[Immunohistochemical detection of myocardial hypoxia]

Area of Science:

• Forensic Pathology
• Cardiovascular Pathology
• Biomarker Research

Background:

• Myoglobin and fibrinogen are critical proteins in myocardial tissue.
• Detecting hypoxia and asphyxia in deceased individuals is crucial for forensic investigations.
• Immunohistochemistry offers a sensitive method for protein analysis in tissue.

Purpose of the Study:

• To investigate the utility of myoglobin and fibrinogen immunohistochemistry in identifying hypoxia and asphyxia.
• To correlate protein changes with cause of death, specifically focusing on suffocation and violent deaths.
• To establish the sensitivity of these markers for detecting prolonged hypoxia or intensive asphyxia.

Main Methods:

• Immunohistochemical analysis of myocardial tissue from 45 deceased individuals.
• Utilized antibodies against myoglobin and fibrinogen.
• Compared findings across groups: natural causes, suffocation, violent death without hypoxia, and control (heart infarction).

Main Results:

• Suffocated individuals (66%) showed decreased/absent myoglobin and (70%) positive fibrinogen in myocardial fibers.
• Violent deaths without hypoxia exhibited myoglobin decrease and fibrinogen positivity in 14% of cases.
• Control group with heart infarction had 100% focal myoglobin absence.

Conclusions:

• Immunohistochemistry for myoglobin and fibrinogen is a sensitive indicator of prolonged hypoxia or severe asphyxia.
• These protein alterations can manifest rapidly, aiding in determining the cause of death.
• The study validates the use of these markers in forensic pathology for assessing oxygen deprivation.