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Respiratory Research
Published in: Respiratory Research 1/2009

Open Access 01-12-2009 | Research

Level and course of FEV1 in relation to polymorphisms in NFE2L2 and KEAP1 in the general population

Authors: Mateusz Siedlinski, Dirkje S Postma, Jolanda MA Boer, Gerrit van der Steege, Jan P Schouten, Henriette A Smit, H Marike Boezen

Published in: Respiratory Research | Issue 1/2009

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Abstract

Background

The metabolism of xenobiotics plays an essential role in smoking related lung function loss and development of Chronic Obstructive Pulmonary Disease. Nuclear Factor Erythroid 2-Like 2 (NFE2L2 or NRF2) and its cytosolic repressor Kelch-like ECH-associated protein-1 (KEAP1) regulate transcription of enzymes involved in cellular detoxification processes and Nfe2l2-deficient mice develop tobacco-induced emphysema. We assessed the impact of Single Nucleotide Polymorphisms (SNPs) in both genes on the level and longitudinal course of Forced Expiratory Volume in 1 second (FEV1) in the general population.

Methods

Five NFE2L2 and three KEAP1 tagging SNPs were genotyped in the population-based Doetinchem cohort (n = 1,152) and the independent Vlagtwedde-Vlaardingen cohort (n = 1,390). On average 3 FEV1 measurements during 3 surveys, respectively 7 FEV1 measurements during 8 surveys were present. Linear Mixed Effect models were used to test cross-sectional and longitudinal genetic effects on repeated FEV1 measurements.

Results

In the Vlagtwedde-Vlaardingen cohort SNP rs11085735 in KEAP1 was associated with a higher FEV1 level (p = 0.02 for an additive effect), and SNP rs2364723 in NFE2L2 was associated with a lower FEV1 level (p = 0.06). The associations were even more significant in the pooled cohort analysis. No significant association of KEAP1 or NFE2L2 SNPs with FEV1 decline was observed.

Conclusion

This is the first genetic study on variations in key antioxidant transcriptional regulators KEAP1 and NFE2L2 and lung function in a general population. It identified 2 SNPs in NFE2L2 and KEAP1 which affect the level of FEV1 in the general population. It additionally shows that NFE2L2 and KEAP1 variations are unlikely to play a role in the longitudinal course of FEV1 in the general population.
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Metadata
Title
Level and course of FEV1 in relation to polymorphisms in NFE2L2 and KEAP1 in the general population
Authors
Mateusz Siedlinski
Dirkje S Postma
Jolanda MA Boer
Gerrit van der Steege
Jan P Schouten
Henriette A Smit
H Marike Boezen
Publication date
01-12-2009
Publisher
BioMed Central
Published in
Respiratory Research / Issue 1/2009
Electronic ISSN: 1465-993X
DOI
https://doi.org/10.1186/1465-9921-10-73

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