Abstract
Microbiology Most human cells, not just those belonging to the immune system, mount protective responses to infection when activated by the immune cytokine interferon-gamma (IFN-γ). How IFN-γ confers this function in nonimmune cells and tissues is poorly understood. Gaudet et al. used genome-scale CRISPR/Cas9 gene editing to identify apolipoprotein L-3 (APOL3) as an IFN-γ–induced bactericidal protein that protects human epithelium, endothelium, and fibroblasts against infection (see the Perspective by Nathan). APOL3 directly targets bacteria in the host cell cytosol and kills them by dissolving their anionic membranes into lipoprotein complexes. This work reveals a detergent-like mechanism enlisted during human cell-autonomous immunity to combat intracellular pathogens. Science , abf8113, this issue p. [eabf8113][1]; see also abj5637, p. [276][2] [1]: /lookup/doi/10.1126/science.abf8113 [2]: /lookup/doi/10.1126/science.abj5637
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