Figure 3.

Cell proliferation in A498 (a), Caki1 (b), and KTCTL-26 (c) cells cultured with 0, 0.1, 0.2, and 0.4 µg/mL curcumin without (black bars) or with irradiation (grey bars). Irradiation was done with 5500 lx visible light for 5 min. Tumor cells were then subjected to the BrdU incorporation test following a further 24 h incubation in cell culture medium without curcumin. BrdU-incorporation is expressed as percentage of the untreated cells. Each experiment was done in triplicate and repeated five times. Data from one representative experiment are shown. * Indicates significant difference to controls.