Fig. 3

In vitro Cellular Uptake and Tissue-Specific Uptake Efficiency of Tof@BSA-Chs-CP NPs in Colitis Models. (A) Cellular uptake of NPs by Caco-2 cells. (B) Fluorescence microscopy profile of healthy colonic tissue or colitis tissue. Scale bars represent 50 μm. DAPI for nuclear staining; red, RBITC-labeled NPs.