Summary
This study presents a comprehensive catalogue of genetic influences on DNA methylation across five distinct life stages—from birth through middle age—using blood samples from children and their mothers. The authors demonstrate that genetic effects on methylation are remarkably stable throughout the lifespan, with developmental changes primarily driven by increases in environmental and stochastic effects rather than genetic variation. The work suggests that DNA methylation contains a significant heritable component with potential causal roles in complex disease traits, providing a valuable resource for investigating epigenetic mechanisms in disease aetiology.
UK applicability
As a UK-based cohort study (likely using Avon Longitudinal Study of Parents and Children data based on author affiliations), the findings are directly applicable to understanding epigenetic inheritance and disease risk in UK populations. The mQTL database may inform future UK biobank studies and clinical investigations into the epigenetic basis of complex diseases.
Key measures
Methylation quantitative trait loci (mQTL) identified at five life stages; proportion of cis-acting versus trans-acting genetic effects; contribution of mQTL to complex trait variation
Outcomes reported
The study catalogued genetic influences on DNA methylation (mQTL) across five life stages in human blood samples from birth through middle age, and estimated the contribution of methylation to variation in complex traits. It identified the proportion of cis-acting versus trans-acting genetic effects on methylation and their stability across the lifespan.
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