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A targeted therapy is one that has been developed to affect a specific target, such as an enzyme or receptor. Targeted therapies can either block or increase the function of their target in order to treat a given disease; in this case, cancer.
In this Viewpoint article, we asked four scientists working to target important, but so-called 'undruggable', proteins in cancer for their opinions on the most crucial advances, as well as the challenges and what the future holds for this important area of cancer research.