Bronchoprotection by Olodaterol Is Synergistically Enhanced by Tiotropium in a Guinea Pig Model of Allergic Asthma

Marieke Smit, Annet B Zuidhof, Sophie I T Bos, Harm Maarsingh, Reinoud Gosens, Johan Zaagsma, Herman Meurs*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)

Abstract

The novel once-daily β₂-agonist bronchodilator drug olodaterol has recently been shown to be effective in patients with allergic asthma for >24 hours. An increased cholinergic tone common to these patients may decrease the effectiveness of β₂-agonists. This could provide a rationale for combination therapy with olodaterol and the long-acting anticholinergic tiotropium to aim for a once-daily treatment regimen. In guinea pigs, we evaluated the protective effects of olodaterol, alone and in combination with tiotropium, on airway responsiveness to histamine, which is partially mediated by a cholinergic reflex mechanism. In addition, using a guinea pig model of acute allergic asthma, we examined the cooperative effects of these bronchodilators on allergen-induced early (EAR) and late (LAR) asthmatic reactions, airway hyper-responsiveness (AHR) to histamine, and airway inflammation. It was demonstrated that the protective effect of olodaterol against histamine-induced bronchoconstriction was synergistically enhanced and prolonged in the presence of tiotropium. In addition, tiotropium synergistically augmented both the reversal of and the protection against the allergen-induced AHR after the EAR by olodaterol. Olodaterol and tiotropium were highly effective in inhibiting the magnitude of the allergen-induced EAR and LAR, and both reactions were fully inhibited by the combination of these drugs. It is remarkable that these effects were not associated with an effect on inflammatory cell infiltration in the airways. In conclusion, the results indicate that combination therapy with olodaterol and tiotropium may be highly effective in the treatment of allergen-induced asthmatic reactions and AHR.

Original languageEnglish
Pages (from-to)303-310
Number of pages8
JournalJournal of Pharmacology and Experimental Therapeutics
Volume348
Issue number2
DOIs
Publication statusPublished - Feb-2014

Keywords

  • TRACHEAL SMOOTH-MUSCLE
  • PROTEIN-KINASE-C
  • INHALED BETA(2)-ADRENOCEPTOR AGONIST
  • BETA-ADRENOCEPTOR AGONISTS
  • FUNCTIONAL ANTAGONISM
  • PHOSPHOINOSITIDE METABOLISM
  • AIRWAY HYPERRESPONSIVENESS
  • HOMOLOGOUS DESENSITIZATION
  • IPRATROPIUM BROMIDE
  • UNCONTROLLED ASTHMA

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