Death by differentiation: CD4<sup>+</sup> T cells kick out suspicious stem cells.

Tomei, Sara; Audiger, Cindy; Naik, Shalin H · Cell Stem Cell · 2022

editorial · Level V

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Abstract

Antigen presentation is typically regarded as the domain of immune cells such as dendritic cells and B cells. Hernandez-Malmierca et al. (2022) upend this notion by observing that hematopoietic stem and progenitor cells process and present antigen via major histocompatibility class II as a means of CD4<sup>+</sup> T cell-mediated immune surveillance.

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