Fig. 3.

Viral infection causes antiviral cytokine production at the protein level by human mast cell line LAD2 cells. The production of IFN-α, IFN-β, CCL5, CXCL10, CXCL11 and IL-15 upon stimulation with the indicated concentrations of VSV for 24 h was measured by ELISA as described in the “Materials and methods” section. The columns present the mean ± SD of 3 separate experiments. *p < 0.05; **p < 0.01; ***p < 0.001 compared with un-stimulated cells