Abstract | BACKGROUND: METHODS: The study population consisted of 100 asthmatic children with EIB. The individuals studied were given exercise challenge tests before and after receiving montelukast (5 mg/day) for 8 weeks. Responders were defined as children showing>10% post-treatment improvement in forced expiratory volume in 1 s (FEV1). The LTC4S A(-444)C and CysLTR1 T(+927)C polymorphisms were genotyped by PCR-restriction fragment length polymorphism analysis. RESULTS: Of 100 enrolled children, 68 were classified as responders and 32 were classified as non-responders. No significant association was observed between montelukast responsiveness and LTC4S or CysLTR1 genotype, either alone or in combination. In contrast, montelukast-induced improvement in FEV(1) after exercise was correlated with higher pre-treatment PC20 ( methacholine) values (r=0.210, P=0.036) and lower total IgE levels (r=-0.216, P=0.031). CONCLUSIONS: The LTC4S A(-444)C and CysLTR1 T(+927)C genotypes do not appear to be useful for predicting clinical responsiveness to montelukast, whereas bronchial hyperresponsiveness and total IgE appear to predict the degree of montelukast responsiveness in Korean asthmatic children with EIB.
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Authors | S-Y Lee, H-B Kim, J-H Kim, B-S Kim, M-J Kang, S-O Jang, H-J Seo, S-J Hong |
Journal | Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology
(Clin Exp Allergy)
Vol. 37
Issue 10
Pg. 1487-93
(Oct 2007)
ISSN: 0954-7894 [Print] England |
PMID | 17883728
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Acetates
- Cyclopropanes
- Leukotriene Antagonists
- Membrane Proteins
- Quinolines
- Receptors, Leukotriene
- Sulfides
- Immunoglobulin E
- Glutathione Transferase
- leukotriene-C4 synthase
- leukotriene D4 receptor
- montelukast
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Topics |
- Acetates
(therapeutic use)
- Asthma, Exercise-Induced
(drug therapy, physiopathology)
- Bronchial Hyperreactivity
(drug therapy)
- Child
- Cyclopropanes
- Drug Resistance
(genetics)
- Female
- Glutathione Transferase
(genetics)
- Humans
- Immunoglobulin E
(blood)
- Korea
- Leukotriene Antagonists
(therapeutic use)
- Male
- Membrane Proteins
(genetics)
- Polymorphism, Genetic
- Prognosis
- Quinolines
(therapeutic use)
- Receptors, Leukotriene
(genetics)
- Sulfides
- Treatment Outcome
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