Reconstitution of cellular GSH levels with GSH-OEt. T cells, NK cells, monocytes, immature DCs, and mature DCs (0.5 × 10⁶/mL) were treated with 4-OH-IF (100 μM) for 90 minutes. GSH-OEt was added at a final concentration of 0.4 mM for 5 hours. Untreated cells were used as controls. Cells were then washed, and GSH levels were determined. Results are expressed as the percentage of control values and represent the mean ± SD from 3 separate experiments. ^*P < .05.