کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3064523 | 1580444 | 2010 | 7 صفحه PDF | دانلود رایگان |
Autoaggressive, myelin-reactive T cells are involved in multiple sclerosis and its prototype experimental autoimmune encephalomyelitis (EAE) in mice. A peripheral negative feedback mechanism involving regulatory CD4+ and CD8+T cells (Treg) operates to suppress disease-mediating T cell responses. We have recently characterized a novel population of Qa-1a-restricted, TCR-peptide-reactive CD8αα+TCRαβ+ Treg that induce apoptotic depletion of the encephalitogenic Vβ8.2 cells in vivo and provide protection from EAE. Here we have used mice deficient in perforin, Fas/FasL and IFN-γ molecules to investigate their role in Treg-mediated regulation of EAE. Data show that Fas/FasL interactions are not involved, but regulation mediated by Treg is dependent on the presence of IFN-γ and the perforin pathway. These data provide a molecular mechanism of Treg-mediated killing of the pathogenic T cells and have important implications in the design of immune interventions for demyelinating disease.
Journal: Journal of Neuroimmunology - Volume 229, Issues 1–2, 15 December 2010, Pages 91–97