Treatment of human tongue squamous carcinoma cell, SCC-25, with physiological concentrations of vitamin E succinate (VES) which varied from 0.001 to 50 mumoles/L resulted in significant dose-dependent stimulation of cell growth. Whereas, pharmacological doses of the vitamin (100-154 microM) induced significant inhibition in cell growth. The possible anticarcinogenic mechanisms of action of vitamin E are discussed.
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