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Role of ion channels in natural killer cell function towards cancer.

Progression of cancer to advanced states is associated with treatment resistance and metastatic spread -- features that are linked to poor prognosis and patient mortality. Investigations into potential new treatments to reduce cancer spread are ongoing, with immunotherapy generating much interest. Natural killer (NK) cells are part of the body's innate immune system and are known for their ability to target and lyse cancer cells. Ion channels have previously been linked to the growth and development of tumors, but recent research suggests that these channels may also serve to alter immune cell functioning. This review examines the current understanding as to the role of ion channels in NK cells and how manipulation of these channels may increase NK effectiveness in targeting and removing cancer cells. With a large number of existing FDA-approved drugs targeting ion channels, potential exists for drug repurposing in order to improve immunotherapy and thus patient outcomes.