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Superoxide dismutases, lung function and bronchial responsiveness in a general population.
M Siedlinski1, C C van Diemen, D S Postma
1Department of Epidemiology, University Medical Center Groningen,Groningen, The Netherlands.
The European Respiratory Journal
|February 14, 2009
Summary
Genetic variations in superoxide dismutase genes (SOD2 and SOD3) are linked to chronic obstructive pulmonary disease (COPD) and bronchial hyperresponsiveness. Specific SOD2 gene variants increase COPD and BHR risk, while SOD3 variants affect lung function decline.
Area of Science:
- Genetics
- Pulmonology
- Oxidative Stress Biology
Background:
- Oxidative stress significantly contributes to smoking-related lung diseases, including chronic obstructive pulmonary disease (COPD).
- Superoxide dismutases (SODs) are crucial enzymes that mitigate oxidative stress.
- Genetic variations in SOD genes may influence susceptibility and progression of lung diseases.
Purpose of the Study:
- To investigate the association between single nucleotide polymorphisms (SNPs) in SOD2 and SOD3 genes and COPD, bronchial hyperresponsiveness (BHR), and lung function.
- To identify specific genetic risk factors for COPD and BHR in a large prospective cohort.
Main Methods:
- Genotyping of 1,390 subjects from the Vlagtwedde-Vlaardingen cohort for six SNPs in SOD2 and SOD3.
- Analysis of associations between genotypes and BHR (PC(10)
Main Results:
- The SOD2 C5774T SNP was significantly associated with COPD and BHR in the total population.
- Specific SOD2 genotypes (T/T for C5774T, Val/Val for Ala16Val) were risk factors for BHR in non-COPD individuals.
- SOD3 Arg213Gly substitution correlated with slower FEV(1) decline in never-smokers; SOD3 G(-4466)T SNP was linked to lower vital capacity.
Conclusions:
- SOD2 polymorphisms are associated with BHR, a COPD risk factor, and SOD2 C5774T also confers COPD risk.
- SOD3 polymorphisms show associations with lung function parameters, including FEV(1) decline in never-smokers.
- Genetic variations in SOD genes play a role in the pathogenesis and progression of lung diseases.
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