Figure 3: Transepithelial electric resistance (TEER) values of the ABB coculture of NCI-H441 (treated at day 3 with Dexamethasone 1 μM) and HPMEC-ST1.6R. TEER values are expressed as Ω cm2. The highest values of TEER were reached after 11–13 days in culture (  Ω cm2). Gelatine-coated inserts without cells were used as blank. Data are expressed as means ± S.E. of seven different experiments.