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IL6 Gene Promoter Polymorphisms and Type 2 Diabetes
Author(s) -
Cornelia Huth,
Iris M. Heid,
Caren Vollmert,
Christian Gieger,
Harald Grallert,
Johanna K. Wolford,
Birgit Langer,
Barbara Thorand,
Norman Klopp,
Yasmin H. Hamid,
Oluf Pedersen,
Torben Hansen,
Valeriya Lyssenko,
Leif Groop,
Christa Meisinger,
Angela Döring,
Hannelore Löwel,
Wolfgang Lieb,
Christian Hengstenberg,
Wolfgang Rathmann,
Stéphan Martin,
Jeffrey W. Stephens,
Helen Ireland,
Hugh M Mather,
George J. Miller,
Heather M. Stringham,
Michael Boehnke,
Jaakko Tuomilehto,
Heiner Boeing,
Matthias Möhlig,
Joachim Spranger,
A. Pfeiffer,
Ingrid Wernstedt Asterholm,
Anders Niklason,
Abel LópezBermejo,
José Manuel FernándezReal,
Robert L. Hanson,
Luis Gallart,
Joan Vendrell,
Anastasia Tsiavou,
Erifili Hatziagelaki,
Steve E. Humphries,
H.Erich Wichmann,
Christian Herder,
Thomas Illig
Publication year - 2006
Publication title -
diabetes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.219
H-Index - 330
eISSN - 1939-327X
pISSN - 0012-1797
DOI - 10.2337/db06-0600
Subject(s) - type 2 diabetes , odds ratio , diabetes mellitus , allele , genotype , medicine , tcf7l2 , interleukin 6 , type 1 diabetes , gene , endocrinology , single nucleotide polymorphism , genetics , biology , cytokine
Several lines of evidence indicate a causal role of the cytokine interleukin (IL)-6 in the development of type 2 diabetes in humans. Two common polymorphisms in the promoter of the IL-6 encoding gene IL6, -174G>C (rs1800795) and -573G>C (rs1800796), have been investigated for association with type 2 diabetes in numerous studies but with results that have been largely equivocal. To clarify the relationship between the two IL6 variants and type 2 diabetes, we analyzed individual data on >20,000 participants from 21 published and unpublished studies. Collected data represent eight different countries, making this the largest association analysis for type 2 diabetes reported to date. The GC and CC genotypes of IL6 -174G>C were associated with a decreased risk of type 2 diabetes (odds ratio 0.91, P = 0.037), corresponding to a risk modification of nearly 9%. No evidence for association was found between IL6 -573G>C and type 2 diabetes. The observed association of the IL6 -174 C-allele with a reduced risk of type 2 diabetes provides further evidence for the hypothesis that immune mediators are causally related to type 2 diabetes; however, because the association is borderline significant, additional data are still needed to confirm this finding.

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