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Best LG, Azure C, Segarra A, Enright KJ, Hamley S, Jerome D, O'Leary MA, O'Leary RA, Parisien A, Trottier K, Yracheta JM, Torgerson DG. Genetic variants and risk of asthma in an American Indian population. Ann Allergy Asthma Immunol 2017; 119:31-36.e1. [PMID: 28668238 DOI: 10.1016/j.anai.2017.05.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/10/2017] [Accepted: 05/12/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Asthma is recognized as a complex, multifactorial disease with a genetic component that is well recognized. Certain genetic variants are associated with asthma in a number of populations. OBJECTIVE To determine whether the same variants increase the risk of asthma among American Indian children. METHODS The electronic medical records of an Indian Health Service facility identified all children between 6 and 17 years of age with case-defining criteria for asthma (n = 108). Control children (n = 216), matched for age, were also identified. Real-time polymerase chain reaction assays were used to genotype 10 single-nucleotide polymorphisms (SNPs) at 6 genetic loci. Genotypic distributions among cases and controls were evaluated by χ2 and logistic regression methods. RESULTS A variant at 5q22.1 revealed a statistically significant imbalance in the distribution of genotypes between case-control pairs (rs10056340, P < .001). In logistic regression analyses, the same variant at 5q22.1 and a variant at 17q21 were associated with asthma at P < .05 (rs10056340 and rs9303277). Inclusions of age, body mass index, and atopy in multivariate models revealed significant associations between rs10056340 (odds ratio, 2.020; 95% confidence interval, 1.283-3.180; P = .002) and all 5 17q21 SNPs and asthma in this population. In analyses restricted to atopic individuals, the association of rs10056340 was essentially unchanged, whereas among nonatopic individuals the trend was in the same direction but nonsignificant. The reverse was true for the 17q21 SNPs. CONCLUSION These findings demonstrate that many variants commonly associated with asthma in other populations also accompany this condition among American Indian children. American Indian children also appear to have an increased risk of asthma associated with obesity.
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Affiliation(s)
- Lyle G Best
- Missouri Breaks Industries Research Inc, Eagle Butte, South Dakota; Science Department, Turtle Mountain Community College, Belcourt, North Dakota; School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota.
| | - Crystal Azure
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | - Alexandre Segarra
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | - Kendra J Enright
- Missouri Breaks Industries Research Inc, Eagle Butte, South Dakota
| | - Shawn Hamley
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | - Dara Jerome
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | - Marcia A O'Leary
- Missouri Breaks Industries Research Inc, Eagle Butte, South Dakota
| | - Rae A O'Leary
- Missouri Breaks Industries Research Inc, Eagle Butte, South Dakota
| | - Ashley Parisien
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | - Kayana Trottier
- Science Department, Turtle Mountain Community College, Belcourt, North Dakota
| | | | - Dara G Torgerson
- Department of Medicine, University of California, San Francisco, San Francisco, California
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Kens OV, Vishtak NV, Acopyan HR, Bergtravm VI. Allelic polymorphism C-590T of the IL4 gene as a probable genetic marker for the increased predisposition to the development of recurrent episodes of acute obstructive bronchitis in children. CYTOL GENET+ 2016. [DOI: 10.3103/s0095452716030051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Park HW, Dahlin A, Tse S, Duan QL, Schuemann B, Martinez FD, Peters SP, Szefler SJ, Lima JJ, Kubo M, Tamari M, Tantisira KG. Genetic predictors associated with improvement of asthma symptoms in response to inhaled corticosteroids. J Allergy Clin Immunol 2014; 133:664-9.e5. [PMID: 24486069 DOI: 10.1016/j.jaci.2013.12.1042] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 12/16/2013] [Accepted: 12/17/2013] [Indexed: 01/01/2023]
Abstract
BACKGROUND To date, genome-wide association studies (GWASs) of inhaled corticosteroid (ICS) response in asthmatic patients have focused primarily on lung function and exacerbations. OBJECTIVE We hypothesized that GWAS analysis could identify novel genetic markers predicting a symptomatic response to ICSs. METHODS We analyzed differences in asthma symptoms in response to ICSs in 124 white children from the Childhood Asthma Management Program (CAMP) trial using scores from diary cards. Of the 440,862 single nucleotide polymorphisms (SNPs) analyzed, the top 100 ranked SNPs were pursued for replication initially in subjects from the pediatric Childhood Asthma Research and Education trials (77 white children) and then in subjects from the adult Asthma Clinical Research Network (110 white adults) and Leukotriene Modifier or Corticosteroid or Corticosteroid-Salmeterol trials (110 white adults). RESULTS The lowest P value for GWAS analysis in the CAMP trial was 8.94 × 10(-8) (rs2388639). Of the 60 SNPs available in the Childhood Asthma Research and Education Network trials, rs1558726 (combined P = 1.02 × 10(-5)), rs2388639 (combined P = 8.56 × 10(-9)), and rs10044254 (combined P = 9.16 × 10(-8)) independently replicated. However, these 3 SNPs were not additionally replicated in the adult asthmatic patients of the remaining trials. rs10044254 lies in the intronic region of F-box and leucine-rich repeat protein 7 (FBXL7) and is associated with decreased expression in immortalized B cells derived from CAMP participants. CONCLUSIONS We have identified a novel SNP, rs10044254, associated with both decreased expression of FBXL7 and improved symptomatic response to ICSs in 2 independent pediatric cohorts. Our results suggest that there might be a specific genetic mechanism regulating symptomatic response to ICSs in children that does not carry over to adults.
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Affiliation(s)
- Heung-Woo Park
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Amber Dahlin
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - Szeman Tse
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - Qing Ling Duan
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - Brooke Schuemann
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass
| | - Fernando D Martinez
- Arizona Respiratory Center, University of Arizona, College of Medicine, Tucson, Ariz
| | - Stephen P Peters
- Center for Genomics and Personalized Medicine Research and the Section on Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, NC
| | - Stanley J Szefler
- Department of Pediatric and Pharmacology, National Jewish Health and University of Colorado, Denver School of Medicine, Denver, Colo
| | - John J Lima
- Center for Pharmacogenomics and Translational Research, Nemours Children's Clinic, Jacksonville, Fla
| | - Michiaki Kubo
- Center for Integrative Medical Sciences, RIKEN, Kanagawa, Japan
| | - Mayumi Tamari
- Center for Integrative Medical Sciences, RIKEN, Kanagawa, Japan
| | - Kelan G Tantisira
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass.
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