Identification of phagocytosis regulators using magnetic genome-wide CRISPR screens.

Identification of phagocytosis regulators using magnetic genome-wide CRISPR screens.
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DOI:
10.1038/s41588-018-0254-1
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发表时间:
2018-12
期刊:
影响因子:
30.8
通讯作者:
Bassik MC
Bassik MC
中科院分区:
生物学1区
文献类型:
--
作者:
Haney MS;Bohlen CJ;Morgens DW;Ousey JA;Barkal AA;Tsui CK;Ego BK;Levin R;Kamber RA;Collins H;Tucker A;Li A;Vorselen D;Labitigan L;Crane E;Boyle E;Jiang L;Chan J;Rincón E;Greenleaf WJ;Li B;Snyder MP;Weissman IL;Theriot JA;Collins SR;Barres BA;Bassik MC

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Phagocytosis is required for a broad range of physiological functions, from pathogen defense to tissue homeostasis, but mechanisms required for phagocytosis of diverse substrates remain incompletely understood. Here, we develop a rapid magnet-based phenotypic screening strategy, and perform eight genome-wide CRISPR screens in human cells to identify genes regulating phagocytosis of distinct substrates. After validating select hits in focused mini-screens, orthogonal assays and primary human macrophages, we demonstrate that 1) the previously-uncharacterized gene NHLRC2 is a central player in phagocytosis, regulating RhoA-Rac1 signaling cascades that control actin polymerization and filopodia formation, 2) very long chain fatty acids are essential for efficient phagocytosis of certain substrates, and 3) the previously-uncharacterized Alzheimer’s disease-associated gene TM2D3 can preferentially influence uptake of amyloid-β aggregates. These findings illuminate new regulators and core principles of phagocytosis, and more generally establish an efficient method for unbiased identification of cellular uptake mechanisms across diverse physiological and pathological contexts.
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