Figure 5From: Intracellular expression of toll-like receptor 4 in neuroblastoma cells and their unresponsiveness to lipopolysaccharideEffect of LPS on NF-κB activation in NB-1 cells. Transfected NB-1 cells were treated with LPS at various concentrations for 6 h. The NF-κB activity was expressed as relative luciferase activity by fold increase. IL-1β (0.1 μg/ml) was used as a positive inducer of NF-κB. A typical experimental result of three independent experiments is shown.Back to article page