Fig. 4

Cytotoxicity of free IFS and PD/IFS (with equivalent IFS concentration) on (a) MG63 (b) Saos-2 osteosarcoma cancer cells. The cytotoxicity assay was performed by MTT technique. The cells were incubated for 24 h and the experiment was repeated four times in triplicate. Optical images of (c) MG63 (d) Saos-2 cells after incubation with free IFS and PD/IFS for 24 h. **p < 0.01 is the statistical difference between IFS and PD/IFS in both cancer cells