RT Book, Section A1 Trinchieri, Giorgio A1 Childs, Richard W. A1 Lanier, Lewis L. A2 Kaushansky, Kenneth A2 Prchal, Josef T. A2 Burns, Linda J. A2 Lichtman, Marshall A. A2 Levi, Marcel A2 Linch, David C. SR Print(0) ID 1178737619 T1 The Biology of Innate Lymphoid Cells and Natural Killer Cells T2 Williams Hematology, 10e YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9781260464122 LK hemonc.mhmedical.com/content.aspx?aid=1178737619 RD 2024/04/18 AB SUMMARYInnate lymphoid cells (ILCs) are a distinct lineage of lymphocytes that differ from immune lymphoid cells by not expressing somatically rearranged genes encoding antigen specific receptors. They are important in maintaining the homeostasis of different tissues and they have been classified into group 1, 2, and 3 based on their homology in functions and cytokine production with the T-helper subsets Th1, Th2, and Th22/17, respectively. Natural killer (NK) cells are now considered to belong to group 1 ILCS. NK cells have a constitutive ability to mediate cytotoxicity of pathologic target cells and to secrete cytokines, participate in the innate resistance to intracellular pathogens and malignancies, and have a modulatory effect on adaptive immunity and hematopoiesis. NK cell activity is regulated by the opposite effects of activating and inhibitory receptors.