Abstract
Experimental Allergic Encephalomyelitis (EAE) is a demyelinating disease of the central nervous system which is an animal model for the human autoimmune disease, multiple sclerosis. EAE is mediated by CD4+ T cells and the T cells responsible for disease induction produce Th1 cytokines. IL-12 produced by monocytes and dendritic cells is the most critical factor which influences the development and differentiation of pathogenic autoreactive Th1 cells. Here, we review our recent studies on the critical contributions of IL-12 and the IL-12Rβ2 subunit to the generation of autoreactive effector cells which mediate EAE. In addition, we discuss the potential contribution of IL-18 to the upregulation of the IL-12/IL-12Rβ2 pathway and the contribution of the suppressor cytokines, IL-4 and IL-10, in downregulating this pathway. Collectively, our studies demonstrate that the IL-12/IL-12Rβ2 pathway is a critical intermediary in the process of Th1 differentiation which can be both positively or negatively regulated. This pathway remains an attractive immunotherapeutic target for blockade of function with inhibitory reagents or downregulation by Th2 cytokines.
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Shevach, E.M., Chang, J.T. & Segal, B.M. The critical role of IL-12 and the IL-12Rβ2 subunit in the generation of pathogenic autoreactive Th1 cells. Springer Semin Immunopathol 21, 249–262 (1999). https://doi.org/10.1007/BF00812256
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DOI: https://doi.org/10.1007/BF00812256