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Paramyxovirus-like particles associated with acute demyelination in chronic relapsing multiple sclerosis
Science (New York, N.Y.)
|November 17, 1972
Summary
Researchers found paramyxovirus-like particles in the brains of multiple sclerosis patients. These findings suggest a potential viral trigger for multiple sclerosis lesions in the central nervous system.
Area of Science:
- Neurology
- Virology
- Pathology
Background:
- Multiple sclerosis (MS) is a chronic inflammatory disease affecting the central nervous system (CNS).
- The etiology of MS remains incompletely understood, with viral infections being a suspected factor.
Purpose of the Study:
- To investigate the ultrastructural characteristics of demyelinating lesions in a multiple sclerosis brain.
- To identify potential etiological agents within the lesions.
Main Methods:
- Electron microscopy was used to examine formalin-fixed brain tissue from a multiple sclerosis subject.
- Specific attention was paid to perivenous demyelinating lesions and associated cellular infiltrates.
Main Results:
- Nuclear and cytoplasmic particles resembling paramyxovirus nucleocapsids were observed.
- These particles, measuring 18-20 nm in diameter, were located within mononuclear cells near central veins and in areas of active demyelination.
Conclusions:
- The presence of paramyxovirus-like particles suggests a potential viral role in the initiation of multiple sclerosis lesions.
- It is hypothesized that lymphocytes carrying a latent paramyxovirus may seed the CNS white matter, triggering demyelination.