H2AX and neuroblastoma: In addition, the genotoxic effect of strong THz radiation alone on human drNPCs (relatively normal neuron-like cells) and neuroblastoma cells, as well as in combination with salinomycin, a promising anti-tumor agent, on neuroblastoma cells, were studied, based on the analysis of the number of foci of histone H2AX (γH2AX) phosphorylation.