Abstract
The effect of dl-alpha-tocopheryl (vitamin E) succinate in combination with Prostaglandin A2 (PGA2) and sodium butyrate on mouse neuroblastoma cells (NBP2) in culture, according to the criteria of growth inhibition and morphological differentiation (neurite formation), was studied. Results showed that PGA2 and sodium butyrate inhibited the growth of NB cells in a dose-dependent manner. The combined effects of vitamin E succinate with PGA2 or sodium butyrate, according to the criterion of growth inhibition, were additive. Vitamin E succinate by itself did not induce morphological differentiation, but it enhanced PGA2-induced morphological differentiation. Sodium butyrate alone or in combination with vitamin E succinate did not significantly increase the level of morphological differentiation. Sodium succinate and an equal amount of solvent (ethanol) failed to modify the effect of PGA2 or sodium butyrate. This suggests that the effect of vitamin E succinate in modifying the response of PGA2 and sodium butyrate on NB cells is due to the effect of vitamin E rather than to that of succinate.
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