Biodistribution of ST and DT liposomes in tumor-bearing mice.

<p>Radiolabeled PEG-Lip (open bar), PRP-PEG-Lip (light grey bar), RGD-PEG-Lip (dark grey bar), or Dual-PEG-Lip (closed bar) were injected into Colon26 NL-17-bearing mice (<i>n</i> = 5) via a tail vein at 10 days after the tumor inoculation. At 24 h after the injection, the radioactivity in each organ was determined. Data are shown as a percent of the injected dose per 100 mg tissue and SD. Significant differences: *, <i>P</i><0.05; **, <i>P</i><0.01; ***, <i>P</i><0.001.