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The Development of Age Estimation Model for Unidentified Individuals Based on Mitochondrial DNA Methylation Changes

Research Project

Project/Area Number 22KJ0206
Project/Area Number (Other) 21J23562 (2021-2022)
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeMulti-year Fund (2023)
Single-year Grants (2021-2022)
Section国内
Review Section Basic Section 58040:Forensics medicine-related
Research InstitutionTohoku University

Principal Investigator

GUAN XUETING  東北大学, 医学系研究科, 特別研究員(DC1)

Project Period (FY) 2023-03-08 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2023: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
KeywordsAge estimation / Forensic epigenetics / DNA methylation / Mitochondrial analysis / Mitochondrial genome / Post-mortem samples / Mitochondrial epigenome
Outline of Research at the Start

This study focuses on developing an objective and feasible age estimation model for Japanese individuals. Using post-mortem bones and blood samples that were collected from adults, the most-correlated candidate CpG sites that shared in both types of samples were screened and will be evaluated with an independent dataset.

Outline of Annual Research Achievements

During this year, the main goal of this project was to identify the significant age-related CpG sites at the whole genome scale for both bone and whole samples. A total number of 16 donors, aged from 22 to 78 years, were analyzed by Illumina EPIC microarray, and nine CpG probes showed a significant correlation with aging in both types of samples. Among these CpG probes, the best-correlated CpG probe in 16 whole blood samples was cg18826637 with a Pearson's correlation(R) of -0.942 (R: 0.844, P-value: 5.26e-08), and the best-correlated CpG probe was cg10543947 in 16 bone samples (P-value: 3.97e-05).To reduce the cost of Microarray, a novel method called methylation-sensitive(MS) SNaPShot assay was also applied to identify the consistency of measuring DNA methylation levels using different methods. This suggests that SNaPShot assay can be an alternative method in forensic research. Due to the limited availability of bone samples, 16 whole blood samples from the EPIC Microarray were initially analyzed by MS-SNaPShot assay at the cg18826637, showing a high correlation between two methods (R: 0.958, P-value:5.24e-09). With another 16 donors(20-76 years of age), cg18826637 showed a strong correlation with aging(R: -0.912, P-value: 8.47e-07). The manuscript based on mitochondrial DNA methylation and aging was submitted to the journal Forensic Science International: Reports and is currently under review. The manuscript based on genomic age-related CpG probes is preparing and expected to submit to the journal Forensic Science International: Genetics by June, 2024.

Report

(3 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (10 results)

All 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] 薬物性糖尿病が原因と疑われた総合失調症の青年の解剖例2022

    • Author(s)
      X.Guan, A.Usui, T.Ogawara, T.Ohuchi, K.Usui and M.Funayama
    • Journal Title

      法医学の実際と研究

      Volume: 65 Pages: 167-170

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ベッドから落ち、さかさまの状態で死亡した乳児解剖例2022

    • Author(s)
      A.Usui, X.Guan, T.Ohuchi, H.Odagiri, T. Ogawara and M.Funamaya
    • Journal Title

      法医学の実際と研究

      Volume: 65 Pages: 171-174

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 死後の真菌増殖によるhalo signー死後コンピューター断層撮影所見2022

    • Author(s)
      A.Usui, X.Guan, T.Ohuchi, H.Odagiri, T.Ogawara and M.Funayama
    • Journal Title

      法医学の実際と研究

      Volume: 65 Pages: 175-178

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Allele frequencies of 31 autosomal short tandem repeat (auSTR) loci obtained using the Precision ID GlobalFiler NGS STR Panel v2 in 322 individuals from the Japanese population2022

    • Author(s)
      Tsukasa Ohuchi, Xueting Guan, Eriko Hirai, Masaki Hashiyada, Sho Manabe, Atsushi Akane, Noboru Adachi, Keiji Tamaki, Masato Funayama
    • Journal Title

      Legal Medicine

      Volume: 59 Pages: 102151-102151

    • DOI

      10.1016/j.legalmed.2022.102151

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 3.Age-related DNA methylation analysis for forensic age estimation using post-mortem blood samples from Japanese individuals.2021

    • Author(s)
      X.Guan, T.Ohuchi, M.Hashiyada, M.Funayama.
    • Journal Title

      Legal Medicine

      Volume: 53 Pages: 101917-101917

    • DOI

      10.1016/j.legalmed.2021.101917

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of Autopsy Cases of Unknown Cause of Death in Psychotropic Drug Users2021

    • Author(s)
      X.Guan, T.Ohuchi, K. Usui, Y. Igari, T. Ogawara, M. Hashiyada, A. Usui and M. Funayama
    • Journal Title

      The Research and Practice in Forensic Medicine

      Volume: 64 Pages: 159-165

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] The Report on Age-related Differential DNA Methylation Areas in Human Bones and Blood Samples2023

    • Author(s)
      GUAN XUETING
    • Organizer
      第107次日本法医学会学術全国集会
    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
  • [Presentation] Report on Age Estimation Based on Mitochondrial DNA Methylation Levels Using Human Blood Samples2022

    • Author(s)
      GUAN XUETING
    • Organizer
      第31回日本DNA多形学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Report on Age Estimation Based on Mitochondrial DNA Methylation Level Using Unidentified Human Ribs2022

    • Author(s)
      GUAN XUETING
    • Organizer
      第106次日本法医学会学術全国集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 向精神薬服用者の死因不明剖検例の検討2021

    • Author(s)
      GUAN XUETING
    • Organizer
      第105次日本法医学会学術全国集会
    • Related Report
      2021 Annual Research Report

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Published: 2021-05-27   Modified: 2024-12-25  

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