Figure 4

DCQ is not cytotoxic to normal intestinal cells. DCQ at concentrations of up to 10 μM did not reduce FHs74 Int human normal intestinal cell viability. At 50% confluency, cells were exposed to DCQ for 6 hr or were left untreated. Viability was assessed by the Cytotox 96 non-radioactive assay (A) and by the MTT-based Promega assay (B). Values are averages ± SE of two independent experiments each done in triplicates. The experiment was repeated three times each in triplicates.