IL26 and colon carcinoma: After pre-incubation of VSV with IL-26 (1 or 5 μg/ml) or medium and subsequent infection of colon carcinoma Colo-205 cells at MOI = 0.01, a strong IL-26 concentration-dependent increase of the number of infected, GFP-expressing cells was observed in relation to medium-treated VSV as shown by fluorescence microscopy after 12 h (Figure 1A, upper panels).