Fig. 3

The uptake of DOX and inhibitory effect of DOX and LIUS. a, b, Fluorescent images of the uptake of DOX in OSCC cells treated with 0.2 μg/ml DOX after LIUS exposure. The cells were treated and incubated for 4 h. Subsequently, the cells were washed and immediately visualized by confocal microscopy. After 24 h, cell viability was evaluated by MTT assay for OSCC cells (c) and HT293 cells (d)