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Gene-environment interaction effects on lung function- a genome-wide association study within the Framingham heart
Shu-Yi Liao, Xihong Lin, David C Christiani1
1Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA. dchris@hsph.harvard.edu.
This study reveals that specific gene variants, like rs9931086 in SLC38A8, interact with occupational exposures to influence lung function (FEV1). These findings highlight the importance of gene-environment interactions in respiratory health.
Area of Science:
- Environmental Health
- Genetics
- Pulmonary Medicine
Background:
- Previous research on occupational exposure and lung function overlooked gene-environment interactions.
- Interactions with environmental factors may reveal disease-susceptible genes with low marginal effects.
- Genome-wide interaction studies are crucial for identifying these susceptibility genes.
Purpose of the Study:
- To investigate gene by occupational exposure interactions affecting lung function.
- To utilize both single nucleotide polymorphism (SNP) and genetic network approaches.
Main Methods:
- Analysis of the Framingham Heart Study Offspring and Third Generation cohorts.
- Lung function outcomes included forced expiratory volume in one second (FEV1) and FEV1/forced vital capacity (FVC).
- Genome-wide gene-environment interaction analysis using Affymetrix 550 K genotyping and generalized estimating equations for familial relatedness.
Main Results:
- A total of 4,785 participants were analyzed.
- SNP rs9931086 in the SLC38A8 gene significantly modified occupational exposure effects on FEV1 (P(interaction) = 1.16 × 10(-7)).
- Network analysis implicated CTLA-4, HDAC, and PPAR-alpha genes.
Conclusions:
- SNP rs9931086 in SLC38A8 may alter occupational exposure impacts on lung function.
- Genes CTLA-4, HDAC, and PPAR-alpha, involved in inflammation, might also modify these effects.
- Gene-environment interactions are critical for understanding occupational impacts on respiratory health.
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