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Inhibition of OE-induced IL-6 and IL-8 production by NAC and SFN. BEAS-2B cells were pre-incubated with or without NAC or SFN for 2 h before exposure to OE for 16 h. (A and B) Effects of NAC and SFN on IL-6. (C and D) Effects of NAC and SFN on IL-8. Inset: Induction of HO-1 expression by SFN after a 6-h exposure. OE50: OE at 50 μg/ml. Values represent means ± SEM, n = 3. *p < 0.05 compared to the respective control; **p < 0.05 compared to OE without NAC.
