Superoxide Dismutase 3 Polymorphism Associated with Reduced Lung Function in Two Large Populations

Morten Dahl, Russell P Bowler, Klaus Juul, James D Crapo, Samuel Levy, Børge G Nordestgaard

    78 Citations (Scopus)

    Abstract

    Rationale: Superoxide dismutase (SOD) 3 inhibits oxidative fragmentation of lung matrix components Collagen 1, hyaluronan, and heparan sulfate. Inherited change in SOD3 expression or function could affect lung matrix homeostasis and influence pulmonary function. Objectives: To identify novel SOD3 polymorphisms that are associated with lung function or chronic obstructive pulmonary disease (COPD). Methods: Resequencing of 182 individuals identified two novel polymorphisms, E1 (rs8192287) and I1 (rs8192288), in a conserved region of the SOD3 gene of potential relationship to lung function. We next genotyped 9,093 individuals from the Copenhagen City Heart Study for the polymorphisms and recorded spirometry, and admissions and deaths due to COPD during 26-year follow-up. Finally, we validated our findings in a cross-sectional analysis of 35,635 individuals from the Copenhagen General Population Study. Measurements and Main Results: Genotyping the Copenhagen City Heart Study identified 35 E1/I1 homozygotes, 1,050 heterozygotes, and 8,008 noncarriers (Hardy-Weinberg equilibrium: P = 0.93). Using quadruple lung function measurements, we found that E1/I1 homozygotes had 7% lower FVC % predicted (P = 0.006) and 4% lower FEV1 % predicted (P = 0.12) compared with noncarriers. In the Copenhagen General Population Study, E1/I1 homozygotes also had lower FVC % predicted than noncarriers (P = 0.03), confirming an association between E1/I1 genotype and reduced lung function. E1/I1 homozygotes had adjusted hazard ratios for COPD hospitalization and COPD mortality of 2.5 (95% confidence interval, 1.0-5.9) and 3.7 (95% confidence interval, 0.9-15), respectively; the results were independent of influence from the R213G allele of the SOD3 gene. Conclusions: We identified two novel polymorphisms in a conserved region of the SOD3 gene and show that individuals that are homozygous for these polymorphisms have reduced FVC % predicted in two large, population-based studies
    Udgivelsesdato: 2008/11/1
    Original languageEnglish
    JournalAmerican Journal of Respiratory and Critical Care Medicine
    Volume178
    Issue number9
    Pages (from-to)906-912
    Number of pages7
    ISSN1073-449X
    DOIs
    Publication statusPublished - 2008

    Keywords

    • Cross-Sectional Studies
    • Denmark
    • Female
    • Follow-Up Studies
    • Genetic Markers
    • Humans
    • Lung
    • Male
    • Middle Aged
    • Oxidative Stress
    • Polymorphism, Genetic
    • Predictive Value of Tests
    • Proportional Hazards Models
    • Prospective Studies
    • Pulmonary Disease, Chronic Obstructive
    • Reproducibility of Results
    • Respiratory Function Tests
    • Spirometry
    • Superoxide Dismutase
    • Vital Capacity

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