Cancer therapy with the T cell growth factor interleukin (IL)-2 is limited by low response rates and toxicity. Multiple protein engineering strategies have attempted to improve IL-2 therapy, typically through enhanced IL-2 receptor (IL-2R) binding. Intriguingly, Mo et al. show that an IL-2R partial agonist may dramatically improve IL-2 responses by altering T cell differentiation.
Keywords: CAR T cell; IL-2 mimetic; IL-2 receptor; T cell exhaustion.
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