New radioimmunoadsorbent method for detection of hepatitis B surface antigen

Area of Science:

• Hepatology
• Immunodiagnostics
• Virology

Background:

• Hepatitis B virus (HBV) infection remains a significant global health concern.
• Accurate and sensitive detection of hepatitis B surface antigen (HBsAg) is crucial for diagnosis and management.
• Existing third-generation assays provide a benchmark for HBsAg detection methods.

Purpose of the Study:

• To describe a novel radioimmunoadsorbent assay for HBsAg detection.
• To evaluate the sensitivity and specificity of this new assay.
• To compare its performance against established commercial radioimmunoassay kits.

Main Methods:

• Utilized DEAE-cellulose columns for adsorbing HBsAg from serum or plasma.
• Employed 125I-labeled anti-HBsAg antibody for antigen detection.
• A single 2-hour incubation at 45°C was used in the assay procedure.

Main Results:

• Assay sensitivity was equivalent to other third-generation HBsAg tests.
• Specificity evaluation on 2,868 blood donors and 1,250 dialysis/hospital staff specimens showed high concordance with commercial kits.
• A low false positive rate of less than 1% was observed.

Conclusions:

• The described radioimmunoadsorbent assay is a sensitive and specific method for HBsAg detection.
• Its performance is comparable to existing third-generation assays.
• This assay presents a viable option for HBsAg screening in clinical diagnostics.