Figure 5.
The effect of cadmium telluride quantum dots (CdTe-QDs) on PA01 cytotoxicity activity. J774A.1 macrophages (A) and HT29 epithelial cells (B) were exposed to QD-1 and then PA01 (107 bacteria/ml). Bioreduction activity of 6 h-treated cultures was measured and is shown relative to controls. CdTe-QD concentrations from 10-7 to 10-3 µg/ml alone did not cause observed cytotoxicity, but caused a greater loss of bioreduction for each cell type when being subsequently exposed to PA01, compared with treatment of PA01 alone. Asterisks (*) and (**) indicate statistically significant differences compared with control with p < 0.001 and with p < 0.05, respectively.