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  • Title: The NFKB1 ATTG ins/del polymorphism and risk of coronary heart disease in three independent populations.
    Author: Vogel U, Jensen MK, Due KM, Rimm EB, Wallin H, Nielsen MR, Pedersen AP, Tjønneland A, Overvad K.
    Journal: Atherosclerosis; 2011 Nov; 219(1):200-4. PubMed ID: 21726863.
    Abstract:
    AIM: Inflammation is a risk factor for coronary heart disease (CHD). A common deletion-allele in the promoter region of NFKB1 results in lower protein levels of the NF-κB p50 subunit. Recent evidence suggests that the NF-κB p50 dimer has anti-inflammatory effects. We aimed to investigate the association of the functional ATTG NFKB1 insertion/deletion variant with risk of CHD in three independent prospective studies of generally healthy men and women. METHODS AND RESULTS: The NFKB1 ins/del polymorphism was genotyped in studies of CHD nested within the Diet, Cancer and Health (DCH) study, the Health Professionals Follow-up (HPFS) and the Nurses' Health (NHS) studies, totaling 1008, 428 and 439 cases, respectively. The minor allele frequency in the combined sample was 0.38 among controls. In a pooled analysis, the relative risk (RR) among heterozygous men and women was 1.22 (95% CI: 1.07-1.40), compared to the most common ins/ins genotype. The RR among homozygotes was 1.20 (95% CI: 0.94-1.53). There was no evidence of an allele-dosage effect, and in a dominant model the RR among del-allele carriers was 1.22 (95% CI: 1.07-1.39). The risk was similar in women and men (RR was 1.20 in women and 1.23 in men, respectively). The NFKB1 variant was not associated with plasma lipid levels, but del-carriers had lower levels of C-reactive protein. CONCLUSIONS: The NFKB1 promoter variant, previously shown to cause partial depletion of NF-κB p50, was associated with a higher risk of CHD in three independent prospective studies of generally healthy Caucasians.
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