Variants in ADCY5 and near CCNL1 are associated with fetal growth and birth weight
de Geus, EJC
Genetic Investigation of ANthropometric Traits (GIANT) Consortium
Meta-Analyses of Glucose and Insulin-related traits Consortium
van Duijn, CM
Wellcome Trust Case Control Consortium
Davey Smith, G
Early Growth Genetics (EGG) Consortium
Nature Publishing Group
To identify genetic variants associated with birth weight, we meta-analyzed six genome-wide association (GWA) studies (n = 10,623 Europeans from pregnancy/birth cohorts) and followed up two lead signals in 13 replication studies (n = 27,591). rs900400 near LEKR1 and CCNL1 (P = 2 x 10(-35)) and rs9883204 in ADCY5 (P = 7 x 10(-15)) were robustly associated with birth weight. Correlated SNPs in ADCY5 were recently implicated in regulation of glucose levels and susceptibility to type 2 diabetes, providing evidence that the well-described association between lower birth weight and subsequent type 2 diabetes has a genetic component, distinct from the proposed role of programming by maternal nutrition. Using data from both SNPs, we found that the 9% of Europeans carrying four birth weight-lowering alleles were, on average, 113 g (95% CI 89-137 g) lighter at birth than the 24% with zero or one alleles (P(trend) = 7 x 10(-30)). The impact on birth weight is similar to that of a mother smoking 4-5 cigarettes per day in the third trimester of pregnancy.
This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record.
Vol. 42, pp. 430 - 435
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