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A Primary Neuron Culture System for the Study of Herpes Simplex Virus Latency and Reactivation
Published on: April 2, 2012
Multifocal CNS demyelination following peripheral inoculation with herpes simplex virus type 1
Annals of Neurology
|July 1, 1987
Summary
Herpes simplex virus type 1 (HSV-1) infection in mice causes varied central nervous system (CNS) damage. Susceptible strains develop multifocal demyelinating lesions, suggesting an immune-mediated process in CNS demyelination.
Area of Science:
- Neuroimmunology
- Virology
- Pathology
Background:
- Herpes simplex virus type 1 (HSV-1) peripheral inoculation causes central nervous system (CNS) demyelination in animals.
- The unifocal nature of these lesions limits their relevance to multiple sclerosis (MS).
Purpose of the Study:
- To investigate the spectrum of CNS pathology induced by HSV-1 in different inbred mouse strains.
- To explore the role of viral cytolysis versus immune-mediated processes in HSV-1-induced demyelination.
Main Methods:
- Inbred mice strains with varying resistance to HSV-1 mortality were used.
- Central nervous system (CNS) pathology, viral titration, and oligodendrocyte cultures were analyzed.
- Immunofluorescence and electron microscopy were employed.
Main Results:
- Resistant strains showed focal inflammation, moderately resistant strains had unifocal demyelination, and susceptible strains developed multifocal demyelinating lesions.
- Direct viral cytolysis contributed to trigeminal root entry zone lesions.
- In vitro studies revealed strain-specific differences in oligodendrocyte resistance to HSV-1.
- Multifocal lesions in susceptible mice appeared after infectious virus clearance, suggesting an immune-mediated mechanism.
Conclusions:
- Mouse strain genetic background influences the development and distribution of HSV-1-induced CNS demyelinating lesions.
- Both direct viral effects and immune-mediated responses contribute to HSV-1-induced CNS pathology.
- This model offers insights into the pathogenesis of immune-mediated CNS demyelination triggered by viral infections.
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