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Abstract
Abstract: Twenty-seven selenium compounds and sixteen structurally related organosulfur compounds were tested for quinone reductase (QR) and glutathione-S-transferase (GST) inducing activity in murine hepatoma (Hepa 1c1c7) cells. Sixteen selenium compounds were able to double QR activity, and seven of them also doubled GST activity. The nine most potent compounds, dimethyl diselenide, 2,5-diphenyl- selenophene, dibenzyl diselenide, methylseleninic acid, diphenyl diselenide, benzeneseleninic acid, benzene selenol, triphenylselenonium chloride, and ebselen (2-phenyl- 1,2-benzisoselenazol-3(2H)-one), doubled QR-specific activity at levels lower than 7 μM. The concentration-dependence of QR induction and cell growth inhibition were linearly correlated (P < 0.001, r2 = 0.96) among the group of organoselenium compounds with putative selenol-generating potential, implying that both responses of Hepa 1c1c7 cells were based on these selenol metabolites.
