Figure 7.
Whey protein concentrate (WPC)-induced reduction of Nrf2 nuclear accumulation and mTORC1 activation are disrupted by GSK3β siRNA. MDA-MB-231 cells were transfected with non-specific siRNA or GSK3β-targeting siRNA and treated for 48 hours with 10 mg/mL WPC. (a) Representative western blots showing GSK3β protein levels. β-actin was used as a loading control. (b) Representative western blots showing cytosolic and nuclear levels of Nrf2. Lamin B and α-tubulin were used as loading controls for nuclear and cytosolic fractions, respectively. (c) Bar graphs showing relative nuclear/cytosolic Nrf2 ratios. (d) Representative western blots demonstrating levels of p-mTOR (Ser2448) and mTOR. β-actin was used as a loading control. (e) Bar graphs displaying relative p-mTOR/mTOR ratios. Data represent the means ± SD from three experiments. *P < 0.05; n.s.: not significant.