Figure 2

Quantitative evaluation of the percentage of zonula occludens (ZO)-1/occludin colocalization in Calu-3 cells under basal culture conditions (Control) or after exposure to TNF-α, IL-4 or INF-γ. Data are reported as mean ± s.e.m.. ^*P<0.05, ^**P<0.01 and ^***P<0.001, versus control; ^##P<0.01 versus INF-γ-treated cells.