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  • Title: Effect of low-dose ciclesonide on allergen-induced responses in subjects with mild allergic asthma.
    Author: Gauvreau GM, Boulet LP, Postma DS, Kawayama T, Watson RM, Duong M, Deschesnes F, De Monchy JG, O'Byrne PM.
    Journal: J Allergy Clin Immunol; 2005 Aug; 116(2):285-91. PubMed ID: 16083781.
    Abstract:
    BACKGROUND: Inhalation of allergens by sensitized patients with asthma induces reversible airway obstruction, airway hyperresponsiveness, and eosinophilic airway inflammation. Attenuation of allergen-induced bronchoconstriction and inflammation has been used to examine the efficacy of therapeutic agents such as inhaled corticosteroids in asthma. Ciclesonide, a nonhalogenated inhaled corticosteroid being developed for the treatment of persistent asthma, remains inactive until cleaved by esterases in the lung. OBJECTIVE: This study examined the effect of low doses of inhaled ciclesonide, 40 microg and 80 microg, on allergen-induced bronchoconstriction, serum eosinophil cationic protein, and eosinophilic airway inflammation. METHODS: Twenty-one nonsmokers with mild atopic asthma completed a multicenter, randomized, 3-way crossover study comparing the effects of 7-day treatment of ciclesonide or placebo. Allergen-induced responses, including the early and late fall in FEV1, peripheral blood eosinophils, serum eosinophil cationic protein levels, and eosinophils in induced sputum were measured. RESULTS: Ciclesonide 80 microg attenuated the early and late asthmatic responses, including the change in FEV1, serum eosinophil cationic protein, and sputum eosinophils measured at 24 hours postchallenge (P < .025). Ciclesonide 40 microg attenuated the late asthmatic responses and sputum eosinophils measured at 24 hours postchallenge (P < .025), with no effect on the early allergen-induced bronchoconstriction, 24-hour FEV1, or serum eosinophil cationic protein levels (P < .025). CONCLUSION: With the exception of 24-hour postchallenge peripheral blood eosinophils, a low dose of ciclesonide, 80 microg, was effective in blocking all allergen-induced responses measured.
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