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Regeneration of oligodendroglia during recovery from demyelinating disease
Science (New York, N.Y.)
|February 18, 1977
Abstract:
Infection of mice with the JHM strain of mouse hepatitis virus causes demyelination as a result of a cytolytic infection of oligodendroglia. In recovery, animals show remyelination, which could result either from surviving oligodendrocytes extending their territory or by generation of new oligodendroglia. Electron microscopic autoradiographic studies with 3H-labeled thymidine demonstrate that the cells associated with remyelination are newly generated oligodendroglia.
Insights
Mouse hepatitis virus infection causes demyelination. During recovery, new oligodendroglia, not surviving cells, generate the remyelination observed in the central nervous system.
Area of Science:
- Neuroscience
- Virology
- Cell Biology
Background:
- Mouse hepatitis virus (JHM strain) infection in mice leads to demyelination.
- Demyelination results from a cytolytic infection of oligodendroglia, the myelin-producing cells in the central nervous system.
Purpose of the Study:
- To investigate the cellular source of remyelination following JHMV-induced demyelination in mice.
- To determine whether remyelination arises from existing oligodendrocytes or newly generated cells.
Main Methods:
- Utilized electron microscopic autoradiography.
- Employed 3H-labeled thymidine to trace cell proliferation and differentiation.
Main Results:
- Demonstrated that cells responsible for remyelination are newly generated oligodendroglia.
- Provided evidence against remyelination solely by expansion of existing oligodendrocyte territory.
Conclusions:
- The study concludes that the generation of new oligodendroglia is the primary mechanism for remyelination after JHMV infection.
- Highlights the regenerative capacity of the central nervous system through oligodendrocyte neogenesis.