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Methylation of the LEP gene promoter in blood at 12 months and BMI at 4 years of age—a population-based cohort study

journal contribution
posted on 2020-04-01, 00:00 authored by T Mansell, A L Ponsonby, Fiona Collier, D Burgner, A Pezic, Peter VuillerminPeter Vuillermin, J Ryan, R Saffery, P Vuillermin, J Carlin, K Allen, M Tang, S Ranganathan, T Dwyer, P Sly
Increasing evidence links epigenetic variation to anthropometric and metabolic measures. Leptin signalling regulates appetite and energy expenditure, and in pregnancy is important for nutrient supply to the foetus. Maternal metabolic health and foetal growth are linked to infant blood leptin gene (LEP) methylation, which has been cross-sectionally associated with adolescent obesity. Despite this, few studies have explored the relationship between infant LEP methylation and childhood anthropometry, or the impact of genetic variation on these relationships. Using a prospective birth cohort, we investigated whether blood LEP promoter methylation at birth and 12 months predicts weight and adiposity at 4-years. Locus-specific methylation data was analysed by partial correlation tests and multivariable linear regression. There was weak evidence of an association of birth LEP methylation with anthropometry measures at 4 years. Methylation at a specific site (cg19594666) at 12 months was inversely associated with 4-year weight (r = −0.11, p = 0.02) and body-mass index (BMI) (r = −0.13, p = 0.007), which persisted following adjustment for weight at birth and at 12 months. Neither association was influenced by genotype. We report the first evidence of an association between LEP methylation in infancy and childhood weight. Replication in additional cohorts is required to determine if this relationship persists.

History

Journal

International journal of obesity

Volume

44

Pagination

842 - 847

Publisher

Nature Publishing Group

Location

London, Eng.

ISSN

0307-0565

eISSN

1476-5497

Language

eng

Publication classification

C1 Refereed article in a scholarly journal