Fig. 9.
MRI of the cross section of the U87MG tumors implanted in a mouse: (a) without NPs, (b) with the injection of 300 μg of c(RGDyK)–Fe3O4 NPs, and (c) with the injection of a blocking dose of c(RGDyK) then c(RGDyK)–Fe3O4 NPs; and Prussian blue staining of U87MG tumors in the presence of (d) c(RGDyK)–Fe3O4 NPs and (e) a blocking dose of c(RGDyK) and then c(RGDyK)–Fe3O4 NPs. Reproduced with permission from ref. 39.