Downregulation of IL-17 and IL-6 in the central nervous system by glatiramer acetate in experimental autoimmune encephalomyelitis
- PMID: 18804287
- DOI: 10.1016/j.jneuroim.2008.07.018
Downregulation of IL-17 and IL-6 in the central nervous system by glatiramer acetate in experimental autoimmune encephalomyelitis
Abstract
T helper 17 (Th17) cells are pivotal in the immune pathogenesis of EAE. Glatiramer acetate (GA) can enhance Treg FOXp3 expression. We demonstrate that GA downregulates the expression of both IL-17 and IL-6 in two different EAE models. Increased mRNA expression in CNS for ROR gamma t, IL-17, IL-12/IL-23, IL-6, TNF-alpha, STAT4 and Th1 cytokines were significantly reduced by GA with a concomitant rise in SMAD3. The increased expression of TNF-alpha, IL-6, and IL-17 in CNS of CD25+ depleted animals was suppressed by GA treatment. This study demonstrates that both Th1 polarization and Th17 expression are modulated by GA.
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