PAF-induced IL-6 and IL-23p19 mRNA expression in LC. Monocyte-derived LC were stimulated with graded concentrations of PAF or its vehicle (ethanol; V) for 4 h. IL-23 p19 (a), IL-6 (b), and IL-1β (c) mRNA was then measured by real-time quantitative PCR. Data (means ± SEM) are expressed as fold induction relative to vehicle control. ; *; **.