Fig. 9.
Effects of ATRA on the secretion of IFNα in the growth medium of NB4 cells. NB4 cells (4 × 105/mL) were treated for 4 days with medium containing the indicated concentrations of ATRA (A) or with medium alone (○) and medium containing 10−6 mol/L ATRA (•) for the indicated amount of time (B). The concentration of IFNα released in the medium was measured with a specific ELISA. Each experimental value is the mean ± SD of three separate culture dishes.
