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- W1928407788 abstract "Phagocytosis is an actin-based process used by macrophages to clear particles greater than 0.5 μm in diameter. In addition to its role in immunological responses, phagocytosis is also necessary for tissue remodeling and repair. To prevent catastrophic autoimmune reactions, phagocytosis must be tightly regulated. It is commonly assumed that the recognition/selection of phagocytic targets is based solely upon receptor-ligand binding. Here we report an important new criterion, that mechanical parameters of the target can dramatically affect the efficiency of phagocytosis. When presented with particles of identical chemical properties but different rigidity, macrophages showed a strong preference to engulf rigid objects. Furthermore, phagocytosis of soft particles can be stimulated with the microinjection of constitutively active Rac1 but not RhoA, and with lysophosphatidic acid, an agent known to activate the small GTP-binding proteins of the Rho family. These data suggest a Rac1-dependent mechanosensory mechanism for phagocytosis, which probably plays an important role in a number of physiological and pathological processes from embryonic development to autoimmune diseases." @default.
- W1928407788 created "2016-06-24" @default.
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- W1928407788 creator A5078729046 @default.
- W1928407788 date "2002-02-15" @default.
- W1928407788 modified "2023-10-18" @default.
- W1928407788 title "Fc-receptor-mediated phagocytosis is regulated by mechanical properties of the target" @default.
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- W1928407788 doi "https://doi.org/10.1242/jcs.115.4.849" @default.
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