In vitro anti-inflammatory effect of CeONP in LPS-stimulated macrophage cells. mRNA expression levels of (A) TNFα, (B) IL-1β, and (C) representative mRNA gel electrophoresis image normalized to GAPDH. Cytokine secretion of (D) TNFα and (E) IL-1β (mean ± SD; n = 9 for mRNA, n = 6 for cytokine; n.s. not significant, **p < 0.01, ***p < 0.001 relative to untreated, LPS-stimulated group).