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Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EAA)

ABSTRACT: Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EAA)

PROVIDER: PRJNA930721 | ENA |

REPOSITORIES: ENA

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Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EAA)

Project description:Prenatal maternal stress has a negative impact on child health but the mechanisms through which maternal stress affects child health are unclear. Epigenetic variation, such as DNA methylation, is a likely mechanistic candidate as DNA methylation is sensitive to environmental insults and can regulate long-term changes in gene expression. We recruited mother-newborn dyads in the Democratic Republic of Congo to investigate the effects of maternal stress on DNA methylation in mothers and newborns. We used four measures of maternal stress to capture a range of stressful experiences: general trauma, sexual trauma, war trauma, and chronic stress. We identified differentially methylated positions (DMPs) associated with general trauma, sexual trauma, and war trauma in both mothers and newborns. No DMPs were associated with chronic stress. Sexual trauma was positively associated with epigenetic age acceleration across several epigenetic clocks in mothers. General trauma and war trauma were positively associated with newborn epigenetic age acceleration using the extrinsic epigenetic age clock. We tested the top DMPs for enrichment of DNase I hypersensitive sites (DHS) and found no enrichment in mothers. In newborns, top DMPs associated with war trauma were enriched for DHS in embryonic and fetal cell types. Finally, one of the top DMPs associated with war trauma in newborns also predicted birthweight, completing the cycle from maternal stress to DNA methylation to newborn health outcome. Our results indicate that maternal stress is associated with site-specific changes in DNAm and epigenetic age acceleration in both mothers and newborns.

2023-06-08 | GSE224363 | GEO

Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo

Project description:Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo

| PRJNA930720 | ENA

Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EWA reanalysis)

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Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EWA reanalysis)

Project description:Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo (EWA reanalysis)

| PRJNA930722 | ENA

Epigenetic analysis of psychosocial stress among mother-newborn dyads in the Democratic Republic of Congo

Project description:This SuperSeries is composed of the SubSeries listed below.

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Expression data from mothers, placentas, and newborns in the Democratic Republic of Congo

Project description:Maternal stress has long been associated with lower birthweight but mechanisms remain elusive. This study explored how maternal stress may impact changes in gene expression within a cohort of mother-placenta-newborn triads in the eastern Democratic Republic of Congo We used microarrays to detail the global programme of gene expression underlying the impact of maternal stress on newborn birthweight and identified that global placental gene expression may partially mediate the negative impact of maternal war stress on newborn birthweight.

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