A genome-wide association meta-analysis identifies new childhood obesity loci
Date
2012
Authors
Bradfield, J.
Taal, H.
Timpson, N.
Scherag, A.
Lecoeur, C.
Warrington, N.
Hypponen, E.
Holst, C.
Valcarcel, B.
Thiering, E.
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Journal article
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Nature Genetics, 2012; 44(5):526-531
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Jonathan P Bradfield ... Lyle J Palmer ... et al. for the Early Growth Genetics (EGG) Consortium
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Abstract
Multiple genetic variants have been associated with adult obesity and a few with severe obesity in childhood; however, less progress has been made in establishing genetic influences on common early-onset obesity. We performed a North American, Australian and European collaborative meta-analysis of 14 studies consisting of 5,530 cases (≥95th percentile of body mass index (BMI)) and 8,318 controls (<50th percentile of BMI) of European ancestry. Taking forward the eight newly discovered signals yielding association with P < 5 × 10−6 in nine independent data sets (2,818 cases and 4,083 controls), we observed two loci that yielded genome-wide significant combined P values near OLFM4 at 13q14 (rs9568856; P = 1.82 × 10−9; odds ratio (OR) = 1.22) and within HOXB5 at 17q21 (rs9299; P = 3.54 × 10−9; OR = 1.14). Both loci continued to show association when two extreme childhood obesity cohorts were included (2,214 cases and 2,674 controls). These two loci also yielded directionally consistent associations in a previous meta-analysis of adult BMI.
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© 2012 Nature America, Inc. All rights reserved.