Fig. 4. Plasma concentrations of (A) interleukin-6 (IL-6) and (B) tumour necrosis factor α (TNFα) and (C) activity of total nitric oxide (NO) in rats intratracheally instilled with either saline (control) or cerium oxide nanoparticles (CNPs), with or without cisplatin (CDDP) administration. Data are presented as means ± SEM (n=6-8).