Hidden virtues of interleukin-2
Interleukin-2 (IL-2) is an immunostimulatory cytokine that is being tested as an anticancer therapy due to its ability to activate T cells and natural killer cells. Unexpectedly, Raeber et al. discovered that IL-2 can also activate dendritic cells, an entirely different type of cells involved in antitumor immunity. The authors analyzed data from a clinical trial in human patients being treated with recombinant IL-2. They also pursued more detailed studies in mouse models to identify the mechanisms responsible for dendritic cell activation, helping to explain how IL-2 sensitizes tumors to immune destruction.
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