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In vivo interference in vesicular stomatitis virus infection
Infection and Immunity
|February 1, 1977
Summary
Inactivated vesicular stomatitis virus particles protect mice from infection through two distinct mechanisms. One provides immediate broad-spectrum protection, while the second, strain-specific effect is linked to antibody development.
Area of Science:
- Virology
- Immunology
- Neuroscience
Background:
- Vesicular stomatitis virus (VSV) infection can cause significant disease.
- Defective interfering particles (DIPs) of VSV have been investigated for their protective potential.
- The mechanisms underlying VSV protection by viral particles are not fully elucidated.
Purpose of the Study:
- To investigate the protective mechanisms of inactivated VSV particles against homologous and heterologous viral challenges in mice.
- To differentiate between interference and immunological mechanisms in VSV-induced protection.
Main Methods:
- Adult mice were intracerebrally inoculated with inactivated defective interfering and complete VSV particles.
- Mice were subsequently challenged with homologous or heterologous VSV strains, rabies virus, or foot-and-mouth disease virus.
- Protective effects were assessed over time, and correlation with neutralizing antibody presence was examined.
Main Results:
- Inactivated VSV particles conferred protection against homologous virus challenge.
- Two distinct protective processes were identified: an immediate, broad-spectrum effect and a later, strain-specific effect.
- The immediate protection was effective against heterologous VSV, rabies, and foot-and-mouth disease viruses.
- The later protection correlated with the presence of circulating neutralizing antibodies.
Conclusions:
- Inactivated VSV particles induce dual protective mechanisms in mice.
- The findings suggest that immunological mechanisms, particularly antibody production, play a significant role in the protective effects of VSV particles, challenging previous interference-based hypotheses.