Regulatory Haplotypes in ARG1 Are Associated with Altered Bronchodilator Response

被引:40
作者
Duan, Qing Ling [1 ,2 ]
Gaume, Brigitte R. [3 ]
Hawkins, Gregory A. [4 ]
Himes, Blanca E. [1 ,2 ,5 ,6 ,7 ]
Bleecker, Eugene R. [4 ]
Klanderman, Barbara [1 ,2 ]
Irvin, Charles G. [8 ]
Peters, Stephen P. [4 ]
Meyers, Deborah A. [4 ]
Hanrahan, John P. [9 ]
Lima, John J. [10 ,11 ]
Litonjua, Augusto A. [1 ,2 ]
Tantisira, Kelan G. [1 ,2 ]
Liggett, Stephen B. [3 ]
机构
[1] Brigham & Womens Hosp, Channing Lab, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Univ Maryland, Sch Med, Dept Med, Baltimore, MD 21201 USA
[4] Wake Forest Univ, Bowman Gray Sch Med, Ctr Genom & Personalized Med Res, Winston Salem, NC USA
[5] MIT, Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 USA
[6] Childrens Hosp Informat Program, Boston, MA USA
[7] Partners Ctr Personalized Genet Med, Boston, MA USA
[8] Univ Vermont, Dept Physiol & Med, Vermont Lung Ctr, Burlington, VT USA
[9] Sepracor Inc, Pulm Clin Res, Marlborough, MA USA
[10] Nemours Childrens Clin, Ctr Clin Pediat Pharmacol, Jacksonville, FL USA
[11] Nemours Childrens Clin, Ctr Pharmacogenet, Jacksonville, FL USA
基金
加拿大健康研究院;
关键词
pharmacogenetics; asthma; beta(2)-agonist; NITRIC-OXIDE; ARGINASE-I; ASTHMA; LUNG; HYPERRESPONSIVENESS; HETEROGENEITY; INHIBITION; STRATEGIES; UNDERLIES;
D O I
10.1164/rccm.201005-0758OC
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
Rationale: beta(2)-agonists, the most common treatment for asthma, have a wide interindividual variability in response, which is partially attributed to genetic factors. We previously identified single nucleotide polymorphisms in the arginase 1 (ARG1) gene, which are associated with beta(2)-agonist bronchodilator response (BDR). Objectives: To identify cis-acting haplotypes in the ARG1 locus that are associated with BDR in patients with asthma and regulate gene expression in vitro. Methods: We resequenced ARG1 in 96 individuals and identified three common, 5' haplotypes (denoted 1, 2, and 3). A haplotype-based association analysis of BDR was performed in three independent, adult asthma drug trial populations. Next, each haplotype was cloned into vectors containing a luciferase reporter gene and transfected into human airway epithelial cells (BEAS-2B) to ascertain its effect on gene expression. Measurements and Main Results: BDR varied by haplotype in each of the three populations with asthma. Individuals with haplotype 1 were more likely to have higher BDR, compared to those with haplotypes 2 and 3, which is supported by odds ratios of 1.25 (95% confidence interval, 1.03-1.71) and 2.18 (95% confidence interval, 1.34-2.52), respectively. Luciferase expression was 50% greater in cells transfected with haplotype 1 compared to haplotypes 2 and 3. Conclusions: The identified ARG1 haplotypes seem to alter BDR and differentially regulate gene expression with a concordance of decreased BDR and reporter activity from haplotypes 2 and 3. These findings may facilitate pharmacogenetic tests to predict individuals who may benefit from other therapeutic agents in addition to beta(2)-agonists for optimal asthma management. Clinical trial registered with www.clinicaltrials.gov (NCT00156819, NCT00046644, and NCT00073840).
引用
收藏
页码:449 / 454
页数:6
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