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Updated: Aug 20, 2026

Induction of Experimental Autoimmune Encephalomyelitis in Mice and Evaluation of the Disease-dependent Distribution of Immune Cells in Various Tissues
08:47

Induction of Experimental Autoimmune Encephalomyelitis in Mice and Evaluation of the Disease-dependent Distribution of Immune Cells in Various Tissues

Published on: May 8, 2016

Proinflammatory bacterial peptidoglycan as a cofactor for the development of central nervous system autoimmune

Lizette Visser1, Hendrik Jan de Heer, Leonie A Boven

  • 1Department of Immunology, Erasmus MC-University Medical Center, Rotterdam, The Netherlands.

Journal of Immunology (Baltimore, Md. : 1950)
|January 7, 2005
PubMed

Insights

Peptidoglycan (PGN) from Staphylococcus aureus can trigger experimental autoimmune encephalomyelitis (EAE), a multiple sclerosis model. PGN promotes dendritic cell maturation and autoreactive T cell responses, suggesting new therapeutic targets for MS.

Area of Science:

  • Neuroimmunology
  • Microbial Immunology
  • Autoimmunity

Background:

  • Dendritic cells (DCs) initiate immune responses upon microbial stimulation via Toll-like receptors (TLRs).
  • Peptidoglycan (PGN), a bacterial cell wall component, is found in the central nervous system (CNS) of multiple sclerosis (MS) patients and signals through TLRs and NOD receptors.

Purpose of the Study:

  • To investigate the role of Staphylococcus aureus PGN in inducing experimental autoimmune encephalomyelitis (EAE), an animal model for MS.
  • To elucidate the mechanisms by which PGN influences dendritic cell function and T cell responses in the context of EAE.

Main Methods:

  • Induction of EAE in mice using an encephalitogenic myelin oligodendrocyte glycoprotein peptide, with and without the addition of PGN.
  • In vitro assessment of PGN's effects on dendritic cell (DC) antigen uptake, maturation, and stimulation of Th1 cell expansion, activation, and cytokine production.

Main Results:

  • Mice immunized with myelin oligodendrocyte glycoprotein peptide plus PGN developed EAE, while those immunized without PGN did not.
  • PGN significantly enhanced DC-mediated antigen uptake, maturation, and promoted the expansion and activation of autoreactive Th1 cells.
  • PGN induced the production of proinflammatory cytokines, crucial for EAE development.

Conclusions:

  • Staphylococcus aureus PGN can act as a potent trigger for experimental autoimmune encephalomyelitis (EAE) by promoting dendritic cell maturation and autoreactive Th1 cell responses.
  • PGN-mediated signaling, potentially through TLRs on DCs in peripheral lymph nodes and the CNS, may disrupt self-tolerance and contribute to EAE pathogenesis.
  • PGN signaling pathways represent potential novel therapeutic targets for the treatment of multiple sclerosis.

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