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Published in: International Journal of Legal Medicine 6/2021

01-11-2021 | Epigenetics | Original Article

DNA methylation of decedent blood samples to estimate the chronological age of human remains

Authors: Yessenia Anaya, Patrick Yew, Katherine A. Roberts, W. Reef Hardy

Published in: International Journal of Legal Medicine | Issue 6/2021

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Abstract

Chronological age estimation may offer valuable investigative leads in human identification cases. Bisulfite pyrosequencing analysis of single CpG sites on five genes (KLF14, ELOVL2, C1orf132, TRIM59, and FHL2) was performed on 264 postmortem blood samples from individuals aged 3 months to 93 years. The goals were to develop age prediction models based on the correlation between the methylation profile and chronological age and to assess the accuracy of the prediction. Linear regression between methylation levels and age at each CpG site revealed that the five markers show a statistically significant correlation with age. The methylation data from a training set of 160 postmortem blood samples were used to develop an age prediction model with a correlation coefficient of 0.65, explaining 73.1% of age variation, with a mean absolute deviation from the chronological age of 7.60 years. The accuracy of the model was evaluated with a test set of 72 samples producing a mean absolute deviation of 7.42 years. The training and test sets were also categorized by specific age groups to assess accuracy and deviation from chronological age. The data for both sets revealed a lower prediction potential as an individual increases in age, particularly for the age categories above 50 years.
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Metadata
Title
DNA methylation of decedent blood samples to estimate the chronological age of human remains
Authors
Yessenia Anaya
Patrick Yew
Katherine A. Roberts
W. Reef Hardy
Publication date
01-11-2021
Publisher
Springer Berlin Heidelberg
Keyword
Epigenetics
Published in
International Journal of Legal Medicine / Issue 6/2021
Print ISSN: 0937-9827
Electronic ISSN: 1437-1596
DOI
https://doi.org/10.1007/s00414-021-02650-8

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