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Fig. 5. Neuroblastoma cells (NBP2) were plated in tissue culture dishes (60 mm), and the cells were gamma-irradiated 24 hours after plating. Vitamin E succinate or the solvent (ethanol 0.25% and sodium succinate 5 µg/mL) wag added immediately before irradiation. The drugs and medium were changed after two days of treatment. The number of cells per dish was determined after three days of treatment. Each experiment was repeated at least twice involving three samples per treatment. The average value (172 ± 7 x 104) of untreated control NB cells was considered 100%, and the growth in treated cultures was expressed as a % of untreated controls. The bar at each point is standard error of the mean [1].
