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. 2020 Jan 23;10:1038. doi: 10.1038/s41598-020-57874-2

Figure 6.

Figure 6

Large particle binding causes the recruitment of lysosomal membrane proteins to the phagocytic sites in RAW264.7 macrophages. (AD) Selected frames from time-lapse confocal microscopy of RAW 264.7 macrophages transfected with indicated plasmids that were exposed to 4.5 µm IgG-coated polystyrene beads. In response to 4.5 μm IgG-coated particles, BK channels and other lysosomal membrane proteins were simultaneously recruited to the forming phagosomes within 4 min after phagocytosis initiation. The center of the particle is indicated with an asterisk. (E) Comparable recruitment kinetics of BK, TRPML1, Syt VII and Lamp1 to the particle-containing phagosomes in RAW264.7 macrophages were detected. Paxilline (1 µM) treatment inhibited the recruitment of lysosomal membrane proteins.