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Exercise-induced bronchoconstriction: pathogenesis
There is still active debate on the acute mechanism of exercise-induced bronchoconstriction (EIB). Although it is unlikely that vasoconstriction and hyperemia of the bronchial vasculature are essential events for EIB, it is likely that this vasculature enhances the airway response to dehydration and...
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Published in: | Current allergy and asthma reports 2005-03, Vol.5 (2), p.116-122 |
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description | There is still active debate on the acute mechanism of exercise-induced bronchoconstriction (EIB). Although it is unlikely that vasoconstriction and hyperemia of the bronchial vasculature are essential events for EIB, it is likely that this vasculature enhances the airway response to dehydration and contributes to the pathogenesis of EIB, particularly in elite athletes. Accumulating evidence suggests that airway smooth muscle (ASM) becomes more sensitive as a result of repeated exposure to bulk plasma in response to airway injury from dehydration. Recent evidence also demonstrates sufficient concentrations of mediators that could affect ASM. Paradoxically, mediator release from mast cells may be enhanced and their contractile effects greater when beta(2)-receptor agonists are taken daily. The effect of drugs that have the potential to reduce microvascular leak and reduce or inhibit release or action of these mediators needs to be investigated in elite athletes. |
doi_str_mv | 10.1007/s11882-005-0084-y |
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subjects | Adrenergic beta-2 Receptor Agonists Adrenergic beta-Agonists - pharmacology Bronchial Hyperreactivity - etiology Bronchoconstriction Exercise Humans Mast Cells - physiology Muscle, Smooth - physiology Muscular system Pathogenesis |
title | Exercise-induced bronchoconstriction: pathogenesis |
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