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Uptake of PKH26-labeled exosomes by SH-SY5Y cells. (A) Confocal images of cultures exposed to HA-Exo, and US-HA-Exo for up to 4 h. Fluorescent signals are merged with transmission images (red = PKH26, blue = DAPI). Scale bar is 10 µm. (B) Images of SH-SY5Y cells were taken. (C) CCK-8 assays were performed.
