Monoclonal antibodies to hepatitis B surface antigen: production and characterization

Area of Science:

• Immunology
• Biotechnology

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.
• Monoclonal antibodies offer high specificity for developing diagnostic assays.

Purpose of the Study:

• To produce hybridomas secreting monoclonal antibodies against HBsAg.
• To develop and evaluate a novel enzyme immunoassay (EIA) for HBsAg detection using these antibodies.

Main Methods:

• Hybridoma technology: Fusion of SP2/0 myeloma cells with splenocytes from HBsAg-immunized mice.
• Characterization of monoclonal antibodies: Idiotype (IgG1) and epitope specificity (subtype a determinant) analysis.
• Assay development: Creation of an EIA for HBsAg detection.
• Comparative analysis: Performance evaluation of the developed EIA against a commercial ELISA kit (Sevatest ELISA HBsAg/micro I).

Main Results:

• Successfully generated hybridoma clones secreting anti-HBsAg antibodies.
• All characterized antibodies were of the IgG1 idiotype and recognized the subtype a determinant of HBsAg.
• Developed a functional enzyme immunoassay for HBsAg detection.
• The developed EIA demonstrated potential for clinical application in HBsAg screening.

Conclusions:

• Monoclonal antibodies targeting the HBsAg subtype a determinant were successfully produced.
• A novel enzyme immunoassay utilizing these monoclonal antibodies is a viable tool for HBsAg detection.
• This assay shows promise for improved diagnostics in Hepatitis B management.