Expression of DC-SIGN and of ILT-2, ILT-3, and ILT-4 by DCs. The frequency of DCs expressing DC-SIGN was markedly lower in IL-16/TPO-DCs compared with the DCs grown in the other cytokine combinations. In the same cells the frequency of DCs expressing ILT-2, ILT-3, and ILT-4 was markedly higher. The mean ± SEM of 4 independent experiments is shown. Comparison between treatments performed with the paired Wilcoxon signed rank test.