The Critical Role of IL-12 and the IL-12R Beta 2 Subunit in the Generation of Pathogenic Autoreactive Th1 Cells

Overview

Journal Springer Semin Immunopathol

Specialty Allergy & Immunology

Date 2000 Feb 10

PMID 10666772

Citations 21

Authors

E M Shevach

J T Chang

B M Segal

Affiliations

Soon will be listed here.

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-12R beta 2 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-12R beta 2 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-12R beta 2 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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