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Related Experiment Video

Updated: Nov 30, 2025

Induction of Experimental Autoimmune Encephalomyelitis in Mice and Evaluation of the Disease-dependent Distribution of Immune Cells in Various Tissues
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Sex differences in EAE reveal common and distinct cellular and molecular components.

Jack Wiedrick1, Roberto Meza-Romero2, Grant Gerstner3

  • 1Biostatistics and Design Program, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239, United States.

Cellular Immunology
|November 16, 2020
PubMed
Summary

Sex differences in immune responses influence experimental autoimmune encephalomyelitis (EAE) severity. Males show stronger pro-inflammatory reactions, but also more regulatory cells, balancing disease progression in this multiple sclerosis (MS) model.

Keywords:
B and T cellsCentral Nervous System (CNS)Complete Freund’s Adjuvant (CFA)Cytokine/chemokinesExperimental autoimmune encephalomyelitis (EAE)InflammationMacrophage migration inhibitory factor (MIF)Macrophages/monocytesMultiple sclerosis (MS)Pertussis toxin (PTx)Sex differences

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Area of Science:

  • Neuroimmunology
  • Immunology
  • Animal Models

Background:

  • Experimental autoimmune encephalomyelitis (EAE) models multiple sclerosis (MS), but adjuvant effects complicate interpretation.
  • Understanding sex-based immune responses is crucial for EAE and MS research.

Purpose of the Study:

  • To investigate sex differences in immune cell and chemokine responses in EAE and adjuvant-only models.
  • To correlate peripheral immune changes with central nervous system (CNS) pathology and clinical EAE severity.

Main Methods:

  • C57BL/6 mice (male vs. female) were induced with EAE (m)MOG-35-55/CFA/Ptx, CFA/Ptx alone, or left untreated.
  • Clinical, histological, spleen cellularity, and CNS chemokine profiles were analyzed.
  • Sophisticated statistical methods were used to analyze response curves.

Main Results:

  • Male mice exhibited heightened pro-inflammatory immune cell and cytokine/chemokine responses compared to females.
  • Males also showed increased regulatory T cells, B cells, and macrophages, partially counterbalancing inflammation.
  • Sex differences in peripheral immunity correlated with reduced CNS infiltration and demyelination in males, despite similar clinical EAE severity.

Conclusions:

  • Sex-based immune cell profiles significantly impact EAE pathogenesis and CNS pathology.
  • EAE severity is modulated by the balance between pro-inflammatory and regulatory immune components.
  • These findings highlight the importance of considering sex as a biological variable in EAE and MS research.