Ahluwalia, TS;
Prins, BP;
Abdollahi, M;
Armstrong, NJ;
Aslibekyan, S;
Bain, L;
Jefferis, B;
... Alizadeh, BZ; + view all
(2021)
Genome-Wide Association Study of Circulating Interleukin 6 Levels Identifies Novel Loci.
Human Molecular Genetics
, 30
(5)
pp. 393-409.
10.1093/hmg/ddab023.
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Abstract
Interleukin-6 (IL-6) is a multifunctional cytokine with both pro- and anti-inflammatory properties with a heritability estimate of up to 61%. The circulating levels of IL-6 in blood have been associated with an increased risk of complex disease pathogenesis. We conducted a two-staged, discovery, and replication meta genome-wide association study (GWAS) of circulating serum IL-6 levels comprising up to 67 428 (n{discovery} = 52 654 and n_{replication} = 14 774) individuals of European ancestry. The inverse variance fixed-effects based discovery meta-analysis, followed by replication led to the identification of two independent loci, IL1F10/IL1RN rs6734238 on Chromosome (Chr) 2q14, (pcombined = 1.8 × 10^{−11}), HLA-DRB1/DRB5 rs660895 on Chr6p21 (p_{combined} = 1.5 × 10^{−10}) in the combined meta-analyses of all samples. We also replicated the IL6R rs4537545 locus on Chr1q21 (p_{combined} = 1.2 × 10^{−122}). Our study identifies novel loci for circulating IL-6 levels uncovering new immunological and inflammatory pathways that may influence IL-6 pathobiology.
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