title: NKp46-mediated Dicer1 inactivation results in defective NK-cell differentiation and effector functions in mice.
abstract: MicroRNAs control developmental pathways and effector functions in immune cells. Previous studies have studied the role of microRNAs in natural killer (NK) cells. However, the mouse models of microRNA depletion used were nonNK-specific and only partially depleting, hampering the interpretation of the data obtained. To clarify the role of microRNAs in murine NK cells, we deleted the RNase III enzyme Dicer1 in NKp46-expressing cells. We observed a drastic decrease in several microRNAs specifically in NK cells. Furthermore, the overall size of the "NK-cell" pool was severely decreased, a phenotype associated with compromised survival. Moreover, performing a broad flow cytometry profiling, we show that Dicer1-deficient NK cells failed to complete their differentiation program. In particular, several integrins were inappropriately expressed in mature NK cells. These defects coincided with decreased response to IL-15, a cytokine responsible for "NK-cell" maturation and survival. In addition, Dicer1 deletion impaired key "NK-cell" functions: target cell killing and production of IFN-γ, leading to defective control of metastasis. Dicer1 deletion thus affects "NK-cell" biology in a cell intrinsic manner at several distinct stages.
authors.affiliation: CIRI, Centre International de Recherche en Infectiologie, International Center for Infectiology Research, Lyon, France.|Inserm, U1111, Lyon, France.|Ecole Normale Supérieure de Lyon, Lyon, France.|Université Lyon 1, Lyon, France.|CNRS, UMR5308, Lyon, France.
authors.forename: Sophie
authors.initials: S
authors.lastname: Degouve
authors.affiliation: CIRI, Centre International de Recherche en Infectiologie, International Center for Infectiology Research, Lyon, France.|Inserm, U1111, Lyon, France.|Ecole Normale Supérieure de Lyon, Lyon, France.|Université Lyon 1, Lyon, France.|CNRS, UMR5308, Lyon, France.
authors.forename: Armelle
authors.initials: A
authors.lastname: Tavares
authors.affiliation: CIRI, Centre International de Recherche en Infectiologie, International Center for Infectiology Research, Lyon, France.|Inserm, U1111, Lyon, France.|Ecole Normale Supérieure de Lyon, Lyon, France.|Université Lyon 1, Lyon, France.|CNRS, UMR5308, Lyon, France.|Laboratoire d'Immunologie, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Viel
authors.affiliation: CIRI, Centre International de Recherche en Infectiologie, International Center for Infectiology Research, Lyon, France.|Inserm, U1111, Lyon, France.|Ecole Normale Supérieure de Lyon, Lyon, France.|Université Lyon 1, Lyon, France.|CNRS, UMR5308, Lyon, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Walzer
authors.affiliation: CIRI, Centre International de Recherche en Infectiologie, International Center for Infectiology Research, Lyon, France.|Inserm, U1111, Lyon, France.|Ecole Normale Supérieure de Lyon, Lyon, France.|Université Lyon 1, Lyon, France.|CNRS, UMR5308, Lyon, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Marçais
mesh_terms: D000818:Animals; D000950:Antigens, Ly / Q000235:genetics / Q000378:metabolism*; D002454:Cell Differentiation; D003602:Cytotoxicity, Immunologic; D053487:DEAD-box RNA Helicases / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005434:Flow Cytometry; D006410:Hematopoiesis; D007371:Interferon-gamma / Q000378:metabolism; D019409:Interleukin-15 / Q000378:metabolism; D007694:Killer Cells, Natural / Q000276:immunology*; D008213:Lymphocyte Activation; D051379:Mice; D018345:Mice, Knockout; D035683:MicroRNAs / Q000235:genetics*; D055627:Natural Cytotoxicity Triggering Receptor 1 / Q000235:genetics / Q000378:metabolism*; D043244:Ribonuclease III / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D000950:Antigens, Ly; D019409:Interleukin-15; D035683:MicroRNAs; D055627:Natural Cytotoxicity Triggering Receptor 1; C118384:Ncr1 protein, mouse; D007371:Interferon-gamma; C509781:Dicer1 protein, mouse; D043244:Ribonuclease III; D053487:DEAD-box RNA Helicases
keywords: Cytotoxicity ⋅ Dicer1 ⋅ IFN-γ ⋅ MicroRNA ⋅ NK cells