Fig. 6

a Tumor images (1: saline; 2: PTX injection; 3: SPC-NSps blank i.v.; 4:DSF/SPC-NSps i.v. 5 mg/kg; 5: DSF/SPC-NSps i.v. 10 mg/kg; 6: DSF/SPC-NSps i.v. 20 mg/kg; 7: DSF solution i.g.; 8: DSF/SPC-NSps i.g.) (n = 8, mean ± SD). b Distribution of DiR/DSF/SPC-NSps in the major organs of tumor-bearing mice at the end of the experiment (24 h). In vivo fluorescent images of tumor tissue and other vital organs (from left to right: tumor, heart, liver, spleen, lung, and kidney) (n = 5, mean ± SD)