Interference induced in GL-V3 monkey kidney cells by rabies virus strains

Area of Science:

• Virology
• Cell Biology
• Immunology

Background:

• Rabies virus exhibits diverse strains with varying biological properties.
• Understanding viral interference is crucial for controlling viral infections and developing vaccines.
• Monkey kidney cells are a common model for studying viral replication and host-cell interactions.

Purpose of the Study:

• To investigate the phenomenon of viral interference in monkey kidney cells infected with different rabies virus strains.
• To determine if rabies virus infection confers resistance to superinfection by vesicular stomatitis virus (VSV).
• To analyze the relationship between interference, viral antigen expression, and infectious virus yield.

Main Methods:

• Infection of GL-V3 monkey kidney cells with different strains of rabies virus (CVS-11, Pitman Moore, LEP Flury, ERA).
• Superinfection assay using vesicular stomatitis virus (VSV) to assess resistance.
• Specific immunofluorescent staining to detect intracellular rabies virus antigen.
• Quantification of infectious virus yields.

Main Results:

• Resistance to VSV superinfection was observed with CVS-11, Pitman Moore, and LEP Flury rabies virus strains, but not with the ERA strain.
• Immunofluorescence revealed an increase in rabies antigen-positive foci following interference onset, correlating with higher infectious virus yields.
• Despite differences in inducing interference, CVS-11 and ERA strains produced similar virus yields.

Conclusions:

• Specific rabies virus strains can induce a state of resistance to superinfection in monkey kidney cells.
• The observed interference does not appear to impede the replication or spread of the inducing rabies virus.
• The findings suggest that viral interference in this context is a complex phenomenon potentially unrelated to in vivo infection characteristics.