 (0.99-2.01), p < 0.001; and 2 h, 2.89 (2.37-3.40), p < 0.001. However, eNO was not significantly affected at these time points. In conclusion, a single dose of 1,000 micrograms inhaled fluticasone propionate protects against adenosine-5'-monophosphate airway hyperresponsiveness up to 26 h after dosing. This study suggests that adenosine-5'-monophosphate challenge can be used as a sensitive marker to study the duration of action of inhaled corticosteroids.

UI MeSH Term Description Entries
D008297 Male Males
D009569 Nitric Oxide A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP. Endogenous Nitrate Vasodilator,Mononitrogen Monoxide,Nitric Oxide, Endothelium-Derived,Nitrogen Monoxide,Endothelium-Derived Nitric Oxide,Monoxide, Mononitrogen,Monoxide, Nitrogen,Nitrate Vasodilator, Endogenous,Nitric Oxide, Endothelium Derived,Oxide, Nitric,Vasodilator, Endogenous Nitrate
D010919 Placebos Any dummy medication or treatment. Although placebos originally were medicinal preparations having no specific pharmacological activity against a targeted condition, the concept has been extended to include treatments or procedures, especially those administered to control groups in clinical trials in order to provide baseline measurements for the experimental protocol. Sham Treatment
D001985 Bronchial Provocation Tests Tests involving inhalation of allergens (nebulized or in dust form), nebulized pharmacologically active solutions (e.g., histamine, methacholine), or control solutions, followed by assessment of respiratory function. These tests are used in the diagnosis of asthma. Allergen Bronchial Provocation Tests,Allergen Challenge, Endobronchial,Antigen Bronchial Provocation Tests,Bronchial Allergen Challenge,Bronchial Challenge Tests,Inhalation Provocation Tests,Provocation Tests, Bronchial,Endobronchial Challenge Tests,Allergen Challenge, Bronchial,Allergen Challenges, Bronchial,Allergen Challenges, Endobronchial,Bronchial Allergen Challenges,Bronchial Challenge Test,Bronchial Provocation Test,Challenge Test, Bronchial,Challenge Test, Endobronchial,Challenge Tests, Bronchial,Challenge Tests, Endobronchial,Challenge, Bronchial Allergen,Challenge, Endobronchial Allergen,Challenges, Bronchial Allergen,Challenges, Endobronchial Allergen,Endobronchial Allergen Challenge,Endobronchial Allergen Challenges,Endobronchial Challenge Test,Inhalation Provocation Test,Provocation Test, Bronchial,Provocation Test, Inhalation,Provocation Tests, Inhalation,Test, Bronchial Challenge,Test, Bronchial Provocation,Test, Endobronchial Challenge,Test, Inhalation Provocation,Tests, Bronchial Challenge,Tests, Bronchial Provocation,Tests, Endobronchial Challenge,Tests, Inhalation Provocation
D001993 Bronchodilator Agents Agents that cause an increase in the expansion of a bronchus or bronchial tubes. Bronchial-Dilating Agents,Bronchodilator,Bronchodilator Agent,Broncholytic Agent,Bronchodilator Effect,Bronchodilator Effects,Bronchodilators,Broncholytic Agents,Broncholytic Effect,Broncholytic Effects,Agent, Bronchodilator,Agent, Broncholytic,Agents, Bronchial-Dilating,Agents, Bronchodilator,Agents, Broncholytic,Bronchial Dilating Agents,Effect, Bronchodilator,Effect, Broncholytic,Effects, Bronchodilator,Effects, Broncholytic
D004311 Double-Blind Method A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment. Double-Masked Study,Double-Blind Study,Double-Masked Method,Double Blind Method,Double Blind Study,Double Masked Method,Double Masked Study,Double-Blind Methods,Double-Blind Studies,Double-Masked Methods,Double-Masked Studies,Method, Double-Blind,Method, Double-Masked,Methods, Double-Blind,Methods, Double-Masked,Studies, Double-Blind,Studies, Double-Masked,Study, Double-Blind,Study, Double-Masked
D005260 Female Females
D005541 Forced Expiratory Volume Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity. Forced Vital Capacity, Timed,Timed Vital Capacity,Vital Capacity, Timed,FEVt,Capacities, Timed Vital,Capacity, Timed Vital,Expiratory Volume, Forced,Expiratory Volumes, Forced,Forced Expiratory Volumes,Timed Vital Capacities,Vital Capacities, Timed,Volume, Forced Expiratory,Volumes, Forced Expiratory
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000068298 Fluticasone A STEROID with GLUCOCORTICOID RECEPTOR activity that is used to manage the symptoms of ASTHMA; ALLERGIC RHINITIS, and ATOPIC DERMATITIS. Cutivate,Flixonase,Flixotide,Flonase,Flovent,Flovent HFA,Fluticasone Propionate,HFA, Flovent,Propionate, Fluticasone

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