dl- -Tocopheryl Succinate Enhances the Effect of -lrradiation on Neuroblastoma Cells in Culture

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Abstract
The effect of dl-.alpha.-tocopheryl (vitamin E) succinate in modifying the radiation response of mouse neuroblastoma (NBP2) and mouse fibroblast (L-cells) cells in culture was studied on the criterion of growth inhibition (due to cell death and inhibition of cell division). Vitamin E succinate markedly enhanced the effect of 60CO-.gamma.-irradiation on NB cells, but it did not significantly modify the effect of irradiation on mouse fibroblasts. Sodium succinate plus ethanol (0.25% final concentration) did not modify the radiation response of NB cells or fibroblasts. Butylated hydroxyanisole, a lipid soluble antioxidant, also enhanced the effect of irradiation on NB cells, indicating that the effect of vitamin E in modifying the radiation response may be mediated, in part, by antioxidation mechanisms.

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