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Uptake ability of A549 cells for the engineered exosomes. (a) MiR-563 loaded exosome uptaken by A549 visualized using confocal microscopy. Scale bar = 100 nm. (b) MiR-563 expression was assessed by real-time qPCR. ∗ ∗ ∗P < 0.001vs. the unloaded Exo group.
