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Urinary leukotriene E4 after exercise challenge in children with asthma
Y Kikawa1, T Miyanomae, Y Inoue
1Department of Pediatrics, Fukui Medical School, Japan.
The Journal of Allergy and Clinical Immunology
|June 1, 1992
Summary
Urinary leukotriene E4 (LTE4) levels increased significantly after exercise in children with exercise-induced asthma (EIA), suggesting a role for sulfidopeptide leukotrienes in EIA pathogenesis.
Area of Science:
- Pulmonary Medicine
- Immunology
- Biochemistry
Background:
- Exercise-induced asthma (EIA) is a common condition affecting children.
- The role of specific inflammatory mediators in EIA pathogenesis requires further elucidation.
Purpose of the Study:
- To investigate the involvement of sulfidopeptide leukotrienes in the development of EIA.
- To measure urinary leukotriene E4 (LTE4) levels in children with and without EIA before and after exercise.
Main Methods:
- Radioimmunoassay (RIA) was used to quantify urinary LTE4 levels.
- Mass spectrometry confirmed LTE4 presence and RIA specificity.
- Urinary LTE4 was measured in 13 children with EIA and 10 healthy children before and after exercise challenge.
Main Results:
- No significant difference in pre-exercise urinary LTE4 levels between groups.
- Post-exercise urinary LTE4 levels significantly increased in children with EIA (p < 0.05).
- No significant correlation was found between post-exercise LTE4 levels and bronchoconstriction severity in EIA patients.
Conclusions:
- Sulfidopeptide leukotrienes, indicated by LTE4 levels, may contribute to EIA pathogenesis.
- Other factors likely also influence the airway response in EIA.
- Findings support the potential therapeutic role of LTD4 antagonists in managing EIA.
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