Prevention of bronchoconstriction in sensitized guinea pigs: efficacy of common prophylactic drugs

Respiratory Physiology & Neurobiology
Nathalie SchützWalid Habre

Abstract

Efficacy of beta2-agonists (B2), anticholinergics, corticosteroids, anti-inflammatory drugs or antihistamines against methacholine, histamine, or allergen-induced lung constriction was tested in ovalbumin sensitized guinea pigs. Airway resistance (Raw) and parenchymal damping (G) and elastance (H) were determined from low-frequency forced oscillatory input impedance (ZL). ZL was measured under control conditions, during iv infusions of methacholine, and following iv boluses of histamine or ovalbumin. In decreasing potency, ipratropium, salmeterol, fluticasone or cromoglycate reduced the methacholine-induced increases in Raw and G. Only antihistamines had any effects on the histamine-induced increased in Raw, G, and H. The ovalbumin-induced increases in Raw, G and H in the control animals (120 +/- 90%, 201 +/- 126%, 86 +/- 71%) were markedly reduced by pretreatments with antihistamines (18 +/- 11%, 13 +/- 9%, 3+/- 3%) and cromoglycate (29 +/- 13%, 35 +/- 22%, 18 +/- 10%). Bronchoconstriction induced by muscarinic receptor stimulation is inhibited by anticholinergic, anti-inflammatory or beta2-agonist pretreatment; antihistaminic or anti-inflammatory premedication is beneficial if the release of histamine via an exposure to aller...Continue Reading

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Citations

Sep 3, 2011·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Carole F MyersWalid Habre
Feb 1, 2007·Paediatric Anaesthesia·Britta S Von Ungern-Sternberg, Walid Habre
Jun 2, 2009·American Journal of Respiratory and Critical Care Medicine·Sam BayatWalid Habre
Jul 9, 2009·Physiological Reviews·Débora S Faffe, Walter A Zin
Jun 6, 2013·European Journal of Anaesthesiology·Walid Habre, Ferenc Petak

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