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CUTTING EDGE |
* Center for Neurologic Diseases, Brigham and Women’s Hospital, Boston, MA 02115;
Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, and Department of Neurology, Harvard Medical School, Boston, MA 02115; and
Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305
Female B10.S mice are highly resistant to proteolipid protein (PLP) 139–151-induced experimental autoimmune encephalomyelitis (EAE) and depletion of PLP 139–151-reactive CD4+CD25+ regulatory T (Treg) cells can slightly increase their EAE susceptibility. Although male B10.S mice are moderately susceptible to EAE, we report that depletion of Treg cells in male B10.S mice before immunization with PLP 139–151 renders them highly susceptible to severe EAE with more CNS neutrophil infiltrates than nondepleted controls. Increased susceptibility is associated with an enhanced PLP 139–151-specific T cell response and greater production of IFN-
, IL-6, and IL-17. Male CD4+CD25– effector cells depleted of Treg cells proliferate to a greater degree than those from females in response to either anti-CD3 or PLP 139–151. These data suggest that because of their capacity to regulate potent autoaggressive effector cells, Treg cells partly contribute to the resistance to autoimmunity in the male mice.
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