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Growth and cytopathogenicity of herpes simplex virus in a macrophage cell line, RAW264: A good indicator of
Y M Jiang1, T Daikoku, M Yamamoto
1Laboratory of Virology, Nagoya University School of Medicine, Japan.
Abstract:
Macrophages are known to play a critical role in host resistance to herpes simplex virus (HSV). In this study, we investigate the interaction between various HSV strains with different virulence and a murine macrophage cell line, RAW264. Highly attenuated strains replicated poorly in RAW264 cells and were cleared from the cultures. For the eleven viruses tested, there was good correlation between intraperitoneal pathogenicity for adult mice and replication in RAW264 cells. It was also shown that interferon alpha/beta was involved in restricted replication of some strains.
Insights
Macrophages resist herpes simplex virus (HSV) infection. This study shows that less virulent HSV strains replicate poorly in mouse macrophages (RAW264 cells), correlating with reduced pathogenicity in mice and involving interferon.
Area of Science:
- Immunology
- Virology
- Cell Biology
Background:
- Macrophages are crucial for host defense against herpes simplex virus (HSV).
- Understanding HSV strain interactions with macrophages is key to deciphering viral pathogenesis and host immunity.
Purpose of the Study:
- To investigate the replication of diverse HSV strains with varying virulence in a murine macrophage cell line (RAW264).
- To correlate in vitro viral replication with in vivo pathogenicity in a mouse model.
- To explore the role of interferon in HSV replication within macrophages.
Main Methods:
- Culturing of RAW264 murine macrophage cells.
- Inoculation with eleven different herpes simplex virus strains of varying virulence.
- Assessment of viral replication within macrophage cultures.
- Correlation analysis between in vitro replication and intraperitoneal pathogenicity in adult mice.
- Investigation of interferon alpha/beta involvement.
Main Results:
- Highly attenuated HSV strains exhibited poor replication in RAW264 cells and were cleared.
- A strong correlation was observed between intraperitoneal pathogenicity in mice and RAW264 cell replication for all eleven tested viruses.
- Interferon alpha/beta was implicated in restricting the replication of certain HSV strains.
Conclusions:
- Macrophage (RAW264) replication serves as a reliable indicator of HSV virulence and pathogenicity.
- Interferon plays a role in the host defense mechanism against specific HSV strains by limiting viral replication in macrophages.