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Dendritic cell-specific transcript: dendritic cell marker and regulator of TLR-induced cytokine production

Dendritic cell-specific transcript: dendritic cell marker and regulator of TLR-induced cytokine production

Journal of Immunology 189(1): 138-145

Dendritic cells (DCs) are the professional APCs of the immune system that dictate the type and course of an immune response. Molecular understanding of DC biology is important for the design of DC-based immunotherapies and optimal clinical applications in vaccination settings. Previously, we isolated and characterized the cDNA-encoding dendritic cell-specific transcript (DC-SCRIPT; also known as ZNF366). DC-SCRIPT mRNA expression in the immune system was confined to DCs and was reported to be an early hallmark of DC differentiation. In this study, we demonstrate IL-4 to be the dominant factor for DC-SCRIPT expression in human monocyte-derived DCs. In addition, to our knowledge, we show for the first time endogenous DC-SCRIPT protein expression in human DCs both in vitro and in situ. DC-SCRIPT protein is detected early upon differentiation of monocytes into DCs and is also present in multiple freshly isolated DC subsets. Maturation of DCs with TLR ligands further increased DC-SCRIPT mRNA expression, suggesting a role in DC maturation. Indeed, small interfering RNA-mediated knockdown of DC-SCRIPT affected the cytokine response upon TLR stimulation. These DCs displayed enhanced IL-10 and decreased IL-12 production, compared with wild-type DCs. Silencing of IL-10 in DC-SCRIPT knockdown DCs rescued IL-12 expression, suggesting a primary role for DC-SCRIPT in the regulation of IL-10 production.

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Accession: 036460765

Download citation: RISBibTeXText

PMID: 22615205

DOI: 10.4049/jimmunol.1103709

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