Abstract
The NK cell compartment provides powerful innate defenses against virus-infected and tumor cells. Specific NK cell receptors control this process and maintain the immune system homeostasis and prevent autoimmunity. A wide variety of NK cell subsets with different functional capabilities exist and this reflects not only the different maturation stages of NK cells but also different microenvironments in which they can operate. In this review, we will give an overview on the various NK cell subsets present in peripheral blood of healthy donors in order to clearly and univocally identify them on the basis of their phenotypic traits using flow cytometry. © 2020 International Society for Advancement of Cytometry.
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