Mouse monoclonal antibody with specificity for human interferon gamma

Area of Science:

• Immunology
• Virology
• Biotechnology

Background:

• Interferons (IFNs) are crucial cytokines with antiviral properties.
• Specific antibodies are needed for precise manipulation and study of IFNs.
• Human interferon gamma (HuIFN-gamma) plays a key role in immune responses.

Purpose of the Study:

• To develop a highly specific monoclonal antibody (MAb) targeting human interferon gamma (HuIFN-gamma).
• To characterize the neutralizing and binding properties of the developed MAb.
• To assess the potential of the MAb for HuIFN-gamma purification.

Main Methods:

• Hybridoma technology was used to generate MAbs by fusing NS-1 myeloma cells with mouse spleen lymphocytes.
• Antiviral activity neutralization was assessed using the inhibition of nucleic acid synthesis (INAS) assay.
• Specificity was confirmed via indirect immunoprecipitation and SDS-PAGE analysis.
• A Sepharose affinity column was constructed using the MAb for purification.

Main Results:

• A specific IgM MAb targeting HuIFN-gamma was successfully developed.
• The MAb demonstrated potent neutralization of HuIFN-gamma's antiviral activity without affecting HuIFN-alpha or HuIFN-beta.
• SDS-PAGE revealed immunoprecipitation of a 47 kD molecule, with reduced forms at 26 kD and 21 kD.
• The MAb-based affinity column effectively retained and purified HuIFN-gamma.

Conclusions:

• A novel monoclonal antibody highly specific for HuIFN-gamma has been generated.
• This MAb possesses significant neutralizing capacity and can be utilized for HuIFN-gamma purification.
• The developed MAb is a valuable tool for research involving human interferon gamma.