Fig. 6From: Differential effects of selenium and knock-down of glutathione peroxidases on TNFα and flagellin inflammatory responses in gut epithelial cellsEffects of Se depletion and GPX1 knock-down on levels of reactive oxygen species in Caco-2 cells. ROS levels were determined in extracts of Caco-2 cells using carboxy-H2DCFDA fluorescent indicator. a Comparison between cells grown in Se-depleted and 40 nM Se-supplemented medium. b Comparison between cells grown in Se-supplemented medium but treated with 80 pmol negative control siRNA or GPX1 siRNA.***P < 0.001Back to article page