Proinflammatory cytokine response potentiated in E. faecalis-induced DCs. Levels of mRNA expression of IL-1β, TNF-α, IL-12, TGF-β1 by RT-PCR, normalized relative to GAPDH, in control DCs, LPS-stimulated control DCs, and E. faecalis-induced DCs. The experiment was repeated three times in triplicates.