Methylome-wide association study of early life stressors and adult mental health.

TitleMethylome-wide association study of early life stressors and adult mental health.
Publication TypeJournal Article
Year of Publication2021
AuthorsHoward DM, Pain O, Arathimos R, Barbu MC, Amador C, Walker RM, Jermy B, Adams MJ, Deary IJ, Porteous D, Campbell A, Sullivan PF, Evans KL, Arseneault L, Wray NR, Meaney MJ, McIntosh AM, Lewis CM
JournalHum Mol Genet
Date Published2021 Sep 15
ISSN1460-2083
Abstract

The environment and events that we are exposed to in utero, during birth and in early childhood influence our future physical and mental health. The underlying mechanisms that lead to these outcomes are unclear, but long-term changes in epigenetic marks, such as DNA methylation, could act as a mediating factor or biomarker. DNA methylation data was assayed at 713522 CpG sites from 9537 participants of the Generation Scotland: Scottish Family Health Study, a family-based cohort with extensive genetic, medical, family history and lifestyle information. Methylome-wide association studies of eight early life environment phenotypes and two adult mental health phenotypes (major depressive disorder and brief resilience scale) were conducted using DNA methylation data collected from adult whole blood samples. Two genes involved with different developmental pathways (PRICKLE2 and ABI1) were annotated to CpG sites associated with preterm birth (P < 1.27 × 10-9). A further two genes important to the development of sensory pathways (SOBP and RPGRIP1) were annotated to sites associated with low birth weight (P < 4.35 × 10-8). The examination of methylation profile scores and genes and gene-sets annotated from associated CpGs sites found no evidence of overlap between the early life environment and mental health conditions. Birth date was associated with a significant difference in estimated lymphocyte and neutrophil counts. Previous studies have shown that early life environments influence the risk of developing mental health disorders later in life; however, this study found no evidence that this is mediated by stable changes to the methylome detectable in peripheral blood.

DOI10.1093/hmg/ddab274
Alternate JournalHum Mol Genet
PubMed ID34523677
Grant List216767/Z/19/Z / WT_ / Wellcome Trust / United Kingdom
1087889 / / NHMRC /
MR/K026992/1 / BB_ / Biotechnology and Biological Sciences Research Council / United Kingdom
MC_PC_U127592696 / MRC_ / Medical Research Council / United Kingdom
MC_PC_U127561128 / MRC_ / Medical Research Council / United Kingdom