Figure 6
From: Antitumor activity of colloidal silver on MCF-7 human breast cancer cells
Superoxide dismutase activity in colloidal silver-treated MCF-7 and PBMC. MCF-7 breast cancer cells and PBMC were treated with colloidal silver for 5 h and then evaluated for superoxide dismutase (SOD) activity, as explained in methods. The experiments were performed in triplicates; data shown represent mean + SD of three independent experiments. *P < 0.05 as compared with untreated cells.