Journal
BRAIN
Volume 132, Issue -, Pages 2487-2500Publisher
OXFORD UNIV PRESS
DOI: 10.1093/brain/awp144
Keywords
autoimmune encephalitis; chemokines; monocytes; multiple sclerosis
Categories
Funding
- Deutsche Forschungsgemeinschaft
- Gemeinnutzige Hertie-Stiftung
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The chemokine receptor CCR2 plays a vital role for the induction of autoimmunity in the central nervous system. However, it remains unclear how the pathogenic response is mediated by CCR2-bearing cells. By combining bone marrow chimerism with gene targeting we detected a mild disease-modulating role of CCR2 during experimental autoimmune encephalomyelitis, a model for central nervous system autoimmunity, on radio-resistant cells that was independent from targeted CCR2 expression on endothelia. Interestingly, absence of CCR2 on lymphocytes did not influence autoimmune demyelination. In contrast, engagement of CCR2 on accessory cells was required for experimental autoimmune encephalomyelitis induction. CCR2Ly-6C(hi) monocytes were rapidly recruited to the inflamed central nervous system and were crucial for the effector phase of disease. Selective depletion of this specific monocyte subpopulation through engagement of CCR2 strongly reduced central nervous system autoimmunity. Collectively, these data indicate a disease-promoting role of CCR2Ly-6C(hi) monocytes during autoimmune inflammation of the central nervous system.
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