Figure 4.

Fluorescent microscopic images of K562 cells (A) treated with free daunorubicin (left panel) and titanium dioxide nanoparticles loading daunorubicin as a drug delivery system (right panel). Comparison of the respective average intracellular fluorescence intensity is also shown (B). Concentrations of daunorubicin and titanium dioxide nanoparticles are 0.5 μg/mL and 10 μg/mL, respectively. Note: Data expressed as mean ± standard deviation (n = 3).

Abbreviations: DNR, daunorubicin; Nps, nanoparticles; TiO₂, titanium dioxide.