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Title

Myeloid-derived suppressor cells limit the inflammation by promoting T lymphocyte apoptosis in the spinal cord of a murine model of multiple sclerosis.

AuthorsMoliné-Velázquez, Verónica; Cuervo, Henar ; Vila-del Sol, Virginia ; Ortega, María Cristina; Clemente, Diego; Castro Soubriet, Fernando de
KeywordsApoptosis
Demyelination
EAE
Immunomodulation
Lymphocyte
Macrophage
Remyelination
Issue Date2011
PublisherWiley-Blackwell
CitationBrain Pathology 21(6):678-91 (2011)
AbstractMultiple Sclerosis (MS) is a demyelinating/inflammatory disease of the central nervous system. Relapsing-remitting MS is characterized by a relapsing phase with clinical symptoms and the production of inflammatory cell infiltrates, and a period of remission during which patients recover partially. Myeloid-derived suppressor cells (MDSCs) are immature cells capable of suppressing the inflammatory response through Arginase-I (Arg-I) activity, among other mechanisms. Here, we have identified Arg-I+-MDSCs in the spinal cord during experimental autoimmune encephalomyelitis (EAE), cells that were largely restricted to the demyelinating plaque and that always exhibited the characteristic MDSC surface markers Arg-I/CD11b/Gr-1/M-CSF1R. The presence and density of Arg-I+-cells, and the proportion of apoptotic but not proliferative T cells, were correlated with the EAE time course: peaked in parallel with the clinical score, decreased significantly during the remitting phase and completely disappeared during the chronic phase. Spinal cord-isolated MDSCs of EAE animals augmented the cell death when co-cultured with stimulated control splenic CD3 T cells. These data point to an important role for MDSCs in limiting inflammatory damage in MS, favoring the relative recovery in the remitting phase of the disease. Thus, the MDSC population should be considered as a potential therapeutic target to accelerate the recovery of MS patients.
Publisher version (URL)http://dx.doi.org/10.1111/j.1750-3639.2011.00495.x
URIhttp://hdl.handle.net/10261/75150
DOI10.1111/j.1750-3639.2011.00495.x
ISSN1015-6305
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