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  • Title: Effects of montelukast on surrogate inflammatory markers in corticosteroid-treated patients with asthma.
    Author: Currie GP, Lee DK, Haggart K, Bates CE, Lipworth BJ.
    Journal: Am J Respir Crit Care Med; 2003 May 01; 167(9):1232-8. PubMed ID: 12456382.
    Abstract:
    We evaluated whether montelukast conferred additive effects in patients with asthma receiving fluticasone/salmeterol (FP/SM) combination and FP alone. Twenty-two patients with mild to moderate asthma completed a double-blind, placebo-controlled study. After a 2-week run-in using FP 250 microg/SM 50 microg 1 puff twice daily, patients entered a randomized crossover period to receive additional montelukast 10 mg daily or placebo for 3 weeks each. For the first 2 weeks, they received FP/SM 1 puff BID, and then they received FP 250 microg 1 puff BID for the 3rd week. The primary outcome was adenosine monophosphate challenge threshold and recovery time; secondary outcomes included surrogate inflammatory markers and lung function. Compared with FP/SM run-in, adding montelukast to FP/SM was better (p < 0.05) than placebo for inflammatory markers but not for lung function. For adenosine monophosphate threshold, recovery, exhaled nitric oxide, and blood eosinophils, there were 1.4 (95% confidence interval, 1.1-1.8) geometric mean fold, 10 minutes (3-17 minutes), 2.1 parts per billion (0.2-3.9 parts per billion), and 88 (34-172) x 10(6)/L differences, respectively. The combination of FP plus montelukast was superior to FP/SM for inflammatory markers but was inferior for lung function. Thus, in patients taking FP/SM or FP, montelukast conferred complimentary effects on surrogate inflammatory markers, which were dissociated from lung function. Further studies are required to evaluate whether these effects of montelukast translate into clinical benefits.
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