Leukocyte methylomic imprints of exposure to the genocide against the Tutsi in Rwanda: a pilot epigenome-wide analysis.

Journal: Epigenomics

Volume: 14

Issue: 1

Year of Publication: 2022

Affiliated Institutions:  Centre for Human Genetics, College of Medicine & Health Sciences, University of Rwanda, Kigali, Rwanda. Genomics Program, College of Public Health, University of South Florida, Tampa, FL, USA. London School of Hygiene & Tropical Medicine, London, UK. Directorate of Research & Innovation, College of Medicine & Health Sciences, University of Rwanda, Kigali, Rwanda. Department of Clinical Psychology, College of Medicine & Health Sciences, University of Rwanda, Huye, Rwanda. Department of Cognitive Neuroscience, Radboud University Medical Center - Donders Institute for Brain, Cognition & Behaviour, Radboud University, Nijmegen, The Netherlands.

Abstract summary 

We conducted a pilot epigenome-wide association study of women from Tutsi ethnicity exposed to the genocide while pregnant and their resulting offspring, and a comparison group of women who were pregnant at the time of the genocide but living outside of Rwanda. Fifty-nine leukocyte-derived DNA samples survived quality control: 33 mothers (20 exposed, 13 unexposed) and 26 offspring (16 exposed, 10 unexposed). Twenty-four significant differentially methylated regions (DMRs) were identified in mothers and 16 in children. genocide exposure was associated with CpGs in three of the 24 DMRs: ,  and , with higher DNA methylation in exposed versus unexposed offspring. Of note, and show significant correlation between brain and blood DNA methylation within individuals, suggesting these peripherally derived signals of genocide exposure may have relevance to the brain.

Authors & Co-authors:  Musanabaganwa Clarisse C Wani Agaz H AH Donglasan Janelle J Fatumo Segun S Jansen Stefan S Mutabaruka Jean J Rutembesa Eugene E Uwineza Annette A Hermans Erno J EJ Roozendaal Benno B Wildman Derek E DE Mutesa Leon L Uddin Monica M

Study Outcome 

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Statistics
Citations :  Lowe SR, Joshi S, Galea S et al. Pathways from assaultive violence to post-traumatic stress, depression, and generalized anxiety symptoms through stressful life events: longitudinal mediation models. Psychol. Med. 47(14), 2556–2566 (2017).
Authors :  13
Identifiers
Doi : 10.2217/epi-2021-0310
SSN : 1750-192X
Study Population
Women,Mothers
Mesh Terms
Child
Other Terms
PTSD;differentially methylated region;epigenetics;epigenomic;genocide;intergenerational transmission;maternal stress;methylation;offspring;trauma
Study Design
Study Approach
Country of Study
Rwanda
Publication Country
England