PMID- 16998790 OWN - NLM STAT- MEDLINE DCOM- 20061221 LR - 20160303 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 119 IP - 12 DP - 2006 Dec 15 TI - Melanoma cells interfere with the interaction of dendritic cells with NK/LAK cells. PG - 2861-9 AB - Dendritic cells (DCs) and natural killer (NK) cells are key players at the interface between innate resistance and acquired immunity. NK cells can induce DC maturation, a differentiation process whereby DCs respond to a environmental stimulus and acquire the ability of eliciting adaptive immunity. Conversely, maturing DCs promote NK functions in vivo and in vitro. This interplay has important consequences on the immune response to pathogens and possibly to neoplastic cells. Here, we show that B16 melanoma cells actively modulate the interaction between DCs derived from bone marrow precursors and NK/LAK cells propagated from the spleen of C57BL/6 mice. DCs increased in a dose-dependent manner the ability of NK/LAK cells to kill melanoma cells and to produce cytokines. This activatory cross-talk entailed the production of IL-18 by DCs and of IFN-gamma by NK/LAK cells. Melanoma cells were not a passive target of NK activity; they regulated the outcome of the interaction between DCs and NK/LAK cells, inhibiting the in vitro production of cytokines as effectively as the genetic deletion of IL-18 or IFN-gamma. Interference with the NK/DC interaction possibly represents a mechanism used by growing tumors to evade the immune response. CI - Copyright 2006 Wiley-Liss, Inc. FAU - Capobianco, Annalisa AU - Capobianco A AD - Department of Oncology, Cancer Immunotherapy and Gene Therapy Program, Clinical Immunology Unit, H San Raffaele Scientific Institute & Vita-Salute San Raffaele University, Milano, Italy. FAU - Rovere-Querini, Patrizia AU - Rovere-Querini P FAU - Rugarli, Claudio AU - Rugarli C FAU - Manfredi, Angelo A AU - Manfredi AA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (Interleukin-18) RN - 0 (Tumor Necrosis Factor-alpha) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - Cell Communication MH - Cell Line, Tumor MH - Coculture Techniques MH - Cytotoxicity Tests, Immunologic MH - Dendritic Cells/cytology/immunology/*metabolism MH - Female MH - Interferon-gamma/genetics/metabolism MH - Interleukin-18/genetics/metabolism MH - Killer Cells, Lymphokine-Activated/cytology/immunology/*metabolism MH - Killer Cells, Natural/cytology/immunology/*metabolism MH - Male MH - Melanoma/immunology/*metabolism/pathology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Time Factors MH - Tumor Necrosis Factor-alpha/metabolism EDAT- 2006/09/26 09:00 MHDA- 2006/12/22 09:00 CRDT- 2006/09/26 09:00 PHST- 2006/09/26 09:00 [pubmed] PHST- 2006/12/22 09:00 [medline] PHST- 2006/09/26 09:00 [entrez] AID - 10.1002/ijc.22279 [doi] PST - ppublish SO - Int J Cancer. 2006 Dec 15;119(12):2861-9. doi: 10.1002/ijc.22279.