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(+)Exosome-activated macrophages are characterized by increased phagocytosis. A total of 1 × 105 macrophages were incubated with LPS (50 ng/mL), M. avium (MOI of 10), (−)exosomes or (+)exosomes (50 μg/mL), or medium alone for 24 h. Data are presented as the mean ± SEM (n = 3 per group, * P < 0.05 compared with the control group).
