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Meningeal Memories of Viral Infection

Liliana M Sanmarco1, Francisco J Quintana2

  • 1Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.

Trends in Neurosciences
|June 30, 2019
PubMed

Insights

Meningeal macrophages (MMs) in the dura mater are crucial for detecting infections. Replenishing MMs with peripheral monocytes impairs their ability to respond to microbes, highlighting a vulnerability during viral infections.

Area of Science:

  • Neuroimmunology
  • Infectious Disease Immunology

Background:

  • The dura mater harbors tissue-resident macrophages, originating from yolk sac precursors.
  • Meningeal macrophages (MMs) play a role in the central nervous system's immune surveillance.

Purpose of the Study:

  • To investigate the impact of peripheral monocyte infiltration on meningeal macrophage function during viral infection.

Main Methods:

  • The study likely involved analyzing immune cell populations in the dura mater during viral challenge.
  • Investigated the origin and replenishment dynamics of meningeal macrophages.

Main Results:

  • Peripheral monocyte-derived cells were found to infiltrate the meningeal macrophage compartment.
  • This replenishment process was associated with a diminished capacity of meningeal macrophages to detect and respond to microbial pathogens.

Conclusions:

  • The replenishment of meningeal macrophages by peripheral monocytes can compromise the immune defense of the central nervous system against viral infections.
  • Understanding these dynamics is crucial for developing therapeutic strategies targeting neuroinflammation.
Keywords:
meningeal macrophagesneuroimmunologyviral infection

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