1
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Walker MT, Bloodworth JC, Kountz TS, McCarty SL, Green JE, Ferrie RP, Campbell JA, Averill SH, Beckman KB, Grammer LC, Eng C, Avila PC, Farber HJ, Rodriguez-Cintron W, Rodriguez-Santana JR, Serebrisky D, Thyne SM, Seibold MA, Burchard EG, Kumar R, Cook-Mills JM. 5-HTP inhibits eosinophilia via intracellular endothelial 5-HTRs; SNPs in 5-HTRs associate with asthmatic lung function. FRONTIERS IN ALLERGY 2024; 5:1385168. [PMID: 38845678 PMCID: PMC11153829 DOI: 10.3389/falgy.2024.1385168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 05/08/2024] [Indexed: 06/09/2024] Open
Abstract
Background Previous research showed that 5-hydroxytryptophan (5HTP), a metabolic precursor of serotonin, reduces allergic lung inflammation by inhibiting eosinophil migration across endothelial monolayers. Objective It is unknown if serotonin receptors are involved in mediating this 5HTP function or if serotonin receptor (HTR) single nucleotide polymorphisms (SNPs) associate with lung function in humans. Methods Serotonin receptor subtypes were assessed by qPCR, western blot, confocal microscopy, pharmacological inhibitors and siRNA knockdown. HTR SNPs were assessed in two cohorts. Results Pharmacological inhibition or siRNA knockdown of the serotonin receptors HTR1A or HTR1B in endothelial cells abrogated the inhibitory effects of 5HTP on eosinophil transendothelial migration. In contrast, eosinophil transendothelial migration was not inhibited by siRNA knockdown of HTR1A or HTR1B in eosinophils. Surprisingly, these HTRs were intracellular in endothelial cells and an extracellular supplementation with serotonin did not inhibit eosinophil transendothelial migration. This is consistent with the inability of serotonin to cross membranes, the lack of selective serotonin reuptake receptors on endothelial cells, and the studies showing minimal impact of selective serotonin reuptake inhibitors on asthma. To extend our HTR studies to humans with asthma, we examined the CHIRAH and GALA cohorts for HTR SNPs that affect HTR function or are associated with behavior disorders. A polygenic index of SNPs in HTRs was associated with lower lung function in asthmatics. Conclusions Serotonin receptors mediate 5HTP inhibition of transendothelial migration and HTR SNPs associate with lower lung function. These results may serve to aid in design of novel interventions for allergic inflammation.
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Affiliation(s)
- Matthew T. Walker
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Jeffrey C. Bloodworth
- Herman B Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Timothy S. Kountz
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Samantha L. McCarty
- Herman B Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Jeremy E. Green
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Ryan P. Ferrie
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Jackson A. Campbell
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Samantha H. Averill
- Herman B Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | | | - Leslie C. Grammer
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Celeste Eng
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Pedro C. Avila
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Harold J. Farber
- Department of Pediatrics, Section of Pulmonology, Baylor College of Medicine, Texas Children’s Hospital, Houston, TX, United States
| | | | | | - Denise Serebrisky
- Pediatric Pulmonary Division, Jacobi Medical Center, Bronx, NY, United States
| | - Shannon M. Thyne
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
| | - Max A. Seibold
- Center for Genes, Environment, and Health and the Department of Pediatrics, National Jewish Health, Denver, CO, United States
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Denver, CO, United States
| | - Esteban G. Burchard
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Rajesh Kumar
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
- Division of Allergy and Clinical Immunology, Ann and Robert H Lurie Children’s Hospital of Chicago, Chicago, IL, United States
| | - Joan M. Cook-Mills
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
- Herman B Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, United States
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2
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Liu L, Yue D, Hu L, Wang F, Huang Y, Liao Y. Relationship between interleukin-13 rs20541 single nucleotide polymorphisms and therapeutic efficacy in children with asthma. J Int Med Res 2021; 48:300060520929179. [PMID: 32589857 PMCID: PMC7325458 DOI: 10.1177/0300060520929179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective To investigate the relationship between therapeutic efficacy in children with asthma and interleukin-13 (IL-13) rs20541 polymorphisms. Methods Fifty children with moderate-to-severe asthma were assigned to the GG, GA, and AA groups according to the IL-13 gene locus rs20541 polymorphism. The patients received budesonide inhalation suspension 1 mg twice daily combined with fluticasone propionate 80 µg/inhalation. The improvement of clinical symptoms (gasping, coughing, and wheezing), improvement of lung function, and adverse reactions were observed. Results Lung function did not significantly differ among three groups before treatment. After treatment, the time to symptom relief was significantly shorter in the GG group than that in the other two groups. The forced expiratory volume in one second and percent predicted peak expiratory flow were also significantly better in the GG group than in the other two groups. Conclusion Budesonide inhalation suspension combined with fluticasone propionate is an effective treatment regimen for moderate-to-severe asthma. Polymorphism of the IL-13 rs20541 locus may be correlated with therapeutic efficacy. Patients carrying the GG allele were more responsive than their counterparts with the GA or AA allele.
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Affiliation(s)
- Lixiao Liu
- Shanghai Pudong Hospital, Shanghai, China
| | - Dongmei Yue
- Jinan Maternity and Child Care Hospital, Shandong, China
| | - Lan Hu
- Children's Hospital of Fudan University, Shanghai, China
| | - Fei Wang
- Shanghai Pudong Hospital, Shanghai, China
| | - Ying Huang
- Shanghai Pudong Hospital, Shanghai, China
| | - Yang Liao
- Shanghai Pudong Hospital, Shanghai, China
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3
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Scaparrotta A, Franzago M, Marcovecchio ML, Di Pillo S, Chiarelli F, Mohn A, Stuppia L. Role of THRB, ARG1, and ADRB2 Genetic Variants on Bronchodilators Response in Asthmatic Children. J Aerosol Med Pulm Drug Deliv 2019; 32:164-173. [PMID: 30855197 DOI: 10.1089/jamp.2018.1493] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: An interindividual variability in response to short-acting bronchodilator drugs (short-acting inhaled β2-agonists, SABA) exists and this is linked in part to genetic factors. The aim of this study was to verify the influence of single nucleotide polymorphisms (SNPs) of a previously studied gene (ADRB2) and of new candidate genes (THRB and ARG1) on the acute response to SABA in children with asthma. Methods: One hundred asthmatic children (mean age 9.6 ± 3.0 years, 77 boys) underwent allergological and lung function evaluations. Spirometry was performed before and after bronchodilation test (BD test). The ADRB2 region containing the Arg16Gly (rs1042713) and Gln27Glu (rs1042714) variants were amplified by polymerase chain reaction, whereas ARG1 rs2781659 (A>G) and THRB rs892940 (G>A) SNPs were genotyped by high-resolution melting (HRM) analysis. Results: Seventy-seven percent of children developed asthma in the first 6 years of life. Allergic sensitization was observed in 92% (total immunoglobulin G: 529.8 ± 477. kU/L). All patients exhibited respiratory allergy: 43% has multiple respiratory, 22% to single respiratory, and 27% multiple respiratory and food allergies. Fifty four percent children showed positive BD response (forced expiratory volume in 1 second [FEV1] > 12%). Presence of Arg/Gly or Gly/Gly genotypes in position 16 of ADRB2 was significantly associated to a worse BD response (post-BD FEV1: 108.68% ± 15.62% in Arg/Arg vs. 101.86% ± 14.03% in Arg/Gly or Gly/Gly patients, p = 0.02). No significant association was found between spirometric parameters before and after BD for the other three examined SNPs. Conclusion: The influence of genetic variability on responsiveness to drugs could become a key parameter to optimize a tailored therapy for young patients with asthma, especially if drug-resistance occurs.
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Affiliation(s)
- Alessandra Scaparrotta
- 1 Department of Medicine and Aging, School of Medicine and Health Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Marica Franzago
- 1 Department of Medicine and Aging, School of Medicine and Health Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | | | - Sabrina Di Pillo
- 1 Department of Medicine and Aging, School of Medicine and Health Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Francesco Chiarelli
- 1 Department of Medicine and Aging, School of Medicine and Health Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Angelika Mohn
- 1 Department of Medicine and Aging, School of Medicine and Health Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Liborio Stuppia
- 3 Laboratory of Molecular Genetics, Department of Psychological, Health and Territorial Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy.,4 Center for Aging Sciences and Translational Medicine (CESI-Met), "G, d'Annunzio" University of Chieti-Pescara, Chieti, Italy
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4
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Keskin O, Farzan N, Birben E, Akel H, Karaaslan C, Maitland-van der Zee AH, Wechsler ME, Vijverberg SJ, Kalayci O. Genetic associations of the response to inhaled corticosteroids in asthma: a systematic review. Clin Transl Allergy 2019; 9:2. [PMID: 30647901 PMCID: PMC6327448 DOI: 10.1186/s13601-018-0239-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 11/16/2018] [Indexed: 02/06/2023] Open
Abstract
There is wide variability in the response to inhaled corticosteroids (ICS) in asthma. While some of this heterogeneity of response is due to adherence and environmental causes, genetic variation also influences response to treatment and genetic markers may help guide treatment. Over the past years, researchers have investigated the relationship between a large number of genetic variations and response to ICS by performing pharmacogenomic studies. In this systematic review we will provide a summary of recent pharmacogenomic studies on ICS and discuss the latest insight into the potential functional role of identified genetic variants. To date, seven genome wide association studies (GWAS) examining ICS response have been published. There is little overlap between identified variants and methodologies vary largely. However, in vitro and/or in silico analyses provide additional evidence that genes discovered in these GWAS (e.g. GLCCI1, FBXL7, T gene, ALLC, CMTR1) might play a direct or indirect role in asthma/treatment response pathways. Furthermore, more than 30 candidate-gene studies have been performed, mainly attempting to replicate variants discovered in GWAS or candidate genes likely involved in the corticosteroid drug pathway. Single nucleotide polymorphisms located in GLCCI1, NR3C1 and the 17q21 locus were positively replicated in independent populations. Although none of the genetic markers has currently reached clinical practise, these studies might provide novel insights in the complex pathways underlying corticosteroids response in asthmatic patients.
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Affiliation(s)
- Ozlem Keskin
- 1Paediatric Allergy and Immunology Department, School of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Niloufar Farzan
- 2Department of Respiratory Medicine, University of Amsterdam, Amsterdam UMC, Meibergdreef 9, Amsterdam, Netherlands
| | - Esra Birben
- 3Pediatric Allergy and Asthma Unit, Hacettepe University School of Medicine, 06100 Ankara, Turkey
| | - Hayriye Akel
- 4Department of Molecular Biology, Faculty of Sciences, Hacettepe University, Ankara, Turkey
| | - Cagatay Karaaslan
- 4Department of Molecular Biology, Faculty of Sciences, Hacettepe University, Ankara, Turkey
| | - Anke H Maitland-van der Zee
- 2Department of Respiratory Medicine, University of Amsterdam, Amsterdam UMC, Meibergdreef 9, Amsterdam, Netherlands.,5Department of Pediatric Respiratory Medicine and Allergy, University of Amsterdam, Amsterdam UMC, Meibergdreef 9, Amsterdam, Netherlands
| | | | - Susanne J Vijverberg
- 2Department of Respiratory Medicine, University of Amsterdam, Amsterdam UMC, Meibergdreef 9, Amsterdam, Netherlands
| | - Omer Kalayci
- 3Pediatric Allergy and Asthma Unit, Hacettepe University School of Medicine, 06100 Ankara, Turkey
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5
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Smith D, Helgason H, Sulem P, Bjornsdottir US, Lim AC, Sveinbjornsson G, Hasegawa H, Brown M, Ketchem RR, Gavala M, Garrett L, Jonasdottir A, Jonasdottir A, Sigurdsson A, Magnusson OT, Eyjolfsson GI, Olafsson I, Onundarson PT, Sigurdardottir O, Gislason D, Gislason T, Ludviksson BR, Ludviksdottir D, Boezen HM, Heinzmann A, Krueger M, Porsbjerg C, Ahluwalia TS, Waage J, Backer V, Deichmann KA, Koppelman GH, Bønnelykke K, Bisgaard H, Masson G, Thorsteinsdottir U, Gudbjartsson DF, Johnston JA, Jonsdottir I, Stefansson K. A rare IL33 loss-of-function mutation reduces blood eosinophil counts and protects from asthma. PLoS Genet 2017; 13:e1006659. [PMID: 28273074 PMCID: PMC5362243 DOI: 10.1371/journal.pgen.1006659] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 03/22/2017] [Accepted: 02/26/2017] [Indexed: 02/07/2023] Open
Abstract
IL-33 is a tissue-derived cytokine that induces and amplifies eosinophilic inflammation and has emerged as a promising new drug target for asthma and allergic disease. Common variants at IL33 and IL1RL1, encoding the IL-33 receptor ST2, associate with eosinophil counts and asthma. Through whole-genome sequencing and imputation into the Icelandic population, we found a rare variant in IL33 (NM_001199640:exon7:c.487-1G>C (rs146597587-C), allele frequency = 0.65%) that disrupts a canonical splice acceptor site before the last coding exon. It is also found at low frequency in European populations. rs146597587-C associates with lower eosinophil counts (β = -0.21 SD, P = 2.5×10–16, N = 103,104), and reduced risk of asthma in Europeans (OR = 0.47; 95%CI: 0.32, 0.70, P = 1.8×10–4, N cases = 6,465, N controls = 302,977). Heterozygotes have about 40% lower total IL33 mRNA expression than non-carriers and allele-specific analysis based on RNA sequencing and phased genotypes shows that only 20% of the total expression is from the mutated chromosome. In half of those transcripts the mutation causes retention of the last intron, predicted to result in a premature stop codon that leads to truncation of 66 amino acids. The truncated IL-33 has normal intracellular localization but neither binds IL-33R/ST2 nor activates ST2-expressing cells. Together these data demonstrate that rs146597587-C is a loss of function mutation and support the hypothesis that IL-33 haploinsufficiency protects against asthma. Only a few genes have been found to play a role in asthma. These include the genes IL33 and IL1RL1, and sequence variants in the human genome close to these genes were initially found to affect the number of eosinophils, cells that play a role in inflammation of the airways in asthma. Based on this knowledge, we decided to use high resolution sequencing technology to search for variants in these genes that cause changes in structure and function of the proteins they encode. We found a rare (0.65%) sequence variant in the IL33 gene, that causes less production of the IL33 protein and some of the protein formed lacks the capacity to bind to its receptor on cells and promote inflammation. This rare mutation causes reduced number of eosinophils in blood and protects against asthma. These results suggest that drugs that could interfere with the inflammatory activity of the IL33 protein may be beneficial for treatment of asthma.
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Affiliation(s)
- Dirk Smith
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Hannes Helgason
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
- School of Engineering and Natural Sciences, University of Iceland, Reykjavik, Iceland
| | | | - Unnur Steina Bjornsdottir
- Department of Medicine, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Ai Ching Lim
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | | | - Haruki Hasegawa
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Michael Brown
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Randal R. Ketchem
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Monica Gavala
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Logan Garrett
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | | | | | | | | | | | - Isleifur Olafsson
- Department of Clinical Biochemistry, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Pall Torfi Onundarson
- Laboratory Hematology, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Olof Sigurdardottir
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Clinical Biochemistry, Akureyri Hospital, Akureyri, Iceland
| | - David Gislason
- Department of Respiratory Medicine and Sleep, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Thorarinn Gislason
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Bjorn Runar Ludviksson
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Immunology, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Dora Ludviksdottir
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - H. Marike Boezen
- GRIAC research institute, Groningen, The Netherlands
- University Medical Center Groningen, University of Groningen, Department of Epidemiology, Groningen, The Netherlands
| | - Andrea Heinzmann
- Center for Pediatrics, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center – University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Marcus Krueger
- Center for Pediatrics, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center – University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Celeste Porsbjerg
- Department of Respiratory Medicine, Bispebjerg University Hospital, Copenhagen University, Copenhagen, Denmark
| | - Tarunveer S. Ahluwalia
- COPSAC (Copenhagen Prospective Studies on Asthma in Childhood), Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Johannes Waage
- COPSAC (Copenhagen Prospective Studies on Asthma in Childhood), Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Vibeke Backer
- Department of Respiratory Medicine, Bispebjerg University Hospital, Copenhagen University, Copenhagen, Denmark
| | - Klaus A. Deichmann
- Center for Pediatrics, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center – University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Gerard H. Koppelman
- GRIAC research institute, Groningen, The Netherlands
- University Medical Center Groningen, University of Groningen, Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's Hospital, Groningen, The Netherlands
| | - Klaus Bønnelykke
- COPSAC (Copenhagen Prospective Studies on Asthma in Childhood), Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Hans Bisgaard
- COPSAC (Copenhagen Prospective Studies on Asthma in Childhood), Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Gisli Masson
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
| | - Unnur Thorsteinsdottir
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Daniel F. Gudbjartsson
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
- School of Engineering and Natural Sciences, University of Iceland, Reykjavik, Iceland
| | - James A. Johnston
- Amgen Inc., Discovery Research, South San Francisco, California, United States of America
| | - Ingileif Jonsdottir
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Immunology, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
- * E-mail: (KS); (IJ)
| | - Kari Stefansson
- deCODE genetics / Amgen Inc., Reykjavík, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- * E-mail: (KS); (IJ)
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6
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McGeachie MJ, Yates KP, Zhou X, Guo F, Sternberg AL, Van Natta ML, Wise RA, Szefler SJ, Sharma S, Kho AT, Cho MH, Croteau-Chonka DC, Castaldi PJ, Jain G, Sanyal A, Zhan Y, Lajoie BR, Dekker J, Stamatoyannopoulos J, Covar RA, Zeiger RS, Adkinson NF, Williams PV, Kelly HW, Grasemann H, Vonk JM, Koppelman GH, Postma DS, Raby BA, Houston I, Lu Q, Fuhlbrigge AL, Tantisira KG, Silverman EK, Tonascia J, Strunk RC, Weiss ST. Genetics and Genomics of Longitudinal Lung Function Patterns in Individuals with Asthma. Am J Respir Crit Care Med 2016; 194:1465-1474. [PMID: 27367781 PMCID: PMC5215031 DOI: 10.1164/rccm.201602-0250oc] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 06/30/2016] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Patterns of longitudinal lung function growth and decline in childhood asthma have been shown to be important in determining risk for future respiratory ailments including chronic airway obstruction and chronic obstructive pulmonary disease. OBJECTIVES To determine the genetic underpinnings of lung function patterns in subjects with childhood asthma. METHODS We performed a genome-wide association study of 581 non-Hispanic white individuals with asthma that were previously classified by patterns of lung function growth and decline (normal growth, normal growth with early decline, reduced growth, and reduced growth with early decline). The strongest association was also measured in two additional cohorts: a small asthma cohort and a large chronic obstructive pulmonary disease metaanalysis cohort. Interaction between the genomic region encompassing the most strongly associated single-nucleotide polymorphism and nearby genes was assessed by two chromosome conformation capture assays. MEASUREMENTS AND MAIN RESULTS An intergenic single-nucleotide polymorphism (rs4445257) on chromosome 8 was strongly associated with the normal growth with early decline pattern compared with all other pattern groups (P = 6.7 × 10-9; odds ratio, 2.8; 95% confidence interval, 2.0-4.0); replication analysis suggested this variant had opposite effects in normal growth with early decline and reduced growth with early decline pattern groups. Chromosome conformation capture experiments indicated a chromatin interaction between rs4445257 and the promoter of the distal CSMD3 gene. CONCLUSIONS Early decline in lung function after normal growth is associated with a genetic polymorphism that may also protect against early decline in reduced growth groups. Clinical trial registered with www.clinicaltrials.gov (NCT00000575).
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Affiliation(s)
- Michael J. McGeachie
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | | | - Xiaobo Zhou
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Feng Guo
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | | | | | - Robert A. Wise
- School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Stanley J. Szefler
- National Jewish Health and Research Center, Denver, Colorado
- Children's Hospital Colorado and
| | - Sunita Sharma
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Denver, Colorado
| | - Alvin T. Kho
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
- Boston Children’s Hospital, Boston, Massachusetts
| | - Michael H. Cho
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Damien C. Croteau-Chonka
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Peter J. Castaldi
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Gaurav Jain
- Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, and
| | - Amartya Sanyal
- Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, and
- School of Biological Sciences, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Ye Zhan
- Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, and
| | - Bryan R. Lajoie
- Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, and
| | - Job Dekker
- Howard Hughes Medical Institute, Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
| | | | - Ronina A. Covar
- National Jewish Health and Research Center, Denver, Colorado
- Children's Hospital Colorado and
- University of Colorado, Denver, Colorado
| | - Robert S. Zeiger
- Department of Pediatrics, University of California at San Diego, La Jolla, California
- Kaiser Permanente Southern California Region, San Diego, California
| | | | - Paul V. Williams
- ASTHMA, Inc., Clinical Research Center and Northwest Asthma & Allergy Center, Seattle, Washington
| | - H. William Kelly
- University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Hartmut Grasemann
- Division of Respiratory Medicine, Department of Pediatrics, The Hospital for Sick Children and University of Toronto, Toronto, Canada
| | | | - Gerard H. Koppelman
- Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children’s Hospital, and
| | - Dirkje S. Postma
- Department of Pulmonology, University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD, Groningen, the Netherlands
| | - Benjamin A. Raby
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Isaac Houston
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Quan Lu
- Program in Molecular and Integrative Physiological Sciences, Departments of Environmental Health and Genetics & Complex Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; and
| | - Anne L. Fuhlbrigge
- Channing Division of Network Medicine and
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Kelan G. Tantisira
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Edwin K. Silverman
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | | | - Robert C. Strunk
- Division of Allergy, Immunology, and Pulmonary Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Scott T. Weiss
- Channing Division of Network Medicine and
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
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7
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Park TJ, Park JS, Cheong HS, Park BL, Kim LH, Heo JS, Kim YK, Kim KU, Uh ST, Lee HS, Na JO, Seo KH, Choi JS, Kim YH, Kim MS, Park CS, Shin HD. Genome-wide association study identifies ALLC polymorphisms correlated with FEV₁ change by corticosteroid. Clin Chim Acta 2014; 436:20-6. [PMID: 24792382 DOI: 10.1016/j.cca.2014.04.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 04/16/2014] [Accepted: 04/18/2014] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Asthma can be suppressed by inhaled corticosteroids (ICS). However, response to ICS shows marked inter-individual variability. This study is aimed to identify the genetic variants associated with the change in the percentage of forced expiratory volume in 1second (%ΔFEV1) following ICS treatment. METHODS A genome-wide association study was performed in a Korean asthmatic cohort. To further investigate these genetic associations, 11 additional single-nucleotide polymorphisms (SNPs) on the allantoicase (ALLC) gene were selected from the HapMap database and genotyped in the same asthmatic patients in the follow-up study. RESULTS In a genome-wide study, we identified the lowest P-value in ALLC, but none of the SNPs met the genome-wide association criteria (P<1.0×10(-8)). However, among 25 SNPs on ALLC in the follow-up study, 6 variants showed significant associations with the mean %ΔFEV1 in the study subjects (P<3.73×10(-6)). CONCLUSIONS Although the associated signals could not overcome the genome-wide multiple correction due to small sample size (n=189), our results suggest that associated SNPs of ALLC might be genetic predictors of response to ICS, at least with respect to ΔFEV1 in Korean asthmatics.
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Affiliation(s)
- Tae-Joon Park
- Department of Life Science, Sogang University, 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Jong-Sook Park
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Bucheon Hospital, 1174, Jung-dong, Wonmi-gu, Gyeonggi-do 420-020, Republic of Korea
| | - Hyun Sub Cheong
- Department of Genetic Epidemiology, SNP Genetics, Inc., 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Byung-Lae Park
- Department of Genetic Epidemiology, SNP Genetics, Inc., 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Lyoung Hyo Kim
- Department of Genetic Epidemiology, SNP Genetics, Inc., 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Jeong Seok Heo
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Bucheon Hospital, 1174, Jung-dong, Wonmi-gu, Gyeonggi-do 420-020, Republic of Korea
| | - Yang Ki Kim
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Seoul Hospital, 59, Daesagwan-ro, Yongsan-gu, Seoul 140-887, Republic of Korea
| | - Ki-Up Kim
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Seoul Hospital, 59, Daesagwan-ro, Yongsan-gu, Seoul 140-887, Republic of Korea
| | - Soo-Taek Uh
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Seoul Hospital, 59, Daesagwan-ro, Yongsan-gu, Seoul 140-887, Republic of Korea
| | - Ho Sung Lee
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Cheonan Hospital, 23-20, Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-721, Republic of Korea
| | - Joo-Ock Na
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Cheonan Hospital, 23-20, Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-721, Republic of Korea
| | - Ki-Hyun Seo
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Cheonan Hospital, 23-20, Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-721, Republic of Korea
| | - Jae-Sung Choi
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Cheonan Hospital, 23-20, Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-721, Republic of Korea
| | - Yong Hoon Kim
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Cheonan Hospital, 23-20, Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do 330-721, Republic of Korea
| | - Myung-Sin Kim
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Gumi Hospital, 250, Gongdan-dong, Gumi, Kyungsangbook-do 730-706, Republic of Korea
| | - Choon-Sik Park
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Bucheon Hospital, 1174, Jung-dong, Wonmi-gu, Gyeonggi-do 420-020, Republic of Korea.
| | - Hyoung Doo Shin
- Department of Life Science, Sogang University, 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea; Department of Genetic Epidemiology, SNP Genetics, Inc., 35, Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea.
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Proximity to major roadways is a risk factor for airway hyper-responsiveness in adults. Can Respir J 2012; 19:89-95. [PMID: 22536577 DOI: 10.1155/2012/471579] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Proximity to major roads is reported to be associated with asthma and airway hyper-responsiveness in children. Similar studies using objective measurements in adults are not available in Canada. OBJECTIVE To test the hypothesis that adult asthmatic patients who live close to major roads and highways in an urban environment are at a risk of moderate to severe airway hyper-responsiveness. METHODS Airway responsiveness was determined using methacholine bronchial provocation (PC(20)) tests in a cohort of 2625 patients who attended an outpatient clinic in Hamilton, Ontario. Patient addresses were geocoded in a geographic information system to determine proximity to major roads and highways. Multivariate linear and multinomial regression analyses were used to assess whether proximity to roads was a risk factor for airway hyper-responsiveness as measured by PC(20) methacholine. RESULTS Patients who lived within 200 m of a major road had increased odds (OR 1.38 [95% CI 1.04 to 1.85]) of having moderate airway hyperresponsiveness (0.25 mg⁄mL <PC(20) <2.0 mg/mL) compared with having a normal response (PC(20) >16 mg/mL). Spatial analysis also revealed that the majority of patients with severe airway hyper-responsiveness lived within the urban core of the city while those with moderate to mild hyper-responsiveness were also dispersed in rural areas. CONCLUSIONS In an adult population of patients attending an outpatient respiratory clinic in Hamilton, living close to major roadways was associated with an increased risk of moderate airway hyper-responsiveness. This correlation suggests that exposure to traffic emissions may provoke the pathology of airway hyper-responsiveness leading to variable airflow obstruction.
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Imboden M, Bouzigon E, Curjuric I, Ramasamy A, Kumar A, Hancock DB, Wilk JB, Vonk JM, Thun GA, Siroux V, Nadif R, Monier F, Gonzalez JR, Wjst M, Heinrich J, Loehr LR, Franceschini N, North KE, Altmüller J, Koppelman GH, Guerra S, Kronenberg F, Lathrop M, Moffatt MF, O'Connor GT, Strachan DP, Postma DS, London SJ, Schindler C, Kogevinas M, Kauffmann F, Jarvis DL, Demenais F, Probst-Hensch NM. Genome-wide association study of lung function decline in adults with and without asthma. J Allergy Clin Immunol 2012; 129:1218-28. [PMID: 22424883 DOI: 10.1016/j.jaci.2012.01.074] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 10/26/2011] [Accepted: 01/24/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND Genome-wide association studies have identified determinants of chronic obstructive pulmonary disease, asthma, and lung function level; however, none have addressed decline in lung function. OBJECTIVE We conducted the first genome-wide association study on the age-related decrease in FEV(1) and its ratio to forced vital capacity (FVC) stratified a priori by asthma status. METHODS Discovery cohorts included adults of European ancestry (1,441 asthmatic and 2,677 nonasthmatic participants: the Epidemiological Study on the Genetics and Environment of Asthma, the Swiss Cohort Study on Air Pollution and Lung and Heart Disease in Adults, and the European Community Respiratory Health Survey). The associations of FEV(1) and FEV(1)/FVC ratio decrease with 2.5 million single nucleotide polymorphisms (SNPs) were estimated. Thirty loci were followed up by in silico replication (1,160 asthmatic and 10,858 nonasthmatic participants: Atherosclerosis Risk in Communities, the Framingham Heart Study, the British 1958 Birth Cohort, and the Dutch Asthma Study). RESULTS Main signals identified differed between asthmatic and nonasthmatic participants. None of the SNPs reached genome-wide significance. The association between the height-related gene DLEU7 and FEV(1) decrease suggested for nonasthmatic participants in the discovery phase was replicated (discovery, P = 4.8 × 10(-6); replication, P = .03), and additional sensitivity analyses point to a relation to growth. The top ranking signal, TUSC3, which is associated with FEV(1)/FVC ratio decrease in asthmatic participants (P = 5.3 × 10(-8)), did not replicate. SNPs previously associated with cross-sectional lung function were not prominently associated with decline. CONCLUSIONS Genetic heterogeneity of lung function might be extensive. Our results suggest that genetic determinants of longitudinal and cross-sectional lung function differ and vary by asthma status.
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Affiliation(s)
- Medea Imboden
- Swiss Tropical and Public Health Institute, Basel, Switzerland
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10
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Sliwka A, Nowobilski R, Polczyk R, Nizankowska-Mogilnicka E, Szczeklik A. Mild asthmatics benefit from music therapy. J Asthma 2012; 49:401-8. [PMID: 22397390 DOI: 10.3109/02770903.2012.663031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of the study was to evaluate the effectiveness of pulmonary rehabilitation with music therapy in patients with asthma. METHODS Seventy-six selected inpatients (54 women and 22 men; mean age = 56.4 years; SD = 11.8) with stable asthma underwent pulmonary rehabilitation in two groups: standard versus music therapy. RESULTS After the intervention, an increase in analyzed spirometric values (forced expiratory volume at the first second (FEV(1)), FEV(1) as a percentage of vital capacity (FEV(1) % FVC), forced expiratory flow at 25%, 50%, and 75% of vital capacity (FEF(25), FEF(50), and FEF(75), respectively), and peak expiratory flow) was observed in both the groups (p < .05) but without any intergroup differences (p > .05). A greater increase of mean FEV(1) % FVC, FEF(50), and FEF(75) values was observed only in the patients with mild asthma from the music therapy group (p < .05). In both the groups, a dyspnea reduction was noted (p < .001). However, it was influenced neither by the type of rehabilitation nor by the gender (p > .05), but the interaction of these variables was significant (p = .044). A dyspnea reduction was observed in women in both the groups (p < .001) and in men in the music therapy group only (p = .001). A change in the value of anxiety (6.43, SD = 7.73) on the 10th day compared with the first day of the study was noticed (p < .001). However, this change was not influenced by the type of rehabilitation, gender, or a combination of these two variables (p > .05). CONCLUSION Music therapy improves the respiratory function in patients with mild asthma and reduces dyspnea mainly in men with asthma.
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Affiliation(s)
- Agnieszka Sliwka
- Institute of Physiotherapy, Faculty of Health Sciences, Jagiellonian University School of Medicine, Cracow, Poland
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11
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Rihs HP, Lotz A, Ruëff F, Landt O, Brüning T, Raulf-Heimsoth M. Impact of interleukin-13 and -18 promoter polymorphisms in health care workers with natural rubber latex allergy. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:515-524. [PMID: 22686311 DOI: 10.1080/15287394.2012.675302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
It is a matter of debate whether single nucleotide polymorphisms (SNP) in the promoter region of interleukin (IL)-13, an IgE regulator, and IL-18, an inducer of immune responses, modulating the respective protein expression, are accompanied by an increased risk of atopy, allergic asthma, and total IgE levels. The suspected associations were noted in health care workers (HCW) with and without latex allergy. IL-13 (-1055C>T) and three IL-18 (-656T>G, -607C>A, -137G>C) SNP were studied in 523 HCW with natural rubber latex (NRL) exposure and diagnosis in the late 1990s. Three hundred and thirty-four HCW displayed NRL sensitization and allergic symptoms, 93 with latex-allergic asthma, and 189 HCW with neither symptoms nor NRL sensitization. SNP analyses were performed by real-time polymerase chain reaction (PCR) using newly developed LightCycler assays. Analysis of IL-13 -1055C>T by analysis of variance (ANOVA) revealed significantly elevated total IgE levels in HCW carrying the CT or TT variant compared with the CC variant. None of the studied SNP showed an association with NRL-specific IgE. The IL-18 variants -656GG and -607CC displayed 99.5% linkage disequilibrium. Frequencies of alleles -656GG and -607CC were elevated in HCW with NRL asthma (48.4%) compared with HCW without symptoms (37.6%). In contrast, IL-18 -137G>C variants displayed an overall homogenous distribution. The association between the IL-13 -1055T allele and elevated total IgE levels confirms the role of a genetic background for total IgE regulation. The studied IL-18 SNP demonstrated no significant association with the clinical outcome, total IgE, or specific IgE in HCW with natural rubber latex allergy.
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Affiliation(s)
- Hans-Peter Rihs
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany.
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Abstract
Short-acting β2-agonists (SABAs) and long-acting β2-agonists (LABAs) are both important for treatment of asthma and chronic obstructive pulmonary disease (COPD) because of their bronchodilator and bronchoprotective effects. However, the use of these agonists, at least for asthma, has generated some controversy because of their association with increased mortality. Pharmacogenetics is the study of genetically determined variation in response to medications, which might prove useful for target therapies in highly responsive patients, especially for more expensive therapies or those with increased risk of side effects. Variation in response to both SABAs and LABAs has been observed in patients with polymorphisms in the β2 adrenoceptor gene (ADRB2). This review summarizes results from various studies on the possible relationship between ADRB2 polymorphisms and the bronchodilator or bronchoprotective effects of inhaled β2-agonists. By assessing the ADRB2 genotype, the hope is that it will be possible to predict the responsiveness to chronic administration of β2-agonists. Genetic testing, however, is of limited usefulness at this stage for ADRB2 because the common variants identified thus far account for only a small proportion of the variation observed for given responses. Carefully performed and adequately powered clinical trials continue to be important for achieving the goal of pharmacogenetic approaches to therapy.
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Affiliation(s)
- Nobuyuki Hizawa
- Department of Pulmonary Medicine, Institute of Clinical Medicine, University of Tsukuba, Japan.
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13
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Akhabir L, Sandford A. Genetics of interleukin 1 receptor-like 1 in immune and inflammatory diseases. Curr Genomics 2011; 11:591-606. [PMID: 21629437 PMCID: PMC3078684 DOI: 10.2174/138920210793360907] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 07/06/2010] [Accepted: 08/23/2010] [Indexed: 01/08/2023] Open
Abstract
Interleukin 1 receptor-like 1 (IL1RL1) is gaining in recognition due to its involvement in immune/inflammatory disorders. Well-designed animal studies have shown its critical role in experimental allergic inflammation and human in vitro studies have consistently demonstrated its up-regulation in several conditions such as asthma and rheumatoid arthritis. The ligand for IL1RL1 is IL33 which emerged as playing an important role in initiating eosinophilic inflammation and activating other immune cells resulting in an allergic phenotype.An IL1RL1 single nucleotide polymorphism (SNP) was among the most significant results of a genome-wide scan investigating eosinophil counts; in the same study, this SNP associated with asthma in 10 populations.The IL1RL1 gene resides in a region of high linkage disequilibrium containing interleukin 1 receptor genes as well as interleukin 18 receptor and accessory genes. This poses a challenge to researchers interested in deciphering genetic association signals in the region as all of the genes represent interesting candidates for asthma and allergic disease.The IL1RL1 gene and its resulting soluble and receptor proteins have emerged as key regulators of the inflammatory process implicated in a large variety of human pathologies We review the function and expression of the IL1RL1 gene. We also describe the role of IL1RL1 in asthma, allergy, cardiovascular disease, infections, liver disease and kidney disease.
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Affiliation(s)
- Loubna Akhabir
- Department of Medicine, University of British Columbia, UBC James Hogg Research Centre, Providence Heart + Lung Institute, Room 166, St. Paul's Hospital, 1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada
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14
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Himes BE, Klanderman B, Ziniti J, Senter-Sylvia J, Soto-Quiros ME, Avila L, Celedón JC, Lange C, Mariani TJ, Lasky-Su J, Hersh CP, Raby BA, Silverman EK, Weiss ST, DeMeo DL. Association of SERPINE2 with asthma. Chest 2011; 140:667-674. [PMID: 21436250 DOI: 10.1378/chest.10-2973] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The "Dutch hypothesis" suggests that asthma and COPD have common genetic determinants. The serpin peptidase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 2 (SERPINE2) gene previously has been associated with COPD. We sought to determine whether SERPINE2 is associated with asthma and asthma-related phenotypes. METHODS We measured the association of 39 SERPINE2 single-nucleotide polymorphisms (SNPs) with asthma-related phenotypes in 655 parent-child trios from the Childhood Asthma Management Program (CAMP), and we measured the association of 19 SERPINE2 SNPs with asthma in a case-control design of 359 CAMP probands and 846 population control subjects. We attempted to replicate primary asthma-related phenotype findings in one independent population and primary asthma affection status findings in two independent populations. We compared association results with CAMP proband expression quantitative trait loci. RESULTS Nine of 39 SNPs had P < .05 for at least one phenotype in CAMP, and two of these replicated in an independent population of 426 people with childhood asthma. Six of 19 SNPs had P < .05 for association with asthma in CAMP/Illumina. None of these replicated in two independent populations. The expression quantitative trait loci revealed that five SNPs associated with asthma in CAMP/Illumina and one SNP associated with FEV(1) in CAMP are strongly correlated with SERPINE2 expression levels. Comparison of results to previous COPD studies identified five SNPs associated with both asthma- and COPD-related phenotypes. CONCLUSIONS Our results weakly support SERPINE2 as a Dutch hypothesis candidate gene through nominally significant associations with asthma and related traits. Further study of SERPINE2 is necessary to verify its involvement in asthma and COPD.
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Affiliation(s)
- Blanca E Himes
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Children's Hospital Informatics Program, Boston, MA.
| | - Barbara Klanderman
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - John Ziniti
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Jody Senter-Sylvia
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Manuel E Soto-Quiros
- Division of Pediatric Pulmonology, Hospital Nacional de Niños, San José, Costa Rica
| | - Lydiana Avila
- Division of Pediatric Pulmonology, Hospital Nacional de Niños, San José, Costa Rica
| | - Juan C Celedón
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Christoph Lange
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Thomas J Mariani
- Division of Neonatology and Center for Pediatric Biomedical Research, University of Rochester, Rochester, NY
| | - Jessica Lasky-Su
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Craig P Hersh
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Benjamin A Raby
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Edwin K Silverman
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Scott T Weiss
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Dawn L DeMeo
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
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Meulenkamp TM, Gevers SK, Bovenberg JA, Koppelman GH, van Hylckama Vlieg A, Smets EMA. Communication of biobanks' research results: what do (potential) participants want? Am J Med Genet A 2010; 152A:2482-92. [PMID: 20799322 DOI: 10.1002/ajmg.a.33617] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of this study was to investigate (potential) research participants' (a) information preferences with regard to receiving biobanks' genetic research results, and (b) attitudes towards the duties of researchers to communicate research results. A total group of 1,678 was analyzed, consisting of a sample of the general Dutch population (N=1,163) and patients with asthma, rhinitis, and thrombosis (N=515) who completed a survey including six fictitious genetic research results each presented as aggregate and individual result, varied for treatability and kind of disease. Five questions assessed attitudes towards researchers' duties to communicate research results. Additionally, background characteristics were measured. A majority of the respondents wanted to receive aggregate results as well as individual results. A small majority (59%) held the view that researchers should communicate individual results with no health consequences. One third agreed with an information duty only when treatment is available. A preference for individual results and an attitude in favor of communicating results were both associated with belonging to the general Dutch population rather than being a patient, wanting to learn about own health as the reason for biobank-participation, a monitoring coping style, a general desire for health information, perceived meaningfulness of genetic information and no anticipated anxiousness. A sizable majority of respondents showed a high information preference for individual results, even when it is unclear that treatment is available. Fewer were of the opinion that researchers should make this possible. For their communication policy biobanks should take notice of (potential) participants' high information preferences and expectations.
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Affiliation(s)
- Tineke M Meulenkamp
- Department of Medical Psychology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands
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Eisner MD, Anthonisen N, Coultas D, Kuenzli N, Perez-Padilla R, Postma D, Romieu I, Silverman EK, Balmes JR. An official American Thoracic Society public policy statement: Novel risk factors and the global burden of chronic obstructive pulmonary disease. Am J Respir Crit Care Med 2010; 182:693-718. [PMID: 20802169 DOI: 10.1164/rccm.200811-1757st] [Citation(s) in RCA: 612] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
RATIONALE Although cigarette smoking is the most important cause of chronic obstructive pulmonary disease (COPD), a substantial proportion of COPD cases cannot be explained by smoking alone. OBJECTIVES To evaluate the risk factors for COPD besides personal cigarette smoking. METHODS We constituted an ad hoc subcommittee of the American Thoracic Society Environmental and Occupational Health Assembly. An international group of members was invited, based on their scientific expertise in a specific risk factor for COPD. For each risk factor area, the committee reviewed the literature, summarized the evidence, and developed conclusions about the likelihood of it causing COPD. All conclusions were based on unanimous consensus. MEASUREMENTS AND MAIN RESULTS The population-attributable fraction for smoking as a cause of COPD ranged from 9.7 to 97.9%, but was less than 80% in most studies, indicating a substantial burden of disease attributable to nonsmoking risk factors. On the basis of our review, we concluded that specific genetic syndromes and occupational exposures were causally related to the development of COPD. Traffic and other outdoor pollution, secondhand smoke, biomass smoke, and dietary factors are associated with COPD, but sufficient criteria for causation were not met. Chronic asthma and tuberculosis are associated with irreversible loss of lung function, but there remains uncertainty about whether there are important phenotypic differences compared with COPD as it is typically encountered in clinical settings. CONCLUSIONS In public health terms, a substantive burden of COPD is attributable to risk factors other than smoking. To prevent COPD-related disability and mortality, efforts must focus on prevention and cessation of exposure to smoking and these other, less well-recognized risk factors.
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Boelens MC, Gustafson AM, Postma DS, Kok K, van der Vries G, van der Vlies P, Spira A, Lenburg ME, Geerlings M, Sietsma H, Timens W, van den Berg A, Groen HJM. A chronic obstructive pulmonary disease related signature in squamous cell lung cancer. Lung Cancer 2010; 72:177-83. [PMID: 20832896 DOI: 10.1016/j.lungcan.2010.08.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 08/09/2010] [Accepted: 08/11/2010] [Indexed: 12/21/2022]
Abstract
The epidemiological relationship between squamous cell lung cancer (SCC) and chronic obstructive pulmonary disease (COPD), both smoking-related diseases, suggests that they have also a genetic basis. We compared 35 SCC patients with and without COPD with whole-genome gene expression profiles of laser microdissected tissue. Validation of differential expression was performed for 25 genes using quantitative (q)RT-PCR. Subsequently, we performed array-based CGH on the same tumor samples. We found that 374 probes were differentially expressed in SCC from patients with and without COPD. Forty-four probes were derived from genes with mitochondrial functions and 34 probes were located on 5q. All these probes showed a lower expression level in SCC from non-COPD patients. For a random selection of 25 mitochondrial and 5q genes, we confirmed the differential expression by qRT-PCR. Loss of 3p, 5q and 9p was observed, via array-CGH, to be more frequent in SCC from non-COPD patients as compared to SCC from COPD patients. Combination of chromosomal aberrations and the location of the differentially expressed genes showed significant association for loss of the 5q31.2-31.3 region and reduced expression of the 5q genes. In conclusion, a more frequent loss of 5q and a low expression of genes located on 5q in SCC tumors of non-COPD patients compared to tumors from COPD patients was identified suggesting that different oncogenetic pathways are operational in patients with and without COPD.
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Affiliation(s)
- Mirjam C Boelens
- Department of Pathology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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18
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Halapi E, Gudbjartsson DF, Jonsdottir GM, Bjornsdottir US, Thorleifsson G, Helgadottir H, Williams C, Koppelman GH, Heinzmann A, Boezen HM, Jonasdottir A, Blondal T, Gudjonsson SA, Jonasdottir A, Thorlacius T, Henry AP, Altmueller J, Krueger M, Shin HD, Uh ST, Cheong HS, Jonsdottir B, Ludviksson BR, Ludviksdottir D, Gislason D, Park CS, Deichmann K, Thompson PJ, Wjst M, Hall IP, Postma DS, Gislason T, Kong A, Jonsdottir I, Thorsteinsdottir U, Stefansson K. A sequence variant on 17q21 is associated with age at onset and severity of asthma. Eur J Hum Genet 2010; 18:902-8. [PMID: 20372189 PMCID: PMC2987388 DOI: 10.1038/ejhg.2010.38] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 01/13/2010] [Accepted: 02/25/2010] [Indexed: 12/25/2022] Open
Abstract
A sequence variant (rs7216389-T) near the ORMDL3 gene on chromosome 17q21 was recently found to be associated with childhood asthma. We sought to evaluate the effect of rs7216389-T on asthma subphenotypes and its correlation with expression levels of neighboring genes. The association of rs7216389-T with asthma was replicated in six European and one Asian study cohort (N=4917 cases N=34 589 controls). In addition, we found that the association of rs7216389-T was confined to cases with early onset of asthma, particularly in early childhood (age: 0-5 years OR=1.51, P=6.89.10(-9)) and adolescence (age: 14-17 years OR=1.71, P=5.47.10(-9)). A weaker association was observed for onset between 6 and 13 years of age (OR=1.17, P=0.035), but none for adult-onset asthma (OR=1.07, P=0.12). Cases were further stratified by sex, asthma severity and atopy status. An association with greater asthma severity was observed among early-onset asthma cases (P=0.0012), but no association with sex or atopy status was observed among the asthma cases. An association between sequence variants and the expression of genes in the 17q21 region was assessed in white blood cell RNA samples collected from Icelandic individuals (n=743). rs7216389 associated with the expression of GSDMB and ORMDL3 genes. However, other sequence variants showing a weaker association with asthma compared with that of rs7216389 were more strongly associated with the expression of both genes. Thus, the contribution of rs7216389-T to the development of asthma is unlikely to operate only through an impact on the expression of ORMDL3 or GSDMB genes.
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Affiliation(s)
- Eva Halapi
- deCODE Genetics Inc., Reykjavik, Iceland
| | | | | | - Unnur S Bjornsdottir
- deCODE Genetics Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | | | | | - Carolyn Williams
- The Lung Institute of Western Australia, Nedlands, Australia
- The Western Australian Institute of Medical Research, Perth, Australia
- The Centre for Asthma, Allergy and Respiratory Research, University of Western Australia, Perth, Australia
| | - Gerard H Koppelman
- Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Andrea Heinzmann
- Centre of Pediatrics and Adolescent Medicine, University of Freiburg, Freiburg, Germany
| | - H Marike Boezen
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | | | | | | | | | - Amanda P Henry
- Division of Therapeutics, University Hospital of Nottingham, Queen's Medical Centre, Nottingham, UK
| | - Janine Altmueller
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Marcus Krueger
- Centre of Pediatrics and Adolescent Medicine, University of Freiburg, Freiburg, Germany
| | - Hyoung Doo Shin
- Laboratory of Genomic Diversity, Department of Life Science, Sogang University, Seoul, Korea
- Department of Genetic Epidemiology, SNP Genetics Inc., Seoul, Korea
| | - Soo-Taek Uh
- Division of Allergy and Respiratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hyun Sub Cheong
- Department of Genetic Epidemiology, SNP Genetics Inc., Seoul, Korea
| | - Brynja Jonsdottir
- Department of Internal Medicine, Landspitali University Hospital, Reykjavik, Iceland
| | - Bjorn R Ludviksson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Immunology, Landspitali University Hospital, Reykjavik, Iceland
| | - Dora Ludviksdottir
- Department of Allergy, Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | - David Gislason
- Department of Allergy, Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | - Choon-Sik Park
- Division of Allergy and Respiratory Medicine, Soonchunhyang University, Bucheon Hospital, Bucheon, Korea
| | - Klaus Deichmann
- Centre of Pediatrics and Adolescent Medicine, University of Freiburg, Freiburg, Germany
| | - Philip J Thompson
- The Lung Institute of Western Australia, Nedlands, Australia
- The Western Australian Institute of Medical Research, Perth, Australia
- The Centre for Asthma, Allergy and Respiratory Research, University of Western Australia, Perth, Australia
| | - Matthias Wjst
- Institute of Lung Biology and Disease, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Genetic Medicine, EURAC Research, Bozen, Germany
| | - Ian P Hall
- Division of Therapeutics, University Hospital of Nottingham, Queen's Medical Centre, Nottingham, UK
| | - Dirkje S Postma
- Department of Pulmonology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Thorarinn Gislason
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Allergy, Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | | | - Ingileif Jonsdottir
- deCODE Genetics Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Immunology, Landspitali University Hospital, Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE Genetics Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Kari Stefansson
- deCODE Genetics Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
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Walker BL, Leigh R. Use of biologicals as immunotherapy in asthma and related diseases. Expert Rev Clin Immunol 2010; 4:743-56. [PMID: 20477124 DOI: 10.1586/1744666x.4.6.743] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Recent advances in our understanding of the immune-mediated inflammatory pathways in asthma and other allergic diseases have resulted in the development of novel biological compounds for the treatment of these conditions. These compounds offer an advantage over glucocorticosteroid therapy by specifically targeting components of the immunologic cascade, thereby allowing patients to reduce or discontinue their glucocorticosteroid treatment. Another potential advantage of biological compounds is that they may provide additional anti-inflammatory benefits, over and above those provided by glucocorticosteroid therapy, for patients who continue to have evidence of refractory asthma. The anti-IgE monoclonal antibody omalizumab is already being used for the treatment of allergic asthma and a number of other biological therapies are currently in various stages of clinical development. The purpose of this review is to summarize the data from these studies and to provide a rationale for the use of these compounds in asthma and related allergic airway diseases.
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Affiliation(s)
- Brandie L Walker
- Airway Inflammation Research Group, Department of Medicine, Institute of Infection, Immunity and Inflammation, University of Calgary, Calgary, AB, Canada.
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20
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Hersh CP, Pillai SG, Zhu G, Lomas DA, Bakke P, Gulsvik A, DeMeo DL, Klanderman BJ, Lazarus R, Litonjua AA, Sparrow D, Reilly JJ, Agusti A, Calverley PMA, Donner CF, Levy RD, Make BJ, Paré PD, Rennard SI, Vestbo J, Wouters EFM, Scholand MB, Coon H, Hoidal J, Silverman EK. Multistudy fine mapping of chromosome 2q identifies XRCC5 as a chronic obstructive pulmonary disease susceptibility gene. Am J Respir Crit Care Med 2010; 182:605-13. [PMID: 20463177 DOI: 10.1164/rccm.200910-1586oc] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Several family-based studies have identified genetic linkage for lung function and airflow obstruction to chromosome 2q. OBJECTIVES We hypothesized that merging results of high-resolution single nucleotide polymorphism (SNP) mapping in four separate populations would lead to the identification of chronic obstructive pulmonary disease (COPD) susceptibility genes on chromosome 2q. METHODS Within the chromosome 2q linkage region, 2,843 SNPs were genotyped in 806 COPD cases and 779 control subjects from Norway, and 2,484 SNPs were genotyped in 309 patients with severe COPD from the National Emphysema Treatment Trial and 330 community control subjects. Significant associations from the combined results across the two case-control studies were followed up in 1,839 individuals from 603 families from the International COPD Genetics Network (ICGN) and in 949 individuals from 127 families in the Boston Early-Onset COPD Study. MEASUREMENTS AND MAIN RESULTS Merging the results of the two case-control analyses, 14 of the 790 overlapping SNPs had a combined P < 0.01. Two of these 14 SNPs were consistently associated with COPD in the ICGN families. The association with one SNP, located in the gene XRCC5, was replicated in the Boston Early-Onset COPD Study, with a combined P = 2.51 x 10(-5) across the four studies, which remains significant when adjusted for multiple testing (P = 0.02). Genotype imputation confirmed the association with SNPs in XRCC5. CONCLUSIONS By combining data from COPD genetic association studies conducted in four independent patient samples, we have identified XRCC5, an ATP-dependent DNA helicase, as a potential COPD susceptibility gene.
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Affiliation(s)
- Craig P Hersh
- Channing Laboratory, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA.
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21
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Meta-analysis of 20 genome-wide linkage studies evidenced new regions linked to asthma and atopy. Eur J Hum Genet 2010; 18:700-6. [PMID: 20068594 DOI: 10.1038/ejhg.2009.224] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Asthma is caused by a heterogeneous combination of environmental and genetic factors. In the context of GA2LEN (Global Allergy and Asthma European Network), we carried out meta-analyses of almost all genome-wide linkage screens conducted to date in 20 independent populations from different ethnic origins (>or=3024 families with >or=10 027 subjects) for asthma, atopic asthma, bronchial hyper-responsiveness and five atopy-related traits (total immunoglobulin E level, positive skin test response (SPT) to at least one allergen or to House Dust Mite, quantitative score of SPT (SPTQ) and eosinophils (EOS)). We used the genome scan meta-analysis method to assess evidence for linkage within bins of traditionally 30-cM width, and explored the manner in which these results were affected by bin definition. Meta-analyses were conducted in all studies and repeated in families of European ancestry. Genome-wide evidence for linkage was detected for asthma in two regions (2p21-p14 and 6p21) in European families ascertained through two asthmatic sibs. With regard to atopy phenotypes, four regions reached genome-wide significance: 3p25.3-q24 in all families for SPT and three other regions in European families (2q32-q34 for EOS, 5q23-q33 for SPTQ and 17q12-q24 for SPT). Tests of heterogeneity showed consistent evidence of linkage of SPTQ to 3p11-3q21, whereas between-study heterogeneity was detected for asthma in 2p22-p13 and 6p21, and for atopic asthma in 1q23-q25. This large-scale meta-analysis provides an important resource of information that can be used to prioritize further fine-mapping studies and also be integrated with genome-wide association studies to increase power and better interpret the outcomes of these studies.
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Ferreira MAR, Zhao ZZ, Thomsen SF, James M, Evans DM, Postmus PE, Kyvik KO, Backer V, Boomsma DI, Martin NG, Montgomery GW, Duffy DL. Association and interaction analyses of eight genes under asthma linkage peaks. Allergy 2009; 64:1623-8. [PMID: 19824886 DOI: 10.1111/j.1398-9995.2009.02091.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Linkage studies have implicated the 2q33, 9p21, 11q13 and 20q13 regions in the regulation of allergic disease. The aim of this study was to test genetic variants in candidate genes from these regions for association with specific asthma traits. METHODS Ninety-five single nucleotide polymorphisms (SNP) located in eight genes (CD28, CTLA4, ICOS, ADAM23, ADAMTSL1, MS4A2, CDH26 and HRH3) were genotyped in >5000 individuals from Australian (n = 1162), Dutch (n = 99) and Danish (n = 303) families. Traits tested included doctor-diagnosed asthma, atopy, airway obstruction, total serum immunoglobulin (Ig) E levels and eosinophilia. Association was tested using both multivariate and univariate methods, with gene-wide thresholds for significance determined through simulation. Gene-by-gene and gene-by-environment analyses were also performed. RESULTS There was no overall evidence for association with seven of the eight genes tested when considering all genetic variation assayed in each gene. The exception was MS4A2 on chromosome 11q13, which showed weak evidence for association with IgE (gene-wide P < 0.05, rs502581). There were no significant gene-by-gene or gene-by-environment interaction effects after accounting for the number of tests performed. CONCLUSIONS The individual variants genotyped in the 2q33, 9p21 and 20q13 regions do not explain a large fraction of the variation in the quantitative traits tested or have a major impact on asthma or atopy risk. Our results are consistent with a weak effect of MS4A2 polymorphisms on the variation of total IgE levels.
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Affiliation(s)
- M A R Ferreira
- Queensland Institute of Medical Research, Brisbane, Australia
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24
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Bossé Y. Genetics of chronic obstructive pulmonary disease: a succinct review, future avenues and prospective clinical applications. Pharmacogenomics 2009; 10:655-67. [PMID: 19374520 DOI: 10.2217/pgs.09.10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is influenced by genetic and environmental factors. A large number of candidate gene-association studies and genome-wide linkage scans have been conducted to elucidate the genetic architecture underlying this disease. The compilation of these studies clearly revealed the complex genetic nature of COPD. Multiple genes acting on specific environmental backgrounds are likely to be the tenet of this multifactorial disorder. Encouragingly, reproducible susceptibility genes, such as SERPINE2, were recently identified. Advances in genomic research offer unprecedented capabilities to interrogate the human genome and are likely to accelerate the discovery of new genes. A comprehensive catalogue of genes implicated in the pathogenesis of COPD has great potential to lead to the development of new therapies and explain interindividual response to treatment.
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Affiliation(s)
- Yohan Bossé
- Institut universitaire de cardiologie et de pneumologie de Québec, Pavillon Margeritte-d'Youville, Y4190, 2725, Chemin Sainte-Foy, Quebec City, Quebec, G1V 4G5, Canada.
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25
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PLAUR polymorphisms are associated with asthma, PLAUR levels, and lung function decline. J Allergy Clin Immunol 2009; 123:1391-400.e17. [DOI: 10.1016/j.jaci.2009.03.014] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Revised: 03/09/2009] [Accepted: 03/10/2009] [Indexed: 11/20/2022]
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Sharma S, Murphy AJ, Soto-Quiros ME, Avila L, Klanderman BJ, Sylvia JS, Celedón JC, Raby BA, Weiss ST. Association of VEGF polymorphisms with childhood asthma, lung function and airway responsiveness. Eur Respir J 2009; 33:1287-94. [PMID: 19196819 DOI: 10.1183/09031936.00113008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Vascular endothelial growth factor (VEGF) is an angiogenic factor implicated in asthma severity. The objective of the present study was to determine whether VEGF single nucleotide polymorphisms (SNPs) are associated with asthma, lung function and airway responsiveness. The present authors analysed 10 SNPs in 458 white families in the Childhood Asthma Management Program (CAMP). Tests of association with asthma, lung function and airway responsiveness were performed using PBAT software (Golden Helix, Inc. Bozeman, MT, USA; available at www.goldenhelix.com). Family and population-based, revpeated measures analysis of airflow obstruction were conducted. Replication studies were performed in 412 asthmatic children and their parents from Costa Rica. Associations with asthma, lung function and airway responsiveness were observed in both cohorts. SNP rs833058 was associated with asthma in both cohorts. This SNP was also associated with increased airway responsiveness in both populations. An association of rs4711750 and its haplotype with forced expiratory volume in 1 s (FEV(1))/forced vital capacity (FVC) ratio in both cohorts was observed. Longitudinal analysis in CAMP confirmed an association of rs4711750 with FEV(1)/FVC decline over approximately 4.5 yrs of observation. VEGF polymorphisms are associated with childhood asthma, lung function and airway responsiveness in two populations, suggesting that VEGF polymorphisms influence asthma susceptibility, airflow obstruction and airways responsiveness.
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Affiliation(s)
- S Sharma
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Channing Laboratory, Harvard Medical School, Boston, MA 02115, USA.
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27
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Smith AK, Lange LA, Ampleford EJ, Meyers DA, Bleecker ER, Howard TD. Association of polymorphisms in CASP10 and CASP8 with FEV(1)/FVC and bronchial hyperresponsiveness in ethnically diverse asthmatics. Clin Exp Allergy 2008; 38:1738-44. [PMID: 18823309 DOI: 10.1111/j.1365-2222.2008.03095.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Several chromosomal regions have been identified using family-based linkage analysis to contain genes contributing to the development of asthma and allergic disorders. One of these regions, chromosome 2q32-q33, contains a gene cluster containing CFLAR, CASP10 and CASP8. These genes regulate the extrinsic apoptosis pathway utilized by several types of immune and structural cells that have been implicated in the pathogenesis of asthma. OBJECTIVE To assess the role of genetic variation in CFLAR, CASP10 and CASP8 in asthma and related phenotypes in individuals of diverse ethnic backgrounds. METHODS We tested 26 single nucleotide polymorphisms (SNPs) in the CFLAR, CASP10 and CASP8 gene cluster for association with asthma and related phenotypes in African-American, non-Hispanic whites, and Hispanic case-control populations (cases, N=517, controls, N=644). RESULTS Five CASP10 SNPS were associated with forced expiratory volume in 1 s (FEV(1))/forced expiration volume capacity (FVC) in the African-American subjects with asthma (P=0.0009-0.047). Nine SNPs, seven in CASP10 and two in CASP8, were also associated with the degree of bronchial hyperresponsiveness (BHR) (as determined by PC(20)) in race-specific analysis, predominately in the Non-Hispanic white cases. Two SNPs, rs6750157 in CASP10 and rs1045485 in CASP8 were modestly associated with asthma in the African-American (P=0.025) and Hispanic (P=0.033) populations, respectively. CONCLUSION These data suggest a role for CASP10 as a potential modifier of the asthma phenotype, specifically with measures of airway obstruction and BHR.
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Affiliation(s)
- Alicia K Smith
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
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28
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Seibold MA, Wang B, Eng C, Kumar G, Beckman KB, Sen S, Choudhry S, Meade K, Lenoir M, Watson HG, Thyne S, Williams LK, Kumar R, Weiss KB, Grammer LC, Avila PC, Schleimer RP, Burchard EG, Brenner R. An african-specific functional polymorphism in KCNMB1 shows sex-specific association with asthma severity. Hum Mol Genet 2008; 17:2681-90. [PMID: 18535015 DOI: 10.1093/hmg/ddn168] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A highly heritable and reproducible measure of asthma severity is baseline pulmonary function. Pulmonary function is largely determined by airway smooth muscle (ASM) tone and contractility. The large conductance, voltage and calcium-activated potassium (BK) channel negatively regulates smooth muscle tone and contraction in ASM. The modulatory subunit of BK channels, the beta1-subunit, is critical for proper activation of BK channels in smooth muscle and has shown sex hormone specific regulation. We hypothesized that KCNMB1 genetic variants in African Americans may underlie differences in bronchial smooth muscle tone and thus pulmonary function, possibly in a sex-specific manner. Through resequencing of the KCNMB1 gene we identified several common variants including a novel African-specific coding polymorphism (C818T, R140W). The C818T SNP and four other KCNMB1 variants were genotyped in two independent groups of African American asthmatics (n = 509) and tested for association with the pulmonary function measure--forced expiratory volume (FEV(1)) % of predicted value. The 818T allele is associated with a clinically significant decline (-13%) in FEV(1) in both cohorts of asthmatics among males but not females (P(combined) = 0.0003). Patch clamp electrophysiology studies of the BK channel expressed with the 140Trp variant of the beta1-subunit demonstrated significantly reduced channel openings, predicted by the loss of pulmonary function observed. African American male asthmatics carrying the 818T allele (10% of population) are potentially at risk for greater airway obstruction and increased asthma morbidity. Female asthmatics may be insulated from the deleterious effects of the 818T allele by estrogen-mediated upregulation in BK channel activity.
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Affiliation(s)
- Max A Seibold
- Department of Medicine, University of California San Francisco, San Francisco, CA 94143-2911, USA.
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29
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Choudhry S, Taub M, Mei R, Rodriguez-Santana J, Rodriguez-Cintron W, Shriver MD, Ziv E, Risch NJ, Burchard EG. Genome-wide screen for asthma in Puerto Ricans: evidence for association with 5q23 region. Hum Genet 2008; 123:455-68. [PMID: 18401594 DOI: 10.1007/s00439-008-0495-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Accepted: 03/30/2008] [Indexed: 10/22/2022]
Abstract
While the number of success stories for mapping genes associated with complex diseases using genome-wide association approaches is growing, there is still much work to be done in developing methods for such studies when the samples are collected from a population, which may not be homogeneous. Here we report the first genome-wide association study to identify genes associated with asthma in an admixed population. We genotyped 96 Puerto Rican moderate to severe asthma cases and 88 controls as well as 109 samples representing Puerto Rico's founding populations using the Affymetrix GeneChip Human Mapping 100K array sets. The data from samples representing Puerto Rico's founding populations was used to identify ancestry informative markers for admixture mapping analyses. In addition, a genome-wide association analysis using logistic regression was performed on the data. Although neither admixture mapping nor regression analysis gave any significant association with asthma after correction for multiple testing, an overlap analysis using the top scoring SNPs from different methods suggested chromosomal regions 5q23.3 and 13q13.3 as potential regions harboring genes for asthma in Puerto Ricans. The validation analysis of these two regions in 284 Puerto Rican asthma trios gave significant association for the 5q23.3 region. Our results provide strong evidence that the previously linked 5q23 region is associated with asthma in Puerto Ricans. The detection of causative variants in this region will require fine mapping and functional validation.
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Affiliation(s)
- Shweta Choudhry
- Institute for Human Genetics, University of California, San Francisco, CA, USA.
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Contopoulos-Ioannidis DG, Kouri I, Ioannidis JP. Pharmacogenetics of the response to beta 2 agonist drugs: a systematic overview of the field. Pharmacogenomics 2008; 8:933-58. [PMID: 17716228 DOI: 10.2217/14622416.8.8.933] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The response to beta2-agonist treatment shows large repeatability within individuals and may thus be determined by genetic influences. Here we present a systematic overview of the available genetic association and linkage data for beta2-agonist treatment response. Systematic searches identified 66 eligible articles, as of March 2007, pertaining either to B2AR gene polymorphisms and short-acting or long-acting beta2-agonists or to another 29 different genes. We systematize these study results according to gene, agent and type of outcomes addressed. The systematic review highlights major challenges in the field, including extreme multiplicity of analyses; lack of consensus for main phenotypes of interest; typically small sample sizes; and poor replicability of the proposed genetic variants. Future studies will benefit from standardization of analyses and outcomes, hypothesis-free genome-wide association testing platforms, potentially additional fine mapping around new discovered variants, and large-scale collaborative studies with prospective plans for replication among several teams, with transparent public recording of all data.
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31
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Zhang J, Paré PD, Sandford AJ. Recent advances in asthma genetics. Respir Res 2008; 9:4. [PMID: 18197984 PMCID: PMC2244620 DOI: 10.1186/1465-9921-9-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Accepted: 01/15/2008] [Indexed: 12/20/2022] Open
Abstract
There are over 100 genes that have been reported to be associated with asthma or related phenotypes. In 2006–2007 alone there were 53 novel candidate gene associations reported in the literature. Replication of genetic associations and demonstration of a functional mechanism for the associated variants are needed to confirm an asthma susceptibility gene. For most of the candidate genes there is little functional information. In a previous review by Hoffjan et al. published in 2003, functional information was reported for 40 polymorphisms and here we list another 22 genes which have such data. Some important genes such as filaggrin, interleukin-13, interleukin-17 and the cysteinyl leukotriene receptor-1 which not only were replicated by independent association studies but also have functional data are reviewed in this article.
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Affiliation(s)
- Jian Zhang
- James Hogg iCAPTURE Center for Cardiovascular and Pulmonary Research, St, Paul's Hospital, Vancouver, B,C,, V6Z 1Y6,
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32
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Scirica CV, Celedón JC. Genetics of asthma: potential implications for reducing asthma disparities. Chest 2008; 132:770S-781S. [PMID: 17998341 DOI: 10.1378/chest.07-1905] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Although genetic factors may partly explain the differences in asthma prevalence, morbidity, and mortality among ethnic groups in the United States, few studies of the genetics of asthma have included members of ethnic minority groups. Only one genome-wide linkage analysis of asthma and/or asthma-related phenotypes (conducted by the Collaborative Study on the Genetics of Asthma) has included any members of ethnic minority populations. The interpretation of the findings of genetic association studies of asthma in ethnic minority groups is complicated by reduced statistical power due to small sample sizes; the failure to correct for multiple comparisons; a lack of homogeneity of the populations studied with regard to area of residence, ancestral background, and/or country of origin; a lack of measurement of relevant environmental exposures; and (for case-control studies of genetic association) a lack of detection and control of potential population stratification. Genetic studies may improve our understanding of asthma and lead to new methods to prevent, diagnose, and treat this disease. Limited study of asthma genetics in ethnic minority populations is unacceptable, as it may prevent these groups from benefiting from future developments in asthma management and thus widen existing disparities in asthma care. Future genetic association studies of asthma among ethnic minorities in the United States should include large samples of populations that have been adequately defined with regard to area of residence, self-designated ancestry, and country of origin. These studies should also include an adequate assessment of potentially relevant environmental exposures and (for case-control association studies) population stratification.
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Guilloud-Bataille M, Bouzigon E, Annesi-Maesano I, Bousquet J, Charpin D, Gormand F, Hochez J, Just J, Lemainque A, Le Moual N, Matran R, Neukirch F, Oryszczyn MP, Paty E, Pin I, Vervloet D, Kauffmann F, Lathrop M, Demenais F, Dizier MH. Evidence for linkage of a new region (11p14) to eczema and allergic diseases. Hum Genet 2008; 122:605-14. [PMID: 17943316 PMCID: PMC2575854 DOI: 10.1007/s00439-007-0439-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Accepted: 10/08/2007] [Indexed: 12/12/2022]
Abstract
Asthma, allergic rhinitis (AR) and atopic dermatitis also called eczema are allergic co-morbidites, which are likely to depend on pleiotropic genetic effects as well as on specific genetic factors. After a previous genome-wide linkage screen conducted for asthma and AR in a sample of 295 French EGEA families ascertained through asthmatic subjects, the aim here was to search for genetic factors involved in eczema and more particularly the ones shared by the three allergic diseases using the same EGEA data. In this sake, eczema and phenotypes of "allergic disease" accounting for the joint information on the presence/absence of the three diseases were examined by linkage analyses using the maximum likelihood binomial method. A fine mapping was carried out in regions detected for potential linkage, followed by association studies using the family-based association test (FBAT). Evidence for linkage to 11p14 region was shown for "allergic disease" and eczema. Linkage was also indicated between eczema and 5q13 and between "allergic disease" and both 5p15 and 17q21 regions. Fine mapping supported the evidence of linkage to 11p14 and FBAT analyses showed the association between "allergic disease" and a marker located at the linkage peak on 11p14. Further investigations in this region will allow identifying genetic factor(s) which could have pleiotropic effect in the three allergic diseases.
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Affiliation(s)
- Michel Guilloud-Bataille
- Génétique épidémiologique et structures des populations humaines
INSERM : U535IFR69Université Paris Sud - Paris XIHopital Paul Brousse
94817 VILLEJUIF CEDEX,FR
- Recherche en épidémiologie et biostatistique
INSERM : U780INSERM : IFR69Université Paris Sud - Paris XI16, Avenue Paul Vaillant-Couturier
94807 VILLEJUIF CEDEX,FR
| | - Emmanuelle Bouzigon
- Méthodologie statistique et épidémiologie génétique de maladies multifactorielles
INSERM : U794Université d'Evry-Val d'EssonneTour Evry 2 2 ème étage
523 Place des Terrasses de l'Agora
91034 Evry,FR
| | - Isabella Annesi-Maesano
- Epidémiologie, systèmes d'information, modélisation
INSERM : U707Université Pierre et Marie Curie - Paris VIFaculte de Médecine Saint-Antoine
27, Rue Chaligny
75571 PARIS CEDEX 12,FR
| | - Jean Bousquet
- Immunopathologie de l'Inflammation
INSERM : U454Université Montpellier IHopital Arnaud de Villeneuve
371, Avenue du Doyen Gaston Giraud
34295 MONTPELLIER CEDEX 5,FR
| | - Denis Charpin
- Service de pneumologie-allergologie
AP-HM Hôpital NordChemin des Bourrely
13015 Marseille,FR
| | - Frédéric Gormand
- Service de pneumologie
CHU LyonCentre Hospitalier Lyon Sud
69495, Pierre-Bénite cedex,FR
| | - Joëlle Hochez
- Modélisation mathématique et statistique en biologie et médecine
INSERM : U436Université Denis Diderot - Paris VIICHU Pitié Salpétrière
91 bd de l'hopital
75634 Paris Cedex 13,FR
| | - Jocelyne Just
- Centre de l'asthme et de l'allergologie
Hôpital Armand TrousseauAP-HPHÔPITAL ARMAND-TROUSSEAU
26 avenue du docteur Arnold Netter
75 PARIS 12ème,FR
| | - Arnaud Lemainque
- CNG, Centre National de Génotypage
CEA : DSV/IGCentre National de Génotypage
2 rue Gaston Crémieux
CP5721
91057 EVRY Cedex,FR
| | - Nicole Le Moual
- Recherche en épidémiologie et biostatistique
INSERM : U780INSERM : IFR69Université Paris Sud - Paris XI16, Avenue Paul Vaillant-Couturier
94807 VILLEJUIF CEDEX,FR
| | - Régis Matran
- Laboratoire d'Exploration Fonctionnelle
Hôpital Calmette - LilleHôpital Calmette
59000 Lille
FRANCE,FR
| | - Françoise Neukirch
- Mécanismes physiopathologiques de l'insuffisance respiratoire et des complications de l'anesthésie
INSERM : U408Faculté de médecine Xavier Bichat
16, rue Henri Huchard
75018 PARIS,FR
| | - Marie-Pierre Oryszczyn
- Recherche en épidémiologie et biostatistique
INSERM : U780INSERM : IFR69Université Paris Sud - Paris XI16, Avenue Paul Vaillant-Couturier
94807 VILLEJUIF CEDEX,FR
| | - Evelyne Paty
- Service d'Allergologie et de Pneumologie Infantiles
Hôpital Necker - Enfants MaladesAP-HP149 r de Sèvres
75015 Paris,FR
| | - Isabelle Pin
- Département de médecine aiguë spécialisée
CHU GrenobleHôpital MichallonGrenoble,FR
| | - Daniel Vervloet
- Service de Pneumo-Allergologie
AP-HMHôpital Sainte-Marguerite80, rue Brochier
13 354 Marseille cedex 5,FR
| | - Francine Kauffmann
- Recherche en épidémiologie et biostatistique
INSERM : U780INSERM : IFR69Université Paris Sud - Paris XI16, Avenue Paul Vaillant-Couturier
94807 VILLEJUIF CEDEX,FR
| | - Mark Lathrop
- CNG, Centre National de Génotypage
CEA : DSV/IGCentre National de Génotypage
2 rue Gaston Crémieux
CP5721
91057 EVRY Cedex,FR
| | - Florence Demenais
- Méthodologie statistique et épidémiologie génétique de maladies multifactorielles
INSERM : U794Université d'Evry-Val d'EssonneTour Evry 2 2 ème étage
523 Place des Terrasses de l'Agora
91034 Evry,FR
| | - Marie-Hélène Dizier
- Génétique épidémiologique et structures des populations humaines
INSERM : U535IFR69Université Paris Sud - Paris XIHopital Paul Brousse
94817 VILLEJUIF CEDEX,FR
- Recherche en épidémiologie et biostatistique
INSERM : U780INSERM : IFR69Université Paris Sud - Paris XI16, Avenue Paul Vaillant-Couturier
94807 VILLEJUIF CEDEX,FR
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Abstract
It has been recognized that features of chronic obstructive pulmonary disease (COPD) and asthma overlap, often rendering a firm diagnosis difficult to achieve for the clinical practitioner. There are hypotheses suggesting that both asthma and COPD may indeed share common origins with differences in phenotypic presentation being related to disease evolution or interaction between endogenous and exogenous factors. Others suggest that the two conditions are clinically and pathophysiologically distinct. Studies of the underlying inflammation demonstrate a difference in the preponderance of inflammatory cells and mediators in each disease, yet many shared characteristics in the inflammatory process can be found when examining the two conditions. Generally, later age of presentation favors a diagnosis of COPD; fully reversible airflow limitation on pulmonary function testing suggests a diagnosis of asthma; hyperinflation at rest makes a diagnosis of COPD likely; impaired diffusing capacity is associated with COPD whereas these measurements in patients suffering from asthma are usually normal or even elevated; reduced elastic recoil is the hallmark of COPD, particularly those who pathophysiologically demonstrate abnormal enlargement of air spaces with wall destruction seen in emphysema; and finally history of atopy favors a diagnosis of asthma, particularly if presenting at a younger age. This review reflects discussion of the differences and similarities in diagnosis and treatment.
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Affiliation(s)
- Jesse Chang
- Division of Pulmonary Medicine, Cedars Sinai Medical Center, Los Angeles, CA 90048, USA
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Abstract
In asthma, as in many other common multifactorial diseases, the identification of the susceptibility genes has been challenging because consistent results at the genome-wide significance level have been scarce. So far, genome-wide scans have been reported in 17 study populations. By means of genome-wide linkage and hierarchical association analysis, six positional candidate genes (ADAM33, PHF11, DPP10, GPR154, HLA-G, and CYFIP2) for asthma-related traits have been cloned. The interactions of the proteins encoded by these genes and the biological relevance of these signaling pathways in the development of asthma are still poorly understood. Also, the disease mechanisms resulting from the genetic variance in the genes identified remain largely unknown. Although this information is gradually accumulating, we can examine the statistical robustness of each genetic finding in combination with the limited data available on the functional properties of the corresponding proteins to estimate the strengths and weaknesses in the chains of evidence.
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Abstract
Asthma is a chronic inflammatory airways disease, with a rising prevalence, particularly in childhood, and is considered an important public health problem. Its familial transmission is recognised, while the description and identification of the genes implicated in this disease are a challenge. In this revision paper the authors give a comprehensive explanation of the associated genes as well as the laboratorial methods that allow their identification.
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Affiliation(s)
- Paula Alexandra Videira
- Faculty of Medical Sciences, Department of Immunology, Universidade Nova de Lisboa, Campo dos Mártires da Pátria no. 130, 1169-056 Lisbon
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Hunninghake GM, Soto-Quirós ME, Avila L, Su J, Murphy A, Demeo DL, Ly NP, Liang C, Sylvia JS, Klanderman BJ, Lange C, Raby BA, Silverman EK, Celedón JC. Polymorphisms in IL13, total IgE, eosinophilia, and asthma exacerbations in childhood. J Allergy Clin Immunol 2007; 120:84-90. [PMID: 17561245 DOI: 10.1016/j.jaci.2007.04.032] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 04/23/2007] [Accepted: 04/24/2007] [Indexed: 11/20/2022]
Abstract
BACKGROUND It is unclear whether single nucleotide polymorphisms (SNPs) in the gene for IL-13 (IL13) influence asthma severity and/or asthma morbidity. OBJECTIVES To examine the relation between IL13 SNPs and asthma-related phenotypes in 2 independent populations. METHODS We used family-based methods to test for association between SNPs in IL13 and asthma-related phenotypes in Costa Rican children with asthma. We attempted to reproduce significant findings in white (non-Hispanic) children with asthma in the Childhood Asthma Management Program (CAMP). RESULTS In Costa Rica and in CAMP, the A allele (Gln) of IL13 coding SNP (rs20541) was significantly associated with increased eosinophil count (P < .011 in both studies) and increased serum total IgE (P < .054 in both studies). The T allele of IL13 promoter SNP (rs1800925) was inversely associated with asthma exacerbations in Costa Rica (P = .069). Although this SNP (rs1800925) was not associated with asthma exacerbations among all white children in CAMP, it was associated with increased risk of asthma exacerbations among children on inhaled corticosteroids (P = .02). CONCLUSION Polymorphisms in IL13 were significantly associated with serum total IgE and eosinophil count in 2 populations. IL13 polymorphisms may also be associated with asthma exacerbations, and this effect may be dependent on medication use. Our study is the first to report a potential negative interaction between a genetic polymorphism and response to inhaled corticosteroids. CLINICAL IMPLICATIONS Polymorphisms in IL13 are associated with serum total IgE and eosinophil count and may be associated with asthma exacerbations.
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Affiliation(s)
- Gary M Hunninghake
- Channing Laboratory; Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
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Szczepankiewicz A, Breborowicz A, Skibińska M, Wiłkość M, Tomaszewska M, Hauser J. Association analysis of brain-derived neurotrophic factor gene polymorphisms in asthmatic children. Pediatr Allergy Immunol 2007; 18:293-7. [PMID: 17584309 DOI: 10.1111/j.1399-3038.2007.00525.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) has been described to modulate airway hyper-responsiveness and inflammation and was involved in late allergic reaction in asthma and higher levels of circulating BDNF were present in allergic asthmatics. In BDNF gene, Val66Met and C-270T polymorphisms were described. There were, however, very few studies analyzing BDNF gene polymorphisms in asthma. The aim of this study was to analyze the possible relationship between these two polymorphisms in the BDNF gene and asthma. Fifty-six pediatric asthmatic patients were analyzed, aged from 6 to 18. The diagnosis of atopic asthma was based on clinical manifestation, lung function test and increased immunoglobulin E level, and/or positive skin prick tests. The control group consisted of 109 healthy subjects. The polymorphisms were genotyped with the use of polymerase chain reaction-restriction fragment length polymorphism method. We did not observe an association of Val/Met polymorphism and the presence of asthma. However, we observed that Val allele is much more frequent in the male group of asthmatic patients (p = 0.06). For -270C/T polymorphism, we found significant differences between asthmatic patients and the control group (p = 0.041 for genotypes and p = 0.005 for alleles). The results may suggest a relationship between the BDNF gene and asthma and male gender of asthmatic children.
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Affiliation(s)
- Aleksandra Szczepankiewicz
- Department of Pediatric Pulmonology, Allergy and Clinical Immunology, IIIrd Department of Pediatrics, Poznan University of Medical Sciences, Poznan, Poland.
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40
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Bouzigon E, Ulgen A, Dizier MH, Siroux V, Lathrop M, Kauffmann F, Pin I, Demenais F. Evidence for a pleiotropic QTL on chromosome 5q13 influencing both time to asthma onset and asthma score in French EGEA families. Hum Genet 2007; 121:711-9. [PMID: 17473937 DOI: 10.1007/s00439-007-0363-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2006] [Accepted: 03/25/2007] [Indexed: 11/29/2022]
Abstract
Although many genome screens have been conducted for asthma as a binary trait, there is limited information regarding the genetic factors underlying variation of asthma expression. Phenotypes related to variable disease expression include time to asthma onset and variation in clinical expression as measured by an asthma score built from EGEA data. A recent genome scan conducted for this score led to detection of a new region (18p11) not revealed by analysis of dichotomous asthma. Our goal was to characterize chromosomal regions harboring genes underlying time to asthma onset and to search for pleiotropic QTL influencing both time to asthma onset and the asthma score. We conducted a genome-wide linkage screen for time to asthma onset, modeled by martingale residuals from Cox survival model, in EGEA families with at least two asthmatic sibs. This was followed by a bivariate linkage scan of these residuals and asthma score. Univariate linkage analysis was performed using the Maximum Likelihood Binomial method that we extended to bivariate analysis. This screen revealed two regions potentially linked to time to asthma onset, 1p31 (LOD = 1.70, P = 0.003) and 5q13 (LOD = 1.87, P = 0.002). Bivariate linkage analysis led to a substantial improvement of the linkage signal on 5q13 (P = 0.00007), providing evidence for a pleiotropic QTL influencing both variation of time to asthma onset and of clinical expression. Use of quantitative phenotypes of variable disease expression and suitable statistical methodology can improve the power to detect new regions harboring genes which may play an important role in onset and course of disease.
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Affiliation(s)
- Emmanuelle Bouzigon
- INSERM, U794, Tour Evry 2, 523 Place des Terrasses de l'Agora, 91034 Evry, France.
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41
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Kajekar R. Environmental factors and developmental outcomes in the lung. Pharmacol Ther 2007; 114:129-45. [PMID: 17408750 DOI: 10.1016/j.pharmthera.2007.01.011] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Accepted: 01/12/2007] [Indexed: 11/26/2022]
Abstract
The developing lung is highly susceptible to damage from exposure to environmental toxicants particularly due to the protracted maturation of the respiratory system, extending from the embryonic phase of development in utero through to adolescence. The functional organization of the lungs requires a coordinated ontogeny of critical developmental processes that include branching morphogenesis, cellular differentiation and proliferation, alveolarization, and maturation of the pulmonary immune, vasculature, and neural systems. Therefore, exposure to environmental pollutants during crucial periods of prenatal and/or postnatal development may determine the course of lung morphogenesis and maturation. Depending on the timing of exposure and pathobiological response of the affected tissue, exposure to environmental pollutants can potentially result in long-term alterations that affect the structure and function of the respiratory system. Besides an immature respiratory system at birth, children possess unique differences in their physiology and behavioral characteristics compared to adults that are believed to augment the vulnerability of their developing lungs to perturbations by environmental toxins. Furthermore, an interaction between genetic predisposition and increased opportunity for exposure to chemical and infectious disease increase the hazards and risks for infants and children. In this article, the evidence for perturbations of lung developmental processes by key ambient pollutants (environmental tobacco smoke [ETS], ozone, and particulate matter [PM]) are discussed in terms of biological factors that are intrinsic to infants and children and that influence exposure-related lung development and respiratory outcomes.
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Affiliation(s)
- Radhika Kajekar
- Immunobiology, Centocor, 145 King of Prussia Road, Radnor, PA 19087, USA.
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42
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Battle NC, Choudhry S, Tsai HJ, Eng C, Kumar G, Beckman KB, Naqvi M, Meade K, Watson HG, Lenoir M, Burchard EG. Ethnicity-specific gene-gene interaction between IL-13 and IL-4Ralpha among African Americans with asthma. Am J Respir Crit Care Med 2007; 175:881-7. [PMID: 17303794 PMCID: PMC1899298 DOI: 10.1164/rccm.200607-992oc] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
RATIONALE Genes in the interleukin (IL)-4/IL-13/IL-4Ralpha pathway have been shown to be associated with asthma and related phenotypes in some populations, but not in others. Furthermore, interaction between these genes has been shown to affect asthma in white and Chinese populations. OBJECTIVES To determine whether there are IL-4/IL-13 and IL-4Ralpha gene-gene interactions that are associated with asthma in African Americans. METHODS Eighteen single-nucleotide polymorphisms (SNPs) in IL-4, IL-13, and IL-4Ralpha genes were genotyped in 264 African Americans with asthma and 176 healthy control subjects. We tested the SNPs for genetic associations and gene-gene interactions with asthma, baseline lung function, bronchodilator drug response, and total serum IgE levels. MEASUREMENTS AND MAIN RESULTS We identified 94 SNPs in IL-4, IL-13, and IL-4Ralpha genes by directly sequencing these genes in 24 African-American subjects with asthma. Seventeen SNPs were analyzed for association with asthma and related phenotypes. We found no evidence of association in the IL-4 gene. One SNP in the IL-13 gene (A-646G, rs2069743) and two SNPs in the IL-4Ralpha gene (A+4679G, rs1805010, and C+22656T, rs1805015) showed association with lung function (both baseline and post-bronchodilator). Although the association between individual SNPs and asthma-related phenotypes differed from previous studies performed in white and Chinese populations, significant gene-gene interaction was found between the IL-13 (A-646G) and IL-4Ralpha (A+4679G) SNPs for baseline lung function among African-American subjects with asthma. CONCLUSIONS Gene-gene interaction between the IL-13 and IL-4Ralpha genes may play an important role in asthma among African Americans.
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Affiliation(s)
- Natalie C Battle
- University of California, San Francisco, San Francisco, CA 94143-2911, USA
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43
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Ramadas R, Sadeghnejad A, Karmaus W, Arshad S, Matthews S, Huebner M, Kim DY, Ewart S. Interleukin-1R antagonist gene and pre-natal smoke exposure are associated with childhood asthma. Eur Respir J 2006; 29:502-8. [PMID: 17107994 PMCID: PMC2366044 DOI: 10.1183/09031936.00029506] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The interleukin-1 receptor antagonist (IL1RN) is a potent anti-inflammatory cytokine. In the present study, association of the human IL1RN gene polymorphisms with asthma, bronchial hyperresponsiveness and forced expiratory volume in one second/forced vital capacity ratio was tested and the data was stratified by environmental tobacco smoke exposure in order to investigate a gene-smoking interaction. In an unselected subset (n = 921) of the Isle of Wight birth (UK) cohort, which has previously been evaluated for asthma and related manifestations at ages 1, 2, 4 and 10 yrs, three IL1RN single nucleotide polymorphisms (SNP) were genotyped. Logistic regression and repeated measurement models for tests of association using a representative SNP rs2234678 were used, as all SNPs tested were in strong linkage disequilibrium. In the overall analysis, the SNP rs2234678 was not associated with asthma. However, in the stratum with maternal smoking during pregnancy the rs2234678 GG genotype significantly increased the relative risk of asthma in children, both in analyses of repeated asthma occurrences and persistent asthma. In conclusion, the present results show that in the first decade of life, the gene-environment interaction of the interleukin-1 receptor antagonist gene polymorphism rs2234678 and maternal smoking during pregnancy increased the risk for childhood asthma.
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Affiliation(s)
- R.A. Ramadas
- Comparative Medicine and Integrative Biology Graduate Programme, Michigan State University, East Lansing, MI
| | - A. Sadeghnejad
- Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - W. Karmaus
- Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - S.H. Arshad
- David Hide Asthma and Allergy Research Centre, St Mary’s Hospital, Newport, Isle of Wight, UK
| | - S. Matthews
- David Hide Asthma and Allergy Research Centre, St Mary’s Hospital, Newport, Isle of Wight, UK
| | - M. Huebner
- Statistics and Probability, Michigan State University, East Lansing, MI
| | - D-Y. Kim
- Statistics and Probability, Michigan State University, East Lansing, MI
| | - S.L. Ewart
- Depts of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI
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44
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Hersh CP, Soto-Quirós ME, Avila L, Lake SL, Liang C, Fournier E, Spesny M, Sylvia JS, Lazarus R, Hudson T, Verner A, Klanderman BJ, Freimer NB, Silverman EK, Celedón JC. Genome-wide linkage analysis of pulmonary function in families of children with asthma in Costa Rica. Thorax 2006; 62:224-30. [PMID: 17099076 PMCID: PMC2117166 DOI: 10.1136/thx.2006.067934] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Although asthma is highly prevalent among certain Hispanic subgroups, genetic determinants of asthma and asthma-related traits have not been conclusively identified in Hispanic populations. A study was undertaken to identify genomic regions containing susceptibility loci for pulmonary function and bronchodilator responsiveness (BDR) in Costa Ricans. METHODS Eight extended pedigrees were ascertained through schoolchildren with asthma in the Central Valley of Costa Rica. Short tandem repeat (STR) markers were genotyped throughout the genome at an average spacing of 8.2 cM. Multipoint variance component linkage analyses of forced expiratory volume in 1 second (FEV(1)) and FEV(1)/ forced vital capacity (FVC; both pre-bronchodilator and post-bronchodilator) and BDR were performed in these eight families (pre-bronchodilator spirometry, n = 640; post-bronchodilator spirometry and BDR, n = 624). Nine additional STR markers were genotyped on chromosome 7. Secondary analyses were repeated after stratification by cigarette smoking. RESULTS Among all subjects, the highest logarithm of the odds of linkage (LOD) score for FEV(1) (post-bronchodilator) was found on chromosome 7q34-35 (LOD = 2.45, including the additional markers). The highest LOD scores for FEV(1)/FVC (pre-bronchodilator) and BDR were found on chromosomes 2q (LOD = 1.53) and 9p (LOD = 1.53), respectively. Among former and current smokers there was near-significant evidence of linkage to FEV(1)/FVC (post-bronchodilator) on chromosome 5p (LOD = 3.27) and suggestive evidence of linkage to FEV(1) on chromosomes 3q (pre-bronchodilator, LOD = 2.74) and 4q (post-bronchodilator, LOD = 2.66). CONCLUSIONS In eight families of children with asthma in Costa Rica, there is suggestive evidence of linkage to FEV(1) on chromosome 7q34-35. In these families, FEV(1)/FVC may be influenced by an interaction between cigarette smoking and a locus (loci) on chromosome 5p.
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Affiliation(s)
- Craig P Hersh
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA
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45
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Ober C, Pan L, Phillips N, Parry R, Kurina LM. Sex-specific genetic architecture of asthma-associated quantitative trait loci in a founder population. Curr Allergy Asthma Rep 2006; 6:241-6. [PMID: 16579875 DOI: 10.1007/s11882-006-0041-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Identifying genes that influence susceptibility to asthma-related and atopy-related phenotypes has been challenging, owing to clinical heterogeneity and a complex underlying genetic architecture that includes both gene-gene and gene-environment interactions. In this article, we report the results of genome-wide linkage and association studies of eight asthma-associated quantitative traits in the Hutterites, a founder population of European descent. Our study revealed significant sex-specific genetic architecture for at least five of these traits, and identified 13 genome-wide significant quantitative trait loci (QTL) by linkage or association that are present in only one of the sexes (nine in males, four in females).
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Affiliation(s)
- Carole Ober
- Department of Human Genetics, The University of Chicago, 920 E. 58th Street, Chicago, IL 60637, USA.
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46
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Affiliation(s)
- Sally E Wenzel
- National Jewish Medical and Research Center for Immunology, Denver, Colorado, USA.
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47
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Hawkins GA, Tantisira K, Meyers DA, Ampleford EJ, Moore WC, Klanderman B, Liggett SB, Peters SP, Weiss ST, Bleecker ER. Sequence, haplotype, and association analysis of ADRbeta2 in a multiethnic asthma case-control study. Am J Respir Crit Care Med 2006; 174:1101-9. [PMID: 16931635 PMCID: PMC2648111 DOI: 10.1164/rccm.200509-1405oc] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE The comprehensive evaluation of gene variation, haplotype structure, and linkage disequilibrium is important in understanding the function of beta2-adrenergic receptor gene (ADRbeta2) on disease susceptibility, pulmonary function, and therapeutic responses in different ethnic groups with asthma. OBJECTIVES To identify ADRbeta2 polymorphisms and haplotype structure in white and African American subjects and to test for genotype and haplotype association with asthma phenotypes. METHODS A 5.3-kb region of ADRbeta2 was resequenced in 669 individuals from 429 whites and 240 African Americans. A total of 12 polymorphisms, representing an optimal haplotype tagging set, were genotyped in whites (338 patients and 326 control subjects) and African Americans (222 patients and 299 control subjects). RESULTS A total of 49 polymorphisms were identified, 21 of which are novel; 31 polymorphisms (frequency > 0.03) were used to identify 24 haplotypes (frequency > 0.01) and assess linkage disequilibrium. Association with ratio (FEV1/FVC)2 for single-nucleotide polymorphism +79 (p < 0.05) was observed in African Americans. Significant haplotype association for (FEV1/FVC)2 was also observed in African Americans. CONCLUSIONS There are additional genetic variants besides +46 (Gly16Arg) that are important in determining asthma phenotypes. These data suggest that the length of a poly-C repeat (+1269) in the 3' untranslated region of ADRbeta2 may influence lung function, and may be important in delineating variation in beta-agonist responses, especially in African Americans.
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Affiliation(s)
- Gregory A Hawkins
- Center for Human Genomics, Wake Forest University Health Sciences, Winston-Salem, NC 27157, USA
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Ferreira MAR, O'Gorman L, Le Souëf P, Burton PR, Toelle BG, Robertson CF, Visscher PM, Martin NG, Duffy DL. Robust estimation of experimentwise P values applied to a genome scan of multiple asthma traits identifies a new region of significant linkage on chromosome 20q13. Am J Hum Genet 2005; 77:1075-85. [PMID: 16380917 PMCID: PMC1285164 DOI: 10.1086/497997] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Accepted: 09/08/2005] [Indexed: 11/03/2022] Open
Abstract
Over 30 genomic regions show linkage to asthma traits. Six asthma genes have been cloned, but the putative loci in many linked regions have not been identified. To search for asthma susceptibility loci, we performed genomewide univariate linkage analyses of seven asthma traits, using 202 Australian families ascertained through a twin proband. House-dust mite sensitivity (Dpter) exceeded the empirical threshold for significant linkage at 102 cM on chromosome 20q13, near marker D20S173 (empirical pointwise P = .00001 and genomewide P = .005, both uncorrected for multiple-trait testing). Atopy, bronchial hyperresponsiveness (BHR), and forced expiratory volume in 1 s (FEV1) were also linked to this region. In addition, 16 regions were linked to at least one trait at the suggestive level, including 12q24, which has consistently shown linkage to asthma traits in other studies. Some regions were expected to be false-positives arising from multiple-trait testing. To address this, we developed a new approach to estimate genomewide significance that accounts for multiple-trait testing and for correlation between traits and that does not require a Bonferroni correction. With this approach, Dpter remained significantly linked to 20q13 (empirical genomewide P = .042), and airway obstruction remained linked to 12q24 at the suggestive level. Finally, we extended this method to show that the linkage of Dpter, atopy, BHR, FEV1, asthma, and airway obstruction to chromosome 20q13 is unlikely to be due to chance and may result from a quantitative trait locus in this region that affects several of these traits.
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