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Published in: International Journal of Legal Medicine 6/2020

Open Access 01-11-2020 | Post-Traumatic Stress Disorder | Review

Epigenetic clocks may come out of rhythm—implications for the estimation of chronological age in forensic casework

Authors: Barbara Elisabeth Koop, Alexandra Reckert, Julia Becker, Yang Han, Wolfgang Wagner, Stefanie Ritz-Timme

Published in: International Journal of Legal Medicine | Issue 6/2020

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Abstract

There is a growing perception that DNA methylation may be influenced by exogenous and endogenous parameters. Knowledge of these factors is of great relevance for the interpretation of DNA-methylation data for the estimation of chronological age in forensic casework. We performed a literature review to identify parameters, which might be of relevance for the prediction of chronological age based on DNA methylation. The quality of age predictions might particularly be influenced by lifetime adversities (chronic stress, trauma/post-traumatic stress disorder (PTSD), violence, low socioeconomic status/education), cancer, obesity and related diseases, infectious diseases (especially HIV and Cytomegalovirus (CMV) infections), sex, ethnicity and exposure to toxins (alcohol, smoking, air pollution, pesticides). Such factors may alter the DNA methylation pattern and may explain the partly high deviations between epigenetic age and chronological age in single cases (despite of low mean absolute deviations) that can also be observed with “epigenetic clocks” comprising a high number of CpG sites. So far, only few publications dealing with forensic age estimation address these confounding factors. Future research should focus on the identification of further relevant confounding factors and the development of models that are “robust” against the influence of such biological factors by systematic investigations under targeted inclusion of diverse and defined cohorts.
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Metadata
Title
Epigenetic clocks may come out of rhythm—implications for the estimation of chronological age in forensic casework
Authors
Barbara Elisabeth Koop
Alexandra Reckert
Julia Becker
Yang Han
Wolfgang Wagner
Stefanie Ritz-Timme
Publication date
01-11-2020
Publisher
Springer Berlin Heidelberg
Published in
International Journal of Legal Medicine / Issue 6/2020
Print ISSN: 0937-9827
Electronic ISSN: 1437-1596
DOI
https://doi.org/10.1007/s00414-020-02375-0

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