Montelukast, a leukotriene receptor antagonist, reduces the concentration of leukotrienes in the respiratory tract of children with persistent asthma

[摘要] Background: Leukotrienes are bronchoactive mediators secreted by inflammatory cells in the respiratory mucosa on exposure to asthma triggers. Objective: We investigated the effect of montelukast, a leukotriene receptor antagonist, on the release of leukotrienes in the respiratory mucosa of children with persistent asthma Method: Twenty-three children aged 6 to 11 gears with moderately severe asthma were treated in a cross-over design starting after a 2-week run in period, with either montelukast (n = 12) or cromolyn (n = 11) for 4 weeks with a 2-week washout period between treatments, Twelve of them were then treated with either montelukast or beclomethasone for 6 months. The use of beta(2)-agonists was recorded on a diary card. The concentration of leukotriene C-4 (LTC4) was measured by HPLC in nasal cashes obtained before and at the end of each treatment period. Eosinophilic cationic protein (ECP) was measured in the nasal washes by RIA Results: The LTC4 concentration significantly decreased in the children treated for the first 4 weeks with montelokast, from 5.03 +/- 1.17 to 1.42 +/- 033 ng/mL (P < .005), and a nonsignificant increase was noted in children treated with cromolyn, from 3.37 +/- 1.11 to 5.88 +/- 2.17 ng/mL (P = .71). ECP concentration also decreased in the children receiving montelukast (P = .12). The concentration of LTC4 remained low after 3 and 6 months of treatment with montelukast (0.8 +/- 0.7 and 1.0 +/- 0.3 mu g/mL) and was lower than with beclomethasone. Children treated with montelukast required significantly fewer beta(2)-agonists (P < .04), Conclusion: Montelukast reduces the concentration of leukotrienes in the respiratory tract of children with persistent asthma parallel to reduction in ECP and clinical improvement This effect was not observed when the same children were treated with cromolyn.

[发布日期] 1999-12-01

[关键词] leukotrienes;nasal washes;asthma;children;montelukast;leukotriene modifiers