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Current Drug Metabolism


ISSN (Print): 1389-2002
ISSN (Online): 1875-5453

Tryptophan Catabolism in IDO+ Plasmacytoid Dendritic Cells

Author(s): Francesca Fallarino, S. Gizzi, P. Mosci, U. Grohmann and P. Puccetti

Volume 8, Issue 3, 2007

Page: [209 - 216] Pages: 8

DOI: 10.2174/138920007780362581

Price: $65


Plasmacytoid dendritic cells (pDCs) represent a specialized cell population that produces large amounts of type I interferons, the so-called natural interferon-producing cells. Recently, murine and human pDCs have been credited with a unique ability to express indoleamine 2,3-dioxygenase (IDO) and to mediate immunosuppression in specific settings. This suggests an important role for IDOexpressing pDCs in controlling the balance of inflammation and tolerance. Here we review recent advances in our understanding of how these cells may be critical at the interface of inflammation and tolerance and discuss the potential for therapeutic IDO modulation as an immunoregulatory maneuver targeting pDC function.

Keywords: Plasmacytoid dendritic cells, Regulatory T cells, Tryptophan, Kynurenines, Tolerance

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