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Analysis of persistent DNA damage in the brain as an exacerbating mechanism of traumatic brain injury.

Research Project

Project/Area Number 19H03917
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 58040:Forensics medicine-related
Research InstitutionTokyo Women's Medical University

Principal Investigator

Kibayashi Kazuhiko  東京女子医科大学, 医学部, 教授 (20244113)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywords外傷性脳損傷 / 剖検 / 心停止 / 実験動物 / DNA損傷 / 増悪因子 / モデル動物
Outline of Research at the Start

頭部外傷による外傷性脳損傷は受傷後に増悪し、重症化は予後に影響を及ぼす。外傷性脳損傷が受傷後に増悪する機序を解明するため、ヒト剖検例の解析とモデル動物の解析を行う。1)ヒトの剖検例の後向きの解析研究を行い、頭部外傷による脳損傷の重症度と糖尿病や高血圧などの既往歴との関係を明らかにし、増悪の要因を特定することで外傷性脳損傷の増悪化機序を明らかにする。2)外傷性脳損傷が増悪する糖尿病モデルマウスに脳損傷を作成し、コントロールの非糖尿病マウスと比較することで、脳内DNAが受傷後に持続的に生じていることを証明し、外傷による脳内DNAの持続的損傷が神経機能障害と致死の機序であることを明らかにする。

Outline of Final Research Achievements

The analysis of human autopsy cases revealed that patients with head injuries from traffic accidents need to pay attention to coexisting injuries in the thorax, abdomen, and pelvis, and that it is necessary to take medication on sidewalks and to prevent people with a history of falls from falling. In addition, the study of cases of cardiac arrest immediately after head injury revealed that in addition to alcohol intoxication, bruising on the parietal area of the head was a factor in cardiac arrest immediately after injury. Analysis of model mice showed that cellular senescence is related to the exacerbation of traumatic brain injury. Moreover, phosphorylation of H2AX, a marker of DNA damage by immunohistochemistry, was observed on the injured side of the cerebrum after DN injury, suggesting that post-injury DNA damage is involved in the exacerbation mechanism of brain injury.

Academic Significance and Societal Importance of the Research Achievements

外傷性脳損傷は受傷後に増悪する場合があり、重症化機序の解明は患者の後遺症低減や救命につながる。ヒト剖検例の解析では、交通事故損傷の特徴を明らかにすると共に、受傷直後の急死例では、飲酒酩酊に加え、頭頂部の打撲が受傷直後の心停止の要因であることが判明し、頭部打撲によって心停止を来た人にはその場に居合わせた人による心肺蘇生が重要と考えられた。外傷性脳損傷のモデルマウスを用いた解析では、外傷性脳損傷の増悪に細胞老化が関係していることが判明し、また、脳損傷の増悪機序に受傷後のDNA損傷が関係していることが示唆され、受傷後の脳内でのDNAの持続的損傷の抑制は脳損傷の低減につながると考えられた。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (17 results)

All 2021 2020 2019 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results,  Open Access: 4 results) Presentation (3 results) Remarks (2 results)

  • [Journal Article] Response to Deaths Under the Spread of COVID-19 and Changes in Mortality Due to Changes in Behavior2021

    • Author(s)
      木林和彦
    • Journal Title

      IATSS Review

      Volume: 46 Issue: 1 Pages: 32-39

    • DOI

      10.24572/iatssreview.46.1_32

    • NAID

      130008059190

    • ISSN
      0386-1104, 2433-4537
    • Year and Date
      2021-06-30
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of autopsy cases involving individuals who experienced cardiopulmonary arrest immediately after sustaining minor head injuries2021

    • Author(s)
      Kibayashi K, Shimada R, Nakao KI
    • Journal Title

      Journal of Forensic and Legal Medicine

      Volume: 81 Pages: 102205-102205

    • DOI

      10.1016/j.jflm.2021.102205

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Preexisting Diabetes Mellitus on the Severity of Traumatic Brain Injury2021

    • Author(s)
      Tatara Y, Shimada R, Kibayashi K
    • Journal Title

      Journal of Neurotrauma

      Volume: 38 Issue: 7 Pages: 886-902

    • DOI

      10.1089/neu.2020.7118

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effectiveness of whole genome amplification prior to short tandem repeat analysis for degraded DNA2020

    • Author(s)
      Machida M, Kibayashi K
    • Journal Title

      Forensic Science International: Genetics

      Volume: 49 Pages: 102373-102373

    • DOI

      10.1016/j.fsigen.2020.102373

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A fatal case of diphenhydramine overdose after a suicidal ingestion of non-prescription drugs2020

    • Author(s)
      Nakao K, Kibayashi K
    • Journal Title

      Research and Practice of Forensic Medicine

      Volume: 63 Pages: 139-145

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A comparative analysis of miRNA expression in human saliva and human saliva-derived exosomes2020

    • Author(s)
      Taki T, Kibayashi K
    • Journal Title

      Research and Practice of Forensic Medicine

      Volume: 63 Pages: 147-152

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 変性試料に対するmIPEP法の有効性の検討2020

    • Author(s)
      町田光世,木林和彦
    • Journal Title

      DNA多型

      Volume: 28 Pages: 51-52

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Detection of cocaine and metabolites from mouse femur buried in soil.2019

    • Author(s)
      Nakao KI, Tatara Y, Kibayashi K.
    • Journal Title

      Legal Medicine

      Volume: 37 Pages: 1-6

    • DOI

      10.1016/j.legalmed.2018.11.005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Delayed death due to traumatic dissection of the common carotid artery after attempted suicide by hanging.2019

    • Author(s)
      Kibayashi K, Shimada R, Nakao KI.
    • Journal Title

      Medicine, Science and the Law

      Volume: 59 Issue: 1 Pages: 17-19

    • DOI

      10.1177/0025802418825390

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Senescence-associated-β-galactosidase staining following traumatic brain injury in the mouse cerebrum2019

    • Author(s)
      Tominaga T, Shimada R (corresponding author), Okada Y, Kawamata T, Kibayashi K
    • Journal Title

      PLOS ONE

      Volume: 14(3) Issue: 3 Pages: e0213673-e0213673

    • DOI

      10.1371/journal.pone.0213673

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prevention of head trauma and death in patients with head injuries: A forensic autopsy study.2019

    • Author(s)
      Kibayashi K.
    • Journal Title

      IATSS Research

      Volume: 43 Issue: 2 Pages: 71-74

    • DOI

      10.1016/j.iatssr.2019.06.004

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis and prevention of traffic fatalities and injuries from the perspective of forensic medicine.2019

    • Author(s)
      Kibayashi K.
    • Journal Title

      IATSS Research

      Volume: 43 Issue: 2 Pages: 69-70

    • DOI

      10.1016/j.iatssr.2019.06.003

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 抗凝固薬ワルファリン内服時の遅発性外傷性頭蓋内出血 剖検例の報告とモデル動物での検証2021

    • Author(s)
      木林和彦、多々良有紀、中尾賢一朗
    • Organizer
      第90回日本法医学会学術関東地方集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 外傷性脳損傷モデルマウスにおける髄膜リンパ管内皮細胞の遺伝子発現変化2021

    • Author(s)
      島田 亮、多々良有紀、木林和彦
    • Organizer
      第90回日本法医学会学術関東地方集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 糖尿病マウスにおける外傷性脳損傷の悪化と炎症関連細胞の動態2020

    • Author(s)
      多々良有紀、木林和彦
    • Organizer
      第104次日本法医学会学術全国集会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 東京女子医科大学医学部法医学講座

    • URL

      https://www.twmu.ac.jp/legal-m/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 東京女子医科大学医学部法医学講座

    • URL

      http://www.twmu.ac.jp/legal-m/index.html

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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