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lüll CD1d-restricted iNKT cells, the Swiss-Army knife of the immune system Matsuda JL; Mallevaey T; Scott-Browne J; Gapin LCurr Opin Immunol 2008[Jun]; 20 (3): 358-68Natural Killer T cells are a distinct lymphocyte lineage that regulates a broad range of immune responses. NKT cells recognize glycolipids presented by the non-classical MHC molecule CD1d. Structural insight into the TCR/glycolipid/CD1d tri-complex has revealed an unusual and unexpected mode of recognition. Recent studies have also identified some of the signaling events during NKT cell development that give NKT cells their innate phenotype. Pathogen-derived glycolipid antigens continue to be found, and new mechanisms of NKT cell activation have been described. Finally, NKT cells have been shown to be remarkably versatile in function during various immune responses. Whether these extensive functional capacities can be attributed to a single population sensitive to environmental cues or if functionally distinct NKT cell subpopulations exist remains unresolved.|Animals[MESH]|Antigens, CD1/*metabolism[MESH]|Antigens, CD1d[MESH]|Antigens/immunology[MESH]|Cytokines/biosynthesis[MESH]|Cytotoxicity, Immunologic[MESH]|Humans[MESH]|Killer Cells, Natural/immunology[MESH]|Lymphocyte Activation[MESH]|Mice[MESH]|T-Lymphocyte Subsets/*immunology[MESH] |