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    Nat Med. 2006 Feb;12(2):214-9. Epub 2006 Jan 29.

    A novel dendritic cell subset involved in tumor immunosurveillance.

    Taieb J, Chaput N, Ménard C, Apetoh L, Ullrich E, Bonmort M, Péquignot M, Casares N, Terme M, Flament C, Opolon P, Lecluse Y, Métivier D, Tomasello E, Vivier E, Ghiringhelli F, Martin F, Klatzmann D, Poynard T, Tursz T, Raposo G, Yagita H, Ryffel B, Kroemer G, Zitvogel L.

    Source

    ERM0208 INSERM, Faculté de Médecine Kremlin Bicêtre, Institut Gustave Roussy, Villejuif, France.

    Abstract

    The interferon (IFN)-gamma-induced TRAIL effector mechanism is a vital component of cancer immunosurveillance by natural killer (NK) cells in mice. Here we show that the main source of IFN-gamma is not the conventional NK cell but a subset of B220(+)Ly6C(-) dendritic cells, which are atypical insofar as they express NK cell-surface molecules. Upon contact with a variety of tumor cells that are poorly recognized by NK cells, B220(+)NK1.1(+) dendritic cells secrete high levels of IFN-gamma and mediate TRAIL-dependent lysis of tumor cells. Adoptive transfer of these IFN-producing killer dendritic cells (IKDCs) into tumor-bearing Rag2(-/-)Il2rg(-/-) mice prevented tumor outgrowth, whereas transfer of conventional NK cells did not. In conclusion, we identified IKDCs as pivotal sensors and effectors of the innate antitumor immune response.

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    PMID:
    16444265
    [PubMed - indexed for MEDLINE]

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