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Related Experiment Video

Updated: Sep 23, 2025

Author Spotlight: Novel Assay for Studying B-Cell Responses in Multiple Sclerosis Research
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SARS-CoV-2 and Multiple Sclerosis: Potential for Disease Exacerbation.

Madison MacDougall1,2, Jad El-Hajj Sleiman3, Philippe Beauchemin3

  • 1Department of Biological Sciences, Salisbury University, Salisbury, MD, United States.

Frontiers in Immunology
|May 16, 2022
PubMed
Summary

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may exacerbate multiple sclerosis (MS) by invading the central nervous system, triggering glial inflammation, and potentially damaging myelin. Further research is crucial to understand these neuroimmune effects.

Keywords:
COVID-19SARS-CoV-2adaptive immunityblood-brain barriercytokine stormexperimental autoimmune encephalomyelitismultiple sclerosisneuroinflammation

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Area of Science:

  • Neuroimmunology
  • Infectious Diseases
  • Neurology

Background:

  • The respiratory pathogen SARS-CoV-2 primarily enters through the respiratory tract but also affects the central nervous system (CNS).
  • Case reports indicate SARS-CoV-2 patients develop demyelinating lesions in the brain, spinal cord, and optic nerve, suggesting links to neuroimmune disorders like multiple sclerosis (MS).
  • The precise cellular mechanisms linking SARS-CoV-2 to neuroinflammation and demyelination remain unclear.

Purpose of the Study:

  • To review existing literature on the potential relationship between SARS-CoV-2 infection and neuroimmune demyelinating diseases, specifically MS.
  • To propose a hypothesis explaining how SARS-CoV-2 infection might exacerbate MS symptoms.

Main Methods:

  • Literature review of studies on coronaviruses (SARS-CoV, SARS-CoV-2, murine coronaviruses) and their impact on the CNS.
  • Analysis of proposed pathways for viral entry and spread within the CNS.
  • Examination of potential immunological mechanisms, including glial response and molecular mimicry.

Main Results:

  • Coronaviruses, including SARS-CoV-2, can invade the CNS via the olfactory bulb and retrograde transport.
  • A hypothesized glial inflammatory response may lead to oligodendrocyte damage and blood-brain barrier (BBB) disruption.
  • Molecular mimicry and T-cell stimulation against myelin are potential mechanisms for disease exacerbation.

Conclusions:

  • SARS-CoV-2 neuroinvasion may contribute to demyelination and worsen MS symptoms.
  • Understanding the neuroimmune effects of SARS-CoV-2 is critical, given the global prevalence of MS (nearly 3 million individuals).
  • Further research is imperative to elucidate the adverse effects of SARS-CoV-2 on myelin and MS exacerbation.