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Genetic determinants of circulating interleukin-1 receptor antagonist levels and their association with glycemic traits

Herder, C and Nuotio, ML and Shah, S and Blankenberg, S and Brunner, EJ and Carstensen, M and Gieger, C and Grallert, H and Jula, A and Kähönen, M and Kettunen, J and Kivimäki, M and Koenig, W and Kristiansson, K and Langenberg, C and Lehtimäki, T and Luotola, K and Marzi, C and Müller, C and Peters, A and Prokisch, H and Raitakari, O and Rathmann, W and Roden, M and Salmi, M and Schramm, K and Swerdlow, D and Tabak, AG and Thorand, B and Wareham, N and Wild, PS and Zeller, T and Hingorani, AD and Witte, DR and Kumari, M and Perola, M and Salomaa, V (2014) 'Genetic determinants of circulating interleukin-1 receptor antagonist levels and their association with glycemic traits.' Diabetes, 63 (12). 4343 - 4359. ISSN 0012-1797

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Abstract

© 2014 by the American Diabetes Association. The proinflammatory cytokine interleukin (IL)-1β is implicated in the development of insulin resistance and β-cell dysfunction, whereas higher circulating levels of IL-1 receptor antagonist (IL-1RA), an endogenous inhibitor of IL-1β, has been suggested to improve glycemia and β-cell function in patients with type 2 diabetes. To elucidate the protective role of IL-1RA, this study aimed to identify genetic determinants of circulating IL-1RA concentration and to investigate their associations with immunological and metabolic variables related to cardiometabolic risk. In the analysis of seven discovery and four replication cohort studies, two single nucleotide polymorphisms (SNPs) were independently associated with circulating IL-1RA concentration (rs4251961 at the IL1RN locus [n = 13,955, P = 2.76 3 10221] and rs6759676, closest gene locus IL1F10 [n = 13,994, P = 1.73 × 10 -17 ]). The proportion of the variance in IL-1RA explained by both SNPs combined was 2.0%. IL-1RA-raising alleles of both SNPs were associated with lower circulating C-reactive protein concentration. The IL-1RA-raising allele of rs6759676 was also associated with lower fasting insulin levels and lower HOMA insulin resistance. In conclusion, we show that circulating IL-1RA levels are predicted by two independent SNPs at the IL1RN and IL1F10 loci and that genetically raised IL-1RA may be protective against the development of insulin resistance.

Item Type: Article
Subjects: R Medicine > R Medicine (General)
Divisions: Faculty of Social Sciences > Institute for Social and Economic Research
Depositing User: Clare Chatfield
Date Deposited: 05 Oct 2015 14:03
Last Modified: 17 Aug 2017 17:31
URI: http://repository.essex.ac.uk/id/eprint/15168

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