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Schematic illustration (A) showing the photothermally enhanced cellular uptake of BP-HSA-PTX. Confocal images of U87MG cells incubated with PBS (B), FITC-labeled BP-HSA-PTX without (C) or with (D) NIR light irradiation (30 min). The temperature of cell medium was maintained at 42.5 ± 0.5 °C by adjusting the power density. (E) Mean FITC fluorescence intensity determined in cells in Figure 4B-D.
