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Title: Urinary leukotriene E4 levels after allergen and exercise challenge in bronchial asthma. Author: Smith CM, Christie PE, Hawksworth RJ, Thien F, Lee TH. Journal: Am Rev Respir Dis; 1991 Dec; 144(6):1411-3. PubMed ID: 1660231. Abstract: Urinary leukotriene E4 (LTE4) concentrations were measured in six asthmatic subjects after treadmill exercise, and in five asthmatic subjects after allergen challenge. Exercise and allergen challenge produced a 42 +/- 18% (mean +/- SD) and 22 +/- 8% fall in FEV1, respectively. The baseline concentration of urinary LTE4 in subjects challenged with exercise was 64 (27 to 150) pg/mg creatinine (geometric mean and 95% confidence interval), and in those challenged with allergen it was 36 (23 to 59) pg/mg creatinine. Urinary LTE4 concentrations did not change significantly in the 24 h after exercise. In contrast, there was a mean 4-fold increase in urinary LTE4 during the 3 h after allergen challenge.[Abstract] [Full Text] [Related] [New Search]