C. Raw 264.7 cells were treated with the indicated ASO for four days, or 50 μM EIPA (5-[N-ethyl-N-isopropyl]amiloride) for 20 min, prior to incubation for 60 min with fluorescent (tetramethylrhodamine, TRITC)-labeled dextran (70 kDa, shown as red color), transferrin, or IgG-conjugated agarose beads. Representative photomicrographs (from 30 images analyzed for each condition, from three biologically independent experiments) are shown. Cells were washed, fixed, and stained with DAPI (shown as blue color). Scale bars show 200 μm. D-F. Relative fluorescent signals were calculated as a percent of control-ASO treated cells to indicate (D) dextran or (E) transferrin uptake level. (F) For quantification of phagocytosis, the average number of IgG-agarose beads internalized were calculated as a percent of control-ASO treated cells. 30 images across three independent experiments were quantified for each condition, with each dot in the plot representing results from one image. The group means were calculated and shown. Error bars represent ± SEM. Significance was assessed by one-way ANOVA with Tukey's post hoc test, with *** representing P<0.0001, N.S P>0.05. 