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Genome-wide interaction study of gene-by-occupational exposures on respiratory symptoms

  • Xiang Zeng
  • , Judith M Vonk
  • , Diana A van der Plaat
  • , Alen Faiz
  • , Peter D Paré
  • , Philippe Joubert
  • , David Nickle
  • , Corry-Anke Brandsma
  • , Hans Kromhout
  • , Roel Vermeulen
  • , Xijin Xu
  • , Xia Huo
  • , Kim de Jong
  • , H Marike Boezen
    • University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, the Netherlands; University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, the Netherlands; Shantou University Medical College, Laboratory of Environmental Medicine and Developmental Toxicology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou, China; Xinxiang Medical University, School of Public Health, Department of Epidemiology and Health Statistics, Xinxiang, China.
    • University Medical Center Groningen
    • University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, the Netherlands; University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, the Netherlands.
    • University of British Columbia, Department of Medicine, Center for Heart Lung Innovation and Institute for Heart and Lung Health, St. Paul's Hospital, Vancouver, BC, Canada.
    • Institut universitaire de cardiologie et de pneumologie de Québec, Laval University, Québec, QC, Canada.
    • Merck & Co Inc, Rahway, NJ, USA.
    • Institute for Risk Assessment Sciences
    • Shantou University Medical College, Laboratory of Environmental Medicine and Developmental Toxicology, Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou, China.
    • Jinan University, School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangzhou, China.
    • University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, the Netherlands; University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, the Netherlands. Electronic address: [email protected].

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Respiratory symptoms are important indicators of respiratory diseases. Both genetic and environmental factors contribute to respiratory symptoms development but less is known about gene-environment interactions. We aimed to assess interactions between single nucleotide polymorphisms (SNPs) and occupational exposures on respiratory symptoms cough, dyspnea and phlegm. As identification cohort LifeLines I (n = 7976 subjects) was used. Job-specific exposure was estimated using the ALOHA + job exposure matrix. SNP-by-occupational exposure interactions on respiratory symptoms were tested using logistic regression adjusted for gender, age, and current smoking. SNP-by-exposure interactions with a p-value <10-4 were tested for replication in two independent cohorts: LifeLines II (n = 5260) and the Vlagtwedde-Vlaardingen cohort (n = 1529). The interaction estimates of the replication cohorts were meta-analyzed using PLINK. Replication was achieved when the meta-analysis p-value was <0.05 and the interaction effect had the same direction as in the identification cohort. Additionally, we assessed whether replicated SNPs associated with gene expression by analyzing if they were cis-acting expression quantitative trait loci (eQTL) in lung tissue. In the replication meta-analysis, sixteen out of 477 identified SNP-by-occupational exposure interactions had a p-value <0.05 and 9 of these interactions had the same direction as in the identification cohort. Several identified loci were plausible candidates for respiratory symptoms, such as TMPRSS9, SERPINH1, TOX3, and ARHGAP18. Three replicated SNPs were cis-eQTLs for FCER1A, CHN1, and TIMM13 in lung tissue. Taken together, this genome-wide SNP-by-occupational exposure interaction study in relation to cough, dyspnea, and phlegm identified several suggestive susceptibility genes. Further research should determine if these genes are true susceptibility loci for respiratory symptoms in relation to occupational exposures.

    Original languageEnglish
    Pages (from-to)263-269
    Number of pages7
    JournalEnvironment international
    Volume122
    DOIs
    Publication statusPublished - Jan 2019

    Keywords

    • Genetics
    • Genome wide
    • Interaction
    • Occupational exposure
    • Respiratory symptoms

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