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Molecular determinants of Theiler's murine encephalomyelitis-induced disease
1Department of Neurology/MC2030, University of Chicago Medical Center, Illinois 60637, USA.
Abstract:
Theiler's murine encephalomyelitis virus (TMEV) strains are divided into two subgroups on the basis of their differing disease phenotypes. Members of the GDVII subgroup, such as GDVII strain, produce an acute lethal polioencephalomyelitis. In contrast, members of the TO subgroup, such as DA strain, induce a persistent infection with chronic demyelination; this white matter disease serves as an experimental model of multiple sclerosis (MS) due to their similar pathology and because the immune system in both diseases appears to contribute to the demyelination. The availability of full-length infectious TMEV clones, the relative simplicity of the TMEV genome, and the availability of the mouse as a host provide the opportunity to identify molecular determinants and disease mechanisms that are responsible for neurovirulence, demyelination and virus persistence, and makes this a valuable system for pathogenesis studies.
Insights
Theiler's murine encephalomyelitis virus (TMEV) causes distinct diseases. TO subgroup strains model multiple sclerosis (MS) by inducing chronic demyelination, offering insights into neurovirulence and persistence.
Area of Science:
- Neurovirology
- Immunology
- Pathogenesis
Background:
- Theiler's murine encephalomyelitis virus (TMEV) exhibits two distinct disease phenotypes based on strain subgroups.
- GDVII subgroup strains cause acute lethal polioencephalomyelitis.
- TO subgroup strains induce persistent infections and chronic demyelination, serving as a model for multiple sclerosis (MS).
Purpose of the Study:
- To investigate the molecular determinants and mechanisms underlying TMEV-induced neurovirulence, demyelination, and viral persistence.
- To leverage the TMEV-DA strain as a model for studying MS pathogenesis.
Main Methods:
- Utilizing full-length infectious TMEV clones.
- Employing the mouse model for pathogenesis studies.
- Analyzing viral genome and host immune responses.
Main Results:
- The study identifies TMEV strains with differing neurovirulence and disease outcomes.
- TMEV-DA strain effectively models chronic demyelination and MS pathology.
- The role of the immune system in TMEV-induced demyelination is highlighted.
Conclusions:
- TMEV offers a valuable experimental system for studying neuroinflammatory diseases like MS.
- Understanding TMEV pathogenesis can reveal mechanisms of viral persistence and demyelination.
- Molecular determinants of TMEV disease phenotypes are key targets for future research.