Related Experiment Video
Updated: Jun 26, 2026
Flow Cytometric Analysis of Lymphocyte Infiltration in Central Nervous System during Experimental Autoimmune Encephalomyelitis
Published on: November 17, 2020
Intracerebral dendritic cells critically modulate encephalitogenic versus regulatory immune responses in the CNS
Alla L Zozulya1, Sonja Ortler, JangEun Lee
1Department of Neurology, University of Würzburg, 97080 Würzburg, Germany.
Insights
Dendritic cells (DCs) in the brain can either worsen or prevent experimental autoimmune encephalomyelitis (EAE). Modulating DC function offers a potential therapeutic strategy for neuroinflammatory diseases like multiple sclerosis.
Area of Science:
- Neuroimmunology
- Cellular Immunology
- Autoimmune Diseases
Background:
- Dendritic cells (DCs) infiltrate the central nervous system (CNS) during inflammatory autoimmune disorders.
- The precise role of these intracerebral DCs in disease pathogenesis, such as in multiple sclerosis, remains incompletely understood.
Purpose of the Study:
- To investigate how the functional state of intracerebral dendritic cells influences neuroinflammation.
- To determine the impact of stimulatory versus tolerogenic DCs on experimental autoimmune encephalomyelitis (EAE) and associated T cell responses.
Main Methods:
- Intracerebral microinjection of either stimulatory or tumor necrosis factor alpha (TNFα)-modified (tolerogenic) dendritic cells in an EAE model.
- Assessment of EAE onset, clinical progression, T cell infiltration into the CNS, and peripheral/central cytokine profiles (IL-10, IL-17).
Main Results:
- Stimulatory DCs exacerbated EAE, leading to earlier T cell infiltration and reduced regulatory T cells (FoxP3+) in the brain.
- Tolerogenic DCs delayed or prevented EAE onset, promoting IL-10-producing lymphocytes peripherally and limiting IL-17 production within the CNS.
Conclusions:
- Intracerebral dendritic cell functional states critically regulate neuroinflammation in EAE.
- DCs act as a rate-limiting factor in neuroinflammation, suggesting potential therapeutic targeting for autoimmune CNS diseases.
Abstract:
Dendritic cells (DCs) appear in higher numbers within the CNS as a consequence of inflammation associated with autoimmune disorders, such as multiple sclerosis, but the contribution of these cells to the outcome of disease is not yet clear. Here, we show that stimulatory or tolerogenic functional states of intracerebral DCs regulate the systemic activation of neuroantigen-specific T cells, the recruitment of these cells into the CNS and the onset and progression of experimental autoimmune encephalomyelitis (EAE). Intracerebral microinjection of stimulatory DCs exacerbated the onset and clinical course of EAE, accompanied with an early T-cell infiltration and a decreased proportion of regulatory FoxP3-expressing cells in the brain. In contrast, the intracerebral microinjection of DCs modified by tumor necrosis factor alpha induced their tolerogenic functional state and delayed or prevented EAE onset. This triggered the generation of interleukin 10 (IL-10)-producing neuroantigen-specific lymphocytes in the periphery and restricted IL-17 production in the CNS. Our findings suggest that DCs are a rate-limiting factor for neuroinflammation.
Related Concept Videos
01:26Encephalitis ll: Pathophysiology
01:19Encephalitis l: Introduction
01:24T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...