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Ugalde IC, Ratigan A, Merriman C, Cui J, Ericson B, Busse P, Carroll JK, Casale T, Celedón JC, Coyne-Beasley T, Fagan M, Fuhlbrigge AL, Villarreal GG, Hernandez PA, Jariwala S, Kruse J, Maher NE, Manning B, Mosnaim G, Nazario S, Pace WD, Phipatanakul W, Pinto-Plata V, Riley I, Rodriguez-Louis J, Salciccioli J, Shenoy K, Shields JB, Tarabichi Y, Sosa BT, Wechsler ME, Wisnivesky J, Yawn B, Israel E, Cardet JC. Preference for and impact of telehealth vs in-person asthma visits among Black and Latinx adults. Ann Allergy Asthma Immunol 2023; 131:614-627.e2. [PMID: 37490981 PMCID: PMC10803643 DOI: 10.1016/j.anai.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/09/2023] [Accepted: 07/14/2023] [Indexed: 07/27/2023]
Abstract
BACKGROUND Black and Latinx adults experience disproportionate asthma-related morbidity and limited specialty care access. The severe acute respiratory syndrome coronavirus 2 pandemic expanded telehealth use. OBJECTIVE To evaluate visit type (telehealth [TH] vs in-person [IP]) preferences and the impact of visit type on asthma outcomes among Black and Latinx adults with moderate-to-severe asthma. METHODS For this PREPARE trial ancillary study, visit type preference was surveyed by e-mail or telephone post-trial. Emergency medical record data on visit types and asthma outcomes were available for a subset (March 2020 to April 2021). Characteristics associated with visit type preferences, and relationships between visit type and asthma outcomes (control [Asthma Control Test] and asthma-related quality of life [Asthma Symptom Utility Index]), were tested using multivariable regression. RESULTS A total of 866 participants consented to be surveyed, with 847 respondents. Among the participants with asthma care experience with both visit types, 42.0% preferred TH for regular checkups, which associated with employment (odds ratio [OR] = 1.61; 95% confidence interval [CI], 1.09-2.39; P = .02), lower asthma medication adherence (OR = 1.06; 95% CI, 1.01-1.11; P = .03), and having more historical emergency department and urgent care asthma visits (OR = 1.10 for each additional visit; 95% CI, 1.02-1.18; P = .02), after adjustment. Emergency medical record data were available for 98 participants (62 TH, 36 IP). Those with TH visits were more likely Latinx, from the Southwest, employed, using inhaled corticosteroid-only controller therapy, with lower body mass index, and lower self-reported asthma medication adherence vs those with IP visits only. Both groups had comparable Asthma Control Test (18.4 vs 18.9, P = .52) and Asthma Symptom Utility Index (0.79 vs 0.84, P = .16) scores after adjustment. CONCLUSION TH may be similarly efficacious as and often preferred over IP among Black and Latinx adults with moderate-to-severe asthma, especially for regular checkups. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02995733.
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Affiliation(s)
- Israel C Ugalde
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | | | - Conner Merriman
- Division of Allergy and Immunology, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Jing Cui
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Brianna Ericson
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Paula Busse
- Division of Allergy & Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Jennifer K Carroll
- CU Anschutz Department of Family Medicine, University of Colorado, Aurora, Colorado; American Academy of Family Physicians National Research Network, Leawood, Kansas
| | - Thomas Casale
- Division of Allergy and Immunology, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Juan Carlos Celedón
- Division of Pediatric Pulmonary Medicine, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Tamera Coyne-Beasley
- Division of Adolescent Medicine, Department of Pediatrics, The University of Alabama at Birmingham, Birmingham, Alabama
| | - Maureen Fagan
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Anne L Fuhlbrigge
- Department of Medicine, Pulmonary Science and Critical Care Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | | | - Paulina Arias Hernandez
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Sunit Jariwala
- Division of Allergy & Immunology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York
| | - Jean Kruse
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Nancy E Maher
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Brian Manning
- American Academy of Family Physicians National Research Network, Leawood, Kansas
| | - Giselle Mosnaim
- Division of Allergy & Immunology, Department of Medicine, NorthShore University Health System, Evanston, Illinois
| | - Sylvette Nazario
- Division of Allergy and Immunology, Department of Internal Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Wilson D Pace
- DARTNet Institute, Aurora, Colorado; American Academy of Family Physicians National Research Network, Leawood, Kansas
| | - Wanda Phipatanakul
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Victor Pinto-Plata
- Division of Pulmonary Critical Care, Department of Medicine, Lahey Hospital and Medical Center, Tufts University School of Medicine, Boston, Massachusetts
| | - Isaretta Riley
- Division of Pulmonary, Allergy & Critical Care Medicine, Duke University School of Medicine, Durham, North Carolina
| | | | - Justin Salciccioli
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kartik Shenoy
- Department of Thoracic Medicine and Surgery, Temple University Health Systems, Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Joel B Shields
- American Academy of Family Physicians National Research Network, Leawood, Kansas
| | - Yasir Tarabichi
- Center for Clinical Informatics Research and Education, MetroHealth, Cleveland, Ohio
| | - Bonnie Telon Sosa
- Division of Allergy and Immunology, Department of Internal Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Michael E Wechsler
- Division of Pulmonology, Critical Care and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado
| | - Juan Wisnivesky
- Divisions of General Internal Medicine and Pulmonary and Critical Care Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Barbara Yawn
- Department of Family and Community Health, University of Minnesota, Minneapolis, Minnesota
| | - Elliot Israel
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts; Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Juan Carlos Cardet
- Division of Allergy and Immunology, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida.
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Herrera-Luis E, Forno E, Celedón JC, Pino-Yanes M. Asthma Exacerbations: The Genes Behind the Scenes. J Investig Allergol Clin Immunol 2023; 33:76-94. [PMID: 36420738 PMCID: PMC10638677 DOI: 10.18176/jiaci.0878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The clinical and socioeconomic burden of asthma exacerbations (AEs) constitutes a major public health problem. In the last 4 years, there has been an increase in ethnic diversity in candidate-gene and genome-wide association studies of AEs, which in the latter case led to the identification of novel genes and underlying pathobiological processes. Pharmacogenomics, admixture mapping analyses, and the combination of multiple "omics" layers have helped to prioritize genomic regions of interest and/or facilitated our understanding of the functional consequences of genetic variation. Nevertheless, the field still lags behind the genomics of asthma, where a vast compendium of genetic approaches has been used (eg, gene-environment nteractions, next-generation sequencing, and polygenic risk scores). Furthermore, the roles of the DNA methylome and histone modifications in AEs have received little attention, and microRNA findings remain to be validated in independent studies. Likewise, the most recent transcriptomic studies highlight the importance of the host-airway microbiome interaction in the modulation of risk of AEs. Leveraging -omics and deep-phenotyping data from subtypes or homogenous subgroups of patients will be crucial if we are to overcome the inherent heterogeneity of AEs, boost the identification of potential therapeutic targets, and implement precision medicine approaches to AEs in clinical practice.
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Affiliation(s)
- E Herrera-Luis
- Genomics and Health Group, Department of Biochemistry, Microbiology, Cell Biology and Genetics, Universidad de La Laguna (ULL), La Laguna, Tenerife, Spain
| | - E Forno
- Division of Pediatric Pulmonary Medicine, UPMC Children´s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - J C Celedón
- Division of Pediatric Pulmonary Medicine, UPMC Children´s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - M Pino-Yanes
- Genomics and Health Group, Department of Biochemistry, Microbiology, Cell Biology and Genetics, Universidad de La Laguna (ULL), La Laguna, Tenerife, Spain
- CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain 4 Instituto de Tecnologías Biomédicas (ITB), Universidad de La Laguna (ULL), La Laguna, Tenerife, Spain
- Instituto de Tecnologías Biomédicas (ITB), Universidad de La Laguna (ULL), La Laguna, Tenerife, Spain
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Cardet JC, Shenoy K, Baydur A, Carroll JK, Celedón JC, Cui J, Dara P, Ericson B, Forth VE, Fagan M, Fuhlbrigge AL, Gupta R, Hart MK, Hernandez ML, Hernandez PA, Kruse J, Maher NE, Manning BK, Pinto-Plata VM, Robles J, Rodriguez-Louis J, Shields JB, Telon Sosa BS, Wechsler ME, Israel E. Caribbean Latinx with moderate-severe asthma bear greater asthma morbidity than other Latinx. J Allergy Clin Immunol 2022; 150:1106-1113.e10. [PMID: 35779669 PMCID: PMC9643605 DOI: 10.1016/j.jaci.2022.05.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/08/2022] [Accepted: 05/17/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Hispanic/Latinx (HL) ethnicity encompasses racially and culturally diverse subgroups. Studies suggest that Puerto Ricans (PR) may bear greater asthma-related morbidity than Mexicans, but these were conducted in children or had limited clinical characterization. OBJECTIVES This study sought to determine whether disparities in asthma morbidity exist among HL adult subgroups. METHODS Adults with moderate-severe asthma were recruited from US clinics, including from Puerto Rico, for the Person Empowered Asthma Relief (PREPARE) trial. Considering the shared heritage between PR and other Caribbean HL (Cubans and Dominicans [C&D]), the investigators compared baseline self-reported clinical characteristics between Caribbean HL (CHL) (PR and C&D: n = 457) and other HLs (OHL) (Mexicans, Spaniards, Central/South Americans; n = 141), and between CHL subgroups (C&D [n = 56] and PR [n = 401]). This study compared asthma morbidity measures (self-reported exacerbations requiring systemic corticosteroids, emergency department/urgent care (ED/UC) visits, hospitalizations, health care utilization) through negative binomial regression. RESULTS CHL compared to OHL were similar in age, body mass index, poverty status, blood eosinophils, and fractional exhaled nitric oxide but were prescribed more asthma controller therapies. Relative to OHL, CHL had significantly increased odds of asthma exacerbations (odds ratio [OR]: 1.84; 95% CI: 1.4-2.4), ED/UC visits (OR: 1.88; 95% CI: 1.4-2.5), hospitalization (OR: 1.98; 95% CI: 1.06-3.7), and health care utilization (OR: 1.91; 95% CI: 1.44-2.53). Of the CHL subgroups, PR had significantly increased odds of asthma exacerbations, ED/UC visits, hospitalizations, and health care utilization compared to OHL, whereas C&D only had increased odds of exacerbations compared to OHL. PR compared to C&D had greater odds of ED/UC and health care utilization. CONCLUSIONS CHL adults, compared with OHL, adults reported nearly twice the asthma morbidity; these differences are primarily driven by PR. Novel interventions are needed to reduce morbidity in this highly impacted population.
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Affiliation(s)
- Juan Carlos Cardet
- Division of Allergy and Immunology, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Fla
| | - Kartik Shenoy
- Temple Lung Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pa
| | - Ahmet Baydur
- Division of Pulmonary, Critical Care and Sleep Medicine, Keck School of Medicine, University of Southern California, Los Angeles, Calif
| | - Jennifer K Carroll
- American Academy of Family Physicians National Research Network, Leawood, Kan; Department of Family Medicine, University of Colorado School of Medicine, University of Colorado, Aurora, Colo
| | - Juan Carlos Celedón
- Division of Pediatric Pulmonary Medicine, University of Pittsburgh, Pittsburgh, Pa
| | - Jing Cui
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass
| | - Prajwal Dara
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Fla
| | - Brianna Ericson
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Victoria E Forth
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | | | - Anne L Fuhlbrigge
- Department of Medicine, Pulmonary Science and Critical Care Medicine, University of Colorado School of Medicine, University of Colorado, Aurora, Colo
| | - Rohit Gupta
- Temple Lung Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pa
| | | | - Michelle L Hernandez
- Division of Allergy and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Paulina Arias Hernandez
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Jean Kruse
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Nancy E Maher
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Brian K Manning
- American Academy of Family Physicians National Research Network, Leawood, Kan
| | - Victor M Pinto-Plata
- Division of Pulmonary and Critical Care Medicine, Lahey Hospital and Medical Center, Burlington, Mass
| | | | | | - Joel B Shields
- American Academy of Family Physicians National Research Network, Leawood, Kan
| | - Bonnie S Telon Sosa
- Department of Internal Medicine, Allergy/Immunology Section, University of Puerto Rico: Medical Sciences Campus, San Juan, Puerto Rico
| | - Michael E Wechsler
- Department of Medicine, NJH Cohen Family Asthma Institute, National Jewish Health, Denver, Colo
| | - Elliot Israel
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass.
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Cardet JC, Chang KL, Rooks BJ, Carroll JK, Celedón JC, Coyne-Beasley T, Cui J, Ericson B, Forth VE, Fagan M, Fuhlbrigge AL, Hernandez PA, Kruse J, Louisias M, Maher NE, Manning B, Pace WD, Phipatanakul W, Rodriguez-Louis J, Shields JB, Israel E, Wisnivesky JP. Socioeconomic status associates with worse asthma morbidity among Black and Latinx adults. J Allergy Clin Immunol 2022; 150:841-849.e4. [PMID: 35597370 PMCID: PMC9724153 DOI: 10.1016/j.jaci.2022.04.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/11/2022] [Accepted: 04/21/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Asthma disproportionately affects African American/Black (AA/B) and Hispanic/Latinx (H/L) patients and individuals with low socioeconomic status (SES), but the relationship between SES and asthma morbidity within these racial/ethnic groups is inadequately understood. OBJECTIVE To determine the relationship between SES and asthma morbidity among AA/B and H/L adults with moderate to severe asthma using multidomain SES frameworks and mediation analyses. METHODS We analyzed enrollment data from the PeRson EmPowered Asthma RElief randomized trial, evaluating inhaled corticosteroid supplementation to rescue therapy. We tested for direct and indirect relationships between SES and asthma morbidity using structural equation models. For SES, we used a latent variable defined by poverty, education, and unemployment. For asthma morbidity, we used self-reported asthma exacerbations in the year before enrollment (corticosteroid bursts, emergency room/urgent care visits, or hospitalizations), and Asthma Control Test scores. We tested for mediation via health literacy, perceived stress, and self-reported discrimination. All models adjusted for age, sex, body mass index, ethnicity, and comorbidities. RESULTS Among 990 AA/B and H/L adults, low SES (latent variable) was directly associated with hospitalizations (β = 0.24) and worse Asthma Control Test scores (β = 0.20). Stress partially mediated the relationship between SES and increased emergency room/urgent care visits and worse asthma control (β = 0.03 and = 0.05, respectively). Individual SES domains were directly associated with asthma morbidity. Stress mediated indirect associations between low educational attainment and unemployment with worse asthma control (β = 0.05 and = 0.06, respectively). CONCLUSIONS Lower SES is directly, and indirectly through stress, associated with asthma morbidity among AA/B and H/L adults. Identification of stressors and relevant management strategies may lessen asthma-related morbidity among these populations.
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Affiliation(s)
- Juan Carlos Cardet
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Fla
| | - Ku-Lang Chang
- Department of Community Health and Family Medicine, University of Florida College of Medicine, Gainesville, Fla
| | - Benjamin J Rooks
- Department of Community Health and Family Medicine, University of Florida College of Medicine, Gainesville, Fla
| | - Jennifer K Carroll
- American Academy of Family Physicians, National Research Network, Leawood, Kan; CU Anschutz Department of Family Medicine, University of Colorado, Aurora, Colo
| | - Juan Carlos Celedón
- Division of Pediatric Pulmonary Medicine, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pa
| | - Tamera Coyne-Beasley
- Department of Medicine, University of Alabama at Birmingham, Children's of Alabama, Birmingham
| | - Jing Cui
- Divisions of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass
| | - Brianna Ericson
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Victoria E Forth
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Mass
| | | | - Anne L Fuhlbrigge
- Department of Medicine, Pulmonary Science and Critical Care Medicine, University of Colorado School of Medicine, Aurora, Colo
| | - Paulina Arias Hernandez
- Divisions of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass
| | - Jean Kruse
- Divisions of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass
| | - Margee Louisias
- Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass
| | - Nancy E Maher
- Divisions of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass
| | - Brian Manning
- American Academy of Family Physicians, National Research Network, Leawood, Kan
| | - Wilson D Pace
- American Academy of Family Physicians, National Research Network, Leawood, Kan; DARTNet Institute, Aurora, Colo
| | | | | | - Joel B Shields
- American Academy of Family Physicians, National Research Network, Leawood, Kan
| | - Elliot Israel
- Divisions of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Mass; Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass.
| | - Juan P Wisnivesky
- Divisions of General Internal Medicine and Pulmonary and Critical Care Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
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Lee S, Lasky-Su J, Won S, Laurie C, Celedón JC, Lange C, Weiss S, Hecker J. Novel recessive locus for body mass index in childhood asthma. Thorax 2021; 76:1227-1230. [PMID: 33888571 PMCID: PMC8531156 DOI: 10.1136/thoraxjnl-2020-215742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/16/2020] [Accepted: 03/16/2021] [Indexed: 11/03/2022]
Abstract
Most genome-wide association studies of obesity and body mass index (BMI) have so far assumed an additive mode of inheritance in their analysis, although association testing supports a recessive effect for some of the established loci, for example, rs1421085 in FTO In two whole-genome sequencing (WGS) studies of children with asthma and their parents (892 Costa Rican trios and 286 North American trios), we discovered an association between a locus (rs9292139) in LOC102724122 and BMI that reaches genome-wide significance under a recessive model in the combined analysis. As the association does not achieve significance under an additive model, our finding illustrates the benefits of the recessive model in WGS analyses.
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Affiliation(s)
- Sanghun Lee
- Department of Medical Consilience, Division of Medicine, Graduate School, Dankook University-Jukjeon Campus, Yongin, South Korea
| | - Jessica Lasky-Su
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Sungho Won
- Department of Public Health Science, Seoul National University, Gwanak-gu, South Korea
| | - Cecelia Laurie
- Department of Biostatistics, University of Washington, Seattle, Washington, USA
| | - Juan Carlos Celedón
- Division of Pediatric Pulmonary Medicine, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania, USA
| | - Christoph Lange
- Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Scott Weiss
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Julian Hecker
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
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Wang T, Guan W, Lin J, Boutaoui N, Canino G, Luo J, Celedón JC, Chen W. A systematic study of normalization methods for Infinium 450K methylation data using whole-genome bisulfite sequencing data. Epigenetics 2016; 10:662-9. [PMID: 26036609 PMCID: PMC4623491 DOI: 10.1080/15592294.2015.1057384] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
DNA methylation plays an important role in disease etiology. The Illumina Infinium HumanMethylation450 (450K) BeadChip is a widely used platform in large-scale epidemiologic studies. This platform can efficiently and simultaneously measure methylation levels at ∼480,000 CpG sites in the human genome in multiple study samples. Due to the intrinsic chip design of 2 types of chemistry probes, data normalization or preprocessing is a critical step to consider before data analysis. To date, numerous methods and pipelines have been developed for this purpose, and some studies have been conducted to evaluate different methods. However, validation studies have often been limited to a small number of CpG sites to reduce the variability in technical replicates. In this study, we measured methylation on a set of samples using both whole-genome bisulfite sequencing (WGBS) and 450K chips. We used WGBS data as a gold standard of true methylation states in cells to compare the performances of 8 normalization methods for 450K data on a genome-wide scale. Analyses on our dataset indicate that the most effective methods are peak-based correction (PBC) and quantile normalization plus β-mixture quantile normalization (QN.BMIQ). To our knowledge, this is the first study to systematically compare existing normalization methods for Illumina 450K data using novel WGBS data. Our results provide a benchmark reference for the analysis of DNA methylation chip data, particularly in white blood cells.
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Affiliation(s)
- Ting Wang
- a Division of Pulmonary Medicine; Allergy and Immunology; Department of Pediatrics; Children's Hospital of Pittsburgh of UPMC; University of Pittsburgh ; Pittsburgh , PA , USA
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Melén E, Granell R, Kogevinas M, Strachan D, Gonzalez JR, Wjst M, Jarvis D, Ege M, Braun-Fahrländer C, Genuneit J, Horak E, Bouzigon E, Demenais F, Kauffmann F, Siroux V, Michel S, von Berg A, Heinzmann A, Kabesch M, Probst-Hensch NM, Curjuric I, Imboden M, Rochat T, Henderson J, Sterne JAC, McArdle WL, Hui J, James AL, William Musk A, Palmer LJ, Becker A, Kozyrskyj AL, Chan-Young M, Park JE, Leung A, Daley D, Freidin MB, Deev IA, Ogorodova LM, Puzyrev VP, Celedón JC, Brehm JM, Cloutier MM, Canino G, Acosta-Pérez E, Soto-Quiros M, Avila L, Bergström A, Magnusson J, Söderhäll C, Kull I, Scholtens S, Marike Boezen H, Koppelman GH, Wijga AH, Marenholz I, Esparza-Gordillo J, Lau S, Lee YA, Standl M, Tiesler CMT, Flexeder C, Heinrich J, Myers RA, Ober C, Nicolae DL, Farrall M, Kumar A, Moffatt MF, Cookson WOCM, Lasky-Su J. Genome-wide association study of body mass index in 23 000 individuals with and without asthma. Clin Exp Allergy 2013; 43:463-74. [PMID: 23517042 DOI: 10.1111/cea.12054] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 09/28/2012] [Accepted: 10/22/2012] [Indexed: 12/20/2022]
Abstract
BACKGROUND Both asthma and obesity are complex disorders that are influenced by environmental and genetic factors. Shared genetic factors between asthma and obesity have been proposed to partly explain epidemiological findings of co-morbidity between these conditions. OBJECTIVE To identify genetic variants that are associated with body mass index (BMI) in asthmatic children and adults, and to evaluate if there are differences between the genetics of BMI in asthmatics and healthy individuals. METHODS In total, 19 studies contributed with genome-wide analysis study (GWAS) data from more than 23 000 individuals with predominantly European descent, of whom 8165 are asthmatics. RESULTS We report associations between several DENND1B variants (P = 2.2 × 10(-7) for rs4915551) on chromosome 1q31 and BMI from a meta-analysis of GWAS data using 2691 asthmatic children (screening data). The top DENND1B single nucleotide polymorphisms(SNPs) were next evaluated in seven independent replication data sets comprising 2014 asthmatics, and rs4915551 was nominally replicated (P < 0.05) in two of the seven studies and of borderline significance in one (P = 0.059). However, strong evidence of effect heterogeneity was observed and overall, the association between rs4915551 and BMI was not significant in the total replication data set, P = 0.71. Using a random effects model, BMI was overall estimated to increase by 0.30 kg/m(2) (P = 0.01 for combined screening and replication data sets, N = 4705) per additional G allele of this DENND1BSNP. FTO was confirmed as an important gene for adult and childhood BMI regardless of asthma status. CONCLUSIONS AND CLINICAL RELEVANCE DENND1B was recently identified as an asthma susceptibility gene in a GWAS on children, and here, we find evidence that DENND1B variants may also be associated with BMI in asthmatic children. However, the association was overall not replicated in the independent data sets and the heterogeneous effect of DENND1B points to complex associations with the studied diseases that deserve further study.
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Affiliation(s)
- E Melén
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Lasky-Su J, Himes BE, Raby BA, Klanderman BJ, Sylvia JS, Lange C, Melen E, Martinez FD, Israel E, Gauderman J, Gilliland F, Sleiman P, Hakonarson H, Celedón JC, Soto-Quiros M, Avila L, Lima JJ, Irvin CG, Peters SP, Boushey H, Chinchilli VM, Mauger D, Tantisira K, Weiss ST. HLA-DQ strikes again: genome-wide association study further confirms HLA-DQ in the diagnosis of asthma among adults. Clin Exp Allergy 2013. [PMID: 23181788 DOI: 10.1111/cea.12000] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Asthma is a common chronic respiratory disease in children and adults. An important genetic component to asthma susceptibility has long been recognized, most recently through the identification of several genes (e.g., ORMDL3, PDE4D, HLA-DQ, and TLE4) via genome-wide association studies. OBJECTIVE To identify genetic variants associated with asthma affection status using genome-wide association data. METHODS We describe results from a genome-wide association study on asthma performed in 3855 subjects using a panel of 455 089 single nucleotide polymorphisms (SNPs). RESULT The genome-wide association study resulted in the prioritization of 33 variants for immediate follow-up in a multi-staged replication effort. Of these, a common polymorphism (rs9272346) localizing to within 1 Kb of HLA-DQA1 (chromosome 6p21.3) was associated with asthma in adults (P-value = 2.2E-08) with consistent evidence in the more heterogeneous group of adults and children (P-value = 1.0E-04). Moreover, some genes identified in prior asthma GWAS were nominally associated with asthma in our populations. CONCLUSION Overall, our findings further replicate the HLA-DQ region in the pathogenesis of asthma. HLA-DQA1 is the fourth member of the HLA family found to be associated with asthma, in addition to the previously identified HLA-DRA, HLA-DQB1 and HLA-DQA2.
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Affiliation(s)
- J Lasky-Su
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA, USA
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10
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Lange NE, Celedón JC, Forno E, Ly NP, Onderdonk A, Bry L, Delaney ML, DuBois AM, Gold DR, Weiss ST, Litonjua AA. Maternal intestinal flora and wheeze in early childhood. Clin Exp Allergy 2013; 42:901-8. [PMID: 22909161 DOI: 10.1111/j.1365-2222.2011.03950.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Increasing evidence links altered intestinal flora in infancy to eczema and asthma. No studies have investigated the influence of maternal intestinal flora on wheezing and eczema in early childhood. OBJECTIVE To investigate the link between maternal intestinal flora during pregnancy and development of wheeze and eczema in infancy. METHODS A total of 60 pregnant women from the Boston area gave stool samples during the third trimester of their pregnancy and answered questions during pregnancy about their own health, and about their children's health when the child was 2 and 6 months of age. Quantitative culture was performed on stool samples and measured in log(10)colony-forming units (CFU)/gram stool. Primary outcomes included infant wheeze and eczema in the first 6 months of life. Atopic wheeze, defined as wheeze and eczema, was analysed as a secondary outcome. RESULTS In multivariate models adjusted for breastfeeding, day care attendance and maternal atopy, higher counts of maternal total aerobes (TA) and enterococci (E) were associated with increased risk of infant wheeze (TA: OR 2.32 for 1 log increase in CFU/g stool [95% CI 1.22, 4.42]; E: OR 1.57 [95% CI 1.06, 2.31]). No organisms were associated with either eczema or atopic wheeze. CONCLUSIONS AND CLINICAL RELEVANCE In our cohort, higher maternal total aerobes and enterococci were related to increased risk of infant wheeze. Maternal intestinal flora may be an important environmental exposure in early immune system development.
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Affiliation(s)
- N E Lange
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.
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11
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Cohen RT, Celedón JC. Breastfeeding and asthma: where are we? Allergol Immunopathol (Madr) 2011; 39:315-7. [PMID: 22029964 DOI: 10.1016/j.aller.2011.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 09/14/2011] [Indexed: 11/17/2022]
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12
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Hunninghake GM, Soto-Quirós ME, Avila L, Kim HP, Lasky-Su J, Rafaels N, Ruczinski I, Beaty TH, Mathias RA, Barnes KC, Wilk JB, O'Connor GT, Gauderman WJ, Vora H, Baurley JW, Gilliland F, Liang C, Sylvia JS, Klanderman BJ, Sharma SS, Himes BE, Bossley CJ, Israel E, Raby BA, Bush A, Choi AM, Weiss ST, Celedón JC. TSLP polymorphisms are associated with asthma in a sex-specific fashion. Allergy 2010; 65:1566-75. [PMID: 20560908 DOI: 10.1111/j.1398-9995.2010.02415.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) in thymic stromal lymphopoietin (TSLP) have been associated with IgE (in girls) and asthma (in general). We sought to determine whether TSLP SNPs are associated with asthma in a sex-specific fashion. METHODS We conducted regular and sex-stratified analyses of association between SNPs in TSLP and asthma in families of children with asthma in Costa Rica. Significant findings were replicated in whites and African-American participants in the Childhood Asthma Management Program, in African-Americans in the Genomic Research on Asthma in the African Diaspora study, in whites and Hispanics in the Children's Health Study, and in whites in the Framingham Heart Study (FHS). MAIN RESULTS Two SNPs in TSLP (rs1837253 and rs2289276) were significantly associated with a reduced risk of asthma in combined analyses of all cohorts (P values of 2 × 10(-5) and 1 × 10(-5) , respectively). In a sex-stratified analysis, the T allele of rs1837253 was significantly associated with a reduced risk of asthma in males only (P = 3 × 10(-6) ). Alternately, the T allele of rs2289276 was significantly associated with a reduced risk of asthma in females only (P = 2 × 10(-4) ). Findings for rs2289276 were consistent in all cohorts except the FHS. CONCLUSIONS TSLP variants are associated with asthma in a sex-specific fashion.
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Affiliation(s)
- G M Hunninghake
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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13
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Sordillo JE, Hoffman EB, Celedón JC, Litonjua AA, Milton DK, Gold DR. Multiple microbial exposures in the home may protect against asthma or allergy in childhood. Clin Exp Allergy 2010; 40:902-10. [PMID: 20412140 DOI: 10.1111/j.1365-2222.2010.03509.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Experimental animal data on the gram-negative bacterial (GNB) biomarker endotoxin suggest that persistence, dose, and timing of exposure are likely to influence its effects on allergy and wheeze. In epidemiologic studies, endotoxin may be a sentinel marker for a microbial milieu, including gram-positive bacteria (GPB) as well as GNB, that may influence allergy and asthma through components (pathogen-associated molecular patterns) that signal through innate Toll-like receptor pathways. OBJECTIVE To determine the influence of current GNB and GPB exposures on asthma and allergic sensitization in school-aged children. METHODS We examined the relationship between bacterial biomarkers and current asthma and allergic sensitization in 377 school-aged children in a birth cohort study. We then evaluated the effects of school-aged endotoxin, after controlling for exposure in early life. RESULTS Exposure to GNB was inversely associated with asthma and allergic sensitization at school age [for >median endotoxin: prevalence odds ratio (POR)=0.34, 95% CI=0.2-0.7, for current asthma and prevalence ratio=0.77, 95% CI=0.6-0.97, for allergic sensitization]. In contrast, elevated GPB in the bed was inversely associated with current asthma (POR=0.41, 95% CI=0.2-0.9) but not with allergic sensitization (POR=1.07, 95% CI=0.8-1.4). School-aged endotoxin exposure remained protective in models for allergic disease adjusted for early-life endotoxin. CONCLUSION Both GNB and GPB exposures are associated with decreased asthma symptoms, but may act through different mechanisms to confer protection. Endotoxin exposure in later childhood is not simply a surrogate of early-life exposure; it has independent protective effects on allergic disease.
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Abstract
BACKGROUND Risk factors for allergic rhinitis (AR) in asthmatics are likely distinct from those for AR or asthma alone. We sought to identify clinical and environmental risk factors for AR in children with asthma. METHODS We performed a cross-sectional study of 616 Costa Rican children aged 6-14 years with asthma. Candidate risk factors were drawn from questionnaire data, spirometry, methacholine challenge testing, skin testing, and serology. Two outcome measures, skin test reaction (STR)-positive AR and physician-diagnosed AR, were examined by logistic regression. RESULTS STR-positive AR had high prevalence (80%) in Costa Rican children with asthma, and its independent risk factors were nasal symptoms after exposure to dust or mold, parental history of AR, older age at asthma onset, oral steroid use in the past year, eosinophilia, and positive IgEs to dust mite and cockroach. Physician-diagnosed AR had lower prevalence (27%), and its independent risk factors were nasal symptoms after pollen exposure, STR to tree pollens, a parental history of AR, inhaled steroid and short-acting beta2 agonist use in the past year, household mold/mildew, and fewer older siblings. A physician's diagnosis was only 29.5% sensitive for STR-positive AR. CONCLUSIONS Risk factors for AR in children with asthma depend on the definition of AR. Indoor allergens drive risk for STR-positive AR. Outdoor allergens and home environmental conditions are risk factors for physician-diagnosed AR. We propose that children with asthma in Costa Rica and other Latin American nations undergo limited skin testing or specific IgE measurements to reduce the current under-diagnosis of AR.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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16
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Abstract
BACKGROUND Little is known about mouse allergen exposure in home environments and the development of wheezing, asthma and atopy in childhood. OBJECTIVE To examine the relation between mouse allergen exposure and wheezing, atopy, and asthma in the first 7 years of life. METHODS Prospective study of 498 children with parental history of allergy or asthma followed from birth to age 7 years, with longitudinal questionnaire ascertainment of reported mouse exposure and dust sample mouse urinary protein allergen levels measured at age 2-3 months. RESULTS Parental report of mouse exposure in the first year of life was associated with increased risk of transient wheeze and wheezing in early life. Current report of mouse exposure was also significantly associated with current wheeze throughout the first 7 years of life in the longitudinal analysis (P = 0.03 for overall relation of current mouse to current wheeze). However, early life mouse exposure did not predict asthma, eczema or allergic rhinitis at age 7 years. Exposure to detectable levels of mouse urinary protein in house dust samples collected at age 2-3 months was associated with a twofold increase in the odds of atopy (sensitization to >=1 allergen) at school age (95% confidence interval for odds ratio = 1.1-3.7; P = 0.03 in a multivariate analysis. CONCLUSIONS Among children with parental history of asthma or allergies, current mouse exposure is associated with increased risk of wheeze during the first 7 years of life. Early mouse exposure was associated with early wheeze and atopy later in life.
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Affiliation(s)
- W Phipatanakul
- Department of Pediatrics, Division of Allergy and Immunology, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
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Abstract
Interleukin17F (IL17F) is a regulatory cytokine for T-cell-mediated immune responses. The gene coding for IL17F (IL17F) is located on chromosome 6p, a genomic region linked to asthma and asthma-related phenotypes in multiple genome scans. IL17F is expressed in lung tissue, in bronchoalveolar lavage fluid from asthmatic subjects, and in activated CD4+ cells. We were thus interested in testing for association between single-nucleotide polymorphisms (SNPs) and haplotypes in IL17F and asthma. To characterize polymorphisms in IL17F, we sequenced this gene in a group of African Americans and a group of European Americans. A total of 50 SNPs (30 not previously reported in a public database (dbSNP build 118)) and two insertions/deletions were detected in IL17F; five of these polymorphisms were genotyped in participants of the Nurses' Health Study. We then tested for association between SNPs and haplotypes in IL17F and physician-diagnosed asthma in subjects with (cases) and without (control subjects) physician-diagnosed asthma. None of the SNPs or haplotypes tested in IL17F were associated with asthma. The polymorphisms identified in this study may be used in future studies of association between IL17F and phenotypes related to immune responses.
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Affiliation(s)
- C D Ramsey
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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18
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Abstract
BACKGROUND Mouse allergen exposure is prevalent among urban children with asthma. Little is known about mouse allergen exposure in children at risk for the development of allergic diseases. AIMS OF THE STUDY To assess indoor mouse allergen exposure in early life among children with parental history of asthma or allergies. METHODS Prospective birth cohort study of 498 children with a history of allergy or asthma in at least one parent living in metropolitan Boston. RESULTS Of the 498 participating children, 357 (71.7%) resided outside the city of Boston and 439 (90.7%) lived in households with incomes > 30,000 dollars. Mouse allergen was detected in 42% of the homes of study participants. In a multivariate analysis adjusting for sex, income, and endotoxin, black race [odds ratio (OR) = 3.0; 95% confidence interval (CI) = 1.3-6.6, P = 0.009], signs of mice in the home at age 2-3 months (OR = 3.0; 95% CI = 1.6-5.6, P = 0.0006), and kitchen cockroach allergen levels > or = 0.05 to < 2 U/g (OR = 1.8; 95% CI = 1.1-3.2, P = 0.02) were associated with detectable mouse allergen in the kitchen. In this model, living in a single detached house was inversely associated with detectable kitchen mouse allergen levels (OR = 0.4; 95% CI = 0.2-0.6, P = 0.0001). CONCLUSION Infants with a parental history of asthma or allergies are commonly exposed to mouse allergen in their homes. Among infants at high risk for atopy, predictors of increased mouse allergen levels included black race, reported mice exposure, and moderate levels of cockroach allergen.
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Affiliation(s)
- W Phipatanakul
- Department of Pediatrics, Division of Allergy and Immunology, Children's Hospital, Boston, MA USA
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19
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Abstract
BACKGROUND An association between antibiotic use in early life and asthma in childhood has been reported in five retrospective studies and one longitudinal study. OBJECTIVE To examine the relation between the use of oral antibiotics in the first year of life and asthma in early childhood. METHODS Longitudinal follow-up of 4408 children enrolled in a health maintenance organization (HMO) from birth to the age of 5 years. RESULTS After adjusting for sex and illnesses of the lower respiratory tract (LRIs), we found a significant association between antibiotic use in the first year of life and asthma between the ages of 1 and 2 years (odds ratio (OR) for 1-2 vs. no courses of antibiotics=1.9, 95% confidence interval (CI)=1.3-2.7; OR for 3-4 vs. no courses of antibiotics=1.6, 95% CI=1.1-2.4; OR for at least 5 vs. no courses of antibiotics=2.1, 95% CI=1.5-3.2). After adjustment for sex and LRIs in the first year of life, there was no significant association between antibiotic use in the first year of life and asthma that was initially diagnosed between the ages of 2 and 5 years and that persisted up to the age of 5 years (OR for 1-2 vs. no courses of antibiotics=1.1, 95% CI=0.8-1.4; OR for 3-4 vs. no courses of antibiotics=1.3, 95% CI=0.9-1.8; OR for at least 5 vs. no courses of antibiotics=1.0, 95% CI=0.7-1.4). Conclusions Our findings do not support the hypothesis that antibiotic use in early life is associated with the subsequent development of asthma in childhood but rather suggest that frequent antibiotic use in early life is more common among asthmatic children.
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Affiliation(s)
- J C Celedón
- Channing Laboratory, Brigham and Women's Hospital, Boston, MA, USA.
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20
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Celedón JC, Soto-Quiros ME, Palmer LJ, Senter J, Mosley J, Silverman EK, Weiss ST. Lack of association between a polymorphism in the interleukin-13 gene and total serum immunoglobulin E level among nuclear families in Costa Rica. Clin Exp Allergy 2002; 32:387-90. [PMID: 11940068 DOI: 10.1046/j.1365-2222.2002.01348.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND IL-13 has been implicated in the pathogenesis of asthma and in the regulation of IgE synthesis in humans. Single nucleotide polymorphisms (SNPs) in the IL-13 gene have been associated with asthma and total serum IgE level in Caucasian populations. OBJECTIVE To test for genetic association between an SNP in exon 4 of the IL-13 gene (IL-13 + 2044 or Arg130Gln) and total serum IgE level and asthma-related phenotypes in a population with high prevalence of asthma living in Costa Rica. METHODS Family-based association study. RESULTS Among 83 Costa Rican school children with asthma and their parents (249 individuals), there was no evidence of linkage disequilibrium between the IL-13 + 2044 SNP and any of the outcomes of interest (total serum IgE level on a logarithmic scale, number of positive skin tests to aeroallergens, and asthma). These results were not significantly changed after adjustment for age and gender. CONCLUSIONS No significant evidence of linkage disequilibrium between an SNP in exon 4 of the IL-13 gene and total serum IgE level, sensitization to allergens or asthma was found in a family-based association study in Costa Rica.
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Affiliation(s)
- J C Celedón
- Channing Laboratory Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
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Celedón JC, Palmer LJ, Litonjua AA, Weiss ST, Wang B, Fang Z, Xu X. Body mass index and asthma in adults in families of subjects with asthma in Anqing, China. Am J Respir Crit Care Med 2001; 164:1835-40. [PMID: 11734432 DOI: 10.1164/ajrccm.164.10.2105033] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We conducted a cross-sectional study of 7,109 adults from families of subjects with asthma in the province of Anhui, China. Asthma was defined either as a combination of physician-diagnosed asthma, airway responsiveness to methacholine at < or = 25 mg/ml and two or more respiratory symptoms or asthma attacks ("asthma"); or as a combination of airway responsiveness to methacholine at < or = 8 mg/ml and two or more respiratory symptoms or asthma attacks ("symptomatic airway hyperresponsiveness [AHR]"). After adjusting for intensity of cigarette smoking and other variables, both extremes of the body mass index (BMI) distribution were associated with symptomatic AHR in men and women (p < 0.01). In the multivariate analysis, both under- and overweight were associated with asthma in women, and underweight was associated with asthma in men. Among men, those with BMIs of 16 and 30 kg/m(2) had 2.5 and 2.3 times higher odds of symptomatic AHR, respectively, than those whose BMI was 21 kg/m(2) (95% CI for OR(16 vs. 21 kg/m)(2) = 1.4 to 3.8; 95% CI for OR(30) (vs.) (21) (kg/m)(2) = 1.2 to 5.0). Among women, those with BMIs of 16 and 30 kg/m(2) had 2.0 and 2.3 times higher odds of symptomatic AHR than those whose BMI was 21 kg/m(2) (95% CI for OR(16) (vs.) (21) (kg/m)(2) = 1.3 to 3.1; 95% CI(30) (vs.) (21) (kg/m)(2) = 1.2 to 4.5). Among adults in families of subjects with asthma living in rural China, both underweight and overweight are associated with an increased risk of asthma.
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Affiliation(s)
- J C Celedón
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
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Abstract
BACKGROUND Little is known about factors determining the pathogenesis and severity of asthma in Latin American countries. Costa Rica, one of the most prosperous Latin American nations, has a very high asthma prevalence. OBJECTIVE To examine the relation between potential risk factors and childhood asthma in Costa Rica. METHODS Cross-sectional study of 214 schoolchildren aged 10 to 13 years participating in phase II of the International Study of Asthma and Allergies in Childhood. RESULTS After adjustment for age, gender, area of residence, maternal smoking during pregnancy, and airway responsiveness to hypertonic saline solution, sensitization to house dust mites was associated with asthma (odds ratio [OR], 2.2; 95% confidence interval [CI], 1.1 to 4.4; p = 0.02). In the multivariate analysis, parental education no higher than high school (OR, 3.0; 95% CI, 1.4 to 6.4; p < 0.01) and parental history of asthma (OR, 2.6; 95% CI, 1.3 to 5.2; p < 0.01) were also independent predictors of childhood asthma. CONCLUSIONS Sensitization to house dust mites, low parental education, and parental history of asthma are associated with asthma in Costa Rica.
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Affiliation(s)
- J C Celedón
- Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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Abstract
OBJECTIVE Sensitization to perennial aeroallergens is associated with asthma in industrialized countries with a Western lifestyle. Because silk products are commonly used in Chinese society, we were interested in examining the relation between sensitization to silk and asthma. DESIGN Cross-sectional study of 871 children in 503 families living in Anqing, a predominantly rural province of China. RESULTS After adjustment for age, gender, familial correlations, and sensitization to other aeroallergens, skin test reactivity to silk was an independent predictor of asthma (odds ratio = 2.6; 95% confidence interval = 1.2-5.7). This association became stronger after inclusion of the eosinophil count and history of parasitic diseases of the participants in the multivariate model (odds ratio = 3.6; 95% confidence interval = 1.4-8.9). CONCLUSION Because sericulture is an important activity in China and other countries throughout the world, sensitization to silk may influence the pathogenesis and severity of asthma in people living in these nations.
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Affiliation(s)
- J C Celedón
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
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Celedón JC, Palmer LJ, Weiss ST, Wang B, Fang Z, Xu X. Asthma, rhinitis, and skin test reactivity to aeroallergens in families of asthmatic subjects in Anqing, China. Am J Respir Crit Care Med 2001; 163:1108-12. [PMID: 11316644 DOI: 10.1164/ajrccm.163.5.2005086] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In industrialized countries with a Western lifestyle, sensitization to perennial aeroallergens is strongly associated with asthma, whereas sensitization to seasonal aeroallergens is closely related to allergic rhinitis. Little is known, however, about the relation between skin test reactivity to aeroallergens and either asthma or rhinitis in mainland China. We studied 10,009 members of 2,544 families in Anqing (China) that were selected on the basis of physician-diagnosed asthma in at least two siblings. Generalized estimating equations were employed to study the association between skin test reactivity to aeroallergens and either asthma or rhinitis. After adjustment for age, sex, intensity of smoking, skin test reactivity to other aeroallergens, and household correlations, sensitization to dust mite was an independent predictor of both asthma (OR = 1.3, 95% CI = 1.1 to 1.5, p = 0.008) and rhinitis (OR = 1.3, 95% CI = 1.0 to 1.8, p = 0.04). Sensitization to mold was significantly associated with asthma (OR = 1.6, 95% CI = 1.1 to 2.3, p = 0.008), and sensitization to silk was an independent predictor of rhinitis (OR = 1.5, 95% CI = 1.1 to 2.2, p = 0.02). Although 46.9% of the study participants were sensitized to at least one allergen, only 3.5% of study subjects reported nasal symptoms consistent with rhinitis. Among asthmatic subjects, 6.2% reported nasal symptoms. Whereas sensitization to perennial aeroallergens was associated with asthma among families of asthmatic subjects in rural China, sensitization to silk was the strongest predictor of rhinitis in this population. Our findings also suggest that allergic rhinitis is far less common among asthmatic subjects in rural China than in asthmatic subjects in industrialized countries with a Western lifestyle.
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Affiliation(s)
- J C Celedón
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
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