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Blood, 15 April 2008, Vol. 111, No. 8, pp. 4245-4253. Prepublished online as a Blood First Edition Paper on February 7, 2008; DOI 10.1182/blood-2007-03-081398. This Article Full Text Full Text (PDF) Supplemental Figures All Versions of this Article: blood-2007-03-081398v1 111/8/4245    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Meyer-Wentrup, F. Articles by Adema, G. J. Search for Related Content PubMed PubMed Citation Articles by Meyer-Wentrup, F. Articles by Adema, G. J. Related Collections Immunobiology Chemokines, Cytokines, and Interleukins Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  IMMUNOBIOLOGY Targeting DCIR on human plasmacytoid dendritic cells results in antigen presentation and inhibits IFN- production Friederike Meyer-Wentrup1, Daniel Benitez-Ribas1, Paul J. Tacken1, Cornelis J. A. Punt2, Carl G. Figdor1, I. Jolanda M. de Vries1, and Gosse J. Adema1 Departments of1 Tumor Immunology and 2 Medical Oncology, Radboud University Nijmegen Medical Centre and Nijmegen Centre for Molecular Life Sciences, Nijmegen, The Netherlands C-type lectin receptors (CLRs) fulfill multiple functions within the immune system by recognition of carbohydrate moieties on foreign or (altered) self-structures. CLRs on myeloid dendritic cells (DCs) have been well characterized as pattern-recognition receptors (PRRs) combining ligand internalization with complex signaling events. Much less is known about CLR expression and function in human plasmacytoid DCs (pDCs), the major type I interferon (IFN) producers. In this study, we demonstrate that, next to the CLR BDCA-2, human pDCs express DC immunoreceptor (DCIR), a CLR with putative immune-inhibitory function, but not dectin-1, mannose receptor, or DC-specific ICAM-3–grabbing nonintegrin. DCIR surface levels are reduced on pDC maturation after TLR9 triggering. Interestingly, DCIR triggering inhibits TLR9-induced IFN- production while leaving up-regulation of costimulatory molecule expression unaffected. Furthermore, DCIR is readily internalized into pDCs after receptor triggering. We show that DCIR internalization is clathrin-dependent because it can be inhibited by hypertonic shock and dominant-negative dynamin. Importantly, antigens targeted to pDCs via DCIR are presented to T cells. These findings indicate that targeting DCIR on pDCs not only results in efficient antigen presentation but also affects TLR9-induced IFN- production. Collectively, the data show that targeting of DCIR can modulate human pDC function and may be applied in disease preven-tion and treatment. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: C. Sadaka, M.-A. Marloie-Provost, V. Soumelis, and P. Benaroch Developmental regulation of MHC II expression and transport in human plasmacytoid-derived dendritic cells Blood, March 5, 2009; 113(10): 2127 - 2135. [Abstract] [Full Text] [PDF] F. Meyer-Wentrup, A. Cambi, B. Joosten, M. W. Looman, I. J. M. de Vries, C. G. Figdor, and G. J. Adema DCIR is endocytosed into human dendritic cells and inhibits TLR8-mediated cytokine production J. Leukoc. Biol., March 1, 2009; 85(3): 518 - 525. [Abstract] [Full Text] [PDF] A. A. Lambert, C. Gilbert, M. Richard, A. D. Beaulieu, and M. J. Tremblay The C-type lectin surface receptor DCIR acts as a new attachment factor for HIV-1 in dendritic cells and contributes to trans- and cis-infection pathways Blood, August 15, 2008; 112(4): 1299 - 1307. [Abstract] [Full Text] [PDF]

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