Fig. 4

In vitro and in vivo biocompatible evaluation. The cell viability of NIH-3T3 incubated with various concentrations of a GNPs, b magnetic MMT and c MCG. d MCG embedded tissue and healthy tissue examination by Masson’s trichrome and H&E staining (Scale bar: 50 μm). e The hematological analysis of mice 2 weeks after injection of PBS and MCG