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In vitro infection of murine macrophages with Junin virus
Abstract:
Mouse peritoneal macrophages were successfully infected with two strains of Junin virus producing high titers with no apparent cell damage. Infected cultures survived longer than noninfected cultures. The pattern of virus release suggested a persistent infection. Virus replication was delayed in macrophages from mice previously immunized with Junin virus. These results support the opinion that macrophages are targets for virus replication in vivo infections.
Insights
Mouse macrophages can be infected with Junin virus, showing persistent infection without cell damage. Prior immunization delayed virus replication, indicating macrophages are key targets for Junin virus in vivo.
Area of Science:
- Virology
- Immunology
- Cell Biology
Background:
- Junin virus is a significant human pathogen.
- Macrophages play a crucial role in innate and adaptive immunity.
- Understanding host-pathogen interactions in macrophages is vital for controlling viral infections.
Purpose of the Study:
- To investigate the susceptibility of mouse peritoneal macrophages to Junin virus infection.
- To characterize the replication and release patterns of Junin virus in macrophages.
- To determine the effect of prior immunization on Junin virus replication in macrophages.
Main Methods:
- Infection of mouse peritoneal macrophages with two Junin virus strains.
- Monitoring of virus titers and cell viability.
- Assessment of virus replication in macrophages from immunized and non-immunized mice.
Main Results:
- Macrophages were successfully infected, producing high virus titers with no apparent cell damage.
- Infected macrophage cultures exhibited prolonged survival compared to controls.
- Virus release patterns suggested a persistent infection.
- Previous immunization with Junin virus delayed viral replication in macrophages.
Conclusions:
- Mouse peritoneal macrophages are susceptible to Junin virus infection.
- Macrophages support persistent Junin virus replication.
- Prior immunization confers some protection by delaying viral replication in macrophages.
- Macrophages are identified as significant cellular targets for Junin virus replication in vivo.