Ann Chen Wu1, Blanca E Himes2, Jessica Lasky-Su2, Augusto Litonjua2, Stephen P Peters3, John Lima4, Michiaki Kubo5, Mayumi Tamari5, Yusuke Nakamura6, Weiliang Qiu2, Scott T Weiss2, Kelan Tantisira2. 1. Center for Child Health Care Studies, Department of Population Medicine, Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, Mass; Department of Pediatrics, Children's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass. Electronic address: ann.wu@childrens.harvard.edu. 2. Harvard Medical School, Boston, Mass; Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Center for Genomic Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass. 3. Center for Genomics and Personalized Medicine Research, Wake Forest School of Medicine, Winston-Salem, NC. 4. Nemours Children's Clinic, Centers for Clinical Pediatric Pharmacology and Pharmacogenetics, for the American Lung Association Asthma Clinical Research Centers, Jacksonville, Fla. 5. Riken Center for Genomic Medicine, Kanagawa, Japan. 6. Laboratory of Molecular Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
Abstract
BACKGROUND: Single nucleotide polymorphisms (SNPs) influence a patient's response to inhaled corticosteroids and β2-agonists, and the effect of treatment with inhaled corticosteroids is synergistic with the effect of β2-agonists. We hypothesized that use of inhaled corticosteroids could influence the effect of SNPs associated with a bronchodilator response. OBJECTIVE: To assess whether, among subjects with asthma, the association of SNPs with bronchodilator response is different between those treated with inhaled corticosteroids versus those on placebo. METHODS: A genome-wide association analysis was conducted by using 581 white subjects from the Childhood Asthma Management Program. By using data for 449,540 SNPs, we conducted a gene by environment analysis in PLINK with inhaled corticosteroid treatment as the environmental exposure and bronchodilator response as the outcome measure. We attempted to replicate the top 12 SNPs in the Leukotriene Modifier or Corticosteroid or Corticosteroid-Salmeterol Trial. RESULTS: The combined P value for the Childhood Asthma Management Program and Leukotriene Modifier or Corticosteroid or Corticosteroid-Salmeterol Trial populations was 4.8 × 10(-8) for rs3752120, which is located in the zinc finger protein gene ZNF432 and has an unknown function. CONCLUSIONS: Inhaled corticosteroids appear to modulate the association of bronchodilator response with variant(s) in the ZNF432 gene among adults and children with asthma.
BACKGROUND: Single nucleotide polymorphisms (SNPs) influence a patient's response to inhaled corticosteroids and β2-agonists, and the effect of treatment with inhaled corticosteroids is synergistic with the effect of β2-agonists. We hypothesized that use of inhaled corticosteroids could influence the effect of SNPs associated with a bronchodilator response. OBJECTIVE: To assess whether, among subjects with asthma, the association of SNPs with bronchodilator response is different between those treated with inhaled corticosteroids versus those on placebo. METHODS: A genome-wide association analysis was conducted by using 581 white subjects from the Childhood Asthma Management Program. By using data for 449,540 SNPs, we conducted a gene by environment analysis in PLINK with inhaled corticosteroid treatment as the environmental exposure and bronchodilator response as the outcome measure. We attempted to replicate the top 12 SNPs in the Leukotriene Modifier or Corticosteroid or Corticosteroid-Salmeterol Trial. RESULTS: The combined P value for the Childhood Asthma Management Program and Leukotriene Modifier or Corticosteroid or Corticosteroid-Salmeterol Trial populations was 4.8 × 10(-8) for rs3752120, which is located in the zinc finger protein gene ZNF432 and has an unknown function. CONCLUSIONS: Inhaled corticosteroids appear to modulate the association of bronchodilator response with variant(s) in the ZNF432 gene among adults and children with asthma.
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