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Targeting IL-2 to the endoplasmic reticulum confines autocrine growth stimulation to NK-92 cells.
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Abstract
Anti-tumor effects mediated by adoptively transferred natural killer (NK) cells are dependent on the presence of interleukin-2 (IL-2). IL-2 is considered to be a survival factor for NK cells and an enhancer of their cytotoxic potential. However, systemic administration of IL-2 is frequently impeded by undesirable side effects, such as high toxicity and nonlocalized administration. Genetic modification of NK cells expressing IL-2 in a localized and controlled manner could be a powerful tool for overcoming these obstacles.