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Immunity. 2017 Feb 21;46(2):205-219. doi: 10.1016/j.immuni.2017.01.003. Epub 2017 Feb 9.

CD8+ T Cells Orchestrate pDC-XCR1+ Dendritic Cell Spatial and Functional Cooperativity to Optimize Priming.

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Institute of Experimental Immunology, University Hospital, University of Bonn, 53127 Bonn, Germany.
Molecular Immunology and Cell Biology, Life and Medical Sciences Institute, University of Bonn, 53115 Bonn, Germany.
Department of Microbiology and Immunology, The University of Melbourne, Peter Doherty Institute for Infection and Immunity, Parkville,VIC 3010, Australia.
Molecular Immunology, Robert-Koch-Institute, 13353 Berlin, Germany.
Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany.
Division of Immunology, Transplantation and Infectious Diseases and Experimental Imaging Center, IRCCS San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Via Olgettina 58, Milan 20132, Italy.
Institute of Pathology, Charité Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; Einstein Foundation Berlin, 10117 Berlin, Germany.
Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Wakayama 641-8509, Japan; Laboratory for Inflammatory Regulation, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama, Kanagawa 230-0045, Japan; Laboratory for Immune Regulation, World Premier International Research Center Initiative, Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan.
Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO 63108, USA.
Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892-0421, USA.
Institute of Experimental Immunology, University Hospital, University of Bonn, 53127 Bonn, Germany. Electronic address:


Adaptive cellular immunity is initiated by antigen-specific interactions between T lymphocytes and dendritic cells (DCs). Plasmacytoid DCs (pDCs) support antiviral immunity by linking innate and adaptive immune responses. Here we examined pDC spatiotemporal dynamics during viral infection to uncover when, where, and how they exert their functions. We found that pDCs accumulated at sites of CD8+ T cell antigen-driven activation in a CCR5-dependent fashion. Furthermore, activated CD8+ T cells orchestrated the local recruitment of lymph node-resident XCR1 chemokine receptor-expressing DCs via secretion of the XCL1 chemokine. Functionally, this CD8+ T cell-mediated reorganization of the local DC network allowed for the interaction and cooperation of pDCs and XCR1+ DCs, thereby optimizing XCR1+ DC maturation and cross-presentation. These data support a model in which CD8+ T cells upon activation create their own optimal priming microenvironment by recruiting additional DC subsets to the site of initial antigen recognition.


CCL3; CCL4; CCR5; CXCR3; XCL1; chemokine; cooperation; migration; spatiotemporal; viral infection

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