Figure 3.

Activation of peripheral blood DCs. Dendritic precursor cells were incubated for 48 h in the presence of GMCSF (800 units/ml) and the CpG phosphorothioate oligonucleotide (2 μg/ml) as indicated. Expression of CD40 was examined (MFI, mean fluorescence intensity). Results represent the mean of four independent experiments; error bars indicate SEM. Statistical significance is indicated by ∗ (P < 0.05).