Epigenome-Wide Association Study of Wellbeing

Area of Science:

• Behavioral Genetics
• Epigenetics
• Psychiatry

Background:

• Wellbeing is crucial for psychological and mental health, influenced by both genetic and environmental factors.
• Epigenetic mechanisms, like DNA methylation, may mediate these genetic and environmental influences on wellbeing.
• Previous research has not explored epigenome-wide associations with wellbeing.

Purpose of the Study:

• To conduct the first epigenome-wide association study (EWAS) to identify DNA methylation sites associated with wellbeing.
• To investigate the epigenetic basis of individual differences in wellbeing.

Main Methods:

• Utilized data from the Netherlands Twin Register (NTR) biobank project (2002-2011).
• Assessed wellbeing using a satisfaction with life (SAT) inventory.
• Measured DNA methylation in whole blood using the Illumina Infinium HumanMethylation450 BeadChip (HM450k array) on 411,169 autosomal sites.

Main Results:

• Identified two significant DNA methylation sites (cg10845147, cg01940273) associated with wellbeing after Bonferroni correction.
• Found four additional significant sites (cg03329539, cg09716613, cg04387347, cg02290168) using a False Discovery Rate (FDR) q < 0.05 criterion.
• Gene Ontology analysis revealed enrichment in central nervous system categories for top-ranking methylation sites.

Conclusions:

• This study provides the first epigenome-wide insight into the epigenetic mechanisms associated with wellbeing.
• The findings lay the groundwork for future research into the complex biological mechanisms underlying wellbeing.
• Identified specific epigenetic markers that may mediate genetic and environmental influences on wellbeing.