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Fig. 2 | Journal of Nanobiotechnology

Fig. 2

From: Gelatin–chlorin e6 conjugate for in vivo photodynamic therapy

Fig. 2

Cellular uptake of gelatin–Ce6 into SCC-7 tumor cells. a Confocal fluorescence microscopy images of free Ce6, gelatin–Ce6-2, and gelatin–Ce6-8 in SCC-7 cells after treatment for 2 h. The fluorescence of Ce6 was detected by Cy5.5 filter (red), and DAPI staining (blue) shows nuclei. The Ce6 concentration was 8.0 μg/mL (scale bar = 20 μm). b Fluorescence intensity analysis after treatment with free Ce6, gelatin–Ce6-2, and gelatin–Ce6-8 at varied concentrations of Ce6. c Flow cytometer data of SCC-7 cells incubated with media alone (black), free Ce6 (red), gelatin–Ce6-2 (blue), or gelatin–Ce6-8 (orange) for 2 h at a 0.2 μg/mL Ce6 concentration

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