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Forensic significance of intracardiac stress protein expression in acute myocardial ischemia

Research Project

Project/Area Number 22K19676
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 58:Society medicine, nursing, and related fields
Research InstitutionWakayama Medical University

Principal Investigator

Ishida Yuko  和歌山県立医科大学, 医学部, 准教授 (10364077)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsHeme oxygenase-1 / 突然死 / 急性虚血性心疾患 / HO-1 / 急性心筋梗塞 / 熱ショックタンパク質 / 超早期生活反応
Outline of Research at the Start

法医実務において,死因確定は最も重要な実務の一つであり,その際客観性および正確性が求められる.冠動脈閉塞による急性心筋梗塞は突然死をきたす重篤な疾患であるが,その死因診断法は未だ確立しているとは言えない.本研究は,ストレスタンパク質HSPの超早期発現を指標とする死因判定法の開発と,法医実務への応用の可能性を検討するものであり,剖検試料を用いた実務的検討である.実際の法医解剖で得られた心臓組織における種々のHSP発現を遺伝子レベルおよびタンパク質レベルで評価し,法医実務においてこれら分子の発現が死因判定のための有用な指標となるか否かについて検討する.

Outline of Final Research Achievements

Heme oxygenase-1 (HO-1), an inducible stress-response protein, exerts anti-oxidant and anti-apoptotic effects. However, its significance in forensic diagnosis of acute ischemic heart diseases (AIHD) such as myocardial infarction is still unknown. We examined the immunohistochemical expression of HO-1 in the heart samples to discuss their forensic significance to determine acute cardiac ischemia. The heart samples were obtained from 23 AIHD cases and 33 non-AIHD cases as controls. HO-1 positive signals in cardiomyocyte nuclear were detected in 78.2% of AIHD cases, however, that were detected in only 24.2% control cases with statistical difference between AIHD and non-AIHD groups. From the viewpoints of forensic pathology, intracardiac HO-1 expression would be considered a valuable marker to diagnose AIHD as the cause of death.

Academic Significance and Societal Importance of the Research Achievements

本研究では、急性心筋虚血の法医学的診断に有用なマーカーHO-1を提案した。法医学の現場では、単一のマーカーで死因や傷の年齢、傷口の活力などを明確に評価することは困難である。これに伴い、法医学的安全性の観点から、早期心筋虚血の診断に理想的な単一の免疫組織化学反応は存在しない。HO-1だけでなく、C5b-9やフィブロネクチンなど複数の異なるマーカーを併用することで、より客観的で正確な早期心筋障害の評価が可能となり、肉眼的あるいは顕微鏡的な証拠が不十分な場合のAIHDの死後診断の進歩に貢献することが期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (1 results)

All 2023

All Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Forensic significance of intracardiac expressions of HO-1 and Nrf2 in acute myocardial ischemia2023

    • Author(s)
      石田裕子
    • Organizer
      Wakayama Medical University International Symposium -Forensic Medicine-
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2022-07-05   Modified: 2025-01-30  

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