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Cell uptake study. Flow cytometry analysis of cellular uptake of fluorescein 5(6)-isothiocyanate (FITC) HNPs in (A) A549 and (B) A549/T cells at a fixed FITC concentration of 50 ng/mL at 0.5, 1, 2, 4, 8, and 12 h. Microscopic images of (C) A549 and A549/T cells treated with FITC-A549/T CM-HNPs at a fixed FITC concentration of 50 ng/mL at 0.5, 1, 2, 4, 8, and 12 h. Scale bar: 100 μm, * p < 0.05 and *** p < 0.001 vs. FITC-HNPs.
