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Jafar-Mohammadi, B.* ; Groves, C.J.* ; Gjesing, A.P.* ; Herrera, BM.* ; Winckler, W.* ; Stringham, H.M.* ; Morris, A.P.* ; Lauritzen, T.* ; Doney, A.S.* ; Morris, A.D.* ; Weedon, M.N.* ; Swift, AJ.* ; Kuusisto, J.* ; Laakso, M.* ; Altshuler, D.* ; Hattersley, A.T.* ; Collins, F.S.* ; Boehnke, M.* ; Hansen, T.* ; Pedersen, O.* ; Palmer, C.N.* ; Frayling, T.M.* ; DIAGRAM Consortium (Huth, C. ; Grallert, H. ; Gieger, C. ; Klopp, N. ; Meitinger, T. ; Petersen, A.-K. ; Thorand, B. ; Wichmann, H.-E. ; Illig, T.) ; Gloyn, AL.* ; McCarthy, M.I.*

A role for coding functional variants in HNF4A in type 2 diabetes susceptibility.

Diabetologia 54, 111-119 (2011)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Rare mutations in the gene HNF4A, encoding the transcription factor hepatocyte nuclear factor 4α (HNF-4A), account for ~5% of cases of MODY and more frequent variants in this gene may be involved in multifactorial forms of diabetes. Two low-frequency, non-synonymous variants in HNF4A (V255M, minor allele frequency [MAF] ~0.1%; T130I, MAF ~3.0%)-known to influence downstream HNF-4A target gene expression-are of interest, but previous type 2 diabetes association reports were inconclusive. We aimed to evaluate the contribution of these variants to type 2 diabetes susceptibility through large-scale association analysis. METHODS: We genotyped both variants in at least 5,745 cases and 14,756 population controls from the UK and Denmark. We also undertook an expanded association analysis that included previously reported and novel genotype data obtained in Danish, Finnish, Canadian and Swedish samples. A meta-analysis incorporating all published association studies of the T130I variant was subsequently carried out in a maximum sample size of 14,279 cases and 26,835 controls. RESULTS: We found no association between V255M and type 2 diabetes in either the initial (p = 0.28) or the expanded analysis (p = 0.44). However, T130I demonstrated a modest association with type 2 diabetes in the UK and Danish samples (additive per allele OR 1.17 [95% CI 1.08-1.28]; p = 1.5 × 10⁻⁴), which was strengthened in the meta-analysis (OR 1.20 [95% CI 1.10-1.30]; p = 2.1 × 10⁻⁵). CONCLUSIONS/INTERPRETATION: Our data are consistent with T130I as a low-frequency variant influencing type 2 diabetes risk, but are not conclusive when judged against stringent standards for genome-wide significance. This study exemplifies the difficulties encountered in association testing of low-frequency variants.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords HNF4A; Low-frequency variants; T130I; Type 2 diabetes; V255M
ISSN (print) / ISBN 0012-186X
e-ISSN 1432-0428
Journal Diabetologia
Quellenangaben Volume: 54, Issue: 1, Pages: 111-119 Article Number: , Supplement: ,
Publisher Springer
Publishing Place Berlin ; Heidelberg [u.a.]
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Genetic Epidemiology (IGE)
Research Unit Molecular Epidemiology (AME)