Figure 5
From: Antitumor activity of colloidal silver on MCF-7 human breast cancer cells
Nitric oxide production in colloidal silver-treated MCF-7 and PBMC. Nitric oxide production at 5 h by colloidal silver-treated MCF-7 and PBMC, was measured using the nitric oxide colorimetric assay kit, as described 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.