Effect of IFN-γ on MDC mRNA expression. Ten micrograms of total RNA from monocytes stimulated for 24 hours with or without IL-4, IL-13 (20 ng/mL), and IFN-γ (500 U/mL) were analyzed with Northern blot. (A) Autoradiography of a representive experiment obtained after 6 hours of exposure. (B) Densitometric analysis of four independent experiments. Error bars indicate the SD.