Document Detail


How does exercise cause asthma attacks?
MedLine Citation:
PMID:  16505610     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE OF REVIEW: To remind readers that evaporative water loss from the airway surface is the stimulus for exercise-induced bronchoconstriction. To emphasize that recruitment of the peripheral airways determines severity of exercise-induced bronchoconstriction. To draw attention to the potential for injury of the epithelium and for plasma exudation to contribute to the pathogenesis of exercise-induced bronchoconstriction in athletes. To emphasize that many inflammatory mediators are involved in exercise-induced bronchoconstriction and that some are found in both asthmatic and healthy subjects. RECENT FINDINGS: That inflammatory mediators are released into the airways in response to exercise and can be measured by inducing sputum (histamine, cysteinyl leukotrienes) or collecting condensate from exhaled air (cysteinyl leukotrienes and adenosine). The concentration of mediators was reduced in response to a combination of loratadine and montelukast. Exercise is a stimulus for upregulating the genes coding for the 5-lipoxygenase pathway in healthy subjects. SUMMARY: Dehydration of the airways results in release of mediators. The likely source of these mediators is the mast cell. Epithelial injury occurs in exercise-induced bronchoconstriction. The process of repair may contribute to the development of airway hyperresponsiveness in healthy subjects. Measuring the airway response to exercise, or a surrogate for exercise, as an indicator of airway hyperresponsiveness is warranted in patients with symptoms of asthma.
Authors:
Sandra D Anderson
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Current opinion in allergy and clinical immunology     Volume:  6     ISSN:  1528-4050     ISO Abbreviation:  Curr Opin Allergy Clin Immunol     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-02-28     Completed Date:  2006-08-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100936359     Medline TA:  Curr Opin Allergy Clin Immunol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  37-42     Citation Subset:  IM    
Affiliation:
Department of Respiratory Medicine, Royal Prince Alfred Hospital, Camperdown, NSW, Australia. sandya@med.usyd.edu.au
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MeSH Terms
Descriptor/Qualifier:
Asthma, Exercise-Induced / immunology,  physiopathology*
Bronchoconstriction
Dinoprost / urine
Humans
Inflammation Mediators / immunology
Leukotriene E4 / urine
Mast Cells / physiology
Chemical
Reg. No./Substance:
0/Inflammation Mediators; 551-11-1/Dinoprost; 75715-89-8/Leukotriene E4

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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