Fig. 2

Cell viability assessment by MTT and Trypan-blue staining. a MTT assay of γ-Fe₂O₃-DMSA labeled MSC. The data express average percentage and standard deviation of MSC that have remained viable after exposure to γ-Fe₂O₃-DMSA in four different concentrations at three different exposure times. b MTT assay of Au-DMSA labeled MSC. The average percentage and standard deviation of viable MSC are represented after 24 h of exposure to three different concentrations of Au-DMSA. (*) Significant reduction between the cells of the three experimental groups compared to the control group (p < 0.01). c MTT assay of Au-DMSA labeled MSC 4, 24, 48 and 72 h after incubation with the nanoparticles (90 µg/mL) during 24 h. There were significant differences between control cells and labeled cells only 4 and 24 h after exposure (p < 0.05). d Cell viability test by trypan-blue staining. The data express the mean percentage and standard deviation of MSC that remained alive after 24 h of exposure to 52 and 90 µg/mL of Au-DMSA and 60 and 80 µg/mL of γ-Fe₂O₃-DMSA