Author: Zhao, Jingxian; Zhao, Jincun; Fett, Craig; Trandem, Kathryn; Fleming, Erica; Perlman, Stanley
Title: IFN-?– and IL-10–expressing virus epitope-specific Foxp3(+) T reg cells in the central nervous system during encephalomyelitis Document date: 2011_8_1
ID: k751ryv4_3
Snippet: Foxp3 + CD4 regulatory T cells (T reg cells) are important in limiting immunopathology in infections. However, identifying pathogen-specific epitopes targeted by these cells has been elusive. Using MHC class II/peptide tetramers and intracellular cytokine staining, we identify T reg cells recognizing two virus-specific CD4 T cell epitopes in the coronavirusinfected central nervous system as well as naive T cell precursor pools. These T reg cells .....
Document: Foxp3 + CD4 regulatory T cells (T reg cells) are important in limiting immunopathology in infections. However, identifying pathogen-specific epitopes targeted by these cells has been elusive. Using MHC class II/peptide tetramers and intracellular cytokine staining, we identify T reg cells recognizing two virus-specific CD4 T cell epitopes in the coronavirusinfected central nervous system as well as naive T cell precursor pools. These T reg cells are detected at the same time as effector T cells (T eff cells) exhibiting the same specificity and can suppress T eff cell proliferation after stimulation with cognate peptide. These virus-specific T reg cells may be especially effective in inhibiting the immune response during the peak of infection, when virus antigen is maximal. Furthermore, these T reg cells express both IL-10 and IFN-î§ after peptide stimulation. IFN-î§ expression is maintained during both acute and chronic phases of infection. Identification of T reg cell target epi-
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