Abstract
Natural killer (NK) cells are cytotoxic cells that mediate anti-tumor and anti-viral immunity. The response of NK cells to different cytokines and stimuli may involve cell survival, proliferation, and changes in their cytotoxic function. These responses will be supported by changes in cellular metabolism. Therefore, changes in NK metabolic parameters could somehow predict changes in NK cell function and cytotoxicity. In this chapter, we describe a protocol to measure NK cell metabolism in primary human NK cells by using an extracellular flux analyzer. This machine measures pH and oxygen changes in the medium and allows the study of NK cell glycolysis and mitochondrial respiration in real time with a small number of cells.
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