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Optimized Protocol for Efficient Transfection of Dendritic Cells without Cell Maturation
08:08

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Published on: July 8, 2011

IFN-beta inhibits dendritic cell migration through STAT-1-mediated transcriptional suppression of CCR7 and matrix

Jui-Hung Yen1, Weimin Kong, Doina Ganea

  • 1Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA 19140, USA.

Journal of Immunology (Baltimore, Md. : 1950)
|March 2, 2010
PubMed

IFN-beta is an approved therapeutic option for the treatment of multiple sclerosis. The molecular mechanisms underlying the effects of IFN-beta in multiple sclerosis are not fully understood. Migration of dendritic cells (DCs) from the inflammatory site to draining lymph nodes for Ag presentation and activation of naive T cells and to the CNS for reactivation of encephalitogenic T cells requires CCR7 and matrix metalloproteinase (MMP)-9 expression. This article reports for the first time that IFN-beta inhibits CCR7 expression and MMP-9 production in mature DCs and reduces their migratory capacity. The effect of IFN-beta is mediated through STAT-1. In vivo treatment with IFN-beta results in lower numbers of DCs migrating to the draining lymph node following exposure to FITC and in reduced expression of CCR7 and MMP-9 in splenic CD11c(+) DCs following LPS administration. IFN-beta and IFN-gamma share the same properties in terms of their effects on CCR7, MMP-9, and DC migration, but they have opposite effects on IL-12 production. In addition, IFN-beta-treated DCs have a significantly reduced capacity for activating CD4(+) T cells and generating IFN-gamma-producing Th1 cells. The suppression of mature DC migration through negative regulation of CCR7 and MMP-9 expression represents a novel mechanism for the therapeutic effect of IFN-beta.

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