[Usage of double immuno-enzyme labeled staining method in forensic pathology]

Area of Science:

• Biochemical staining techniques
• Immunohistochemistry
• Forensic science applications

Context:

• Traditional staining methods can lack sensitivity or permanence.
• Forensic pathology requires reliable methods for antigen detection in autopsy tissues.
• Distinguishing between different antigens in tissue samples is crucial for accurate diagnosis.

Purpose:

• To develop and validate a double immunoenzyme staining method for detecting specific antigens.
• To utilize the differential colorimetric reactions of Horse Radish Peroxidase (HRP) for enhanced visualization.
• To assess the method's efficacy in forensic autopsy samples.

Summary:

• A novel double immunoenzyme staining method was developed using Horse Radish Peroxidase (HRP).
• The method employs two distinct chromogenic substrates (DAB-CoCl2/H2O2 and DAB/H2O2) to produce remarkable color contrast (blue-black and brown).
• This technique was successfully applied to detect heart and brain antigens in forensic autopsy specimens, demonstrating high sensitivity, simplicity, and cost-effectiveness.

Impact:

• Provides a highly sensitive, economical, and stable staining technique for forensic pathology.
• Enables clear differentiation of antigens, aiding in accurate post-mortem analysis.
• The long-lasting nature of stained sections facilitates archival and future reference in forensic investigations.