The mechanisms that govern the development of adaptive-like NK cells are elusive. Shemesh et al. (2022. J. Exp. Med.https://doi.org/10.1084/jem.20220551) report that the development of FcRγ−/low adaptive-like NK cells requires reduced mTOR activity and depends on TGF-β or IFN-α. These findings provide exciting new molecular blueprints explaining the development and functions of adaptive-like NK cells.

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