It is well established that higher maternal circulating glucose results in bigger and fatter babies. The developmental over nutrition hypothesis extends this relationship and suggests that greater maternal fatness, pregnancy fat gain, gestational diabetes and higher maternal circulating glucose and other fuels such as fatty acids, program offspring to life-long greater fatness and adverse metabolic profiles. However, the mechanisms driving this relationship are still unknown. The overarching aim of the proposed work is to determine the role of metabolomics and epigenomic mechanisms in this relationship. This will be achieved using data from two unique and complementary UK birth cohorts: (i) The Avon Longitudinal Study of Parents and Children (ALSPAC) and Born in Bradford (BiB), each with N~ 13,000 index pregnancies. Both cohorts have/will have detailed and complementary data on maternal developmental over nutrition risk factors in pregnancy, maternal metabolomics assessed by NMR spectroscopy on pregnancy samples, fetal metabolomics assessed using cord blood serum, as well as on serum from several time points during infancy and adolescence. Offspring genome wide methylation patterns have been determined in cord blood white cells and again in childhood and adolescence. Measures of adiposity and metabolic health have been assessed repeatedly from birth to early adulthood. Moreover, ALSPAC offspring are now in their mid-20s and are having children of their own, enabling the investigation of the relationship between maternal risk factors for developmental over nutrition and offspring adiposity and metabolic health across two generations. The work proposed here will identify targets for interventions aimed at reducing the adverse impacts of developmental over nutrition on future generations. Given that 20-50% of women who start pregnancy are overweight or obese and that 15% of pregnancies are affected by GDM, this is extremely important. This work will also develop a framework for the appropriate analyses of large repeatedly assessed multi-'omic' data in birth cohorts.

Public Health Relevance

The increasing prevalence of gestational overweight/obesity and diabetes might drive higher levels of fatness and related adverse outcomes in the general population through intrauterine mechanisms. This project will investigate the role of epigenetic and metabolomics mechanisms in the relationship between maternal fatness, pregnancy weight gain, diabetes, insulin and glucose levels and long term offspring fatness and metabolic health across two generations. Identifying which maternal metabolites are key to any lasting offspring effects, and whether effects are mediated by epigenetic modification, is critical to the development of interventions that target the correct causal mechanism.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
5R01DK103246-04
Application #
9312269
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Silva, Corinne M
Project Start
2014-09-01
Project End
2019-07-31
Budget Start
2017-08-01
Budget End
2018-07-31
Support Year
4
Fiscal Year
2017
Total Cost
Indirect Cost
Name
University of Bristol
Department
Type
DUNS #
225051309
City
Bristol
State
Country
United Kingdom
Zip Code
BS8 1TH
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Beaumont, Robin N; Warrington, Nicole M; Cavadino, Alana et al. (2018) Genome-wide association study of offspring birth weight in 86?577 women identifies five novel loci and highlights maternal genetic effects that are independent of fetal genetics. Hum Mol Genet 27:742-756
Richmond, Rebecca C; Timpson, Nicholas J; Felix, Janine F et al. (2017) Using Genetic Variation to Explore the Causal Effect of Maternal Pregnancy Adiposity on Future Offspring Adiposity: A Mendelian Randomisation Study. PLoS Med 14:e1002221
Sharp, Gemma C; Salas, Lucas A; Monnereau, Claire et al. (2017) Maternal BMI at the start of pregnancy and offspring epigenome-wide DNA methylation: findings from the pregnancy and childhood epigenetics (PACE) consortium. Hum Mol Genet 26:4067-4085
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Sharp, Gemma C; Lawlor, Debbie A; Richmond, Rebecca C et al. (2015) Maternal pre-pregnancy BMI and gestational weight gain, offspring DNA methylation and later offspring adiposity: findings from the Avon Longitudinal Study of Parents and Children. Int J Epidemiol 44:1288-304