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Updated: May 27, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Viruses and multiple sclerosis
Gregory P Owens1, Don Gilden, Mark P Burgoon
1Department of Neurology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
Abstract:
Multiple sclerosis (MS) is a chronic demyelinating disorder of unknown etiology, possibly caused by a virus or virus-triggered immunopathology. The virus might reactivate after years of latency and lyse oligodendrocytes, as in progressive multifocal leukoencephalopathy, or initiate immunopathological demyelination, as in animals infected with Theiler's murine encephalomyelitis virus or coronaviruses. The argument for a viral cause of MS is supported by epidemiological analyses and studies of MS in identical twins, indicating that disease is acquired. However, the most important evidence is the presence of bands of oligoclonal IgG (OCBs) in MS brain and CSF that persist throughout the lifetime of the patient. OCBs are found almost exclusively in infectious CNS disorders, and antigenic targets of OCBs represent the agent that causes disease. Here, the authors review past attempts to identify an infectious agent in MS brain cells and discuss the promise of using recombinant antibodies generated from clonally expanded plasma cells in brain and CSF to identify disease-relevant antigens. They show how this strategy has been used successfully to analyze antigen specificity in subacute sclerosing panencephalitis, a chronic encephalitis caused by measles virus, and in neuromyelitis optica, a chronic autoimmune demyelinating disease produced by antibodies directed against the aquaporin-4 water channel.
Insights
Multiple sclerosis (MS) may be caused by a virus. Identifying viral targets using recombinant antibodies from patient samples offers a promising diagnostic approach for this chronic demyelinating disease.
Area of Science:
- Neuroimmunology
- Virology
- Neuropathology
Background:
- Multiple sclerosis (MS) is a chronic demyelinating disease of unknown cause, potentially linked to viral infections or immunopathology.
- Epidemiological data and twin studies suggest MS is acquired, not solely genetic.
- The presence of oligoclonal IgG bands (OCBs) in the central nervous system (CNS) of MS patients strongly indicates an infectious etiology.
Purpose of the Study:
- To review historical efforts in identifying infectious agents in MS.
- To explore the potential of using recombinant antibodies from plasma cells to identify disease-relevant antigens in MS.
- To demonstrate the utility of this strategy by comparing it to successful applications in other CNS disorders.
Main Methods:
- Review of past research on infectious agents in MS.
- Generation and analysis of recombinant antibodies from clonally expanded plasma cells in the brain and cerebrospinal fluid (CSF).
- Application of this technique to analyze antigen specificity in subacute sclerosing panencephalitis and neuromyelitis optica.
Main Results:
- OCBs in MS patients are specific and persist, suggesting they target the causative agent.
- The recombinant antibody strategy has proven effective in identifying specific antigens in other chronic CNS infections and autoimmune diseases.
- This approach holds promise for pinpointing the infectious agent or relevant antigens in MS.
Conclusions:
- Identifying the antigenic targets of OCBs is crucial for understanding MS etiology.
- Recombinant antibody technology provides a powerful tool for discovering disease-relevant antigens in MS.
- This method could lead to improved diagnostics and targeted therapies for multiple sclerosis.
Related Concept Videos
Multiple Sclerosis l: Introduction
Viral Meningitis
Encephalitis ll: Pathophysiology
Arboviral Encephalitis
Viruses with RNA Genomes
Viral Recombination
