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In vivo studies of parainfluenza I (6/94) virus: mononuclear cell interactions
Abstract:
Adsorption to and penetration of migratory mononuclear cells in vivo by Para-influenza I (6/94) virus were documented by electron microscopy during the acute phase of an experimental meningoencephalitis in ICR mice. Phagocytosis of virions was the apparent and predominant mode of viral entry into these cells. Penetration by fusion was also seen. Nucleocapsids were replicated by the mononuclear cells which became a potential reservoir for the further spread of virus.
Insights
Para-influenza virus enters mononuclear cells via phagocytosis and fusion during meningoencephalitis in mice. These infected cells replicate nucleocapsids, becoming a reservoir for further viral spread.
Area of Science:
- Virology
- Immunology
- Neuroscience
Background:
- Para-influenza virus infections can cause central nervous system disease.
- Mononuclear cells play a role in viral infections and immune responses.
- Understanding viral entry mechanisms is crucial for developing antiviral strategies.
Purpose of the Study:
- To investigate the interaction between Para-influenza virus and migratory mononuclear cells in vivo.
- To elucidate the mechanisms of viral entry into these cells during experimental meningoencephalitis.
Main Methods:
- Electron microscopy was used to visualize viral adsorption and penetration.
- Experiments were conducted during the acute phase of experimental meningoencephalitis in ICR mice.
Main Results:
- Para-influenza virus (6/94) was documented to adsorb to and penetrate migratory mononuclear cells in vivo.
- Phagocytosis was the predominant mode of viral entry, with fusion also observed.
- Mononuclear cells replicated viral nucleocapsids, indicating their role as a viral reservoir.
Conclusions:
- Migratory mononuclear cells are susceptible to Para-influenza virus infection.
- The observed viral entry mechanisms highlight the complex interplay between the virus and the host immune system.
- Infected mononuclear cells can contribute to the dissemination of Para-influenza virus within the host.