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Type: Journal article
Title: Association analysis of 29,956 individuals confirms that a low- frequency variant at CCND2 halves the risk of type 2 diabetes by enhancing insulin secretion
Author: Yaghootkar, H.
Stancáková, A.
Freathy, R.
Vangipurapu, J.
Weedon, M.
Xie, W.
Wood, A.
Ferrannini, E.
Mari, A.
Ring, S.
Lawlor, D.
Smith, G.
Jørgensen, T.
Hansen, T.
Pedersen, O.
Steinthorsdottir, V.
Guobjartsson, D.
Thorleifsson, G.
Thorsteinsdottir, U.
Stefansson, K.
et al.
Citation: Diabetes, 2015; 64(6):2279-2285
Publisher: American Diabetes Association
Issue Date: 2015
ISSN: 0012-1797
1939-327X
Statement of
Responsibility: 
Hanieh Yaghootkar ... Debbie A. Lawlor ... et al.
Abstract: A recent study identified a low-frequency variant at CCND2 associated with lower risk of type 2 diabetes, enhanced insulin response to a glucose challenge, higher height, and, paradoxically, higher BMI. We aimed to replicate the strength and effect size of these associations in independent samples and to assess the underlying mechanism. We genotyped the variant in 29,956 individuals and tested its association with type 2 diabetes and related traits. The low-frequency allele was associated with a lower risk of type 2 diabetes (OR 0.53; P = 2 3 10213; 6,647 case vs. 12,645 control subjects), higher disposition index (b = 0.07 log10; P = 2 3 10211; n = 13,028), and higher Matsuda index of insulin sensitivity (b = 0.02 log10; P = 5 3 1023; n = 13,118) but not fasting proinsulin (b = 0.01 log10; P = 0.5; n = 6,985). The low frequency allele was associated with higher adult height (b = 1.38 cm; P = 6 3 1029; n = 13,927), but the association of the variant with BMI (b = 0.36 kg/m2; P = 0.02; n = 24,807), estimated in four population-based samples, was less than in the original publication where the effect estimate was biased by analyzing case subjects with type 2 diabetes and control subjects without diabetes separately. Our study establishes that a low-frequency allele in CCND2 halves the risk of type 2 diabetes primarily through enhanced insulin secretion.
Keywords: Humans; Diabetes Mellitus, Type 2; Insulin; Body Mass Index; Gene Frequency; Genotype; Alleles; Cyclin D2
Rights: © 2015 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered.
RMID: 0030041744
DOI: 10.2337/db14-1456
Appears in Collections:Medicine publications

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