Figure 1.

Effect of photodynamic therapy using talaporfin sodium (TS-PDT) on the viability of human umbilical vein endothelial cells (HUVECs). (a) HUVECs were treated with light irradiation alone, TS alone, or TS-PDT as indicated. Phase-contrast microscopy images were obtained (original magnification, 200×; scale bar, 50 µm). (b) Changes in the viability of the cells post TS-PDT were measured through cell proliferation assays. The IC₅₀ value was calculated. Data are presented as the means ± SE of three independent experiments.